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I.E.S. (OBJ ) 2005 I ot J6

MECHANICAL ENGINEERING J ~-=:==:::=J

2.

3.

~.

PAPER·II

The pmces~ or remo' mg the burrs or nash frorn n forged compoaent in. drop forging is called: a Swaging b. Performing c. Trimming d. Fenling Which of the foiiO\\ing marerinls is used in the manulacture of e,,tmsion no7..zles'l a. Grey cast •ron b Malleable cast iron c. While cast ~ron d. Nodular cast iron Match List t !Alloy) with List II (Ma.ror Constituent) and select the correct answer usillg ~1e c.ode given below ~Je L1st

LJsl l

A. Babbill B. lnvar C. Gw1 Metal D. Duraluruin List n I. Nickel 2. Tin and lead 3. Aluminum -t Copper

A B n. b. C,

d.

2

2

3

4

I

c D 3

2 3

2

Consider tbe loiJowmg statements nbour medium carbon steel:

lJ can be quench-hardened but not case-hardened

2 It cannot be quench-hardened but casehardening can be done.

3. It exhibits distinct yield point under tension test

s.

(>.

7.

x.

Wh1ch of the roUo" mg suuemenrs g• veJI abo,•e are corre(;t? a. I and 2

b. 2 and 3 c, I and3

d. I. 2 and 3 The eutectoid of carbon in Iron. above lower c.rit icnl temperature. when rooted, results in: a. Ferrite and austenite b. Ferrite and Cementite c. Cementite and austenite d. Ferrite. Cementite and austenite Constder the following suttements sbonl FCC and HCP crystal stmcture. I Both hove same coordination mtmber

and ntonuc packing fmctio•t 2. Bolh represent closeh· packed crystal

structure 3 Both structures are generated b~·

stak-ing of close packed planes on top of one another. but only tlte stuckmg sequence is different.

Which of the statements s•ven above are correct'! a. I and 2

b. 2 and 3 c. 1,2and3

d. l and 3 Tltcnnoplastic materials cannot be produced by · a, Injection modeling process b. Ex1rus•on process c. Blo" molding process d. Both (a) and (b) abol'e increases of rerri ~e phase in steel incmases. a. Streng~b

b. Hardness c. Ductility

d. Brit~eness

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1'-·l~t<>h Liolt I (Steel) with Ll$1 11 (Application) and select th~ correct nns\\er using the c:<ldc given bclu\\ the liots:

List r A. Mild $teel B. Tool steel

C. High carbon steel

D, Mediwu carbon steel List 11

L B>ll bcruing 2. Cold ci.Usels

3. Shaft •nd nxles 4. Rolled s teel sections

•• b. c. d.

A

2 4

1 4

13 c I 4

3 2

·' 4

1

0 ' ,

3 i\o$totupil1·ing is <:mployoo to oblllitt:

'" too•. martens tic stt'Uot.urc b. 100"~ bnintlic sU1lClW'I!

c. Stl"1o mar1en.s tic aud 50'' n bain itic ~tructurc

d. too· .. pcnrlitic so·ucturc

II. In M IL'l~igJlmcnt pmblom ha ving n f•cilitks and n jobs. wbnl i.~ tho number of pos•ible way• of making assignntetits?

12.

13.

U.. 1\ I

b. 1\l

c, 2o

d. t' A (i(l I '•plain carbon st~l h•s. approxiowtely;

"· 15° I) of pear :..nd 25•h·, of fen1ite b. 25~ .• or pearlite and 75% of fero·ite

c. 75°o ni' Cemenlite and 25% of ferrite

d. 75'\o of pe.;~rlite nnd 25~. of Cementite

Mntch l.ist I (.\lloy1ng Element) wit'h List II ( Ulfect on steel) •net select the coiTecl :mswtT usiug u,e code give-n below u,~

Lists: List I A. \ 'a.nadlum B. Molybdenum

('. S ilicon

l), Chromium

15.

16.

List n L. lnere.>JSC.. on<lur:tnc~ strength

2c Improves c.re~p properti<. .. 3. lncn:ascs .hnrdncM 4. lm:reases ratistanc..:: to

temper3lune ox:idJtiou

. \ 13 c D

•• 2 1 3 4

b. I :. 2 4

c. 2 I ~ 3

d. 2 -1 3

The B.C.C. ond H.C.I'. met. Is pl;ostk del'onnalion by:

3 . Slip

b. Twinning

c. Edge dislocation

ltig.h

ttndergo

d. Twinning in oomhrnotion with s lip.

If a , and E denote Ore c.rusltiug stn:ss rutd

\'Quug·, rnotlul~ for Ute material r)( •

colunm. then lite Euler fonnul• c•n be applied for determination of cropping load of a column made of this material only, if its $ lcndt;fllcs~ rntio i!':

a. rvtore than 11 ~

b. Leu thllll ;rJE I a

c. More lhon ~r' l: J

d. ( E ' Loss than ;r' -;; J

Benm A is simply ~upported at its ends and c.>rries udl of intensity w over its <ntirc l~ngtb. 11 is modt of st.ccl l1nvin,g Youug's modulus E. Dcmn B is cnn.tilcvcr :tnd carries • udl of intensil) ' \\ 14 over ib< entire k11gtb, II is m>rlc r)f' hr•s.• having Young's modulus E/'L TI1e two b<,.tn.s = of samu lengOt ~nd ltavc same cross­seclJOna l :ore<~. If t;r., ond a , d~note tJ,e

maximum bending stresses dtn'eloped in beams A and li. respectively. then which one of th~ following is 'cotTect?

-a. a ;. ' a !-=- 0

h. 0', ' a ,< 1.0

c. a -. a , LO

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d. rr.l cr• olcpc:ud.cm I he •h:ope of co<>s~­

scction

Consider the following •L'Itements:

1. Coriolis acc.:loraliou in " slou.:d b~ o oucchanil!m is alwsys perpcndicub1· Ia lhe direction of the slolled bar.

2. ln n 4·1ink noeohmism. the inst3ntaneou.• centre of rotation of the input link and output link alw~ys lie• on a slr.Jighllinu • long th~ couplor.

