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1. Which standards govern the specifications for supply of Residual Marine Fuels and Distillate Marine

Fuels onboard merchant ships?

A. ISO 3012:1999

B. ISO 3648:1996

. ISO 8216-1:2010

D. ISO 8217:2010

!. ran" #eb deflection readings #ill give a positive indication of

A. worn main bearing journals

. !orsional s!ress "e#orma!ion

$. sla%& !'rus! bearings

(. bearing s'ells s'im "imensions

$. %&D stands for #hich type of boiler

A. )*!ernal su+er'ea!er (-!,+e

. )mergen%, s'u!"own oiler

$. )*!reme Su+er'ea! !,+e

(. )*!ernal Su+er'ea! (e-su+er'ea!er !,+e

'. (he advantage of tie rods over an engine #ithout tie rods is that)

A. 'e engine is er, easil, aligne" a#!er an, misalignmen! 'as !a&en +la%e be!ween "i##eren! %om+onen!s o#

!'e engine

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. 'e engine "oesn///! re uire !'rus! +a"s #or !ransmission o# !'rus! !o !'e s'i+///s 'ull as !'e same is being

!a&en %are o# b, !'e !ie ro"s

$. 'e engine %om+onen!s are mu%' lig'!er lea"ing in o erall re"u%!ion is engine weig'! wi!' a 'ig' +ower

genera!ion wi!' !'e elimina!ion o# #a!igue s!resses

(. 'ere are no a" an!ages o# engines wi!' !ie ro"s be%ause !ie ro"s re uire regular main!enan%e an"

re+la%emen! li&e %onne%!ing ro"s an" o erall engine be%omes more e*+ensi e !o o+era!e

*. Which of the follo#ing is an e+ample of a solid bearing?

A. is!on +in bus'ing

. urbo-genera!or !urbine bearing

$. S+ring bearing

(. 'rus! bearing

,. -n order for microbiological gro#ths to thrive in a fuel tan" it is necessary for

A. 'ig' !em+era!ures !o e*is!

. low !em+era!ures !o e*is!

$. small amoun!s o# wa!er !o be +resen!

(. large amoun!s o# wa!er !o be +resen!

. Marine boilers burning /.F.0. face a problem of cold corrosion due to high sulphur content. (he

minimum flue gas temperature #ithin any boiler part is "ept above due point of /!&0'. (he actual de#

point of /!&0' in flue gases depends on the)

A. oiler #urna%e !em+era!ure

. Ambien! air !em+era!ure

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$. oiler o+era!ing +ressure

(. O sul+'ur %on!en! an" mois!ure in %ombus!ion air

. (he purpose of an air cooler in a supercharging system is to)

A. 5e"u%e !em+era!ure o# su+er%'arge" air in or"er !o %on"ense an" remo e ma*imum +ossible mois!ure #rom

!'e air +rior en!r, !o !'e engine

. 5e"u%e !'e !em+era!ure o# !'e su+er%'arge" air in or"er !o in%rease !'e "ensi!, also !o %ool "own below

"ew +oin! !o remo e mois!ure #rom air +rior en!r, !o !'e engine

$. $ool su+er%'arge" air !o in%rease i!s "ensi!, su%' !'a! !'e "ew +oin! is no! rea%'e" !o a oi" en!r, o# mois!ure

in!o !'e engine

(. $ool su+er%'arge" air !o in%rease i!///s "ensi!, an" also !o &ee+ !'e +ea& !em+era!ure an" e*'aus! gas

!em+era!ure wi!'in limi!s

2. 3se of /alon as fire e+tinguishing medium has been discontinued because

A. I! is 'ig'l, !o*i%

. I! is e*+ensi e

$. I! 'as 'ig' O one "e+le!ing +o!en!ial

(. I! lea"s !o a%i" rains

14. -n comparison to e+haust valves5 inta"e valves of diesel engines may be fabricated from lo#6alloy

steels because

A. !'e be ele" e"ges o# !'e in!a&e al es +ro i"e #orsel#-%en!ering "uring sea!ing

. in!a&e al es u!ili e s!elli!e-%oa!e" al e sea! inser!sw'i%' re"u%e wear

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$. !'e olume o# air +assing !'roug' in!a&e al es is less !'an !'e olume o# air +assing !'roug' e*'aus!

al es

(. in!a&e al es are less a##e%!e" !o !'e %orrosi e a%!ion o# e*'aus! gases

11. Why is it essential to rene# turbocharger bearings after a preset number of hours of running even if

the bearings are in seemingly perfect condition?

A. e%ause !'e, are +rone !o #ailure "ue !o +rolonge" e*+osure !o 'ig' !em+era!ure %on"i!ions.

. e%ause !'e, are subje%! !o %,%li% loa"ing an" are +rone !o #ailure "ue !o me!al #a!igue.

$. I! is no! essen!ial !o renew i# %on"i!ion moni!oring sugges!s +er#e%! %on"i!ion.

(. ube oil %on!amina!ion is boun" !o o%%ur an" a##e%! !'e %on"i!ion o# !'e bearings.

1!. Which of the follo#ing statements is true?

A. 'e ro!ar, ane !,+e s!eering gear generall, o+era!es a! 'ig'er oil +ressures !'an !'e ram !,+e.

. 'e ram !,+e s!eering gear generall, o+era!es a! 'ig'er oil +ressures !'an !'e ro!ar, ane !,+e.

$. o!' ram !,+e an" ro!ar, ane !,+e s!eering gears generall, o+era!e a! similar oil +ressures

(. one o# !'e abo e

1*. Modern marine turbochargers use a 77777777777 type of compressor

A. 5a"ial #low

. A*ial #low

$. i*e" #low

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(. urbulen! #low

1,. Which of the follo#ing is a disadvantage of #ater as cooling medium for pistons5 #hen compared to

oil?

A. $'emi%al !rea!men! is re uire"

. ig'er !'ermal s!resses in +is!on

$. is!on o# more %om+li%a!e" "esign

(. All o# !'e abo e

1 /o# is the concentration of dissolved o+ygen in the feed #ater of an au+iliary boiler maintained at

acceptable limits?

A. ee" wa!er is %,%le" !'roug' a ($ 'ea!er.

. ee" wa!er is !rea!e" wi!' +'os+'a!es.

$. O*,gen is libera!e" in !'e !'ree-s!ages o# #ee" wa!er +re'ea!ing.

(. O*,gen is libera!e" b, main!aining !'e 'ig'es! +ra%!i%al #ee" wa!er !em+era!ure

1 . -n a !6stro"e marine diesel engine if the o6ring for 8ac"et cooling #ater sealing is lea"ing then

A. 'e wa!er will lea& "ire%!l, in!o !'e %ran&%ase

. 'e wa!er will lea& in!o !'e un"er +is!on s+a%e

$. 'e wa!er will %ome ou! !'roug' !ell-!ale 'ole +ro i"e" be!ween !'e !wo o-rings

(. 'e wa!er will %ome ou! #rom !'e !o+ o# %,lin"er ja%&e!

12. (he lube oil pump used in a diesel engine is a

A. olu!e +um+

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. %en!ri#ugal +um+

$. "ia+'ragm +um+

(. gear +um+

!4. 9rior to lighting off a cold automatically fired au+iliary boiler5 you should

A. %'e%& an" regula!e !'e wa!er le el

. %lose !'e air %o%& on%e #ires are li!

$. blow "own !'e gage glass

(. %ra%& !'e s!eam s!o+ !o assure +ro!e%!i e s!eam #low

!1. &team temperature control for the %&D6-- boiler is achieved by )

A. i!!ing a "e-su+er'ea!er be!ween 1s! 2n" +asses o# su+er'ea!er

. i!!ing an a!!em+era!or be!ween 1s! 2n" +asses o# su+er'ea!er

$. ;as "am+ers in boiler u+!a&e

(. ,+assing !'e su+er'ea!er

!!. (he coating #hich is provided on the valve stem of e+haust valves of modern marine diesel engines is

of)

A. i%&el

. S!elli!e

$. $'romium

(. imoni%

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!$. -f the combustion control system of an automatically fired au+iliary boiler fails to sustain burner

ignition af ter a normal shutdo#n5 you should chec" for a:an

A. #aul!, +'o!o%ell "e!e%!or

. low s!eam +ressure

$. 'ig' ol!age on !'e igni!ion ele%!ro"e

(. o+en air "am+er

!'. Which of the follo#ing statements is true5 about slo# speed engines?

A. A s%a enge #ire %an lea" !o a %ran&%ase e*+losion

. A s%a enge #ire %an lea" !o "e#orma!ion o# "ia+'ragm +la!e

$. A s%a enge #ire %an lea" !o "amage !o !ie ro"s.

(. All o# !'e abo e.

!*. For a t#o stro"e engine t#o o6rings are provided on the liner. (he function of the top o6ring is to

77777777777 and function of the lo#er o6ring is to 777777777777

A. Seal ja%&e! %ooling wa!er< a%! as se%on"ar, seal in %ase 1s! o-ring lea&s

. Seal ja%&e! %ooling wa!er Seal s%a enge air

$. Seal s%a enge air Seal =a%&e! %ooling wa!er

(. Seal %ombus!ion gases Seal ja%&e! %ooling wa!er

!,. %ven if there is an oil mist concentration inside a cran"case5 and there is also a hot spot5 cran"case

e+plosion #ill only ta"e place #hen

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A. 'e 'o! s+o! +ro i"es !'e igni!ion !em+era!ure #or !'e oil mis! %on%en!ra!ion

. >'en !'e oil mis! - air mi*!ure is in !'e #lammable range

$. o!' A an"

(. one o# !'e abo e

! . Which of the follo#ing conditions is responsible for the fuel oil to atomi;e #hen using a steam

atomi;er in an au+iliary boiler?

A. )*+ansion o# !'e s!eam in !'e #urna%e.

. )*+ansion o# !'e s!eam in !'e w'irling %'amber.

$. )*+ansion o# !'e s!eam in !'e ori#i%e +la!e.

(. All o# !'e abo e.

! . &ome '6stro"e engines are fitted #ith a rotorcap on the cylinder head valves. For #hat reason?

A. 5o!a!e !'e inle! al e "uring o+era!ion.

. (is!ribu!e !'e e*'aus! gas or !'e air inle! be!!er !o im+ro e %ombus!ion.

$. Im+ro e !'e s%aling sur#a%e #un%!ion in%rease !'e ser i%e !ime o# !'e e*'aus! al e in !'e engine

(. o +re en! !'e al e s+in"le #rom s!i%&ing

$4. &haft tunnel re

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$1. What do you mean by surge limit of a turbocharger?

A. haracteristic curve of a turbocharger

B. 9ortion of compressor characteristic curve #hich lies on the left side of the point of ma+imum

pressure

. A line >oining all the points of ma+imum pressure on compressor characteristic curves 5 dra#n

at various speeds of operation

D. Ma+imum rpm limit of (: above #hich surging #ill start

$!. A large5 lo#6speed5 main propulsion diesel engine uses sea #ater to directly cool the

A. cylinder heads

B. e+haust valves

. scavenging air

D. in>ectors

$$. %+haust rouping is re

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A. 9rotect superheater from overheat

B. ontrol superheater steam outlet temperature

. -ncrease the efficiency of the boiler

D. Reduce steam temperature for au+iliary uses after steam superheater

$*. Which of the follo#ing statements is false?

A. 0+idation of lubricant leads to decrease in its viscosity

B. Formation of o+idation acids5 sulfuric acid leads to depletion of (B@ of lubricant

. ontamination #ith #ater #ill lead to decrease in the load carrying capacity of a lubricant .

