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After maintaining correct discharge pressure , soon ceases to discharge water what are possible cause?A. Pressure gauge wrongB. Pump sucking airC. Discharge valve throttledD. Casing wear ring is worn

Question 2Which of the following can lead to premature failure of roller bearings?A. MisalignmentB. ContaminationC. ShrinkageD. Over greasing

Question 3 Time Remaining:Vacuum priming pumps which work on the principle of fixed vane pumps require_____________ for___________ clearance between vane tips and casing.A. Lube oil, lubricatingB. Lube oil, sealingC. Water, sealingD. Gland packing, sealing

*Question 4

Increasing the rotational speed of a cargo pump the pump flow rate will:A. Increase in direct proportion to the increase in speedB. Decrease in direct proportion to the increase in speedC. Flow rate doesn???t depend upon speedD. Flow

Question 5 Time Remaining:The flow rate through a F.O. transfer pump will not be affected by which of thefollowing factors?A. Low F.O. temperatureB. Low sounding in F.O. tankC. Internal leakage within the pumpD. Leaking discharge valve

Question 6Which of the following can be done to reduce the cold corrosion of Main Engine cylinder liners using high sulphur fuel oil :-A. Increasing cylinder oil feed rateB. Using high TBN cylinder oilC. Increasing scavenge air temperatureD. Decreasing cylinder oil feed rate

Question 7Which of the following valves are designed to have valve seat in pairs -one facing the inlet side and the other facing the outlet side within the valve

body?A. Butterfly valveB. Ball ValveC. Globe ValveD. Gate Valve

*QuestionThe size of solid particle contaminants in hydraulic systems is measured in:A. Millimeter cubedB. Nano-millimeter

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C. MicronsD. Micro millimeter

*Question 9In Impressed Current Cathodic protection system , the current for cathodic protection is supplied by :A. Use of sacrificial anodesB. A low voltage D.C. supplyC. A low voltage A.C. supplyD. 110 V A.C. supply

Question 10Which of the following can lead to short cycling or frequent cutting in and cutting out of a fridge compressor?A. Dirty condenserB. Air entrapped in refrigerantC. High cooling water temperatureD. Grossly insufficient charge

*Question 11The attached vacuum pump of a ballast pump operates on the principle of a:A. Centrifugal pumpB. Reciprocating pump

C. Gear PumpD. Vane Pump

Question 12After cleaning the sea chest filter you have placed the filter in the body and tightened the cover.Which one of the following is the best alternative?A. You can open the filter inlet and outlet valves & directly start using the filterB. If you do not want to use the sea chest in question, you need not worry and you can open the valves when required

C. Sea Water inlet valve should be crack opened, the filter body should be purge

d, any leakages and thereafter filter can bekept isolated or used as requiredD. You will close the other side sea chest valves first and then open this sidesea chest filter inlet and outlet valves

*Question 13The suction pressure gauge of the Engine room bilge pump is broken and you don???t have a spare.Chief Engineer has asked you to troubleshoot the problem with Bilge pump not taking suction from Fwd.(P) bilge well.You try taking suction from Fwd. (S) & Aft Bilge well and find that pump is taking good suction.

Thereafter you trysuction from Fwd. (P) bilge well for sometime after priming with Sea Water but there is no change in level.You inspect the suction filter of the pump and find that it is very difficult toremove the same,you had to apply too much of force to lift the filter cover while normally it comes out easily. What does it indicate?A. It does not indicate anything, sometimes the filter covers are difficult to remove.B. It indicates that the suction valve of the Fwd. Bilge Pump is leakingC. It indicates that the suction filter of the Fwd. (P) bilge well is clogged co

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mpletelyD. Pump suction filter might be clogged

*Question 14Process of enrichment of surface of steel and and steel alloys by zinc using Electroplating is known as

A. CathodisationB. GalvanisationC. NeutralisationD. Dezincification

Question 15Which of the following statements is False about cleanliness of electric motors?A. External motor body cleanliness of totally enclosed is important since the body helps to dissipate heat generatedB. Dirt, oil, grease and moisture are primary culprits in deterioration of insulation of stator windings of a motor.C. High-pressure dry compressed air cleaning is preferred over suction cleaningfor stator windings.D. Dry compressed air at a high pressure can drive in dirt inside windings instead of removing them.