Wbidt ofthe statements !liven nbove islar" corr~t~/

n. J only

b. 2only

c. Botb land 2 d. Neither I nvr 2

18. W)oicb 11f the i'oJinwong ryre~ or ~ITQ<se• i~1•rc ' involved in tho wirec<Jruwin£ operation? ., Tcn$ ilc only b. Comprcssivo ool'y

c. A combination of ten~ilt and compressive stresses

d. A combination of tensile . .:.om1wt8sivc •nd ~hear >lrcss<:J<

19. l\lntch List I (Type offorging) wiUt List D (0pmtion) and sel<>cl tlte correct nnswer U..•ing. the elide givt::n below the L.isL<:

Li•t .I

A. Drop Forging

B. Pre"' Forging C. Upset Forging

D. RoU Forsing. List D

L Me1.31 is grip1>ed in tlu: dies aud l>l"eS$UI'c b ltpplicd on lbo healed etld.

2. Squo:c1.ing action 3. MeL'II is t>loced betwe.:n roUer. and

pushed

4. Repealed ltammt'f blows A B c D

•• 4 I 2 3 b ' •' l 4

c. 4 2 ' " cl. J 1 4

20.

21.

22.

2~.

3 of16 Tit~ complete phase recryst~lllsntlon nnd lme grain ~truciUre is obt:tined in casting. forging and rolled l>at'l< by: a. Recry•L,II isotion annealing b. NonMiizing c. Spheroidislng

d. :\ustenising )ybtoh LiSt I 11 ilh List II and sclecl the, COn'eCI onswer using the ccJ<Ie given below the I.isk J.lst l A. Transportation Prol>lem H. A•signmenl Problent

C. Dynami<> Problem D. PERT l.hlli

I. C1ilical Path

2. Swg.oCoach

3. Vogel's Approximate l\l<thotl

4. Hungarian Method

A B (' D

a. 1 J 4

b. 3 4 2 J

c. 2 ~ 3 d. 3 I 2 4

A tie fOI' leaving vori>bles m procedure itn11lie•:

•• Optimnlity

b. Cycling c. No~olution

d. l)egcneracy

simple

A c<>ntro l clwt is Cllt:oblished wi(h limil$ o ± 2 •~•nword trr\11'11 for Ullc in monitoring &:tniJlles of siz.e n "' 20. Assume the proc..--ss 10 be in control. What. is the likelihood ul n sample mcao follins outside the conlful lintils?

a. 97.7°o

b. 95.5°o c. ;~.s•.

d. 2-'"• 24. Which of the following M< needed •• the

lnput data for materiJ>a requlremenl plaooin~?

I. Weekly pi'Oduction schedule

2. Bill of material 3. Supp lier lead time

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-1. Mnrkot forecast Select tl1c cvrrect rutswer usitlg th~ cod~ given betow: a. 1.2and3

b. 1,3 and 4

c. I and -1

d. I ,2.3 nnd 4 25. In ABC analysis. A item require:

3. No safety stock b. Low safety stock c. Moderdtt! safety stock d. HJgb safety stock

26. The critical path of a network is d1e patl1 tltat

27.

28.

a. Takes Ute shonest lime b. Takes the longest time c. Has lhe minimum variance d. Has the ma.,imum variance In a ~mall engineot·lng pmject, for an activity the optimistic time i~ 2 minutes, the most likely time is 5 minutes and the pessimistic rime is 8 minutes. What is the expectt>d time of !he activity? a. I minutes b. 5 minul..:s c. 8 minutes d. IS mfnu1es What nre the key runctions of 3 mnster schedule? 1. To generate matdrinl and capacity

requirements 2. To maintain valid priorities 3. An ei'rective c;tp~city ut ilization 4. Planning the q!JJlnlity and Liming nf

output over lbc intermediate lime horizons

Select the correct answer using the codo given below: a. l.,2and3 h. 2,3 and ~

c. 1.3 and4

d. 1,2 and 4 29. Match List I (An Element of Jigs and

Fixhtres) with List II (Associating system) and selecf the correct answer using the code giveu below ~.e Lists: Lis t 1

30.

31.

32.

~ 111 Il l 1\. Bush B, Setting block C. Diamond pin D. V-block List II

I. Mill ing thmre

2. nuning fLxture 3. Radial location 4. Cyllndrical locatiott 5. Drill jigs

A l.l c D a. 5 4 J I b. 3 I :! 4

c. 5 3 4

d. 3 4 2 I Which one of ~1e following forecasting techn iques is most suitable for making long rnnge fon.~asrs? a. Time series analysis b. Regression analysis c. Expunential smoothing d. Mru-ket Surveys 111e rating life or a group of apparently ident icaJ ball bearings is defined as the number of revolutions or exceeded before the first e'•idence of fatigue crack by: a. I OO~u of the bearings of !he group b. 95% of~le bearings ofthegn>up c. 90% of !he bearings or !he group d. 66.66% of the bearings of the gmur

s,

.. ...

l'ig.ure gJven above sh<>ws a spring-mass syslcm 1vhcrc the mass m is lixed in between two springs of stiff nesses S, and S2. What is 1he equivalent spring stiffness? a. s,-s, b. s,+s, (.'.

SJ +S: s,s,

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34.

35.

36.

37.

The ubove ligure shows n cam with a circular profile. rolm[ng with a unifonn angular vclocit)' of w md!s. What is the nalure or displacement of the follower'/

a. Unilonn

h. Parabolic c. Simpl<' hannook

d. Cydoidal

\. ...

In the iigure given ubove. the link 2 rotates 81 an tutgular velocity of 2 radis. What is the nu,gniludc: 011 Coriolis accclc.rmiou ""' flllril'11ted by tho llnk ~·1

a. 0 b. 1).8 mls' c. (),24 m/s2

d. 0.32 m/s~ Which one of the following govemors is used to drive a gramophone? a. Wall govcnwr b. Porter goveroor

c. Pickering governor d. Hrlrtnell governor A Jlooks·s Joinl ls used to connect two:

a, Coplanar and non-parallel shaHs

h. Non-coplanar and non-parallel $hufls c. Coplruw and parnlld sbuiis

d. Non-coplanar and parallel shafts

A circular section rod ABC is li..xed 0 1 ends A nnd C. II is subj.,cteu ln torqtlc 'I at B. AB = 8(' = I nnd lhe polar moment of

38.