D. Build up of insolubles #ill lead to increase in viscosity of a lubricant

$ . After prolonged operation5 >er" type fuel pumps #ear on the top edge of plunger and edges of spill

ports and heli+ due to erosion by high pressure fuel as it spills. (his #ear #ould result in

A. ate start of in>ection and early end of in>ection

B. %arly start of in>ection and late end of in>ection

. %arly start of in>ection and early end of in>ection

D. ate start of in>ection and late end of in>ection

$ . abyrinth seal fitted on the bac" surface of a compressor #heel of a turbocharger)

A. 9revents bearing lube oil contamination

B. 9revents bearing lube oil being suc"ed into the air stream

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. /elps to "eep the shaft cool by controlled lea"age of air

D. @one of the above

$2. -t is a "no#n fact that centrifugal pumps re

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$. 'in !o+ +or!ion !o re"u%e !'ermal gra"ien!s an" 'en%e !'ermal s!resses w'ile su++or!ing ribs !o !a&e %are o#

me%'ani%al s!resses

(. 'i%& !o+ +or!ion !o !a&e %are o# 'ig' me%'ani%al s!resses wi!' ja%&e! %ooling %ombine" wi!' allowan%e #or

!'ermal e*+ansion !o minimi e !'e !'ermal s!resses

'!. Which of these fuel oil impurities can cause ma+imum abrasive damage?

A. >a!er

. As'

$. $a!al,!i% #ines

(. So"ium

'$. -n modern marine !6stro"e diesel engines5 7777777777777777 is sometimes used as a coating on the

underside of the e+haust valve disc5 to reduce the rate of hot corrosion.

A. onel

. $'romium

$. In%onel

(. $erme!

''. -rregular circumferential #ear of liner due to diminishing neutrali;ing capacity of cylinder oil a#ay

from lubricating holes is "no#n as)

A. i%ro sei ure

. S%u##ing

$. S%oring

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(. $lo er lea#ing

'*. Which of the follo#ing is a reasonable statement about #ater #ashing of turbine side of a (: ?

A. I! lea"s !o !'ermal s'o%& an" re"u%es !'e li#e o# !'e ?$

. I! lea"s !o !'ermal s'o%& an" no! so e##e%!i e as soli" was'ing

$. I# +ro+erl, %arrie" ou! &ee+ing r+m loa" !em+era!ure limi!s o!'er #a%!ors in!o a%%oun!< i! is ui!e

sa#e an" more e##e%!i e !'an soli" was'ing

(. I! s'oul" ne er be %arrie" ou! as mos! o# !'e engine manu#a%!urers re%ommen" agains! !'e same

',. Which of the follo#ing statements correctly describes the phenomenon of surging in a !6stro"e

crosshead type engine?

A. (ue !o su""en in%rease in engine loa" !'e e*'aus! gases ma, #low ba%& !'roug' s%a enge +or!s

%ausing surge

. (ue !o su""en "e%rease in engine loa" !'e !urbo%'arger +ressure ra!io "ro+s . 'is %auses 'ig'

+ressure "owns!ream o# ?$ in s%a enge !run& %ausing #low re ersal o# s%a enge air

$. (ue !o su""en in%rease in engine loa" !'e ?$ !urbine r+m ma, in%rease su""enl, in%reasing !'e

%om+ressor +ressure ra!io !o surge

(. (ue !o su""en "e%rease in engine loa" !'e !urbo%'arger ma, s!all as !'e 'ig'er +ressure "owns!ream

in e*'aus! s,s!em ma, %ause re ersal o# #low o# e*'aus! gases

' . -f the boiler tubes are scaled on the #ater side then

A. ea! %on"u%!ion !'roug' !'e !ubes will be er, 'ig' lea"ing !o ra+i" e a+ora!ion

. 'e boiler #urna%e %an ge! "amage" "ue !o e*%essi e !em+era!ures

$. 'e sur#a%e o# !'e !ube will be o er'ea!e" as 'ea! !rans#er is im+aire"

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(. 'e na!ural %ir%ula!ion o# wa!er wi!'in !'e boiler will be more e##i%ien!

' . Fins are installed on the generating tube surfaces in #aste heat boilers to

@A re en! soo! #ires in !'e e*'aus! s,s!em

@ re en! e*'aus! gas erosion o# !'e !ubes

@$ In%rease !'e elo%i!, o# e*'aus! gas #low

@( In%rease !'e ra!e o# 'ea! !rans#er

'2. Any steering gear system alarm can only be successfully ac"no#ledged from

A. 'e bri"ge

. 'e engine %on!rol room

$. 'e s!eering %om+ar!men!

(. 'e s'i+Bs o##i%e

*4. (o chec" the setting of the over speed trip on a diesel po#ered generator5 you #ould use a

A. !a%'ome!er

. !orsion me!er

$. ",namome!er

(. +on, bra&e

*1. Which of the follo#ing specifications:

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$. (e!ergen%,

(. S+e%i#i% gra i!,

*!. What is meant by elastohydrodynamic lubrication?

A. orma!ion o# ',"ro",nami% #ilm un"er 'ig' +ressure wi!' minor elas!i% "e#orma!ion o# ma!ing

sur#a%es "is!ribu!ing loa" o er a grea!er area

. A""i!ion o# e*!reme +ressure a""i!i e @) !o !'e lubri%an!

$. A""i!ion o# Cis%osi!, in"e* im+ro emen! a""i!i e

(. A""i!ion o# elas!omer base" a""i!i es

*$. -n a bypass type filtering system for a medium or high speed diesel engine5 the lube oil bypassing the

filter

A. re!urns "ire%!l, !o !'e su%!ion si"e o# !'e +um+

. re!urns "ire%!l, !o !'e sum+

$. #lows !o !'e engine bearings

(. #lows !'roug' a se%on"-s!age s!rainer re'ea!er an" re!urns !o !'e sum+

*'. Which type of boiler burner has ma+ turn do#n ratio? ratio of ma+ press to min press is called turn

do#n ratioC!4)1 is ma+=

a. ressure se!

b. s+inning %u+

%. S+ill !,+e

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". D-je! !,+e

**. Most steam traps respond #ell to cleaning. But #hen a thermodynamic trap fails to operate after

cleaning5 the ne+t course of action should be

A. !'ro!!le !'e s!eam ou!le! al e

. renew !'e !ra+

$. la+ !'e "is% an" sea! !'e !ra+

(. !'ro!!le !'e s!eam inle! al e

*,. (ypes of corrosion in fresh #ater of D:%

a. &tress

b. hot corrosion

c. bimetallic

d. selective phase corrosion

* . Which of the follo#ing types of damages are metal seatings of a valve sub>ect to? hoose the correct

alternative.

A. orrosion5 %rosion5 Abrasion5 Deformation

. $orrosion a!igue #ailure bri!!le #ra%!ure %aus!i% %ra%&ing

$. )rosion %aus!i% %ra%&ing bri!!le #ra%!ure $lo er lea#ing

(. one o# !'e abo e

* . When A:% stand by F.0.heater to be used for main engine

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A. Su""en o+ening .O. inle! al e +ressuri e" an" "amage !'e 'ea!er

. .O. in a+or lo%& insi"e 'ea!er allow s!eam

$. .O. inle! al e %auses +ressure "ro+ ?) .O. +ressure s!an"b, wa!er is no! +ressuri e" ma, %ause

su""en %'ange in engine ?+er loa"?r+m

(. 'ea!er lea&ing.

*2. iscosity of fuel oil used for M% #as 1'*cst5 ne# fuel comes #hose viscosity #as more than earlier5

#hat u should do

a In%rease !em+ se!!ing

b $'ange se!!ing o# is%o!'erm

% (o no!'ing

" O+en s!eam al e manuall, more

,4. Which of the follo#ing can be done to reduce the cold corrosion of Main %ngine cylinder liners using

high sulphur fuel oil

A. In%reasing %,lin"er oil #ee" ra!e

. Esing 'ig' %,lin"er oil

$. In%reasing s%a enge air !em+era!ure

(. (e%reasing %,lin"er oil #ee" ra!e

,1. When m:e is running in emergency condition #hich of the alarms canEt be bypassed

1. O low +ressure

2. =a%&e! wa!er 'ig' !em+

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3. is!on %ooling wa!er 'ig' !em+

4. All !'e abo e

,!. Which of the follo#ing #ill be re

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1. i* !wo lubes oil

2. $on!imani!iFn o# ',"ro",nami% lube oil.

3. i*e" grease an" oil

,,. (he muffling of e+haust gas noise in ' stro"e au+iliary engines in achieved by

@a Allowing !'e gas !o e*+an".

@b $'ange !'e "ire%!ion o# !'eir #low.

@% $ool !'e gas wi!' inje%!e" wa!er.

@" $ool !'e gas wi!' s%a enge air.

, . An au+iliary engine turbo6charger ma"es strange noises #hen the load changes. (he engine

parameters ho#ever are absolutely fine. An e+ternal e+amination of turbocharger parameters as stated in

the manual also reveals nothing. Would you

@a $on!inue !o run !'e engine an" wai! #or some !ime

@b S!o+ !'e engine #or a w'ile an" ma&e some %'e%&s

@% 5e"u%e !'e loa" o# !'e engine

@" 5un i! on s!ea", loa" !o ma&e some %'e%&s.

, . (o avoid the engine running too long on critical speed during start up it is necessary to

@a S!ar! a! s+ee"s abo e %ri!i%al s+ee".

@b S!ar! a! s+ee"s jus! below %ri!i%al s+ee" an" ui%&l, mo e a%ross !'e %ri!i%al s+ee".

@% S!ar! a! ma*imum s+ee" an" ui%&l, bring "own !o jus! abo e %ri!i%al s+ee".

@" )limina!e !o!all, !'e 'a ar"s o# %ri!i%al s+ee" b, ignoring i!.

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,2. &upercharging an e+isting medium speed naturally aspirated engine #ill

@a 5e"u%e weig'! o# !'e engine.

@b 5e"u%e bul& o# !'e engine.

@% In%rease e*is!ing +ower.

@" In%rease +is!on s+ee".

@e 5e"u%e #uel %onsum+!ion.

1. When using lo# sulfur fuel oil for %mission ontrol Areas % A???&=5 ideally the (B@ of the cylinder

oil used should be

A. ower !'an normal

. ig'er !'an normal

$. Same as normal

(. Same as normal i# !'e #ee" is &e+! 'ig'er

!. Which of the follo#ing functions is done by a cam operating an e+haust valve?

A. I! go erns !'e !iming o# o+ening an" %losing o# !'e al e.

. I! go erns !'e s+ee" a! w'i%' !'e al e o+era!es

$. I! go erns !'e amoun! o# o+ening o# !'e al e

(. All o# !'e abo e

$. -n the latest concept of ariable eometry (urbocharging5 7777777angle can be varied to match the

turbocharger at varying engine loads

A. $om+ressor ane

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. urbine bla"e

$. o le ring bla"e

(. (i##user ring bla"e

'. (he primary function of a flame safeguard system5 as used on an automatically fired au+iliary boiler5

is to prevent

A. a%%i"en!al "r, #iring an" o er+ressure

. un%on!rolle" #ires in !'e #urna%e

$. e*+losions in !'e boiler #urna%e

(. e*+losions in !'e boiler #urna%e

*. Directional inta"e ports in diesel engines are used to

A. re"u%e air %'arge !urbulen%e

. in"u%e air swirl

$. "e#le%! 'o! %ombus!ion gas awa, #rom !'e al es

(. o++ose !'e e##e%!s o# +is!on in"u%e" s uis'

,. Why does a chain stretch in service?

A. (ue !o +las!i% elonga!ion

. (ue !o 'ig' !em+era!ure e*+ansion

$. (ue !o wear on rollers an" bus'es

(. (ue !o !'e +'enomenon o# %ree+

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. Which of the follo#ing methods is normally used to lubricate bearings in a small high6speed diesel

engine?

A. S+las' lubri%a!ion

. ressure lubri%a!ion

$. Sig'! #ee" lubri%a!ors

(. e%'ani%al lubri%a!ors

. %+ternal fouling of boiler tubes can lead to)

A. ;rea!er s!eam genera!ion

. ube %orrosion

$. ube )rosion

(. ro!e%!ion o# !ube agains! %orrosion

2. What is the purpose of the inlet grid provided #ithin the e+haust gas casing in the gas flo# path5 prior

entry to turbocharger ?

