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MECHANICAL ENGINEERING I PAPER-II

Machme tool manufacturers prefer grc~ Ci!St-!ron grudc 40 lor producmg mnchina columns tmd tables becnuse giC) cast-iron is

I. Hea'y 2. E:s.~ily cnstahlc

3. rrasil) \\cldublc

~ - Having gl><ll.l damping cnpncity

Select the con.:cr answer using the codes g1veo below : a. I nnd2

h 2 and 4

c. I and 3 d. ~ ;md 4

Which one of the following mcchnnisms is employed for indc>ing of turret in an automatic lathe ?

a. Wnii\\Onh

b. Rack and pinion

c. Ratchet and pawl 1,1, Geneva w111:d

y

0 s 2S3S X

While p;lrt proa;ramming in C C machines. tl1c itJ.pm or dimensional information ltll' tltc tool putl1 vru1 be giv~n Tn the absolute co-ordfnate ;ystem or in mcrcmcnwl cotJrdinnt~ .:ystcm. 111c nbovo tigure shows the route 111 be followetl by Lbe tool from !Ito C. i.e_ () - A - B - C If incremcnwl coordinate system is used, tlte co-ordin3tes of ea(·IJ poim A. B and Cur<

a. A : X 5.0, Y I 0.0

5.

0.

U : X 20.0. Y 5.0 C; X 10.0, Y- IO.Il

b. A ; X 5.0. Y 10.0

U ; X 2S.Y 15.0

C : X 35.Y 5.0

c. A : X 10.0, Y 5.0

0 : X 15.0, Y25.0

(' ; X 5,0. Y 35.0

d. A : X 10.0. Y 5.0

B : X :i.O.Y 20.U C : X 10.0. Y 10.0

Standard tlmc ts

a. Norntaltittle -t Alluwances

b. (Nonnollimc x Rating)+ Allowances

( Nonnal time ) All c. + ownnces

Rating

d. Normal time + (A llowancts x Rating)

Which one of Lbc followlns Is not a te<>hniquc of J'redetenn ined Mution Time Systems'/

a. Work li•ctor system b~ MTM

c. Synthetic data

d~ Stopwatch time study

An operations consultam lor an automatic car wosh wishes 10 plnn for enough capac1ty of stalls to hnndlc 60 cars pc.r hour. Each c.ur will have n wash time of 3 mioutcs, hut Lbcre is to be a 20% allowance for set-up tunc. d~lays tUld payment transactions. Ho" many car wash stalls should be installed ? a, J

b 4

0 . 5

d. 6

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7. Which one ofthc fo llowing types ofl•yout is used for the manufucture ol' hugo ~il'c o'31~?

n- Product layout

h. .Process lnymn

c. Fi.xed pos ition layout

d. Combinntiun lllyout

8. A fumiture company o; maiot;unmg a corua~nt work force which i::ln produco 3000 l:llblcs. I"'' qunrtcr. The- arumnl dcmnnd is 12000 nnits and is di.•tributed se.1Sonally in accordance with tl1e quar1erly W(kXCI; Q, 0.80, Q1 - L40, Ql 1.00 md Q, 0.80. Inventories >ro accumulnted when demand is less tl>nn lho .:apncit) and are used UJl durin_g periods of slr<>ng demand to suppl~ th<> tolnl dcmAJtd. l'o take in lo nccount .nnv sc:t.~on3 l derruand the inventories on hand :,t the beginning or ll•• uo'St 11narter sb.ould be at least .. () b. (,()()

c. 1200

d. 2400

9. I 'he span of control <efer.~ to the ;1. Tot:& I :.unount of <:<>ntml which c>n be

exercised hy Ill<! supervisn•·

h. 'l otal number of persons which "-'POI1 to an-y one supervisor

c. Delegation of nuthn•5ty hy the ~upcrvisor to his subordfn~ta

d n elegMion <>f re~pon~ihility by lhe gupervisnr tn hi• ~ub•~rdin:o.tcs

HI. Mntoh l.ist I (Trend/Delilct) wilh l.&St II (C'h;or1 ) anti select the. ~o•·•·ec t answer ;