39.

-1().

:i oflb inertia of pon.ious AD and BC are :2 J and J respective!> . I r 0 is the moduJus ur rigid ity, what is Ou~ angle of twist m poUu !3?

a. 3GJ

b. 1'L l(i,j

1L c.

G.J

d. 2TL --GJ

Consider the loiiPwing statements: I. 'I he degree or· freedom for lower

kinematic pairs i~ always equal to one. :2. A baU-rutd-socket joint has 3 degrees

of freedom and is a higl1er kinematic pair

3. Oldh.am 's coupling mechanism has two prismatic pai'l·s and two revolute pairs.

Which of the statements given above is/are con·ect?

u. I. 2 and 3 b. 1 only c. 1 and 3

d. 3 only

Consider the fOI h'Wing Stat~mcnts:

I. The effect of gyroscop1c couple on n car while negotiating a curve is lhlll ils outer wheels tend to get lifted from the ground.

2. rf spin vector is rotated about the prt'CeSsion ' 'ector axis In a direclion opr:tOSite to that of precession through 90°, ~1c new position of the ;pin vector indicmes the dil'Cclion ol' the torque vector.

Which of the. following statements given above is/are correct'/

a. I only b. 2 only

o. BoU1 I and 2 d. Neither I nor l In ~ Kinematic chain. a qu,.temary joint is equivalent to:

a. One binary joint b. Two binary joints

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c. Three binary joiniS ct. Four binary joints

4 1. A single cylinder. lour-moke I.C. engine rulntinll al 900 rpm flus a cnuak length of SO mm nnd a connecting •·od length of 200 nun. if lhe effective reclp•·ocaring mass of the- engine i:;; 1.2 kg, what is the appro><imate mal!Jlihadc of the maximum ·shaking force' creatod ~y the cngine1

42.

'1:3.

4-1.

a. 533 N

b. 666N

c. 133 N <l None o f lhc ubiwc

I •

i • u •• (!,.n\1: IUI(IIII -

The crank of a slider-crank punch1ng p1·ess hns a 1MSS momNll of inutia of I kgm2. The above figure shows the torque demand JlC' revolut iual for a puncb ing opera lion. If the speed of the crank is found lo drop from JO rad!s to ~0 radfs during punching whnt is the maximum lorqne demand dllring tile punching operation? a. 95.4 Nrn b. 104.7Nm

c. 4 77.2 Nm d. 523.8 Nm

In the ligure shown ahove, if I he speed of the iuput shaft of the spur gear train is 2400 rpm and the speed of I he outrul shaft is I 00 rpm, whal is the modul~ of rhe gear 4'1

a. 1.2 b, lA c. 2 d. 2.5 Spira I gears are used t·n ..:onnecl~

.JS.

.16 .

.n_

I> ,,f II• a. Two pamllel shnJrs b. Two intersecl ing_shafts c. 1\vo non-parallel nnrl non-interseNing

shafts d. None oflhe above consider the followiug saarernents for a 4· cylinder inline engin~ whose cranks are arranged ot regular intervals of90• :

1. llaere are 8 possible firing orders fon lht ~ngine.

'2. Primary force will remain unbalanced for some f·iriug orders.

Which of iJae stntcments given above is/are COITeo.t?

a, I Ollly b. 2 only c. Bolh 1 ;uad 1

d. Nellher I nor 2

Consider the following shuements concern ing centrifugal governors:

l. Tite slope of the controlliug foo·ce curve ~hould lx\ le~s lhan th~t uf lht straight line repn.-senting die cenol'ip•ral ft>r<:ll al l.he s1>eetl considered for rhe stability of a Ct!nlri fu~al governor.

2. lsochronisms for a centrifugal governor can be achieved only at lhe expense of stability.

3. When sleeve of a centrifugal govcruor reaches its topmost position. rhe engine should develop maximum power.

Which of 1hc slaiCnaents given above is/arc c<)rrect'!

n. I and 2 b. 2 am13 c. 2 only d. 3 only Which of !he fol lowing me lnclurlerl in the li11ishing Qperatious for porous bearing?

I. lnliltnujou 2. Si~in,g

3. Heat treatment

4. Coining Selecl the correct culswer using the code giveu below: a. I and 2 b. 2 and J

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50.

~. 2 and 4 d. I and+ In gatil1g sysk~n design. whiCh oue of tl1o following is the con·ect sequence in which choke ;rr.:a. pouring time, pounng basin and •prue sizes ar~ c"lcul•ted?

11. Choke orca • Pouring time - P,uring basin • Sprue

h. Pourillj1 ba~in - Sp>'llc - C11t1kc area -Pourillg lime

c. Choke •= · Spme • Pourjng basm -.Pc;mring lime

t.l. P<>uriJJg hosin - Pouring time - Chukc area - Sprue

('ons iderthe fi>llowing sl~temen":

I. lJJ gn• welding, tl1c Iorch •lwuld be helil ol •n bng le of 30° 10 451) frorn the luwl:wntal plane.

2. In g~ welding. the ~;z., 11f the. torch del"'"~ upon lhe tl1ickne3• of metal to be formed.

·' · D.-.g in goo ouUing is tl1e tltna difference between heating of the r "''" and •~nrling the oxygen gas for cutting.

Whicb of the Sllllemenls given above are correct'! a. I. 2 and 3 11. I and 2 c.. 2 and 3

d. I ond S

\Vlucb of the foUowing are tho major <!haracter iS iics (lfsubmerg•d are welding?

l. 1-tigh welding speed•· 2. HiglLdcpositioo rot<>J.

3. Low pcnu-tratiotL

4. Low cloonfutess.

Select Ule correct answer us ing Ute eod" given below:

a. 24ud3

b. L 2 md 3 c. 3 nnll 4

d. I and 2

Sl. Tn ittomic hydrogen welding, hyllrogen tttl~ a.~

"· A h""ting agent b. ! )ne of the gases to generate the On me

c. An etfectlve shielding gas protecting the weUI

52.