A. o #il!er ou! an, unburne" %arbon

. o absorb an" "am+en !'e +ressure #lu%!ua!ion

$. o re"u%e noise in !'e %ons!an! +ressure e*'aus! +i+ing

(. o +re en! an, bro&en +is!on rings #in"ing !'eir wa, !o !urbine

4. (he main function of tie rods in the construction of large5 lo# speed diesel engines is to

A. s!i##en !'e be"+la!e in wa, o# !'e main bearings !o in%rease !'e engineBs longi!u"inal s!reng!'

. a%%e+! mos! o# !'e !ensile loa"ing !'a! resul!s #rom !'e #iring #or%es "e elo+e" "uring o+era!ion

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$. moun! !'e engine #rame se%urel, !o !'e 'ull !o +re en! s'a#! %ou+ling misalignmen!

(. %onne%! !'e %ross'ea" soli"l, !o !'e +is!on ro"

1. (he fall in speed that occurs in a diesel engine e

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. re"u%e %orrosion in !'e 'ea!ing %oil

$. +re en! %logging an" erosion in !'e %oil

(. main!ain ero wa!er 'ar"ness

*. What does the @ - number of a grease indicate?

A. 'e o*i"a!ion resis!an%e o# !'e grease

. 'e %onsis!en%, o# !'e grease i.e 'ow #lui" or non #lui"

$. (emulsibili!, o# !'e grease

(. 'e s'el# li#e o# !'e grease

,. Which of the follo#ing layers of a thin shell bearing gives it its fatigue strength ?

A. 'e o erla,

. 'e in!erla,

$. 'e ba%&ing

(. 'e barrier la,er

. Which of the bearings listed is most #idely used for main and connecting rod bearings of modern

diesel engines?

A. S!eel-line"

. oure" babbi!! sel#-aligning

$. S+li! roller

(. re%ision inser!

. Which of the follo#ing statements is false?

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A. 'e #uel oil sul#ur le el is one o# !'e im+or!an! %ri!eria #or %'oi%e o# le el o# %,lin"er oil.

. 'e use o# an!i-+olis'ing rings or #lame rings in%reases !'e %onsum+!ion o# %,lin"er oil

$. )*%essi e %,lin"er oil #ee" %an lea" !o 'arm#ul "e+osi!s in +is!on !o+ lan" area

(. one o# !'e abo e

2. When preparing to light off a cold boiler e

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$. onl, #or a +ar! o# !'e %ir%um#eren%e a! rig'! angles !o !'e %ir%um#eren%e o# !'e liner

(. All aroun" !'e %ir%um#eren%e a! an angle almos! !angen!ial !o !'e %ir%um#eren%e o# !'e liner

2!. -f the tappet clearance bet#een the roc"er arm tappet and e+haust valve stem is e+cessive then)

A. 'e al e will o+en earl, an" %lose la!er

. 'e al e will o+en la!er an" %lose earl,

$. 'e al e will o+en an" %lose la!er

(. 'e al e will o+en an" %lose earl,

2$. -n order to reduce thermal loading on the upper part of the liner and increase the effectiveness of

cylinder lubrication5 modern !6stro"e marine diesel engines are designed to have)

A. $erme! %oa!e" +is!on rings bore %oole" liners an" uni#low s%a enging

. ig' !o+ lan" o# +is!on %rown an" "ee+er %,lin"er %o er wi!' !o+ lan" o# %rown e*!en"ing in!o

%,lin"er %o er a! ($

$. ow !o+ lan" o# !'e +is!on %rown wi!' bore %oole" %,lin"er liner

(. ore %oole" %,lin"er liner an" bore %oole" +is!on %rown wi!' !oroi"al s'a+e %ombus!ion %'amber

2'. Which of the follo#ing conditions can lead to reduced po#er developed by a main engine?

A. ig' s%a enge air !em+era!ure

. $'o&e" air su%!ion #il!er o# a !urbo%'arger

$. low +as! in one or more uni!s

(. All o# !'e abo e.

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2*. Which of the follo#ing types of diagrams #ould give an indication of effectiveness of e+haust and

scavenge processes?

A. ower %ar"

. (raw %ar"

$. ig'! s+ring "iagram

(. All o# !'e abo e.

2,. (he arrangement used to protect overheating of the superheaters under fluctuating loads is called

A. (e-su+er'ea!er

. A!!em+era!or

$. S!eam "um+ing al e

(. ee" 'ea!er

2 . 9iston rod stuffing bo+ scraper rings butt clearances should)

A. o! !o be allowe" !o #all below G0H o# original %learan%e

. o! !o be allowe" !o in%rease abo e G0H o# original %learan%e

$. o! !o be allowe" !o #all below manu#a%!urer re%ommen"e" alue

(. o! !o be allowe" !o in%rease abo e manu#a%!urer re%ommen"e" alue

2 . -n a !6stro"e engine a 7777777777777777 separates the under piston space from the cran"case.

A. A-#rame

. $ross'ea"

$. (ia+'ragm

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(. S%a enge s+a%e

22. Fusible plugs are installed in fire6tube boilers to

A. +ro i"e a means o# "raining !'e boiler

. warn !'e engineer o# low wa!er le el

$. %ool !'e %rown s'ee! a! 'ig' #iring ra!es

(. o+en !'e burnersB ele%!ri%al #iring %ir%ui!s

144. Which of the follo#ing gauges are generally used to evaluate main bearing clearances?

A. o&er gauge

. eeler gauge

$. eles%o+i% #eeler gauge

(. (ial gauge

141. -n a coil6type au+iliary #ater6tube circulation boiler

A. une a+ora!e" #ee"wa!er %olle%!s in !'e bo!!om o# !'e #las' %'amber

. all genera!e" s!eam is re%ir%ula!e" !'roug' 'ea!ing %oils in !'e boiler

$. 'ea!e" wa!er #las'es !o s!eam in !'e boiler 'ea!ing %oils

(. res+onse !o s!eam "eman" is slower !'an in a #ire-!ube boiler

14!. For a continuous operation diesel engine5 a duple+ filter unit #ould be the best arrangement because

A. %'anging #il!er elemen!s woul" no! in!erru+! engine o+era!ion

. #il!ering o%%urs !wi%e in ea%' +ass o# oil !'roug' !'e s,s!em

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$. %logging will no! o%%ur

(. "ro++ing +ressure is 'al# o# !'a! !'roug' a single #il!er uni!

14$. As per regulations5 #ithin ho# many hours before each departure5 satisfactory #or"ing of the

steering gear must be chec"ed?

A. 2

.12

$. 24

(. one o# !'e abo e

14'. Modern '6stro"e medium speed5 marine diesel engine e+haust valve spindles are rotated by

providing

A. o le rings

. a++e! %learan%e

$. S+inners or anes

(. 5o!o%a+s

14*. (he purpose of economi;er is to)

A. (e%rease !'e %a+a%i!, an" si e o# !'e au*iliar, boiler

. $ooling "own !'e e*'aus! gases in or"er !o re"u%e O* emission

$. Allowing So* !o rea%! a! low !em+era!ures wi!' wa!er !o #orm a%i"s !'us re"u%ing So* emission

(. In%reasing !'e o erall e##i%ien%, o# !'e main +ro+ulsion +lan!

14,. Microbiological gro#ths in marine fuel are a common occurrence that can be

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A. e*!remel, "e!rimen!al !o e ui+men! an" o+era!ing +ro%esses

. +re en!e" b, main!aining +ro+er s!orage !em+era!ures

$. remo e" #rom emulsi#ie" #uel oil "uring !'e %en!ri#uging +ro%esses

(. All o# !'e abo e are %orre%!.

14 . (he function of the tie rods is to)

A. ee+ !'e engine %om+onen!s un"er !ension a! all !'e !imes

. =us! se%ure !'e engine +ar!s !oge!'er

$. A%! as 'ol"ing "own bol!s #or !'e be"+la!e an" &ee+s all !'e engine %om+onen!s !oge!'er

(. ee+ engine %om+onen!s un"er 'ig' %om+ression so !'a! !ensile s!resses a%!ing "uring #iring s!ro&e

"o no! e*%ee" !'is +re-%om+ression !o a oi" #a!igue #ailure

14 . Which of the follo#ing types of cran"shafts is much lighter at similar po#er re

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(. a%%umula!or +ressure

114. Fuels as produced in a refinery are generally sterile5 ho#ever5 contamination can occur as fuels are

A. s!ore" a! !'e re#iner,

. s!ore" on !'e essel

$. !rans+or!e" !o !'e "is!ribu!ion si!es

(. All o# !'e abo e are %orre%!.

111. Which of the follo#ing statements is false?

A. )*%essi e %,lin"er liner lubri%a!ion %an aggra a!e s%u##ing.

. Ese o# an!i +olis'ing ring re"u%es s%u##ing.

$. (ee+ 'oning o# liner #ails !o gi e an i"eal liner sur#a%e.

(. one o# !'e abo e

11!. -n a fully built or semi built type cran"shaft5 ho# can any slippage at shrin" fit be identified?

A. , ins+e%!ing !'e lo%&ing arrangemen! +ro i"e"

. , %'e%&ing !'e "owel +ro i"e".

$. , %'e%&ing !'e wi!ness mar& +ro i"e" #or re#eren%e .

(. , %'e%&ing !'e +er#orman%e o# !'e engine

11$. Which of the follo#ing is one of the ma>or advantages of resin cho"ing over cast iron cho"ing5 in

holding do#n arrangements of modern diesel engines?

A. e!!er ibra!ion "am+ing +ro+er!ies.

. e!!er %om+ressi e s!reng!'

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$. 100H %on!a%! no nee" #or sur#a%e +re+ara!ion

(. one o# !'e abo e

11'. -n a !6stro"e crosshead type of engine5 the side thrust generated due to rolling and connecting rod

and fore6aft thrust due to pitching motion of the ship is ta"en care of by the)

A. is!on an" !'e liner

. $onne%!ing ro" an" !'e +is!on ro"

$. $ross'ea" s'oes an" gui"es

(. $ran&+in an" !'rus! bearing

11*. -n a -( eer" type fuel pump)

A. 5aising !'e barrel "ela,s beginning o# inje%!ion

. owering !'e barrel "ela,s beginning o# inje%!ion

$. 5aising !'e barrel "ela,s en" o# inje%!ion

(. owering !'e barrel "ela,s en" o# inje%!ion

11,. (he over speeding of the diesel engine driving an electric generator could cause

A. low ol!age !ri+ !o !ri+

. re erse +ower !ri+ !o !ri+

$. "amage !o win"ings

(. e*%essi e e*'aus! !em+era!ures

11 . -n a large5 slo#6speed5 main propulsion diesel engine5 #hich of the parts listed is under tension #hen

the engine is running?

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A. e" +la!e

. $olumn

$. )n!abla!ure

(. ie ro"

11 . A diffuser is provided at the end of a mechanical atomi;er in boiler onboard

A. o +re en! blow ba%& o# !'e #lame

. o mi* !'e air an" #uel +ro+erl,

$. o +re en! blow ou! o# !'e #lame

(. o eje%! !'e e*%ess #umes #rom !'e a!omi er

112. &team stop valve is eased of its seat during boiler start up from cold

A. o allow !'ermal e*+ansion o# +ar!s

. o allow s!eam #low "uring s!ar! u+

$. o +re en! wa!er 'ammer

(. All o# !'e abo e

1!4. Which of the follo#ing statements about the design of D6 type boilers5 is false ?

A. 'e 'ea ier wa!er in !o+ "rum #lows ba%& !o !'e bo!!om "rum !'roug' !'e "own- %omers ou!si"e !'e

#urna%e

. Insi"e !'e #urna%e !'e wa!er is 'ea!e" u+ in !'e risers

$. 'e u++er "rum is !'e s!eam?wa!er "rum an" !'e lower one is !'e wa!er "rum.

(. 'e #ee" wa!er is +um+e" in!o !'e lower "rum

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1!1. 9resence of catalytic fines in fuel oil is significant to engineers on board because

A. $a!al,!i% #ines !en" !o im+air +ro+er o+era!ion o# +uri#iers

. $a!al,!i% #ines lea" !o abrasi e wear in liners +is!on rings an" #uel inje%!ion e ui+men!

$. $a!al,!i% #ines ne%essi!a!e in%rease in inje%!ion !em+era!ure

(. $a!al,!i% #ines ne%essi!a!e in%rease in s!orage !em+era!ure

1!!. With reference to the data logger for a refrigerate sys. Which of the parameters should be noted?

A. Sea wa!er !em+ +ressure

. $on"enser !em+

$. 5e#rigeran! lea&age

(. ) a+ora!or !em+.