List l

A. Trend

B. Dilop...>rsion C. Nnmber of tlet'ects

D. Number of defective!>

List II

J. R·Otart

2. C-Chart

3. X -Chart

4. np-Chnrl

5. u-<"lwrt

~ nf I ll .\ 13 c- D

•• 5 3 2 4

b. 3 4 l

c. 3 2 4

d. 3 A 5 2 I 1. Which one of ll1e Jbllowing st&temcnts i..

correct ?

a. Time 1cries ann.lysi!- kchniquo of fo recasting i• nsed for v"'Y long range forecasting

b. Q~l itative techniques ore osed for lrmg. ronge fore.c.1stin!! and quantita tiVe tcd &n iqucs, ft•r short ;ond medium r:mgc forcc:t.~~o liug

"' Coefficient of uorrclation is ~lculnted in .:ll•c of time ~eri~~ technique

d. !Vfarkct SUIV<OY ami Delpl1i todoniques nre used for !lbort r:mge foroc~sting

12. ln the •olutiun M lin""" p•·ogrnnuning problems by Simplex- method, for deciding the leaving variahle

a. nt¢ rnoxim um negative C4efficienl In lhc obj,·d ive 1\mction 1'011 is •elect<>d

b. l be minimum positiv~ ratio of l11e nsht· lulnd <ide to the lirst deci>oon "arlable is selected

c. Tbe maximum posit-ive r-..tio of the right·hwd •ide to ~1e "oefficienl> in tho key column is sele<!lcd

d. The tninirnum positive nslit} ul' the tilllll bond Mide U) U1e C(lCJiicicnt iu the k;y ~"' lumn i• .elected

1 ~. Consider tb~ JbUowing .\tatemcnts on lmnsportation problem :

1. !J> \ O!!cl's appro"imntioo method, prtority ~ llotment is made in lhe cell witb lowest cost itt ~1e co lumn or row with le.1•t pC1lillty.

2. The toonh-Wcst o:omcr method e-nsures f:&Slc:r optimAl solutioo .

3. If the total demand is higher tl111n the supply. trampo&tatiou problem c:umot by solved

4. .·\ f""siblc Solution W 3)' nol bQ <ID

optimal solntlon.

Which of thO!!.: ~Uiiomcnt> ar" com:ct ?

a. I und 4

b. I nod 3

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15

16

17

c. 2 and 3 d. 2and4

At a self-service store. a c.ash1er can serve I 0 customers in 5 minutes On an av~rage 15 mslomers m'nvu every 10 mmutes If the arrivals are ns per Poisson distribution and sorvic"'i as per C"J>Ouential distrobution. ~Jc pmbal>iiJty that the cashier WOl~d be idle IS

b. 0.75

c 11.25

d 0 ABC analysos in materials management is a method of classify ing the mvemones based on

a. The value of annual losage of the itums

b l::couonuc order qu:mtoty

"· Volume of material consumpt ion

d Quantity of muterials used

Consoder t·hc following steps wh1ch arc onvolved on construc1ing a f11nctoon !UJalys1s system technoque of value engm.ecrmg.

Fortd the crinc.alpath 2. Pmparc a fwoction wot.ksheet

3 LlSllng or fWlCLIOns

4 Diagram Layout

Which of the followmg &>ivcs the. COIT<'Ct :;equence of steps'/

a. 1 3. 2.4

b. 2.1,3.4

c 4" 2, 3, 1

d J . 2, -1, I

Consodeo: the followong St-dtements 111 respect of double sam piing piau · I Average number of poeces onspected is

doul>lc that of sutglc srunplu:og,

2 Avcr'l£,e number of poeces inspecttd i~ less than that for smglo sampling

3 Decis1on It' accept or reject the lot is -1aken only after the inspection of both sample,;

~ . De-cision to accept m· reject thu lot is reached somuumcs after one sample and sometimes after two samples

18.

19

20.

21.