54.

7 ol IIi d. .\ lubriCMI 10 increase the floW

characteristics of\\ehl met• I

Hm crack• occur in lhe weld and fi1sion zone' as tho metal s<~lidltit:s. Which of th e following arc the ca~cs for hoi crncks?

I. l'"'sencc 11f ~ulphur and pbosphoru~ in U1c ba$c metal

2. High c.1rhon or alloy <:()nton l of the hMc meta l

3. Moisture in tho joint or declt'l><lc

4 . luiut rosu·ail>l Scl<>et the corrcd un11wc-r using the code given below:

11. l, 2 am! 4

b. l. 2and 3

e. 3 and 4

d. I. 2 3 and 4 Which one of the following stalements ls correct'! In up-milling opcr:ttion. the uoperfo1mod chip Uuc.kne.-._

a. Is z<!ro ttl the >lnrl of th~ <Ul ond increases to a mJximum -value jus-t before lhe looth disengoges the wnrk piece.

h. Increase• to the nlaximuan value at the centre of tl1e tro vcl untl d--==•es ~wnnb tb• ond of tooth ongngentenL

c.. llis 3 nta.:Omum v:~ luc. juslafte.r Lbe cut r• slnrted and drops lo zero ol UJe end of the CUI.

d l<em11ln, un~hargad,

Comider the following sl3lemenls m •·especl of grinding'/

1. The pitch of the gn1 cu11 ing edge~~ L; larger U1.1n Ule pitch of Ute mllling euu~r.

2 Tb" culling nnglcs of the grits have a random gC<Jmctry.

3. The siLt: of tho chip out:< is W t')' •·moll for grinding.

Which, of UJe slolcmcnts g ivt:n abovo ore COO'CC·t'>

a. I and 2

b. 2 lUld 3

~- I and 3

d. l. 2 and 3

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55.

56.

57.

Consider the ·following statemcms : An inor~ase In the. coball content in the straight carbide grades of carbide tools I. Increases the hardness. 2. D<.>creascs the" hardne..~s. 3. Increases the trnnsvcrsc rupture

strength -1. Lowers I he trnnsverse noplure strength Which of the statements given ahove are correct? a. I and 3 b. 2 and -1 c. I and -1 d. land 3

Which one of the f<J IIowing is the correct value of the natural frequency (ru,)of the system gi,,en above?

"

c. (~)"' Jm

d.

"'

I r th.,. surfrtce of a comp<ll1enl is heavi ly stressed while the stresses in the core are of comparaHve small magnitude, wluch one of ~'" following heat tr~tmenl method is employed? a. Anneallng b. Tempering

58.

59.

60.

61.

K u( 16 c. Quenching d. Case hardening The tolerancre specified by the designer for the diameter <•f n shan is 20,00 ±0.025 mm. The shafts produced by three difterem of 19.99 mm. 20.00 mm and :!0.0 L mm respectively, whh 5arnc standard deviarion. Whnl will he the percemage rejection for the shafts prod1Jct'<i by machines A. B anti C1 ;1, Same f()r the machine"s A. B aut! C

Since the standnrd deviation is same lor the three machines

b. Least foo· mach[ne A c. Least for machine B d. Least for mnchlne C

Consider the following statements: J. Calli Iron hus pr1or abil ity. to d11mp

vibrations. 2. Cast Iron has higher compressive

strength compared to that of steel. J. Cast Iron parts are suitable where

pcnnancnl deformation is preferred over fracture.

Which of I he statements given ubove is/are correc11 a. 1.2andJ

b. I andJ

c. 3 only d. 2 only The initial cnntenls of an array A are: A= [17861514050Jl

What would be the cont.ent> of lhe. nrroy A a11er executi ng the following segment of the FORTRAN code? DOJ5 .1 = I. T. l TEMP=A(.I)

A(J) = A(J t 1)

A(J'"" I ) = TEM f' 35 CONTINUE. a. A [7 2 8 6 14 15 5()() 3]

b. A~ (S 6 2 7 0 50 15 14 3] c. A ~ [8 6 15 14 0 5() 3 7 2]

d. A= [023678 14l550] Match List I (Illegal Statement) with L..is1 II (Re<tSOn) ancl select the correct lln~1Yer using the code .given below: List I

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1\3.

1\. READ•.(A(T).T=(0.5) B . .READ•.(A(lJ), J = l. IO).J ~ 1,8) C'. IF (2. GE. D) TilEN B=O D. IF (A· BlGK(CID)TlffiN TOT= 100

List U I. Mismatched parenthesis

2 IJ1valid operator ' -'· ll le&•l subscript 4. Mi.•matched daL1 type•

A f.l o. 4

b. 3 2

"· 4 2

d. ·' j

# include <.sl<lio.lv

~ lo in () { tn1 1 - 4. j = 6, ~ =6:

{ lot t - 4:

c 3

4 3

4

D 2

l

l

2

Ptull f <'"' ·•d"o dO.o d", t. r. "'t);

I 1 ..... - ' -+ : .I : . :

Print f ("0 o d0~ d• o din''. l, j. ~):

What wcould be the printed output o tl~r th<> progrnm gjvc-11 ubovc is CM!Cultd'l

'' · 475686 b 465686

c. 466686 d. 57)686 Consider tho fOllowing pieco of code• def'ming function ,XYZ: Lnt X'YZ ( inl x)

{

lf (x- ~O)

Else

Rc:tum :X'YZ ( -x):

I Which one of the IOIIO"'inll • Wt<.mcnts ;, cmrcct? n. 11oc func.tion XYZ is syntactte.ll~

i.ncon·cct. h. ·noc lim.:tiun .:\T Z run• lbrcvco' fur

l'Hime vo1ueti of iL"i prlrtuneter x. c. The I'Uncliou X'YZ computes the

absolute n lue of x.

64.

65.

67.

., ol 16

d. 111e funetion .lfYZ count• the number of binary digits in the number.

C'orulder the following s~'!!Jli enl of • prO!!J11m: lnt j = 1.)( " 4 Whilo (~ •J<= IO) x~·:

Who! is lhe linn! v:tlue nf x?