123. >'i%' o# !'e #ollowing #a%!ors a##e%! +ene!ra!ion o# #uel "ro+le!s "uring inje%!ion/

A. Juali!, o# a!omi a!ion

. Inje%!ion !em+era!ure

$. S%a enge air +ressure

(. All o# !'e abo e.

124. ube oil +um+s !a&ing su%!ion #rom !'e sum+ o# mos! small marine engines are usuall,

A. o# !'e "ia+'ragm !,+e

. o# !'e %en!ri#ugal !,+e

$. +osi!i e "is+la%emen! !,+e

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(. in"e+en"en!l, "ri en b, ele%!ri% mo!ors

12G. eles%o+i% +i+es !o !'e +is!on o# a large slow-s+ee" main +ro+ulsion "iesel engine are "esigne" !o +re en!

A. e*%essi e %ran&%ase +ressure

. e*%essi e lube oil !em+era!ure

$. %on!amina!ion o# !'e lube oil b, wa!er

(. %on!amina!ion o# !'e %ooling wa!er b, lube oil

126. )*%essi e a*ial !'i%&ness o# a +is!on ring %an lea" !o KKKKKKKKKKKKKKKKKKKK

A. S%ra+ing o## o# oil #rom liner sur#a%e

. In%rease" wear

$. wis!ing in !'e groo e

(. (i##i%ul!, in #orma!ion o# oil we"ge

127. >'i%' o# !'e #ollowing is an ///a"'esi e/// !,+e wear o# a %,lin"er liner/

A. $lo er- lea#ing

. S%oring

$. S%u##ing

(. O ali!,

128. $,lin"er 'ea"s o# marine "iesel engines are +ro i"e" wi!' KKKKKKKKK !o relie e an, e*%essi e +ressure

wi!'in !'e %ombus!ion %'amber

A. Sa#e!, al es

. In"i%a!or %o%&s

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$. 5elie# al es

(. urs!ing "is%s

1!2. Wor"ing of a pulse pressure turbocharger depends upon the 77777777777 that can be safely created

in the e+haust system.

A. )n!'al+, "ro+

. ressure "i##eren%e

$. urbo%'arger r+m

(. ressure +ulses

130. 'e ma*imum elonga!ion o# !iming %'ains in ser i%e is limi!e" !o KKKKKKKKKKK o# original %'ain leng!'.

A. 2H

. 1H

$. GH

(. 3H

131. (u+li%a!ion o# +ower uni!s #i!!ings an" +i+ings w'ere ea%' uni! is %a+able o# +ro i"ing 100H s!eering

+ower an" au!oma!i% isola!ion o# one uni! in !'e e en! o# a lea&age@single #ailure in !'a! uni! woul" %ons!i!u!e

100H re"un"an%, #or !'e s!eering gear s,s!em. Su%' s,s!em is man"a!or, on KKKKKKKKKKKK

A. All !an&ers

. an&ers abo e 10000 ;

$. an&ers abo e 100000 (w!

(. All s'i+s abo e

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132. 5ou!ine %leaning o# air si"e o# air %ooler o# main engine is "one b,:

A. $ir%ula!ing #res' wa!er

. $ir%ula!ing %ol" %'emi%al solu!ion

$. $ir%ula!ing warm %'emi%al solu!ion

(. $ir%ula!ing 'o! wa!er

133. >'a! +re en!s ro!a!ion an" #re!!ing be!ween a !'in s'ell bearing an" i!s 'ousing/

A. o%a!ion !angs or +egs

. 'e ni+ or %rus' o# !'e bearing

$. A s+e%ial &in" o# a"'esi e

(. An, o# !'e abo e

134. i%robial "egra"a!ion o# main engine sum+ oils %an lea" !o:

A. In%rease" %logging o# lube oil #il!ers

. $orrosi e a!!a%& on journals an" bearings

$. orma!ion o# s!able emulsions

(. All o# !'e abo e.

13G. In %ase o# %ons!an! +ressure !urbo %'arging !'e e*'aus! o# !'e %,lin"ers goes in!o :

A. Small "iame!er e*'aus! +i+es wi!' e*'aus! grou+ing

. )*'aus! %om+ensa!ors

$. o les

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(. arge "iame!er +i+es

136. >'i%' o# !'e #ollowing is a limi!ing #a%!or in %,lin"er liner %ooling/

A. a*imum %ombus!ion !em+era!ure

. inimum liner !em+era!ure

$. )*'aus! !em+era!ure

(. (ew +oin! #or #orma!ion o# sul#uri% a%i"

1$ . Which of the follo#ing is not a conse

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$. 2GH

(. 30H

1'4. -n a naturally aspirated diesel engine5 the volume of air inta"e is directly related to engine

A. %om+ression ra!io

. al e si e

$. #uel +ressure

(. %,lin"er %learan%e olume

1'1. (#o important considerations for the proper lubrication of a diesel engine include5 the delivery of

the oil in sufficient amount5 and the

A. %e!ane number

. +our +oin!

$. is%osi!, !em+era!ure

(. uali!, o# !'e oil

1'!. What is material of impeller of a (: compressor ?

A. S!ainless s!eel

. il" s!eel

$. Aluminium sili%on

(. ron e

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1'$. 0ne of the ma>or disadvantages of constant pressure turbocharging over pulse pressure

turbocharging is )

A. 5e"u%!ion in s+e%i#i% #uel %onsum+!ion

. eng!'ening o# e##e%!i e s!ro&e lea"ing !o grea!er e*+ansion in engine

$. oor !urbo%'arging e##i%ien%,

(. Inabili!, o# !'e s,s!em !o o+era!e a! low loa"s an" slow res+onse "uring a%%elera!ion

1''. Friction5 engine #ear5 and oil consumption in a diesel engine are directly related to the

A. a%i"i!, o# !'e oil

. +our +oin! o# !'e oil

$. #las' +oin! o# !'e oil

(. is%osi!, o# !'e oil

1'*. -mproper maintenance of an automatic au+iliary boiler oil burner could result in

A. #uel +um+ #ailure

. #an mo!or #ailure

$. in%rease" #ee"wa!er %onsum+!ion

(. "e%rease" boiler e##i%ien%,

1',. (he effect of e+cessive tappet clearance is)

A. In%rease" engine e##i%ien%, as e*+ansion %an !a&e +la%e #or a longer "ura!ion an" less energ, was!e" wi!' !'e

e*'aus! gases

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. Cal e 'ammering %'ange in !iming o# e*'aus! wi!' more si"e !'urs! %ausing grea!er wear be!ween s!em an"

bus'

$. oss in %om+ression +oor %ombus!ion im+ro+er mi*ing o# #uel air an" gas lea&age "ue !o im+ro+er

%losing o# al e

(. urbo%'arger surging loss o# ro!a!ion o# al e s+in"le an" 'ig' e*'aus! !em+era!ures

1' . (he difference bet#een rotocap and spinners for rotating e+haust valve spindle is that)

A. 5o!o%a+s ro!a!e !'e al es w'ile %losing w'ile s+inners ro!a!e !'em w'ile o+ening

. 5o!o%a+s ro!a!e !'e al es w'ile o+ening w'ile s+inners ro!a!e !'em w'ile %losing

$. 5o!o%a+s ro!a!e !'e al es w'ile o+ening w'ile s+inners ro!a!e !'e al e #or !'e en!ire "ura!ion un!il al e is

sea!e"

(. S+inners ro!a!e !'e al es w'ile o+ening w'ile ro!o%a+s ro!a!e !'e al e #or !'e en!ire "ura!ion un!il al e is

sea!e"

1' . Most fuel in>ection no;;les are opened by

A. #uel oil +ressure

. a %am o+era!e" #ollower

$. a s+ring-loa"e" +ressure +la!e

(. !iming gears &e,e" !o !'e %ran&s'a#!

1'2. Which of the follo#ing is a electro6 hydraulic type steering gear

A. 5o!ar, Cane !,+e

. 5am !,+e

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$. o!' ro!ar, ane !,+e an" ram !,+e

(. one o# !'e abo e

1*4. Which of the follo#ing purposes is solved by a piston rod gland or stuffing bo+ ?

A. o +ro i"e an air seal be!ween s%a enge s+a%e an" %ran&%ase

. o +re en! ingress o# %ombus!ion +ro"u%!s unuse" %,lin"er lube oil "ebris e!% in!o !'e %ran&%ase

$. o +re en! %arr, o er o# sum+ oil in!o !'e %ran&%ase

(. All o# !'e abo e

1*1. Which of the follo#ing is a feature of &ul;er (ribo9ac" pac"age?

A. i" le el liner insula!ion

. (ee+ 'oning o# liner

$. re- +ro#ile" an" %oa!e" +is!on rings

(. All o# !'e abo e

1*!. -n #hich of the follo#ing steering modes5 rudder #ill be loc"ed at a particular angle until ne+t

manual order?

A. ollow u+

. Au!o +ilo!

$. on ollow u+

(. one o# !'e abo e

1G3. ailure o# !'e burner #lame in an au!oma!i% au*iliar, boiler woul" +robabl, be a resul! o#

A. wa!er in !'e #uel oil

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. bro&en 'ig' !ension lea"s

$. in%orre%! ele%!ro"e se!!ing

(. #ull #uel +ressure a! !'e no le

1G4. As +er regula!ions !'e !or ue %a+a%i!, o# a s!eering gear s,s!em s'oul" be su%' so as !o be able !o !urn !'e

ru""erKKKKKKKKKKKKKKKKKKKKKKKKKK

A. 3G "egrees one si"e !o 3G "egrees on !'e o!'er si"e a! ma*imum ser i%e s+ee"

. 3G "egrees one si"e !o 30 "egrees on !'e o!'er si"e a! ma*imum ser i%e s+ee"

$. 3G "egrees one si"e !o 3G "egrees on !'e o!'er si"e a! normal ser i%e s+ee"

(. 3G "egrees one si"e !o 30 "egrees on !'e o!'er si"e a! normal ser i%e s+ee"

1GG. 'e ou!+u! +ressure o# a "iesel engine lube oil +um+ is regula!e" b, a?an

A. relie# al e

. me!ering al e

$. ariable s+ee" +um+ "ri e

(. ori#i%e in !'e lube oil 'ea"er

1*,. Most (: have 66666666 flo# type of ompressor and 66666666flo# type of Rotor

a. $en!ri#ugal 5a"ial Im+eller a*ial

b. $en!ri#ugal a*ial Im+eller ra"ial

%. $en!ri#ugal mi*e" 5ea%!ion 5a"ial

". 5o!ar, a*ial 5ea%!ion 5a"ial

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1G7. a%!ors o# lower limi! o# !'rus! b, %learan%e

a. A"jus!men! o# %ran&s'a#!

b. o allow !'rus! +a"s !o !il! genera!e" oil we"ge

%. ro+er lubri%a!ion

1G8. use o# s,n!'e!i% +ol,mer !rea!men! limi!e" !o low +r boiler w',/

a. "oes no! 'el+ in +re en!ion o# s%ale #orma!ion

b. "oes no! 'el+ in %orrosion +re en!ion

%. "oes no! #orm +'os+'a!e !o !a%&le %aus!i% embr!llmn!

". all o# abo e

&% (-0@ !

FR0M D &/-99-@ 0 D 3%&(-0@

1. While an au+iliary boiler is operating at design load5 #hich of the follo#ing actions #ill occur if the

automatic combustion control system detects a steam pressure drop?

A= ore burners will be lig'!e" o##.

B= 'e regis!ers will o+en #ull,.

= 'e #uel oil al e an" air "am+er will o+en wi"er.D= 'e s!eam #low will be au!oma!i%all, regula!e".

!. A unit type fuel in>ector is used on a diesel engine to 7777777777777.

A=me!er !'e #uel

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B= +ro"u%e !'e +ro+er #uel oil +ressure

= a!omi e !'e #uel

D=all o# !'e abo e

$. With the help of e+planatory s"etches briefly state the lubrication system for a large ! stro"e slo#

speed marine diesel engine for the follo#ing.