*Question 16

In a Parallel-Gate type valve the sealing between the valve and the disc is provided by:

A. Appropriate tightening torque of the valve spindleB. Gate and valve seat have a taper and when tightened they will seal against each otherC. Either the seat or the disc Gate are free-floating, allowing upstream pressure to seal the seat and

disc against any unwanted leakageD. For a gate type valve the sealing is never perfect and they always allow someleakage

*Question 17Which of the following instruments is used to measure rudder carrier bearing wear down?

A. Poker gaugeB. Telescopic feeler gaugeC. Depth gaugeD. Trammel

uestion 18A ball valve was found leaking in service. Upon inspection it was found that thePTFE seat had worn out and was renewed.The valve stopped leaking in closed condition. How do think a ball valve provide

s perfect sealing?

A. The seat fitted is slightly smaller than the outer dimensions of the ball, thus providing interference fit when closedB. Either a floating seat is pressed onto trunnion supported ball by liquid pressure or floating ball is pressed onto the seatC. Ball is not exactly spherical and is shaped such that during closure the surface coming into contact with seat is of slightlybigger diameter providing sealingD. Seat is not exactly spherical, but slightly tapered so that during closure th

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e ball sits tightly on the seat

Question 19In case of tankers, the speed of cargo pumps is reduced while stripping, why?

A. To avoid cavitation of the pump as the NPSHa may fall below NPSHr if speed isnot reducedB. To avoid cavitation of pump as the NPSHa may rise above NPSHr if speed is notreducedC. To prevent the pump from overspeeding if it loses suctionD. Decreasing the speed increases the discharge head of the pump which is required to pump out the remaining cargo

*Question 20The purpose of an evaporator in the domestic refrigeration system is to

A. Transmit latent heat of evaporationB. Absorb latent heat of fusionC. Absorb latent heat of evaporationD. Transmit latent heat of fusion

*Question 21Which of the following can lead to sudden stopping of a diesel engine?

A. Air in fuel supply lineB. Water in fuel supply lineC. Obstruction in air filterD. Water in the air filter

Question 22Which of the following is an important requirement for proper functioning of sacrificial anode system :-

A. Good Insulation between anodes and ship???s hullB. Good electrical continuity between anodes and ship???s hullC. Providing protection of anodes from being painted over during hull painting

D. Presence of an insulating material between anode and the cathode

Question 23 :A thin layer of electrolyte trapped in a small pits on a metal surface , and remaining stagnant over a period of time ,may cause :A. ErosionB. Bimetallic corrosionC. Crevice corrosionD. Corrosion fatigue

Question 24 Time Remaining:Normally so called ???single screw pumps??? are used as sludge pumps in engine r

oom.What is the correct technical name of these pumps?A. Snake PumpB. Screw PumpC. Progressive cavity pumpD. Gerotor Pump

*Question 25 :Sherardising , Chromising and Calorising fall under which of the processes of metal coating application :

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A. Thermal sprayingB. ElectroplatingC. Diffusion coatingD. Metal cladding

Question 26 Time Remaining:In which of the following types of refractory failure, softening of the refractory bricks takes place due to presence ofsodium/vanadium in fuel?

A. SpallingB. CrackingC. Shrinkage crackingD. Slagging

Question 27 Time Remaining:In a Sea Water cooled J.C.W. cooler, the most common cause for loss in cooling efficiency of the heater is:

A. Scale formation on J.C.W. sideB. Mud/silt deposits on J.C.W. sideC. Scale formation on S.W. sideD. None of the above

Question 28 Time Remaining:You have to dismantle a F.O. heater for cleaning.You have closed both the inlet and outlet valves of the heater, both for F.O. &steam side.What will you do before you start opening up the heater?