3 of Ill Which of thew statements fll'e cooTect "

a. l. :!nndJ

b 2 and4

c. I and 4

d. 2 and 3

The vanauce of the complerioo tune for a JlfOj <Ct os the sum of varoaoces of

s. All aCLtvory limes

b Non-L'I'lbcal activity times

c. Critoeal actwity 6m('~

d Acuvoty Lulles of fit'St and last activo nos ot' the project

The earliest tune of the compleuon of the last event1n the above network m weeks ts a. -I I

b. 42. c 43

d 4G The oudoroct cost or a plant ts Rs. 4,00.000 per year 'The dof'C(;t cost is Rs 20 per product If the average revenue per product Is Rs. 60. the break-even point is a. I OOOQ products

b. 20000 products

c. 4 0000 products

d . 60000 products

Whoch one of the followong staLenlems correctly defmes tbc torm • dlspatchiug '7

a. Mamrnomng tho record of time of Starnng and complellon of each operation

b. l11e appraosal and evaluation of human work m terms of tune

c. 'raktng all such steps whoch are meaut ro •!Teet and ompleont'Tlt the progrnmmes of production according ro plans

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24.

c.L Moving the work after con,plcUon to the next process or machine on the route

In compmer application, if a direct dialogue is carried on between contputer and user. it is referred to as a. Real-time application

b. Dccisiou application

c. Batch processing application

d. Interfacing

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l ,_,lJ> I ...l

t ENO )

lu the above flow charL if rite ' 'nlul!s of input• ure, A z 6-1 and B : 3; the value of Dis

a. 1

b. 30

c. 32 d. 60

Which one of the following statements is not correct '!

a. Every C-luuguage progrumme contajos a runction .. Main,

b. In symbol ln C-lnnguag.e tells the computer programme to print a n~w line

c. In a C-language programme. there is no need to declare the variable lypes

o. In C-lnnguage the text enclosed in ( aod "t is a comment

For deleting n record from a dBasc Ill plus file. the command(s) given is/are

a. delete

26.

28.

b. delete followed by pack

c. delete I'OIIowcd by done

<1. delete folltlwccl by modify

t:on;idcr the following stat~ment.s rduted lu computer ttpplications in mechan ical engineering :

1. Co:>mputer can solw any probl~nt that is impossible 10 be solved by conventional calculation methods.

2. The optimization techn iqoes involving numerical coJculs tious can be essily employed using computers,

.l. The speed of calculations in computers depends on speed of input-output devices

4. The central processor unit maittly co­ordinates rhe functions of various pans of the computer system.

Which ofihese smt"el11Cil[S is/are correct?

a. I. 2. 3and 4

b. 2. 3 aod 4

c. J only

d. 2 only

Assertion (1\1 : Slider-crunk chain i5 an inversion of the fottr-bar mechanism_

Reason (Rl: Slider-cnmkchnin often finds applications in mosr of tl>e reciprocating mach incry.

a. ll<lth 1\ and R an.: lndividmtlly true and R is tho correct c.xplanati<m <JI' A

b. lloth A and Rare. individually true but R is not the correct explanlltion 11f 1\

c. A is true but R is lhlse

d. A i~ false but R is true

Asscnion (A): 111c nla.ximum cfl'iciency

('7 = 1 -s~n ¢J

i tslll¢

of a screw jack is sante, whero ljt is the friction Mglc. for both mol ion up and mot ion down the plane.

Reason (R) : The condition for che maxi muu\ efticieucy for 1110tiou up nnd motiOn

down tho plano is SHIM, given by ct = :

f. where a: = helix nngle. 2

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30.

31.

32.

,,, Both A und R ru:e individually tnoc and R is the correct e;q>lamllion of A

h. Both A nnd R nrc individually lr11e bUl R is not the con-eel explanation of A

c. A i.•tn1o but R is fnl•e

tL A is fnlso but R is true

A$sertion (A) ; A Wi><>tlruff key is .m eusi ly adjuslublc key.

R~-.sou(R) 11t~ Woodruff )(J:y -:accommodaks itsdf to :my lapor in l.hu­hnb or boo• of lhe m•ling pie<: e.

a.. Both A and R are individually true ond K 1s the correct explaootion of A

b. Both A oml R nrc individually true uul R ~~ no• the correct <:><pl•nati(>n "r 1\

~- A ~ lrtte but R 1• fal•e

d. A is fol&~ but R i• true

Ass<'Tlitln (A) · ln Cllsc of frictihn <!lutehos. uniform went the-ory should b<> consid,.cd for power tr.msmission C-illcubhon rather ll•an the 11nifonn pressu~ the<)fy.