A=%ams'a#! bearings

B= main bearings

= +is!on %ross'ea" bearings

D=%,lin"er walls

'. -f the valve tappets in a diesel engine are set at greater clearances than those specified by the engine

manufacturer5 those valves #ill 7777777777777.

A=o+en la!e an" %lose earl,

B= o+en la!e an" %lose la!e

= #ail !o o+en w'en !'e engine is %ol"

D=#ail !o o+en a! normal o+era!ing !em+era!ure

*. Regarding a Diesel engine cran"case5 the general arrangement and installation should preclude the

possibility of 77777777.

A=#ree en!r, o# air !o !'e %ran&%ase

B= wa!er en!ering !'e %ran&%ase w'ile engine was'"owns are being +er#orme"

= e*%essi e oil lea&age "uring +erio"s o# in%rease" blowb,

D=sub%ooling in!ernal %om+onen!s

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,. (he gro#th rate of microbiological organisms as found in some fuel supplies #ill 7777777777.

A= in%rease in "ire%! +ro+or!ion !o an in%rease in !em+era!ure

B= "e%rease i# blea%'es are a""e" !o !'e #uel on a regular basis

= remain un%'ange" +ro i"e" %om+le!e %onsum+!ion o# !'e #uel o%%urs mon!'l,

D=All o# !'e abo e

. Fuel in>ection pumps using the port and heli+ metering principle re

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B= o+ening sooner

= s!a,ing o+en #or a s'or!er +erio" o# !ime

D=s!a,ing o+en #or a longer +erio" o# !ime

11. What preventative maintenance should be done frea!%' !'e !em+era!ure !o +re en! #lu%!ua!ions in +ressure.

D=$lean !'e in!erior !o remo e oil an" #oreign ma!!er.

1!. Friction developing bet#een the moving parts of a governor5 governor lin"age and control valve #ill

cause the governor to 777777777.

A= rea%! wi!' insu##i%ien! s+ee" "roo+

B= #ail !o rea%! !o small s+ee" %'anges

= 'a e e*%essi e sensi!i i!, !o small s+ee" %'anges

D= remain in !'e neu!ral +osi!ion

1$. (o minimi;e corrosion5 fuel oil strainer dis"s5 spacers and scraper blades are made of 7777777777777.

A= brass

B= %o++er

= iron

D=monel me!al or s!ainless s!eel

1'. -n a diesel engine5 ma+imum lube oil system pressure is normally controlled by 7777777777777.

A= !'e %a+a%i!, o# !'e lube oil +um+

B= !'e s+ee" o# !'e lube oil +um+

= !'e ou!le! +ressure o# !'e lube oil +um+

D=a relie# al e

1*. Which of the follo#ing statements describes the function of an e+pansion tan" in a diesel engine

cooling system?

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A= ain!ains a %ons!an! 'ea" on !'e s,s!em.

B= 5e"u%es !'e li&eli'oo" o# air or s!eam +o%&e!s #orma!ion.

= ro i"es a low +ressure +oin! #or !'e a""i!ion o# ma&eu+ %ooling wa!er.

D=All o# !'e abo e.

1,. Within the cycle of a forced circulation au+iliary #ater6tube boiler5 part of the #ater flashes into

steam5 and the remaining hot #ater is 77777777777777777.

A=%olle%!e" in !'e lower +or!ion o# !'e s!eam a%%umula!or #or re%ir%ula!ion ba%& !o !'e 'ea!ing %oil

or wa!er !an&

B= re!urne" !o !'e lower "rum ia "own%omers "ue !o "ensi!, "i##eren%e #or re'ea!ing

= +asses !'roug' !'e "omes!i% 'ea!ing s,s!em re!urn line s!eam !ra+s !o !'e au*iliar, #ee" su++l,

!an&

D=au!oma!i%all, "um+e" in!o au*iliar, #ee" 'ea!er an" re'ea!e" b, au*iliar, e*'aus! ba%& +ressure

1 . -gnition failure in an automatically controlled au+iliary boiler could be caused by 7777777777777.

A=%arbon "e+osi!s on !'e #lame s%anner

B= 'ig' #uel oil !em+era!ure

= low #uel oil is%osi!,

D= 'ig' s!eam +ressure

1 . Which of the fuel in>ection systems listed uses a spring loaded differential spray needle valve and an

individual pump for each cylinder?

A=$ommon-rail inje%!ion

B= Air inje%!ion

= =er& +um+ inje%!ion

D= (is!ribu!or inje%!ion

12. (he interior of some diesel engine salt#ater heat e+changers are protected from corrosion by the use

of 7777777777.

A=aluminum +la!es

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B= lea" %a!'o"es

= %o++er ba##le +la!es

D=sa%ri#i%ial in%s

!4. (he amount of chloride content in the #ater of an au+iliary boiler can be reduced by 777777777777.

A=a""ing ',"ra ine

B= blowing "own !'e boiler

= a""ing +'enol+'!'alein

D=a""ing a sul#i!e %'lori"e s%a enger

!1. ooling #ater pumps driven by direct reversing diesel engines are usually of the straight impeller

vane type pump #ith a concentric housing to 777777777777.

a= +ro i"e %ooling wa!er #low w'en !'e engine is running ei!'er a'ea" or as!ern

b= +ro i"e !'e grea!es! +um+ e##i%ien%,

c= +re en! +um+ %logging #rom marine grow!'

d= +re en! %a i!a!ion a! !'e +um+ ou!le!

!!. (he lube oil cooler is located after the lube oil filter in order for 7777777777777.

A= !'e #il!er !o o+era!e more e##i%ien!l,

B= !'e lube oil %ooler !o be b,+asse"

= +osi!i e lube oil +um+ su%!ion !o be assure"

D=gal ani% a%!ion in !'e %ooler !o be minimi e"

!$. A very sudden rise in pressure during combustion accompanied by "noc"ing of the unit or detonation

usually occurs

a= ear !'e en" o# !'e +ressure rise a#!er igni!ion o# #uel %'arge.

b==us! be#ore !'e #uel %'arge is abou! !o igni!e.

c=Imme"ia!el, a#!er !'e uni! rea%'es +ea& +ressure an" be#ore igni!ion o# #uel %'arge.

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d=A! an, s!age o# !'e %ombus!ion +ro%ess.

!'. (he main reection system must fulfill are and state each one of the points

made above are true or false

@a a%%ura!e me!ering o# small amoun! o# #uel oil.

@b %on!rol o# uali!, o# #uel inje%!ion

@% +ro+er !iming o# !'e #uel inje%!ion

@" sele%!i e "is!ribu!ion o# !'e #uel in !'e %ombus!ion s+a%e.

. Ans : A $ @ 5E) an" ( @ A S)

!*. -n any marine diesel engine5 air movements inside a combustion chamber is very important.

enerally spea"ing5 air movement helps5 &tate #hich of the above points are true or false

@a !o "is!ribu!e !'e #uel

@b !o mi* i! wi!' air

@% !o %ool !'e %,lin"er liner

@" !o 'el+ in o+!imising liner lubri%a!ion

@e !o assis! %ombus!ion

@# !o re"u%e a#!er burning

@g !o re"u%e %ombus!ion !em+era!ures.

. Ans : All !rue

!,. &acrificial ;inc anodes are used on the salt#ater side of diesel engine heat e+changers to

7777777777777.

A= re"u%e ele%!rol,!i% a%!ion on 'ea! e*%'anger me!als

B= &ee+ 'ea! !rans#er sur#a%es s'in, an" %lean

= +re en! ra+i" a%%umula!ion o# marine grow!'

D= +ro i"e a +ro!e%!i e %oa!ing on 'ea! e*%'anger sur#a%es

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! . (he fuel supply system to an automatic au+iliary boiler5 #ill be automatically shutdo#n if the boiler

77777777777777.

A=salini!, is abnormall, 'ig'

B= s!eam "eman" is !oo 'ig'

= wa!er le el is abnormall, low

D=#ee"wa!er #low is low

! . (he cran"cases of many diesel engines are "ept under a slight vacuum to 7777777777777.

A= im+ro e #uel e%onom,

B= in%rease !'e air %'arge elo%i!,

= re"u%e !'e ris& o# e*+losion

D=all o# !'e abo e

!2. (he rate of cylinder lubricating oil metered to each cylinder of a large5 lo#6speed5 main propulsion

diesel engine is 77777777777777.

A= !'e same w'e!'er a! sea or "uring maneu ering

B= a"jus!e" "uring ea%' 'our o# o+era!ion w'ile a! %ons!an! 5

= 'ig'er a! sea !'an w'ile maneu ering

D= lower a! sea !'an w'ile maneu ering

$4. 0n a medium6speed main propulsion diesel engine5 the cran"pin or cran" >ournal bearings receive

lubricating oil from 7777777777777.

A=a s+in"le lubri%a!or

B= an oil je!

= in!ernal s+las'ing

D="rille" +assages in !'e %ran&s'a#!

$1. An au+iliary engine under load continuously fluctuates even #ith a steady load. (he fault you

diagnose could be o#ing to

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a=!'e uali!, o# #uel

b=!'e uali!, o# ser i%ing o# !'e go ernor in !'e las! +or!.

c=!'e su++l, o# %'arge air

d=!'e o er'aul o# #uel inje%!ors "one in !'e las! "e%arbonisa!ion

$!. -n any diesel engine closed fresh#ater cooling system5 the lo#est pressure e+ists at the 7777777777777.

A= ja%&e! wa!er ou!le!

B=%ooling wa!er +um+ ou!le!

='ea! e*%'anger ou!le!

D=e*+ansion !an& a!mos+'eri% en!

$$. (he main advantage of unit in>ectors over other fuel in>ection systems is 7777777777777.

@a 5e"u%ing !'e nee" o# !oo man, 'ig' +ressure #uel lines

@b !'eir rela!i el, low inje%!ion +ressures

@% re"u%e" wear o# s+ra, ori#i%es

@" !'e lessene" %'an%e o# #uel lea&s in!o !'e engine sum+

$'. ooling the inta"e air supplied to a diesel engine #ill 7777777777777.

A. re"u%e mean e##e%!i e +ressure

. "e%rease a erage %om+ression +ressure

$. "e%rease air %'arge "ensi!,

(. in%rease +ower ou!+u!

$*. When there is a flame failure in an automatically fired au+iliary boiler5 the 777777777777.

A. air su++l, is s'u! o##

B. #uel su++l, is s'u! o##

. wa!er #ee" is s'u! o##

D. sa#e!, al e li#!s

$,. ubrication for the main reduction gears used #ith diesel engines is usually supplied by 77

A. oil #rom !'e main engine sum+

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. an in"e+en"en! lube oil s,s!em

$. !'e s!ern bearing 'ea" !an&

(. !'e s!ern bearing sum+ !an&

$ . Which of the listed items should be secured before performing any maintenance on a solenoid

operated air start valve?

A. )le%!ri% +ower

. ube oil s!an"b, +um+

$. ,"rauli% swi!%'

(. o!or "rain

$ . What is to be installed on an internal combustion engine if its cylinder bore e+ceeds !44mm?

A. $ran&%ase a+or moni!ors

B. )ngine e*'aus! silen%ers

. $ons!an! +ressure !,+e !urbo%'argers

D. )*+losion relie# al es

$2. Which of the follo#ing actions should normally be ta"en during each #atch #hen the au+iliary boiler

is in operation?

A. $lean !'e #lame s%anner +'o!o%ell win"ow.

. Ins+e%! an" %lean all solenoi" al es.

$. i#! !'e sa#e!, al es b, 'an".

(. Ins+e%! #or oil or wa!er lea&s.

'4. %+cessive vibration of an automatically fired au+iliary boiler can be caused by 7777777777777.

A. air or wa!er in !'e #urna%e

B. %ombus!ion +ulses

. #uel oil +um+ #ailure

D. #lame #ailure

'1. A dirty atomi;er sprayer plate in the burner of an au+iliary boiler5 #ould be indicated by

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a. %arbon on !'e regis!er "oors

b. a "a ling w'i!e a!omi er #lame

c. #lu%!ua!ing +ressure in !'e win"bo*

d. an une enl, s'a+e" burner #lame

'!. (he highest pressure in any closed diesel engine fresh#ater cooling system is at the 77

a= ja%&e! wa!er ou!le!

b=e*+ansion !an& inle!

c='ea! e*%'anger inle!

d=%ooling wa!er +um+ ou!le!