A. There is nothing more to be done, if you know the valves are holding you canstraight away start opening the heater withoutwasting timeB. Drain the heater till pressure gauge reads zero and then start opening the heaterC. Drain the heater till F.O. stops coming out of the drain and then start openi

ng the heaterD. First open the vent valve and allow the heater to de-pressurize and then openthe drain valve to drain the contents of the heater

Question 29 Time Remaining:When running TWO centrifugal Pumps in parallel, Flow rate"Q" is increased.A. TRUEB. FalseC. May BeD. I Don't know

Question 30 Time Remaining:Surface preparation of steel surfaces , prior carrying out painting is important

because (choose the best alternative) :

A. Any rust and contaminant inclusions may cause local paint film breakdownB. Too much paint will be consumed if surface preparation is not carried outC. Surface will be very rough if proper surface preparation is not carried outD. Surface preparation deposits a chemical onto steel surface which reacts withpaint film and causes strong bonding

Question 31 Time Remaining:Cadmium coatings provide corrosion protection . Cadmium coatings are commerciall

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y carried out using which of the following methods :-

A. Metal SprayingB. Electro-platingC. Hot-dippingD. Metal diffusion

*Question 32 Time Remaining:During flooding of a dry dock the following items must be verified

A. All sea valves are operationalB. All overboard discharge valves are operationalC. Stern tube seal are operationalD. All of the above

Question 33 Time Remaining:The machinery which is usually tested first once the ship reaches a dry dock isA. Engine room craneB. Engine room liftC. Gantry crane for engine roomD. All of the above

Question 34 Time Remaining:

The most important control measure to prevent boiler tube failure is:

A. Use of proper refractory materialB. Proper maintenance of fuel burning equipmentC. Proper maintenance of boiler water conditionD. All of the above

Question 35 Time Remaining:Pump Start But Motor gets overloaded or Trip on overload.

A. Alignment is wrongB. Gland packing too tight

C. Worn out / Damaged ball bearingD. Cavitations existsE. All of the above

*Question 36 Time Remaining:The function of an accumulator on the discharge side of a reciprocating bilge pump is to:

A. Supply liquid even when the pump is not runningB. Dampen out the pressure pulses and smoothen the flowC. Increase the discharge pressure by storing liquid under pressureD. No such device is required to be fitted to modern bilge pumps

Question 37 Time Remaining:A recently completely overhauled Engine room bilge pump was working efficiently.Suddenly one day you find that the pump is not taking suction.You have tried priming with sea waterbut still the pump doesn???t take suction from any of the bilge wells or bilge tank.What could have gone wrong inside the pump? Choose the best alternative.

A. The bucket rings have worn outB. The suction or discharge valve must have worn out and started leaking

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C. The suction or discharge valve might be stuck in one position or some debrismighthave lodged itselfin between the valve and the seatD. Pump suction filter might be clogged

Question 38 Time Remaining:It is given that engine room bilge pump has suction manifold on which 3 valves are located.One valve for the 3 engine room bilge wells suction, another one for Bilge tanksuction andthe third one is for sea water suction.It is found that the Bilge pump is unable to take suction from any of the bilgewells,but is able to take suction efficiently from Bilge tank. What is the most probable cause?

A. Pump suction filter cover gasket leakingB. Suction filter cover gasket of one of the Bilge wells is leakingC. Bilge well suction pipeline leaking between individual bilge well valves andsuction manifold valveD. Bilge pump suction pipeline leaking between the manifold and the pumpQuestion 39 Time Remaining:Pump driven clutch type attached vacuum pumps are commonly used for priming ballast pumps and emergency fire pump.

What is the factor which de-clutches the vacuum pump from the pump clutch?

A. Low suction pressure acting against the spring loaded declutching pistonB. High suction pressure acting against the spring loaded declutching pistonC. Low discharge pressure acting against the spring loaded declutching pistonD. High discharge pressure acting against the spring loaded declutching piston

Question 40 Time Remaining:The ballast valve of the fore peak tank is located in the duct keel and cannot be opened or shut by remote operation.The valves of other tanks can be operated remotely without any trouble Which ofthe following will be the best practice?