Rca~on (R) • 11u> unifonn prcNil'l: tlteory gives o hiehor frictian torque than lh" unifon11 \liC3r lh~m).

n, Both A andR OJ'e mdivoduolly tnoe ~nd R is the con"'CI CXJIUtllllUOn of A

h. Both A •nd Rare individually lrne hut R is noLihe correct ;:xplanation of A

c. A is truo but R i• falso;

d . A is fa lse but ~ is true

Assoortion V\) . 1n • simply s upported oenm subj.,.,led to • concenlroted load I' nl ohid-span. the ela•tic curve s lope beccmes ztlt> w•der lb .. lund.

Reason (R): 111~ delkction of lh<> b""m l• mu:-.unUul .:tl ruid .. ~pan.

u. B<Jlh ... and R nre individu3.1ly lrud and R is Ute com:ct "'~planation of A

1>. Both A oud Rare individually lrue hut R is 11ot tlu: coo·recl <:.'<ploMtion of A

.:. A is tnw but K is f-alse

d. A is folse hUl R is true

t\siertfon (/\) ; llnli:ke in the c.1~e of ionic bonds. the co-ordination number. for cOVlllonl ly bonded atDmo ""'not conlrullod by tbc radii nlliu.

R~-.son ( R) . A coVltlent bond tuu • specific direction orb<otding in space.

34.

35.

36.

S u f 16

a. Both i\ and R m-e indivitlually true and R is the corred tl.'(pl~nation of A

b. Both A and R are mdivi(lu" 11~· true boll R IS not the co1Tecl expianalion of A

c. A is true bnl R i• f.1IS<:

d. ;\ is fnlse but R i> true

A.bsertiw1 (A) : ·rile rn~ehinahil il)' of s teel' impn1vcs by adding •ulpltor lo i1bl.1in 8<>

called ·J'n:e M:ochining Steels'.

Rc:~san(R) . Su lphur in Sleel forms man gancse sulphide inch,.ion which helps to produce thin •·ibhon like continuous chip.

a, Both A and R ore individuolly tru" 311d R is the correcl ~lan~tion of A

b. Roth A :on<l R .re indiviclu,.lly truc hut R is IIO!lht cnm:ctcxpl•nati<m of;\

c. A i~ tnte hul R os f.~lse

d. A is false bui R ;, true

Ahs~rtion (A) : WI\ lei' jet m•chin ing ll'CS

high pressure nnd high velocity water stream which ncl'; like a snw 111\1 cu(ls • •tarrow groove in 1hc maU:rial.

Re.1Son (R) : The lore" rt;qurred tor culling is gcnoralcd from sudtlc:tl chang" ill lhe momentum nf lhc Wt1UJ1' ~ b·uam.

a. BoUt A and R m·e individuaUy ltue and R i< tho com:cl t:Xpbnalion of i\

b. Bolb A aud Rare individual!~· u·ue but R is nollhe correct cxplanolion of A

c. A is true but R is fal;e

d. A is folse but R is true

A .. ertion (i\) : While rolling metal •heel in rolling mill, the edges are sometimes uolslmightaud flat but""' wavy.

Re.oson (R) ; Nqn-uniform mechanical lli'OJ>t•1.ie.; vf the Oat matcoi•l oolltd o<il rcMult in w:avin~:Sl!i of the: edges.

"' BoU1 A ond R >rc individu>Uy true IIJld R is lhe c.orrect explanation of i\

b. Both A and R 4ro iudividuaUy true but R is not the correct explanation of A

.;, A is IJ•uc but R io l'abe

d. A is fa lie but R ;. l)·ue

Assonion (A) · In cMc of control chart. for variable:!!. lhc average of r<.'llllings of o sub­group of font· and mo•·c i.~ plollod r:olhtr U1an tl1e- individunl readings.

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38.

39.