'$. Which of the follo#ing statements describes the function of an alarm enunciator on an engine room

alarm panel?

a=An alarm %on"i!ion %auses a lig'! an" siren !o %ome on w'i%' remain on un!il !'e ma%'iner, is

se%ure".

b=A #las'ing lig'! %omes on #ollowe" b, an au"ible alarm. >'en an alarm a%&nowle"ge bu!!on is

"e+resse" !'e au"ible alarm is silen%e" an" lig'! s!a,s on.

c=An alarm %on"i!ion gi es an au"ible an" isual alarm signal bo!' o# w'i%' are se%ure" w'en !'e

alarm a%&nowle"ge bu!!on is "e+resse".

d=An alarm %on"i!ion %auses a #las'ing lig'! !o %ome on #ollowe" b, an au"ible alarm. >'en !'e

alarm a%&nowle"ge bu!!on is "e+resse" !'e warning lig'! is e*!inguis'e".

''. %+cessive lea"age and premature failure of valve pac"ing is a result of 777777777777.

@a o+ening a al e !oo ui%&l,

@b jamming a al e in !'e %lose" +osi!ion

@% low +ressure #lui" #low !'roug' !'e +i+eline

@" a s%ore" al e s!em

'*. (he purpose of a temperature sensing device installed in the stac" of a small automatically fired

au+iliary steam boiler is to secure the oil burner 777777777777777.

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A. in !'e e en! o# a #lame #ailure

. in !'e e en! o# a s!a%& #ire

$. w'en !'e wa!er le el rea%'es !'e %rown s'ee!

(. w'en !'e #ee" +um+ "is%'arge +ressure "ro+s !o a +rese! minimum

',. When a #aste heat boiler is installed in the e+haust of a main propulsion diesel engine5 the e+haust gas

bypass #ould be used 777777777777.

@a a! 'ig' loa"s !o +re en! o er'ea!ing

@b a! low loa"s !o +re en! %orrosion in !'e boiler

@% "uring +erio"s o# 'ig' s!eam "eman"

@" w'en !'e !urbo%'arger is in o+era!ion

It is desirable for an auxiliary boiler safety valve to pop open and reseat quickly to __________.

a= gi e warning !'a! e*%essi e boiler +ressure 'as been rea%'e"

b= +re en! wire "rawing o# !'e "is% an" sea!

c= +re en! al e +oun"ing

d= +ro i"e su##i%ien! blow"own

' . Which of the follo#ing statements is correct regarding grades of pipe?

@a S!ainless s!eel +i+e is manu#a%!ure" in #our general gra"es.

@b rass +i+e is manu#a%!ure" in !'ree %ommon gra"es.

@% $o++er +i+e is manu#a%!ure" in !wo %ommon gra"es.

@" 'e !erm Le*!ra s!rongL is normall, asso%ia!e" wi!' s%'e"ule 160 s!eel +i+e

' . (he cran"case of many diesel engines are "ept under a slight vacuum by the 77777777777777.

@A s%a enging a%!ion o# !'e +is!on

@ +is!on !,+e a%uum +um+ !a&ing su%!ion o## a "i##eren!ial manome!er

@$ glan" e*'aus!ing manome!er

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@( %ran&%ase e*'aus! #an

'2. ubricating oil systems for diesel engine >ournal bearings are usually lubricated by #hich of the

follo#ing types of lubricating oil systems?

@A S+las'

@ ;ra i!,

@$ ressure

@( ,+ass

*4. Which of the follo#ing conditions can cause above normal air temperature to develop in the inta"e

manifold of a four6stro"e:cycle5 turbocharged5 diesel engine?

@A $logge" air in!a&e #il!ers

@ is!on blow-b,

@$ A "e#e%!i e a#!er%ooler

@( aul!, e*'aus! al es

*1. When may the cran"case ventilation pipes or oil drain pipes of t#o or more engines be connected?

A= ro+ulsion engines un"er 1000 s'a#! 'orse+ower ma, s'are a %ommon %ran&%ase en! +ro i"e"

!'e oil "rains remain se+ara!e.

B= In mos! %ases i! is "esirable an" %os! e##e%!i e #or +ro+ulsion engines !o s'are a %ommon

%ran&%ase en!ila!ion an" moni!oring s,s!em.

= o in!er%onne%!ion ma, be ma"e be!ween !'e %ran&%ase en!ila!ion +i+es or oil "rain +i+es

D= one o# !'e abo e are %orre%!.

*!. Which of the follo#ing statements describes the unchec"ed gro#th of microbiological organisms

#ithin a fuel system?

A= 'e ",ing ba%!eria will %ause a %oa!ing !o be #orme" on !'e si"es o# !'e !an& !'ereb, "e%reasing

%orrosion.

B= 'e #uel in !'e !an& will loose i!s #lui"i!, soli"i#, an" be !'e %ause o# an e*+ensi e

remo al +ro%ess.

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= $orrosion o# arious me!al %om+onen!s will o%%ur "ue !o !'e #orma!ion o# ',"rogen sul#i"e gas.

D=All o# !'e abo e are %orre%!.

*$. -f the feed pump for an au+iliary boiler fails to deliver the feed #ater to the boiler5 the cause may be

@A 'ig' s!eam +ressure in !'e boiler

@ abnormall, 'ig' #ee"wa!er !em+era!ure

@$ abnormall, 'ig' boiler wa!er !em+era!ure

@( s!eam "eman" e*%ee"ing #ee" +um+ %a+a%i!,

*'. When lighting off an au+iliary boiler5 #hich of the problems listed could cause the burners to sputter?

A=$ol" #uel oil

B= ow #uel oil +ressure

= ow a!omi ing s!eam +ressure

D=>a!er in !'e #uel oil

**. Which of the follo#ing actions ta"es place in the control circuit of an automatically fired au+iliary

boiler #hen the desired steam pressure is obtained?

@a A !em+era!ure sensing "e i%e o+ens !'e %ir%ui! brea&er in !'e burner mo!or.

@b 'e 'ig' limi! %on!rol se%ures +ower !o !'e en!ire oil #iring s,s!em.

@% 'e s!a%& rela, a%!ua!es !'e low limi! %on!rol w'i%' brea&s !'e igni!ion %ir%ui!.

@" 'e s!a%& rela, se%ures +ower !o !'e 'ig' ol!age si"e o# !'e igni!ion !rans#ormer.

*,. eles%o+i% +i+es !o !'e +is!on o# a large slow-s+ee" main +ro+ulsion "iesel engine are "esigne" !o +re en!

KKKKKKKKKK.

@a e*%essi e %ran&%ase +ressure

@b e*%essi e lube oil !em+era!ure

@% %on!amina!ion o# !'e lube oil b, wa!er

@" %on!amina!ion o# !'e %ooling wa!er b, lube oil

* . Sub!ra%!ing !'e re!urn #low me!er rea"ing #rom !'e su++l, #low me!er rea"ing on a boiler e ui++e" wi!' a

re!urn #low #uel oil s,s!em "e!ermines !'e amoun! o# oil KKKKKKKKKKKK.

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A=%ir%ula!e" b, !'e s,s!em

B= burner !'roug'+u!

= re!urne" !o !'e se!!ler

D="is%'arge" #rom !'e +um+

&% (-0@ $

8A@3ARG !41$

1. (he color of the e+haust from a diesel engine should be

A. %lear

. 'a , lig'! brown

$. 'a , lig'! blue

(. 'a , lig'! gre,

!. -n >er" type large fuel in>ection pumps5 pulsations are absorbed by) A. 'e #uel +um+ resilien! #oun"a!ion

. 'e 'ig' +ressure +i+es

$. 'e s'o%& absorbers moun!e" on #uel +um+s

(. 'e s'o%& absorbers moun!e" on 'ig' +ressure +i+es

$. Which of the follo#ing can be a possible outcome of salt #ater contamination in fuel?

A. $a i!a!ion an" erosion o# #uel inje%!ion %om+onen!s.

. ig' !em+era!ure %orrosion in e*'aus! al es an" !urbo%'argers

$. Ens!able %ombus!ion

(. All o# !'e abo e

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'. (he #ater in a steaming au+iliary boiler should be tested daily for

A. "issol e" o*,gen

. %'lori"es

$. slu"ge

(. "issol e" ni!rogen

*. What fittings do you normally find in a main engine turbocharger prior to compressor inlet in the

air flo# path ?

A. re-#il!er an" "i##user

. re-#il!er silen%er an" "i##user

$. re-#il!er silen%er an" in"u%er

(. re-#il!er silen%er ibra!ion "am+er

,. 3nit of "inematic viscosity

A. %en!i+oises

B. %en!is!o&es

. $$AI

D. none o# abo e

. %+haust valve seat material

A. s!ainless s!eel

B. in ar

. nimoni%

D. in%ome

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. Drop in compression pressure #ith high scavange bo+ temp in a cylinder

A. la!e inje%!ion

. earl, inje%!ion

$. worn +is!on ring

(. lea&, e*' al e

2. Which of the follo#ing statements is true?

A. 'e 'ig'er !'e is%osi!, in"e* o# a lubri%an! !'e 'ig'er is !'e %'ange o# is%osi!, wi!' !em+era!ure.

. 'e 'ig'er !'e is%osi!, in"e* o# a lubri%an! !'e lower is !'e %'ange o# is%osi!, wi!' !em+era!ure.

$. Cis%osi!, in"e* is no! a measure o# a #lui"Bs %'ange in is%osi!, wi!' !em+era!ure.

(. one o# !'e abo e

14. -n case of cross scavenged engines )

A. 'e e*'aus! +or!s are lo%a!e" abo e !'e s%a enge +or!s an" !'e, o+en e er,!ime !'e +is!on rea%'es

near ($ an" near ($

. 'e e*'aus! +or!s are lo%a!e" below !'e s%a enge +or!s an" !'e, o+en e er,!ime !'e +is!on rea%'es

near ($ an" near ($

$. 'e e*'aus! +or!s are lo%a!e" abo e !'e s%a enge +or!s an" !'e, o+en e er,!ime !'e +is!on rea%'es

near ($

(. 'e e*'aus! +or!s are lo%a!e" below !'e s%a enge +or!s an" !'e, o+en e er,!ime !'e +is!on rea%'es

near ($

11. While overhauling a piston rod stuffing bo+5 if the butt clearance of scraper rings is found belo#

or near the minimum5 the correct remedial measure #ould be KKKKKK

A. o #ile !'e en"s o# !'e rings an" in%rease !'e %learan%e

. o renew !'e ring se! or #i! new lamellae

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$. o swa+ !'e lower rings wi!' !'e u++er rings

(. o renew a segmen! or !wo o# ring se! !o ob!ain !'e "esire" %learan%e

1!. -n a electro6 hydraulic steering gear5 the movement of actuator is created by KKKKKKKKKKK

A. S!ar!ing !'e mo!ors on bo!' +ower uni!s

. O+era!ing !'e isola!ing al es

$. S!ar!ing a! leas! one +ower uni! an" a%!ua!ing !'e "ire%!ion al es

(. S!ar!ing bo!' +ower uni!s an" a%!ua!ing !'e "ire%!ion al es

&% (-0@ '

1= Friction developing bet#een the moving parts of a governor5 governor lin"age and control valve #ill

cause the governor to

a 5ea%! wi!' insu##i%ien! s+ee" "roo+

b ail !o rea%! !o small s+ee" %'anges

% a e e*%essi e sensi!i i!, !o small s+ee" %'anges

" 5emain in !'e neu!ral +osi!ion

!= A large change in ambient temperature5 or using an oil of a viscosity different than the one

recommended by the manufacturer in a mechanical hydraulic governor5 #ill result in the need to ad>ust

the

a +ilo! al e o+ening

b %om+ensa!ing nee"le al e

% %om+ensa!ing s+ring !ension

" a%%umula!or s+ring !ension

$= Friction5 engine #ear5 and oil consumption in a diesel engine are directly related to the

A a%i"i!, o# !'e oil

b our +oin! o# !'e oil

% las' +oin! o# !'e oil

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( is%osi!, o# !'e oil

'= When the prime movers of t#o paralleled generators5 e

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" inje%!ors

2= (he total starting air capacity re

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1'= (he output pressure of a diesel engine lube oil pump is regulated by a:an

a relie# al e

b me!ering al e

% ariable s+ee" +um+ "ri e

" ori#i%e in !'e lube oil 'ea"er

1*= An increase in the air inlet manifold pressure of a diesel engine #ill result in a:an

a "e%rease in ma*imum %,lin"er +ressure

b in%rease in igni!ion lag

% "e%rease in #uel %onsum+!ion +er 'orse+ower-'our

" "e%rease in e*'aus! mani#ol" +ressure

1,= Ma+imum lube oil system pressure is normally controlled by

a !'e %a+a%i!, o# !'e lube oil +um+

b !'e s+ee" o# !'e lube oil +um+

% !'e ou!le! +ressure o# !'e lube oil +um+

" a relie# al e

1 = Which of the follo#ing statements is true concerning an oil cooler?

a 'e oil !em+era!ure is less !'an !'e %ooling wa!er !em+era!ure

b 'e oil +ressure is less !'an !'e %ooling wa!er +ressure

% 'e oil +ressure is grea!er !'an !'e %ooling wa!er +ressure

" 'e magne!s are ins!alle" !o remo e me!al +ar!i%les

1 = (he highest pressure in any closed diesel engine fresh#ater cooling system is at the H

a ja%&e! wa!er ou!le!

b e*+ansion !an& inle!