A. Valve should be checked locally for troubleshooting without which it is difficult to find the exact problemB. The actuator must be defective and should be replaced with a new oneC. The control circuit is defective and the PCB should be replacedD. Shore assistance will be required in such cases

*Question 41 Time Remaining:In shell and plate type coolers, due to improper flow design or partial blockageof tubes may lead to high turbulence locally.This condition may lead to (choose the best alternatives):

A. Bimetallic corrosionB. Selective phase corrosion

C. ErosionD. Impingement corrosion

*Question 42 Time Remaining:You must have used reinforced rubber joints. The reinforcement is normally provided using non-asbestos fibres.The reinforcement is provided because

A. Ordinary rubber gasket have a porous matrix, having capillaries which can all

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ow liquid leakage when subjected to high pressureB. To increase the load carrying capacity of joint so it can withstand higher pressuresC. To increase the temperature resistance of the jointD. To protect the joints from fire or other accidental damage

*Question 43 Time Remaining:The common term used for failure of metal and alloys in a corrosive environment, when subject to high stresses is known as :

A. Fatigue failureB. Corrosion fatigueC. Stress corrosion crackingD. Fretting Corrosion

Question 44 Time Remaining:Wheel operated butterfly valves are operated through a reduction gearbox.The Gear arrangement inside of gear box is of _________ type

A. Bevel GearB. Rack & Pinion GearC. Planetary GearD. Worm & Worm Wheel

*Question 45 Time Remaining:Cladding is the process used for :-

A. Protection of metal surfaces against corrosionB. Protection of metal surfaces against erosionC. Protection of metal surfaces against cavitation erosionD. Protection of metal surfaces impingement corrosion

Question 46 Time Remaining:A sea chest filter has to be cleaned. Which one of the following best practice should be followed prior opening the filter?

A. Close inlet & outlet valves of the filter before opening the filterB. Close inlet & outlet valves of the filter, then open the vent to release pressure before opening the filterC. Close inlet & outlet valves of the filter before opening the filterD. Put the other sea chest into use, isolate the filter by closing inlet & outlet valves,purge the filter body to depressurize it and then open up slowly

Question 47 Time Remaining:It has been reported that Engine room bilge pump was unable to take suction fromFwd. (P) bilge wellwhile it taking suction efficiently from Fwd.(S) & aft bilge wells. What could

be the most probable cause?

A. There is leakage in the bilge suction pipeline somewhere between the bilge wells and bilge pumpB. The Fwd. (P) bilge well suction valve might be leakingC. The Fwd. (P) bilge well suction filter cover gasket might be leakingD. The pump needs to be overhauled

*Question 48 Time Remaining:Which of the following is a correct point for sampling of system lube oil for on

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board or shore analysis?

A. StandpipesB. Purifier outletsC. Inlet or outlet of L. O. coolersD. Tank drains

Question 49 Time Remaining:Chromium is a nobler metal when compared to that of steel .In some marine applications Chromium is electroplated to the steel surfaces . Why?

A. Chromium is a more noble metal so it will not get corroded and thus steel surfaces will remain protectedB. Chromium plating provides corrosion protection as well as high glossiness andhigh hardness for better wear resistance andreduced friction to the steel surfacesC. Chromium plating is required for providing high glossiness and high hardnessfor better wear resistance andreduced friction to the steel surfaces and not for corrosion protectionD. Chromium reacts with steel to form an alloy during electroplating which is corrosion resistant

Question 50 Time Remaining:Correct method of greasing a centrifugal pump bearing is:

A. To pump the grease until you feel high back pressure on the Grease pumpB. To pump the greasefor 3-4 pumping strokes of Grease pump for each bearingC. To pump the grease when the pump is stopped and drain any old grease at the same time by opening the drain plug,giving only 3-4 pumping strokes on Grease pump for each bearing. the drain plugshould then be replacedD. To pump the grease when the pump is running and drain any old grease at the same time by opening the drain plug,until all the old grease is removed and new grease starts coming out of the drai

n, repeating samefor each bearing.the drain plug should then be replaced

1.B,c 2.a 3.c 4.a 5.d 6.b 7.a 8.c 9.b 10.d11.d 12.c 13.c 14.b 15. 16.b 17.d 18.b 19.b 20.c21.a 22. 23.b 24.c 25.d 26.d 27.c 28.d 29. 30.a31.d 32.d 33.a 34.d 35.e 36.d 37.d 38.c 39.c 40.a41.d 42.b 43.b 44.d 45.a 46.d 47.a 48.c 49.b 50.c