Reason (R) : Plorting of individual readings needs a lot of time and effon.

a. Both A and R are individua lly true and R is the correct explannlion uf A

b. Both A and R are Individually tnle but R is not the correct explanation of A

o. A is true but R is talsc

cl. A is false but R is true

1\ssenlon (/\) : In the SOIUiitllt of transportMion problem. for 11pplication optimttlily test. tlte numbet· of allocations requir~d is m + n - I and these ~houtd be fn independent positions.

Re.a$()U (R) : t f 1 he numbcr of allocations io uot m - n - I , values ol all oddments, i.e. u, and v1 cannot be found.

a. Both A and R are individua lly 1rue and R is 1he correct explanation of A

b. Borh A and Rare Individually true bur R is nollhc correc t explanarion or A

c, i\ is true but R is false

d. A is tlllsc but R i;; !rue

c

• • . ';--a o--1'4

Figure sho\l's a dgid body of mass m having radius nl' gyrarion k ahout iL~ centre of gravity. h is to be replaced by an equivn len! dynamical system of 1wo lllasscs placed at A and B. Titc mass ar A should be

o :x m n,

tt+b

b. b XII/

a +b ,, a c. ---3 I>

Ill " d. - o<-

2 " f= 3 (n - I) - Jj. In the Grublor's equarion for planar mechanisms glven.j is 1he

a. Number of mobile links

b. Number of links

40.

41.

42.

6 of Ill c. Number of lower pafrs

d. l.ength of the longest link

Which of the fitllowing ure example~ of forced closed kinemaric pairs ? 1. Cam and roller mechanism

2. Door dosing mechnnism 3. Slider-crank mechanism 4. Automotive clutch

mechanism operating

Selecl lbe correct nuswer usiug !he cotles given. below

a. t. 2 and 4

b. I and 3

c. 2, 3 anJ 4

d. 1 , 2.3aud~

I. * 2. ~

/) 3. (7

.33 Which of lhe mechanisms shown above do/docs not ha ve single degree of freedotn?

a. 3 anJ 4

b. 2 aud3

c. 3 only

d. 4 ()t1ly

~:' '"'' ;;; ' \

---' A Ill ' t I

' l

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44.

Two poi•ns. A and B located ul<llt& the radius of n wheel. as shown in the figure above. have velu~ilks of 80 and 1~0 mls. rcspecrivcly. 1'hc distance bclwccn points A nnd B is J(}() rum The radius ofwbcel 1s

a. 400 mm

b. 500 mm

c. 000 01111

d. 700 mm ln a sl ider-crank mechanism, the wlocity t)fpiston bi:!<<~mes maximum when a. Cru11~ nud connccling rod are in line

wuJ• each or.her b Crank is perpendicular to the line of

stroke of the pi;lon

c. Crun~ and conncctillj! rod arc mutually perpendicular

d. C:Nillk 1.s J 2011 will• the line ofslrokc

R

3

R

0

p

0

p

45.

46

7 ur lb Three positions of th~ quick-retun1 mechanism arc shuwn ub01e. In wh ich or lhe ca~s docs the Coriulis C<lmponcnt of accclcralion cxisl 'l SdeCI the correct answer using the codes given below : a I ()nly

b. I and 2 c.. J.land3

d. 2 and3

..c_:__:> I I) N

The "bow figure shows 11 ci•·cular disc or I kg mHSS unu 02 01 radius undergoing unconstrained planar motion under the action of two forces a~ shown. The o1aguiwdc or angulur acceleration o: of' the disc •s a. 511 rad/s1

b. I 00 radlst

c. 25 radls1

d. 20 radls' For n ~lidcr-crank mcchnni~n1 with radius or crank r. length of connecting rod /. obliquity ratio n. LTnnk rotating at 1111 angular vdnuity 111; lnr any nnglc () nf the crank, malch L1st I (Kinematic Variable) with List II tEqu:ll>oo) 1111d select the co~cl answer ; Us11

A, Velocity of piston B. Accelenuion of pislon

C Au gular vcloeil~ of connc<-tlllg rod D Angular occclcmlion of cm\necling rod

Lis t 11

2 , ( cos20) nrr. cos8+-n-

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3. ' m· . (J

--.Sill 11

4. ( sin2B ) blr Sill (J 1 -1-1

-

A I) c ()

n, 4 1 3 1 b. 2 4 3 1 c 4 2 3 d 2 4 3

C:

.. ;;;;;

Figure shows Klcin·s construclion lor slider-cmnk m~chanism OCP drawn lo full sc~le. Wlull velocily doe.; CD represenl?

u. Vcll>city ol'lhe crank pin b. Velocity of the piston c. Velocily of th~ piston with respect to

crnnk pin d. Angular vclocit) of the CQnnccting rod

48. rhe mn,lmum lluclumion of energy Er. during a c •cle lor a llywhcel is

49.

a I ( '";_ - #J;111 )

b. ~J,1u,. (~»,,.,. -w_)

c. X 1x ... (1) ••

d. f .IJ)~.J..

1 where f = Mass mNncnt oflntrtiu of the tlywhccl

w,. = i\ vcragc rotational speed K., = Coef:ljcicnt of tlucwation of speed)

For m1nim1sing speed lluCIUlllions t>f an engine il.~ n prime mover. ll must hav" 11. Only u fl) wheel littl'il to the cranks hull b A govcmor providctl m !he system c. lloth a 0) wheel aud a g<w~rnor

provided in Lh~ system d. Neither n llywhecl nor n governor

IS uf lb SO Effect of friction at lhc sleeve or u

~enlrifuguJ govemor i~ to make il

51.

52.

a. More sensitive b. More stable c. Insensitive over a •·mall runge of speed d. Unstable

•\ ctrcular disc having " mass uf 30 kg is mounted '')'mm~tric!dly bulw~~n two bcann~s A and B as shown above in !he figure - I r is used as an ro~enlric crun with an eotelllrkity of 0.(}1 m. If the shaking Ioree on e~~h or the bearings is not lo exceed 1500 N, the speed of rotation of the cam should not e.xcced a. 10rocVs b. 100 radls

c. 70.7 rudls

d. 1~0 radls

Th~ uiliii'C ligurc shows llld ~chcmmic diUfP1lll1 of nn IC' engine producing a tOrque T = 4{) N-m at the given instanL Th~ Coulomb friclion cocOici~nl belwccn the cylinder rutd the p1ston IS 0.08. If the mass of the piston is 0.5 kg and U1e crank raditL~ is 0.1 m. the Coulomb friction force occurring at the pi~wn cylindo;r imerfac<! is a. 16N

b 0.4N

c. ~ N

d. IMN

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5J.

54.

55.

56.

Consider the folio\\ ing r~gardfng avoiding ~1c

between gears :

tnt)(!ificmions imcrtcrence

L The ccmre distance between meshing gcurs be iucrea.-etl.

2. Addendum llf th~ genr be modified.

3. Tcctb sbottld be undercut slij;htly at Utt rooL

~ . Pressure angle should be incr<'11Scd.

5. Circu lar pit.ch be 1ntrl"a<cd.

Which of rhcsc a,-., ciTec-ti "" in avniding imcrfcrcnco'!

a. 1. 2und3

b. 2. 3. ~ and 5

c. 1.4 and3

<1. 3. 4 and 3

lu a ruvencd gcnr train. lwo gcurs r und Q are m~shlng. Q-R i~ u compound gear tmd R mtd S ar~ meshing. The mouulcs of P ami R arc 4 mm and 5 nnn rcspectivt>ly. !'he numbers of teeth in r•. Q and R are 20. 40 auu 25 respective!) . llte numbcr of ICCtb inS is

a. n h. 35

c. 50

"- 53 When 1110 spur gears having involutes prolile~ on their teeth tngugc. the line of olclinn i$1nngen ti:tlto l.h~

a, f'itch drcle:-

b. l>edcndum circles.

c. i\ ddcndu111 circlc>s

d. 13a~" circles

lf tht tmnular wheel of an opicyclic gear train has I 00 teeth and the plane I whod ha; 20 teoth. the numtl<r or tee.th oM the sun whed ;~

u. ~0

h. 6()

c, 40

tl. 20

57. the piston rnll nnd the crosshe11d iu • s team engine nrc usual ly connected by means of

a. Coucrjoint

511.

59.