% 'ea! e*%'anger inle!

" %ooling wa!er +um+ ou!le!

12= oncerning diesel propelled vessels5 the astern po#er is to provide for continues operation astern

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a e ual !o !'a! a ailable #or a'ea" o+era!ion

b a! 70 +er%en! o# !'e a'ea" r+m a! ra!e" s+ee"

% w'ile un"erwa, an" un"er all normal %on"i!ions

" a! 70 +er%en! o# !'e a'ea" r+m o# a erage %on!inuous sea s+ee"

!4= Maintaining the lo#est possible scavenging air temperature at all times is not recommended due to

the possibility of the

a air %'arge "ensi!, be%oming !oo 'ig'

b +is!on %rown sur#a%es be%oming !oo %ol"

% #orma!ion o# e*%essi e uan!i!ies o# %on"ensa!e

" %om+ression +ressure being grea!l, re"u%e"

!1= (he nuts of main bearings5 connecting rod bolts and all other moving parts are to be secured by

a 'ar"ene" s!eel nu! lo%&s

b %o!!er +ins ma"e o# s+ring s!eel

% s+li! +ins or o!'er e##e%!i e means

" ',"rauli% nu!s as %ommonl, #oun" on large low s+ee" engines

!!= -f the valve tappets in a diesel engine are set at greater clearances than those specified by the engine

manufacturer5 those valves #ill

a o+en la!e an" %lose earl,

b o+en la!e an" %lose la!e

% #ail !o o+en w'en !'e engine is %ol"

" #ail !o o+en a! normal o+era!ing !em+era!ure

!$= 9roper lubrication of the main bearings is more easily obtained in a single acting four6stro"e:cycle

diesel engine than a single acting t#o6stro"e:cycle diesel engine because

a bearing +ressure in a #our-s!ro&e?%,%le single a%!ing "iesel engine is %on!inuall, re erse"

b bearing +ressure in a !wo-s!ro&e?%,%le single a%!ing "iesel engine is %on!inuall, re erse"

% !'e ma*imum bearing +ressure is 'ig'er in a single a%!ing !wo-s!ro&e?%,%le "iesel engine

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" !wo-s!ro&e?%,%le "iesel engines re uire more %om+li%a!e" lubri%a!ion +i+ing

!'= -ncreasing the valve clearance bet#een a valve stem and roc"er arm5 #ill result in the valve

a %losing la!er

b o+ening sooner

% s!a,ing o+en #or a s'or!er +erio" o# !ime

" s!a,ing o+en #or a longer +erio" o# !ime

!*= Which of the follo#ing conditions can cause above normal air temperature to develop in the inta"e

manifold of a four6stro"e:cycle5 turbocharged5 diesel engine?

a $logge" air in!a&e #il!ers

b is!on blow-b,

% A "e#e%!i e a#!er %ooler

" aul!, e*'aus! al es

!,= ooling the inta"e air supplied to a diesel engine #ill

a re"u%e mean e##e%!i e +ressure

b "e%rease a erage %om+ression +ressure

% "e%rease air %'arge "ensi!,

" in%rease +ower ou!+u!

! = Which of the follo#ing condition may need to be reduced #hen operating a large5 lo#6speed5 main

propulsion5 diesel engine at lo# loads?6

a Inje%!ion +ressures

b $on!rol air su++l, +ressure

% $ooling wa!er #low !'roug' a#!er %oolers

" ube oil !em+era!ure

! = 0ne function of the fuel pump delivery chec" valve is to

a +re en! %arbon "e+osi!s #rom #orming on !'e inje%!or no le

b 'el+ !'e inje%!or nee"le resea! wi!'ou! "ribbling a! !'e no le 'oles

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% +ro i"e a +rolonge" +ressure "ro+ in !'e 'ig' +ressure s!eel +i+ing !o !'e inje%!or

" ensure a #uel lea&o## be!ween !'e +lunger an" barrel w'i%' +ro i"es lubri%a!ion #or rela!i e mo emen!

!2= A closed fresh#ater cooling system is commonly used #ith marine diesel engines because the H

a nee" #or wa!er !rea!men! is elimina!e"

b %ooling wa!er !em+era!ure "i##eren!ial is grea!er

% %ooling wa!er +um+s are "ire%!l, re ersible

" ja%&e! wa!er !em+era!ure is more easil, %on!rolle"

$4= Fuel droplets in>ected into a diesel engine cylinder must have adeection in a diesel engine cylinder depends primarily on

a !'e si e o# !'e 'oles in !'e #uel no le

b !iming o# !'e +um+

% su++l, +ressure !o !'e +um+

" s'a+e o# !'e %ombus!ion %'amber

$$= Which of the follo#ing devices is normally provided to prevent oil starvation in a diesel lubrication

system utili;ing the Ifull flo#I principle?

a (u+le* s!rainer

b 'ree-wa, al e

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% ressure relie# b,+ass line aroun" !'e #il!er

" e%'ani%al s!raining #il!er

$'= A port6and6heli+ fuel in>ection pump having upper and lo#er plunger heli+es is designed to

a ar, #uel "eli er, an" re!urn +ressure

b ar, !'e beginning an" en"ing o# inje%!ion

% o+era!e wi!' resi"ual #uels onl,

" +ro i"e ma*imum #uel "eli er, ra!e

$*= 0ne advantage of hydraulic clutches over mechanical clutches in diesel engine installations is H

a !'e +ower is !ransmi!!e" a! er, 'ig' e##i%ien%, o# 60H

b !'e !orsional ibra!ions are !ransmi!!e" "ire%!l, !o !'e re"u%!ion gears

% ea%' %lu!%' 'as a se+ara!e oil glan" #or re erse o+era!ion

" no me%'ani%al %onne%!ion e*is!s be!ween !'e "ri ing an" "ri en elemen!s

$,= An individual in>ection pump is designed for variable beginning and constant ending of in>ection.

For diesel engines operating at constant speeds5 the start of in>ection #ill

a a" an%e as !'e loa" in%reases

b re!ar" as !'e loa" in%reases

% remain un%'ange" regar"less o# loa"

" alwa,s o%%ur a! !o+ "ea" %en!er

$ = (he amount of fuel in>ected in a particular time5 or degree5 of cran"shaft rotation is termed

a me!ering

b !iming

% ra!e o# inje%!ion

" ra!e o# "is!ribu!ion

$ = -n a normally operating diesel engine5 the main source of lubricating oil contamination in the

cran"case is a result of the H

a me!al +ar!i%les loosene" b, wear

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b air w'en no air %leaners are use"

% %on"ensa!ion o# wa!er wa+ors

" brea&"own o# !'e lubri%a!ing oil b, "ilu!ion

$2= 0n small diesel engines5 a noticeable decrease in the time interval bet#een the replacement of the

lube filter cartridge indicates H

a +is!on ring blow-b,

b "ir!, air #il!er

% e*%essi e oil +ressure

" e*%essi e oil !em+era!ure

'4= When the lo#er edge of the spiral begins to uncover the release port in a >er" pump5 the

a +um+ing %on!inues un!il !'e +lunger !ra els i!s #ull s!ro&e

b e##e%!i e +um+ing s!ro&e o# !'e +lunger en"s

% +res. "ro+s slowl, un!il !'e #ull s!ro&e is a!!aine"

" +lunger ro!a!es !o !'e ero "eli er, +osi!ion un!il ne*! s!ro&e

'1= &ome diesel engines are fitted #ith a thermometer in the cooling #ater outlet from each cylinder. -f

the cooling #ater temperature from all cylinders begins to rise above normal5 you should suspect H

a in%rease" blow-b, in all %,lin"ers

b in%om+le!e %ombus!ion in all %,lin"ers

% o erloa"ing in all %,lin"ers

" insu##i%ien! #uel "eli er, !o all %,lin"ers

'!= 9roper operation of the main engine reduction gear set re

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'$= (he duration of fuel in>ection developed by an individual port6and6heli+ fuel in>ection pump5 is

determined by the H

a !o!al +um+ s!ro&e

b +um+ +lunger "iame!er

% +lunger 'eli* angle

" e##e%!i e +um+ s!ro&e

''= Before starting a diesel engine using an attached lube oil pump5 the engineer should

a o+en !'e b,+ass line

b %u! in !'e lube oil %ooler

% +ressuri e !'e lube oil s,s!em

" !o+ o## !'e e*+ansion !an&

'*= A diesel engine using lube oil #ith too high a viscosity #ill e+hibit

a in%rease" s!ar!ing "i##i%ul!, in %ol" wea!'er

b in%rease" oil %onsum+!ion

% !'i%&ening a! 'ig'er o+era!ing !em+era!ures

" minimal #ri%!ion losses

',= -f the main propulsion diesel engine governor #or"s irregularly #ith a >er"ing motion5 a possible

cause can be6

a a s!i%&ing #uel %on!rol lin&age

b a mal#un%!ioning o erloa" %am

% an unlo%&e" o ers+ee" !ri+

" #loa!ing al es

' = During e+tremely cold #eather5 #hile starting an engine5 it turns too slo#ly and fails to start. (his

problem is most li"ely the result of

A ig' #uel oil is%osi!,

b ow #uel oil !em+era!ure

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% ig' lube oil is%osi!,

" )nergi e" glow +lugs

' = 9rolonged operation of a diesel engine #ith a closed cooling #ater system5 at lo#er than normal

designed temperatures can H

a in%rease +ower ou!+u!

b "e%rease lube oil is%osi!,

% elimina!e #uel &no%&

" %ause sul#uri% a%i" #orma!ion

'2= Which of the listed governor characteristics #ill greatly affect the load sharing relationship bet#een

paralleled diesel generators?6

a Sensi!i i!,

b ower

% S+ee" "roo+

" $om+ensa!ion

*4= An emergency diesel generator cooling system is e

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*!= 9re combustion chambers5 air cells5 and energy cells in high6speed5 small bore diesel engines all

serve to increase6

a #iring +ressure

b Igni!ion uali!, o# #uel

% #uel-air ra!io "uring %om+ression

" urbulen%e

*$=. Which of the follo#ing statements best describes the operational characteristics of an isochronous

governors?6

a !'e, are sui!able #or use on main +ro+ulsion uni!s

b !'e, s!ri e !o main!ain a %ons!an! engine s+ee" #or all alues o# s!ea", loa"

% !'e, %ause a +ro+or!ional "ro+ in engine s+ee" as !'e loa" is in%rease"

" !'e, 'a e +oor sensi!i i!, a! 'ig' 5 .