" · 11 b. 12

e. l3 d. I~

A.sst>J'Iiun (A): C'arhurizins is done on uou-fcorou• olloys to U.Crcas<: tbe sUif 3cc hardness.

R~"""" (R): Pr..,ipiloliou bJmlcning uf nonefe iTOLJ.li. aUovs i-nvolves solution he.1t lr.,atment follo,ved by p•-ecipit.1lioo heol t= lin"" l

a, BoUt A •nd R al'e ind ividually true and R is lhe corrccl uxpl>uatiou of A

b. Both A nnd R ""' ludlviduall) ltW but R is not the corrcctcxpLUUltion of A

c. A is tru" bui R is false

d. A is fal!;• but R is lnle A.>ls..rfion (A): Lt atu·ibute control of qoolity by sampling. the snmple size has to he larger than variable control. Ronson (R): \ ' nrinbh::• arc goncmlly conlinuou•. and allributas have few discrete levels .

a. Bolh 1\ and R .,.e iudividually I rue and R is lb<: WI'T'<:Cl uxpbnatiou of A

b. Both A ond R are u1dividuallv u·ue bul R is uottlte ooo·rcot explnnati~n of A

c. A i• true but R is fol.sc d. A is false but R is tnu: As.'>ertiun (A): Value llnalysis is 511peo;or to other conventional cost rcdu..:.tion lt ohniqvcs.

R t'liSOII (R): in couvcntionol cost reduction led mique• bands a, Both A and Rare indiyiduoUy true and

R is the correct e:<pbnation of A b. Bolh A and Rare individuolly true ~ul

R is not the eooTecl explanat ion of A c. A i• true but R is false d. A i• fiolse hut R is true

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68.

69.

7H.

71.

n

Assertion (A): Hole b;>Si!; S)'$li!m h gener3IIY preferred to shall basis sy~tem ln tOier.mc<: <fc•igJI f<>l' selling the rc~uio<:d fits.

ReaStm (R:): hole hu" tc1 be given • larger rolcr:mc~ bonclth•n the motingshnlt

"· Doth . \ noul R lire it\dividuJ!IJ)' tnac nnd R l~ the corrcct explonnl<ion of A

h Both A and Rare individually tru~ but R ~~ not the correct c:xplnnatiton or A

c, A is tnoe hut R i~ t':tl<e

tl, A is fol•e but R is true Ass~rtiuu tA): •elective oonta•ul annngc• liJne more et,<iciency, Ro:asnu (R): ABr onllly•is is hn~ed un P:lreto dist•ihution

" Rl)lh A and R nre inclividu•lly Ina~ ,\nd R l~ the cnn'llct cxpl~nati•m of A

h. 13Qih A and Rare i)ldividually true hut R IS not the CQI'I'I:OlC.'qllanation or 1\

c. t\ is true but R [$ rat;e d. A IS ratS<: but R is true

Assertion (A): c~rbide tips are generally given negativ" rake anglo.

R""""" tR): oJrhide tips a1-e made tbnn very hard mnleaio ls. 11. Both A ;md Rare iudividonlly true nud

R is the corNet <>xpi:IJllltion of A

b. Both A :ond Rare individunUy true but R os no t the cocrect <:!<planation or A

c. A is true but R i.s fat.e

d. A is fn t.e but R is true

Assenion (A): Th" "riliCJ!I speed of ou clastic •hafi c•lculntod by the Rnyleight's method ;, higher thnn the actual critical speed.

R~ason (R): The higher critical speed ls due to higher damping ratio

n. Botb A and Rare individually true nnd R is tlt<: con'Cct cxplniiJition of A

b. Botlt A and R nrc individually true but R IS no t the corNet e>:plllnation of A

~. A is IJ'O~ bul R is full.: (L A i.s fa l~o: but R is true

.-\s,..rtion (A): Tapered roller beJ!rhogs must b~o: ti!.ed in h~::avy duly worm gear speed rcducm~,

n.

74.

15.

76.

10 "' tr. R~aso11 (R): Tapered roller benringll are suitable for large radial {l.S well AA axial load•.

a. Both A and R arc in,livillu~ll) true and Rio the correct t:xplnnntion of A

b. Doth A and Ran: ittdividually hue but R is nQt U1c C<UTcc.t cxplnnotion of A

c. A i> true but R is false d. A is r:alllc lfut R is true

\Vhid1 ono or the tollowin.g can cumpWiely bolnnce •cvol'lll masses I'CVolving ln difl'erena plan~ nn •• Shnft'? :a. , \ ~iugJc lfll!.<S in one cor IJoo pJnn01 of

The revulving m:lSSt:S

b. 1' •insle mass in :any unc pl:me c. TwQ m>S~e• iu nny 1wo pltone~

d. Two equal masses in zmy htio planes

Which one of tlt~ following <ttP"'""cs the sensitiveness of a governor?

ii. x ;l l\r!

2K,N,

h N, N, 2N,N,

c. 2( N1 1 A ,)

2N, - N,

d. 2( N,- "'' ) 2N, I Nl

(Where N1 • J-llixlnwm <"Juilibrium spdt!d N2" l\1lnunum cquilibl'iwn speed) lJ' tlae wtalrudial intetfer~ncc belwtel! two cyl.inders fonning ~ compound cylind«r. L< S and Young~s modulus of the matcrinl.s of the cylinders i• a then the inlerti:ace pressure developed a the interface bet" een two cytJndo.:s of r.ft<: same matcri•l nod somo length is:

a. DiJ·cctly pmportionul of EI&

b. Inversely proportional o)f JV<i c. Directly proportional of E/8

d. Inversely proportionnl ofB'o

Power 6Crc>WS .,.., U<Cd to ri'Oduce uniform,. s low nnd p(HH1rtltl motlon 511ch as required in pr.:ssc.. jockl> and othc:T mncbinel')' : V ' tlucnds "'"' u.ually out u•«d for thi• applic:otion due In lcm el'liciency, '!11is is ~ec•u.1e:

3 . Profile ~ngle IS >..ero

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om77,

78.