'I of JO b. Knuckk joitll

c. Ball joint

d. Un ivcrSlll.iloint

A rh·ctcd joint has hcl.!n -.ksign~d ro suppon an eccentric load P. The load ~enerates '•lue <>I' F 1 equa.l tu ·I kN nod F, equal to 3 kN. 1loe cross:section~l area of each rivet is 500 mn1·, Consider the following sl!ltumonll;:

I. ntc str= in the rivet is 10 N/mm1•

2. nu, value of cccenlricity L i> I 00 mm. 3. The ' 'nltiu oflond I' i; 6 kN.

4. ntc resuliant f'nrc~ in \lllch riv~l i5 6 kN.

Which of these Stmements arc correct'/

a. I and 2 h. 2 and 3

c. 3 and 4

d. I and~

M:uch List I (Phenomenon) with List II (Significant Pw-amcters/Phenomenonl1l11d sd c<tthe ctmect answer: Usl l

A. Jmcrt'crcnce fit B. Cyclic loading

C. Gear meshing

U. Lubric•ting of bearings

Li~t II J. V isoosity index

2. hucrrerence

J. Notch sensitivity

4. Induced compressive .stress

A B c n

"· } ~ I J

b. 4 J ~ 1

c. 3 ,, 2 I

d. 4 3 I 1

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60.

6L

62,

63.

The hemispherical end oh pte$sute -.es•el ls fastened to the cylindrical portlon of lllo pressure vcs•cl with the ltclp of gasket. holts •n•llocl. nuts. The bnlts nrc subjected to

n. Tco:nsilcslruss

b. Compres• ive stn:.•

c. Shear st~s

cl Bc:.1ring stre•s

For bolts of u11iform stn:nglh ~'" $lmnk diameter is made eqrn~ltn

>- 1\lbjor dinmclor of threads

b. Pitd1 dinmctcr oftlu..,ads ~ I\ fin or diameter of U>reads d. Nominal diameter of thread•

Match List l (Device) with U.t [I

(Component Access<>ry) and ~elect the ~rrect C1JlS\VCf :

l, ist I

A. Lifting machine

B. Fibt\0 rope drive

C. DiiTomnlial geat

D. Belt drive

J.i<l II

I. llll"r ofjockl>y puUcy

2. Sun wheel

3 Sheave

4. Power screw

a. h.

c.

d.

J3

4

4

3

c I

2

2

D

2

J

2

A pulley is connc;:.tcd lo a power u'wsmis.~on ~bon of di•mot<"· d by meanK of n rectangular sunk key of width w ancl lc:n.gth L 11te width of the key is l.>k<:tJ as d14. For full powor l!ansmi~s ioo. the; shenrin~ slretHtth of the kev is equal to the torsion;;) shearing slrengti, of the shall. The ratio of the length elf the l..ey tu the din meier oflbc shofi (11<1) '"

a. n/4

b. 111 ..fi c. n/2

64.

10 ul I I> d. ll

A circular solid rod of diameter d welded to • rigid nat platu by a circular .fillet wold of throat thickness t is subjected to • hvts&ing momeol '1 . The maximum sheal' slress iuducc:u iu the " eld is

" · l'l:t~td~ b. 21'/ntd~

c. ~'I/xtd~

d. 2Tintd·'

65. A 6 • J9 ropo implies that U1ere are

a. 6 wU·cs in each ~trand itud J9 ~l tn11ds in the rope

b. 6 slnlnds and 19 win:. in uoch l>U;tlld

c. G lart~e diameter wi•·~ nntl 19 $mall di.3mctCJ' wires;

d. 19 lnrgc diamclur wi;"" tmd <i small di.tunc~tct wires

66, Considtt tl1c li1U11wing statcmen~

I, J.'h·wheel and gO\·emor of an 011gine a~ U1e e.xa mples of au op"" loop cootrolsy•l"'n

2 Governor is U1c example of closed loop control system

3. Tl1c Ottnn<JSL>tc or • refrigerator and relict valve of n boi ler ore the e.'tomples of closed loop eontrol system

Which of th"'e sutcmcnh israre oon·ecl?

u. l only

b. 2 and 3

c. 3 Only

d. 2 mtly

G7. In ~ multiple disc elutcl1 lf nt and n, are the number of discs on tho drivinl! and drive.n shofls , re•peotively, the number of pairs oJ contact suditces will be

•• n1 + n2

b. "' _. n'l I

c. OJ 1 0 2 I I

d. n, +oz 2

Gg. Mo t~h List (\rears ) with List II (Configurations) and select \he correct. a.n.s-w...::r :

L.ist l

A. Spur

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69.