*'=. (heoretical perfect combustion in a diesel engine yields by6products of

a al"e',"es an" %arbon "io*i"e

b wa!er a+our an" %arbon mono*i"e

% ni!rogen an" %arbon mono*i"e

" wa!er a+our an" %arbon "io*i"e

**= ombustion "noc" can occur in the cylinders of a diesel engine under any condition permitting6

a a s'or!ene" igni!ion "ela, +erio"

b a lean #uel?air mi*!ure

% e*%ess #uel in !'e %ombus!ion %'amber

" ra+i" a+orisa!ion o# inje%!e" #uel "ro+le!s

*,= When e+essive fuel dilution is noted in the lube oil5 the oil should be6

a %en!ri#uge"M

b #il!ere"

% s!raine"

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,!=For a ! stro"e engine #ith e+haust valvesJ

a S%a enge al e %loses be#ore e*'aus! +or!s

b )*'aus! al es %lose be#ore s%a enge al es

% S%a enge an" e*'aus! al es %lose a! same !ime be#ore ($

" S%a enge an" e*'aus! al es %lose a! same !ime a#!er ($

,$= (he ma+imum amount of liner #ear occurs atJ

a !o+ o# liner

b 1? 3 "ownwar" #rom !o+ %en!re

% mi"wa,

" bo!!om o# liner

,'= Which of the follo#ing cannot be removed from fuel oil by centrifuging in the purifier and micro6

filtration

a so"ium

b aluminium an" sili%on

% ana"ium

" as'

,*=-n the preheater before purifier the recommended heavy oil preheat is6

a 8G$

b 98$

% 110$

" 120%

,,=For a M% #hich has a * micron fuel filter5 a homogeni;er omega fire = is usually fitted H

a be#ore !'e +uri#ier

b a#!er !'e +uri#ier

% a#!er !'e G mi%ron #il!er !o )

" be#ore !'e 'ori on!al %lari#ier

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, =For a main engine fuel system #hich has a * micron filter 5a super decanter is usually fittedJ

a be#ore !'e +uri#ier

b a#!er !'e +uri#ier

% a#!er !'e G mi%ron #il!er !o )

" be#ore !'e 'ori on!al %lari#ier

, =For lo# sulphur $ 4 cst fuels the (B@ of M% oil should be in the region ofJ

a 20

b 40

% 60

" 70

,2=3sing a M% oil of high (B@ can causeJ

a im+ro+er %en!ri#uging o# wa!er

b $al%ium la uer "e+osi!s on bearings

% slu"ge #orma!ion wi!' wa!er in ) sum+

" all o# abo e

4=When using a high (B@ M% G oil and suddenly the ship has to use lo# sulphur $ 4 cst /0 in the

M%5 due to &% A area entryJ

a re"u%e !'e #ee" o# )$D

b in%rease !'e #ee" o# )$D

% "o no! %'ange !'e #ee" ra!e

" in%rease !'e o# !'e )$D

1=M% scavenge air temperature is ad>usted by6

a %on!rolling !'e sea wa!er inle!

b %on!rolling !'e sea wa!er ou!le!

% &ee+ing ou!le! al e 100H o+en alwa,s.

" none o# abo e

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!=(he M% >ac"et FW cooling outlet temperature is6

a 80$

b 9G$

% G0$

" GG$

$=(he scavenge air high temperature set point for ! stro"e M% is

a 40$

b GG$

% 6G$

" 3G$

'= Gou see #hite smo"e coming from the M% funnel stac"5 this could be

a one or more %,lin"ers no! ge!!ing enoug' #uel

b !oo low %om+ression +ressure

% wa!er in #uel

" all o# abo e

*=(he cran" angles of a ! stro"e engine areJ

a 2 %,lin"er engine? 90 "egrees

b 4 %,lin"er engine? 60 "egrees

% 6 %,lin"er engine? 90 "egrees

" 4 %,lin"er engine? 90 "egrees

,= ran"case e+plosions of main engines can be due to6

a o er 'ea!ing o# )$$ oil

b +oor %on"i!ion o# liners? rings

% %ran&s'a#! ? !'rus! bearing #ailure

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" all o# abo e

=-f there is air in the fuel oil filter5 the compression and re e+pansion of air #illJ

a no! allow !'e #uel inje%!ion al e !o %lose

b no! allow !'e #uel inje%!ion al e !o o+en

% ma&es no "i##eren%e

" none o# !'e abo e

= Which of the bearings listed are most #idely used for the main and connected rod bearings of a

diesel engine?

a roller

b slee e

% +re%ision inser!

" nee"le

2= Which of the follo#ing methods is normally used to lubricate bearings in a small high6speed diesel

engine?

a s+las' lubri%a!ion

b +ressure lubri%a!ion

% sig'! #ee" lubri%a!ors

" me%'ani%al lubri%a!ors

4= -n a naturally aspirated diesel engine5 the volume of air inta"e is directly related to engine

a %om+ression ra!io

b al e si e

% #uel +ressure

" %,lin"er %learan%e olume

1= -n a bypass filtering system for a medium or high speed diesel engine5 the lube oil bypassing the

filter

a re!urns "ire%!l, !o !'e su%!ion si"e o# !'e +um+

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b re!urns "ire%!l, !o !'e sum+

% #lows !o !'e engine bearings

" #lows !'roug' a se%on"-s!age s!rainer re'ea!er an" re!urns !o !'e sum+

!= -n a diesel engine5 the main bearings are used bet#een the

a %onne%!ing ro" an" !'e %ran&s'a#!

b wris! +in an" !'e %onne%!ing ro"

% %ams'a#! an" !'e engine blo%&

" %ran&s'a#! an" !'e engine blo%&

$= /eat e+changers are most commonly found in a small au+iliary diesel engine

a #uel oil s,s!em

b go erning s,s!em

% air s!ar!ing s,s!em

" lube oil s,s!em

'= Multiple concentric valve springs are often used #ith diesel engine valves to

a enable resear%' an" "e elo+men! o# %am %on!our !o be sim+li#ie"

b o+era!e !'e al e gear w'ere !'e larger #or%e is re uire" bu! s+a%e limi!a!ions res!ri%! use o# a large

s+ring

% allow #or easier al e re+la%emen!

" enable a !o!al smaller al e s+ring #or%e !o &ee+ !'e al e !ig'! on i!s sea!

*= Which of the listed bearing installations is sub>ected to s#inging motion?

a %ran&s'a#! journal

b %ran&+in bearings

% wris! +in bearings

" !'rus! bearings

,= 0ne advantage of vacuum feed type cylinder lubricators over the li

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b a"jus!men! is no! re uire"

% be!!er me!ering a%%ura%,

" a lower gra"e o# oil ma, be use"

= ooling #ater pumps driven by direct reversing diesel engines are usually of the straight impeller

vane type 6pump #ith a concentric housing to

a +ro i"e %ooling wa!er #low w'en !'e engine is running ei!'er a'ea" or as!er

b +ro i"e !'e grea!es! +um+ e##i%ien%,

% +re en! +um+ %logging #rom marine grow!'

" +re en! %a i!a!ion a! !'e +um+ ou!le!

= Motor vessels usually have an independent lube oil system each for the main engine and main

reduction gears because

a %oolers are no! nee"e" #or !'e gear s,s!em

b %on!aminan!s +ro"u%e" b, !'e engine %oul" 'arm !'e re"u%!ion gears

% non a""i!i e oils are use" in !'e main engine s,s!em

" "i##eren! !,+e %en!ri#uges are re uire" #or !'e main engine an" re"u%!ion gear lube s,s!ems

2= Which of the bearings listed is most #idely used for main and connecting rod bearings of modern

diesel engines?

a S!eel-line"

b oure" babbi!! sel#-aligning

% S+li! roller

" re%ision inser!

24= Dir4ectional inta"e ports in diesel engines are used to

a re"u%e air %'arge !urbulen%e

b in"u%e air swirl

% "e#le%! 'o! %ombus!ion gas awa, #rom !'e al es

" o++ose !'e e##e%!s o# +is!on in"u%e" s uis'

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" !wo engine "ri en lube oil +um+s %a+able o# +arallel o+era!ion

2,= -ntegral #ater >ac"et liners use 06rings near the bottom of the liner5 these 06rings serve to

a #orm a wa!er seal be!ween !'e liner an" engine blo%&

b allow #or slig'! misalignmen! o# !'e liner

% +re en! !'e es%a+e o# lubri%a!ing oil #rom !'e %ran&%ase

" ensure +ro+er !em+era!ure #low be!ween !'e liner an" engine blo%&

2 = (elescopic pipes to the piston of a large slo#6speed main propulsion diesel engine are designed to

prevent

a e*%essi e %ran&%ase +ressure

b e*%essi e lube oil !em+era!ure

% %on!amina!ion o# !'e lube oil b, wa!er

" %on!amina!ion o# !'e %ooling wa!er b, lube oil

2 = A characteristic of a bearing material #hich permits small dirt particles to become embedded in the

surface Kis

a "esirable as i! will +re en! "amage !o !'e journal sur#a%e

b "esirable as i! will assis! in &ee+ing !'e lube oil #il!ers %lean

% un"esirable sin%e !'e embe""e" +ar!i%les will s%ore !'e journal

" un"esirable sin%e !'e +ar!i%les will in!er#ere wi!' lube oil #low

22= Most fuel in>ection no;;les are opened by

a #uel oil +ressure

b a %am o+era!e" #ollower

% a s+ring-loa"e" +ressure +la!e

" !iming gears &e,e" !o !'e %ran&s'a#!

144= Which of the follo#ing devices controls the discharge flo# rate of an attached5 positive

displacement5 rotary gear5 diesel engine5 lube oil pump?

a A +ressure regula!ing al e

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b A +ressure relie# al e

% 'e engine s+ee"

" An ori#i%e

141= (he e+pansion tan" for a diesel engine closed cooling system is designed to maintain a constant

head on the system and

a re"u%e wa!er !em+era!ure

b re"u%e wa!er !urbulen%e

% +ro i"e an air %us'ion

" allow #or an in%rease in wa!er olume as !'e engine warms u+

14!= (o minimi;e corrosion5 fuel oil strainer dis"s5 spacers and scraper blades are made of

a brass

b %o++er

% iron

" monel me!al or s!ainless s!eel

14$= Which of the follo#ing statements describes the function of an e+pansion tan" in a diesel engine

cooling system?

a ain!ains a %ons!an! 'ea" on !'e s,s!em

b 5e"u%es !'e air %o%& w'en #ires are lig'!e"

% ro i"es a low +ressure +oin! #or !'e a""i!ion o# ma&eu+ %ooling wa!er

" All o# !'e abo e

14'= 0n a large diesel engine installation5 cran"shaft a+ial alignment is maintained by the

a +is!on ro" gui"es

b engine !'rus! bearing

% %ross'ea" bearing

" main s'a#! #le*ible %ou+ling

14*= &cavenging in a four6stro"e:cycle diesel engine occurs during the

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114= 9assages are drilled in the cran"shafts of diesel engines to provide lubricating oil to the

a main bearings

b %onne%!ing ro" bearings

% +is!on +in bus'ings

" All o# !'e abo e

111= (he outlet from an e+pansion tan" of a closed fresh#ater cooling system should be piped to the6

a %,lin"er 'ea" wa!er ou!le! 'ea"er

b %,lin"er ja%&e! inle! main

% 'ea! e*%'anger inle! %onne%!ion

" ja%&e! wa!er +um+ su%!ion line

11!= (he inta"e valves in diesel engine are reseated by

a %am #ollowers

b +us' ro"s

% %ombus!ion gases

" al e s+rings

11$= &mall amounts of moisture are necessary to trigger the gro#th of microbiological organisms found

in some marine fuels. &ome sources of #ater contamination are

a !an& sur#a%e lea&age

b 'umi"i!, an" %on"ensa!ion

% im+ro+er !an& was'ing +ro%e"ures

" All o# !'e abo e

11'= (he main function of tie rods in the construction of large5 lo# speed diesel engines is to

a s!i##en !'e be"+la!e in wa, o# !'e main bearings !o in%rease !'e engineMs longi!u"inal s!reng!'

b a%%e+! mos! o# !'e !ensile loa"ing !'a! resul!s #rom !'e #iring #or%es "e elo+e" "uring o+era!ion

% moun! !'e engine #rame se%urel, !o !'e 'ull !o +re en! s'a#! %ou+ling misalignmen!

" %onne%! !'e %ross'ea" soli"l, !o !'e +is!on ro"

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11*= 0n most modern diesel engines5the main