79.

b l'rofil~ anwe I£ II>Od~rale c. Profile angle is lnrg~ tl There is dlniculty iu manufacturing the

proillc Consider the following 61UI~mems penatning to me basic Lewis- equation for lhe strength. design of spur g.:nr teut.h I Singl~ pair of lcct.h panicipatcs 111

power tronsmission at an)' in<Ullll. 2. Til" tOOlh is l1111Sidcred -as a <1tnlilever

beam ofuuifonn ; lronglh: 3. Loading on 1hc teeth is stmlc In nruure. •I Lewi> r\j<lalion mkes into acl'llllnl th~

inaccuracies oflhc IMih pmfrk

5 LeWis equation mkes mto account the inaccuracies Mll>e 1oo1h profile.

Which of ~1c Slnlcments given alxlvc arc corrccl"l a. I. 3. -l and 5

h. I, 1. 3 nnd 4 c. 1, 2andJ d. 2. 4 and 5 Match List I (TYIJC nf Gear" Gear Train) with List II (Diffe.rent Usage and D1ive) and sekct the correct answer using the code given below Ute Lists: Lis l I

1\. Epicyclic gear train B Be~el Gear C. Wonn-worrn <..ear D. Herringbone Gear List 11 I Reduces end lhrust 2. 1-.ow gear rnt10

3 Drives nno-parull"l shafts

'l')'ai••lersecri••g

4. Dnves non-parallel intersecnng shafts

5 High gear ralin

A 13 c D n, 5 4 3 l

b ~ 3 4 5

c. 5 3 4 I d. 1 4 3 5

Whm is 1he main advantng~ of hydrody,tmnic hearing ov.:r roller bearing? a. Easy 10 assemble h Relative[) I<IW pncc

80

82.

83

ll ufl b c. Sup;:rior load carrying C81Jacil~ al

higher speeds d. Less frictional resistance I I' the lc>ad 011 •1 ball benriltg is h31Vcd. iu; life: a l{emains unchanged

b lncro:nscs two lllncs c. lncril8Scs four times d, I ncrcases c1ght lnm:s A square ~"e} of side d/4 i.~ ·1o be fmed on a shaJ\ of diameter d and in the hub or a pulley. if rhc materiul of1h~ kc)' <U>d shaft Is same und 11t~ two ttre Ul be elJUally Slfong in shcnr. whnt is the length of lht kcyj"

trd a. -

2

b. ltrd --3

3:rd l', --

4

d 4;rd --

5

f iiOUC

'·~~ Two plates 310 joined logethcr by mcuus <.>t' single transverse :md double pumll<l lilk1 welds ns slumn in figure given abow. If the si7..C. of fillcl i' 5 mm nnd allownhlc shear lood per mm is JOO N, whot is the approximate length or each parallel filler! 3, 1.50 11101 b. 200mm c. 250 mm cL Jl)() mm Whm is 1hc :.afe 5tati~ tensile loud for a M36 x 4(' bolt of' mild sleet having yield ;u.:ss of 280 MPa and a tat'lor of safety 1.5? a .. 285 kN

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om84.

85.

86.

87.

8N.

b. 1.90kN

~ 142.5 kN d. 95 kN Autofrt:llll£e i; a moU\nd ,,(: a. Joining thick cylinders b. Reli.:ving stresse. from thick cylinders c. l~'e-slressiog lhtck cyUndoo;

d. Increasing. the lite of thick cylinde"' Cort•ider the following •tatemenlli in respect of wonn gear; : I. They •re used for very high speed

J edu~:tions.

2.. 1 he velocity r<ttio does not depend on th~ ltclix angk of lh~ worm.

3. '1 he axes uf " OL'tD and tl""' 3l'o gcn<.-raUy pcrpeudicuJar ~ud uou~

intersectin.g Whicb of rho s l1t<:monls given abO\'<l " " correct'/ n. 1 and 2

b. 1 o.nd 3 "- 2 nod 3 u. 1. 2 nod 3 A ltoUow sluft of tltc o;uno cro~•-sediou area ond tllJIIerial as tltat uf a solid shalL h-ansmif.s; n__. Sarne torque

b. Lesser tontuc c. M ore tor'tjuc

cl Connot be pn:dictccl will10u1 rllt>n: dalJ•

[n sliding conJact bcormgs. • Jl(lsitiYt' l'fOSSUfC Cllll be buill up and A ln.td •upported by" Huid only by tho use of a: ~~ ~ Divc:r_giog tilm b. Convor'gin!,<·divcrging J'ilm

c. Convorgir~&Jilm

tl T11nl 111m If E, G and K rlcnctte Young's nmdulus. l\ lodulu. of rigid ity nnd Bull... Motlul.''"· resp<."Ctively lo r •o elu~t ic rnn(crivl, then which <me of the rui iO\Ying c:m he p<ISSihl y true:?

"- G : 2K 11. a ~ r;

c. K : E t1 G ~ K ~ t

89.

90.

91.

92.

93.

11 of 16 At o poi.nl m two-dimcn.slonal slt<:ss S)' ~ttem o x. = 10() Ntmm', o1 :- t ,y -:- 40 N/rnm~. Whnl is the mdius of the i\lohr cin>h:fo•· su-es~ dr.>wn with~ Sll.:!le of: l em '" 10 N<~nnr1 1 a, 3 em

h. 4 ern

c. 5cm d. 6cm

TI1e point of contr"tltX:Ilre L"' :a point when::

:t. Shead(>rce changes sign

b. Bonding momenl changes sign

c, She-ar force, is m:•ximum d. Bonding monumt i!J maximum

Consid.:r tltc follo\1 ing slatcm~nt.o I. Forglntt rodu"es the grain siz" of t11e

mcbll which results ln .a decn:asc [n

•tren glh nnd toughness.

2. Porged components cnn ~c prodded with thin section•. without reducing Ute slt1:ugth.

Which of Ute sl•temenls given 'above is/oro ~orrect7 a. Only I

b. Only 2

c. Both I ond 2 d. Neither I nor 2 Con•idcr lhe following slatementsr 1. Strength of stool incroasct w-ith cnrbon

content. 2. Young's Modulus of steol increase.•

with carbon content.

3. Young 's 1\ lodulus of steel rema in• uuchauged wllh variation of ~ttbon content_

Which of lit~ stalem<:nt;, giv"'' abov~ isi•J'e correct?

a. l only

b. 2 only c. I and 2

d. l11nd 3

A hollow pressure ' 'essel i~ suhject to iuttmtall)r't~surc.

Consider the folio" ing st~tentent:s :

I. Rodi41 st ress f<t lnnc::r rndius is always 2.Cf(J.

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om94.

9(i.

1. !Wdinl slrest ut outer radius ;, 4l\\•Y8 zero.

3. The Lmgentinl ~tress is nlw~ys higher thnn other •lre.~e.~.

4. The umgential s tress is n I ways lower than uther •h·es•'-'""·

Which of the statemen ts given ohol't: arc corrcc1?

a. I Arltl 3

h. I ~nd 4

"' 2 ;md3 (!, 2 and 4-Wbich of the following p•irs cotrectly motched7 (Designation of !Description) Steel/Cost iron) L F"e g 250 ; Minimum ten$ile • lnmgtb

of250 :-l•mm' 2. 40 C ll : Percerttage of Mongaoese is

0.7"o- 0.9•t 3. FG 201• : Grey cast iron with ultimo!~

lensil~ s lr<:ngtltof200 f\.'/nun2

S~lcd Ute correct ans\1 er u.ing Ute (:()da given below~

o. I ond 2. b. 2 nod 3 c. I 3nd 3 d I 2 ond 3

eon~ider the tollmving st~tement"

1. Endtu·nnce •u-ength of • comptment i.s not •ft<>cted hy it~ su<face linish and uotcb 8ensitivity otlhe mal<:rial.

l. For tcn·ous mat..-ials lik.o $tetl S-K curve booomC!I asymptotic at to• cyolos.

Which of the statements gi\en above Ware correct1! a. I only b. 2only

.:. Both laml2 d. Noilbor l nor 2 At • s.oction of • beam. shear fqrot; l$ F with zero BM. The cros.-ooction is squar.: with ~ide a. Po!nt A tie~ on neutr.ll ~sis ltnd point B is rnid way bct\<een neutral AXi; and top ctlge, i.e. nl di.stnncc n/-1 •bt1vc the n~'Utra l o>.-ls. If <A ood ' -"' denote shc.-u:

97.

98.

l 3 t>f 16 stre~<Ses at points A and B, then whot is the v~ltae Qf , _.! t o? a, 0 h. J/.1 c. -1./3 d. None of .above

If the area of cross-section of • cir..,ulnr section henan i• toad~ four tunes. keeping the loads, le'18lh suppnn condition• ttnd material of the ht:um unchanged, tl1cn the q\ltllities ().,ist I) wiU change through different foctors (List nl. l\·btch the List I with the Lisr IT ond select tho correct •n•wcr using the code l)ctvcn hdow the Lists:

Li~t r A. M•llimum Bt-l B. Dell ec.ti on <'. (;lending Stres.• D. Section fl.lotlulu.~ Listli

I. s 1. I ~

~- V8 4. Vt6

A B •• • , b. 2 4

c. 3 4

d. '2

c 2 3 2

3

D 4

4

f\fonnal stn:sws of oqu:U magnitude p. bot of opposite ~iS""· act at o point of • stmined nlateria I in fl"rpendicul:ar du·eclion .. \Vh:at is Uae 01aguitudo of the Nsultaul noounl s tress on n pl:mc inclined at 45° l:o the applied s~• .. 'l

•• ~p

b. p/2

"' p/4 d. Zero

99. A solid uniform metal b3r ol' dinmc'tcr D and hmgth L is lunging vcrtic:.1 lly from its upper end Th~ olong:alion of the h:or due In self weight is: ~t . Propo•tional to and inversely

proportional to o' b. Proportional to L~ Md invell.lely

proportion;~] to 0 2

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c Proportlontd of L bur lndcpenucnr ofD d. ProportiOnal of L' but indc.J)Cndcm of

0

Wbat is the total m1gle of twist uf llre s1epped shaft subjec.t to torque T shown In figure givtn abo1•e?

167' a --'­

JrGd' 38T.

b __ ,_ rrGd' 64T

c. __ ,_ rrGd'

d. 667;

rrGd' 101. l·or a poWer transmission shall

transmitting power f' a.t N rpm, irs dianre1cr IS proportional ro:

it. (~ ]"' b. (: )"' c (~)"' d (~ )

I 02. Mntch List I (Type of Ocarings) with List I I ( I YJlC of Load) nnd select the corrccl answer using the code given below the LISts : l.ist I A. Deep groove bearing 13. Tapered rol l~r benri11g C. Self aligmng bdng ll, I hrnst bcnnng LISt II I Radial lmrd

2 Radial and axial load

3 Malnly ruuial mlsalignmem

~- Mainly axial load A B

a 2 b. J ~

c. ·I

d 3 2

load

c 3 I

3

ll ur J (>

with 5haft

D 4 2

2 4

I 03. ln single server queuiug model if arrival rare is ;, nnd ~crvice rate is ~ then whnr is the probability of the S}'Sil111 bdng idle'!

3. 1J11 b. lt!h

c. 1- )Jil

d. ( I ~).)

I ()4 Which l)f th~ lhlluwing are correct iu Fl!SJlt'Cl of graphically solved lincUJ programming problems~ 1. 'rhe rogion or tbu:;iblc solution ha~

eoneaviry property. 2. The bou.ndurics of lhc region nrc lines

or plnncs. 3. The1·c are corners or extreme J)(>ints 1111

th~ bmrndm-y Select the correct nnswer usmg the code ~ven below: a. I mrd 2 b. 2and3 c. 1 and 3 d. I. 2 and 3

I 05. Mar~h List (Production C'omrol f-unction) with List II (Explnnation) und select the correct answer using the code given below tl1e Lists: List I A. Bill ofMaleriuls (BOM) B. C'upucity Rcsuurw Plunmng tC'Rf') C. Material Rc~t1ircrnenr Planning \MRP) D. MIIS{J)r Production Schedule <Ml'St

List II I A technique for dcrcrmining the

quantity and ltmil!!l (If dependent demand nums

2. A techn iquc for dotcrnrining personnel and Gquipm~nt capacities needed lo meet the productilln objective

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3. Specifics wh~l end items are to bo produced and whon

4. 'llie part numher< & qunntlly required per asscrrihlr

A ll l' D ~. 4 1 2 ~

b. 3 2 4 c.. .j 2 1 3

d. 3 2 4-

106. If the aJ'J'iv•ls arc compktely r>nuom. thcu w hot is \he probability da bi bution <>f number of arrivals In a given time1

a, N'ej!ati \'e e.-<ponential

b. Binomial

c. N'omul

d. PoiS!ou 107. ~btclt LISt [ (Activity) wiU1 List ll

(1'cchnique) and select tlu> correcl answer u<ing tl.1e code gi"eo below the Lisu :

10~.

I(~J.

List I A Line Balancing B. P1'0duot Dwolopmcut

C. For=sting D, Quality Conll'tll

LISLU

I. Value Analysis

2. E;,cponential smllulh rng

3. Control chart -1. Selective control

S. Rank po.fillon motA'\ A B C ..

b.

c. d

2 5

2 s

4

2 ·l

2

D

For • pmduct, Ote foreca•r li>r l.he month of J~nU3ry was 501) uniL•. !'Ito< acluol demn11d turned out to be ~SO unilll What ;. tl1c forec-ast for tlte monlh of February using e.'<ponentiaJ smoothing method with a smoorhlng eodliciont • 0. l 'l

:L 455

b. 495 c.. SIXI d. 545 Which one of Lite followi.ng mel.hods can be used for forecasting when a dettuond

IS <>I 16 pattern is consistently incre••ing or decrea~ing?

a. Regre.slo" analy.is

b. Moving overogc c. V Jril\nce unlllym d. Wcigbt<ld moving nverag~

110. J\blcb L;_..ll (hlatclting Proces•) wiU1 L.isl U (Applic:otion) and select l.he correct •m•Wer ~t•ing the COlle !!iVcn bdOW th e Lis!$:

Ill.

112.

113.

Li~ll

A. !.10M H. LBM C. OSM D. EC!II List II L Holes & cavities !Jt lur<l & !11 ittlc

matldrinl.s

2. Micro-d1illlug & mic1'0·wdding of materialrt

3. Shapin_g of hard mclll ls or rcshapin,g. of cemenl<ld cahide tool•

4. Shaping of cemented carbine dies and punche:;

A B l' 0 a. b. c. d.

-1 3 4

3

I

2

I

2 I

l

2 4

ln helica l tniiUug. tho rnliu of the. circumlerence oJ the gear blnnk ln lhe l"nd of the lteli• detcnnine~ the;

" · Proper •peed to ulle

h. Prclper feed nnd depth of cnl required

c. Angle KCU.ing of OJc. mncltinc luble

d. Gear ruliQ for table •<''"' aod dividing """d

Which one of Otc following processes produce. a c :o• ting when pressure f'l)rces Ute 1110llen metal into the nwuld cavity7

a ~hell '""uldlng b. lnvestmenl casting

c. Die C:li'ting

d.. Continuous cnsting COtlllidcr Ute fo)llow in~ • l:otcmcllts!

l. In nrc welding, 659 o to 75% ltQat [s

genernred nl the nnodc.

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1. Dulv ~vcle in CDsc of ore welding is the cycie of compl~ie welding of worlo. pi•cc tl·om the l>e&inning.

3. Arc hlh\1 is mnre common ll'ith DC welding.

Which of U1c s tnl(.'fl>cnrs g i\cn all("'" are cvrrcct'?

n.. l, 2 :t_nd 3

h. I And 2

"-· 2 end 3 d. I 3Jld 3

114. Magnetic formin!l is an example of: a, Cold limning

b. Hot forming

a. friglu:n<:rgy rate fom1ing

d. RoU forming 115. Which OIIC of the foUowing is d1c COIT~'C.l

expression for the ~~vterchant · 5 mach inability oon,<lrult'l

a. 2<j> +y - a

b. 2<j) - y' Q.

e. 2~· -y- e<

d. ~ T y- v.

IWh<Te -1> = shc3J' (JJlgle, r = tii"rion 11nglc & a.= ra~" angle)

IU1 1\lotcb List I (Tool) with Usl n t Element of Tool) and $elect the correct answer using. the code given below Ut<: Liils:

List I

A, Broaclt

H. Re.1mer (', Drill D. Col'bioe in•en· fu"e rr1ill

List n I. Tung

2. Pilot

3. 'Fl'OIIt lllflt•r

~. Bond

5. Sweeper tooth

.\ B

•• 2 5

b. I 3 c. 2 3

d. s

c l

D

4 5

I 5 4 3

ll>ut I!!

117. The g;~ting ratio 2 : 8 : l'or copper in gatin@ system d""igu refers to the rotio of areas of:

a. Spmc : Runner : Ingotc

b. Runner : Ingale : Sprue

c. Rmlner : Spruc : Ing•te d. Jugale : RUilller : Spn1e

II~ In shell nmuldins, holY can the shell tl•ickness be accuratelr ln>iutaiocd'l a. By cnnlrolling the tim( during which

the pnttoru is in contocl witl1 mould

b. B)' conlrolliug U1<: Lime during wl1icb the p>llo'lll is healed

u. By lllliinfllin ing tl•• temperature of the pa!lcm in !Ito ronge of 175°C 3go•c

d. By U1o lypu of bintlw· used

J 19. Which one of thu following is the> mo;L signifiCJJnl property lo be considered in the selection of material for the n>anuJa<Olure of locullng pins and drill jig bu•es used In Jig.s and fL'tlures?

a. Wear resistance

b. Elasti<:ity c. Shear strengU1

d. '!'ensile s!J'<lngtl•

12H. Which nf !he tb llnwing is/are use~l "' h1w wearing (ool mat"!'iol{s) in cleclriCl dis.,b•rgc m•chining2

• . COilPCT uml brus• b. Aluminium and gr11piute

u. Silv.,. tung.o;~<:r• and copper tun.g•t.en

d. C>st ir"n