70.

13. Bo>ve]

C. Helical

D. M iw 1,;,1 n I. ronnecting two non-pnr:!llol or.

intersecting but CC•planar sh• fu..

2. Connecting two parallel and coplnn:u-~hafls wiUt t~cth parullel to the a,, ;, of U1o gear wh"'-'1

3. Connecting h•'o P"'" llel and coplanar sbnfts wilb. teelb. indiued to Ute axis of the gear wheel

~- Connecting ti< O shoft.~ whose a«c• at<> mutually perpendicular Ill coch uthco•

A B c D a. 2 4 3 l b ~ 2 4 c. 2 ) 4-

d. J 4 2 l

1\vu .<ltaJls A nud B in !be •ame ~tra ighl

lUte arc gcan:d togt:thor tltrough .Ul

int.mnedl:tte porallel •h-aiL Tlte parnm..ters relating to tbe geao .. and pinions are given ln the table ·

!lorn S.-i Teelh PCO Mod til~

Onvttl!< wheel A N, r. o. m

Driven whc-d B Nu LA D. m Dllvcn wh«f C Nc Tt De '" D1wtng. whc-d D on the rntermcdia!~: N" To Du m shaft. m onesb with B

\Vhicb of Ute following o'CI:•tions is not v~lid tor kinematic design considcutlons 'I

•• ~ Tr . .!D. '-l8 T, T0

b. N. = T, rn :-.. 1~ T0

c. I) A- n c = Dn ~ Do

tl. T,. • Tt = Tn Tv

nte geal~ employed for CO!UteCting two non-intersecting and non-pnraUe~ te .. non-coplan>r sh• fts are n. Bevel gcant

b- Spir.t l sear-s

71.

72.

7:>-.

74.

75,

76.

11 of I (I c. HeliC41 gean1 d. ~litre gcoos

The ro lling_dlemt nl bc:.1ring> ar~

a. Hyd'roslatic bearings

b. Squeeze tilm beating>

c. Anlifriction bcru·iugs

d. Gret~se lubrie.-ttion ~rings

llntloe mntors •vith low $larling torque. the type of Lhe clutch to be used is a. MuJiiple-plalc cltuch

b C'one oluteb

c. c~ntrifugnl clutch

d. Single-plate clutcb with btJth side<; cl'lectivc

Whiclt one t)l' the followmg is nul • friction clutch?

u. Disc or plotc clutch

b. Coate dutch

c. <.'tmtrifug:~ l clutch

d. Jn\v clutch

Two-dimensional sblc of stress nt a point in 3 pl,anc s tn:sscd elemanl ill represented by a Mohr circle of7.ero radirc•. Then both priucipal s~·esses

11. nre equnl to ?.em h. :tre equal 10 zero :md slu.:ar sl reM!4 i~

al~o et1unlto ~c:ro

c. nrc of eqtm I magnitude but of oppos ite s ign

d. are of equal mogniturh< and of ••m• sign

Which of the lh llowing m:.t~Al• generally cxhibi~~ a yield point'/

n. Cast iron

b. Arutealcd and hot-rolled mild slocl

c. Son brass

d. C'old-rolled •teel

A cube having ench side of leng~1 a. is CIJMirnincd in is all directions nnd is healed uniformly so that the tcruporature i• r.~iscd to roc. Jf fL is tho lltc:>rmal ccefticoenl of cxplnsion of the cuhe material and I~ the modulus nr e lasticity, Ute slr.:ss do:wloped in !be cube is

•. ·~1'F. y

b. aTE '(I 2y)

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7M.

79.

so.

Sl.

c. aTE /2y

d. aTE /( I +ly)

A simply sunponed b~•un has cqunl owr­hunging lengths nnd cnrrit!l. "qual cunccntnued lllnds P at ends. Bending moment over the kngth between the suppons a. is zero h. I ~ 8 1-()IH'd<l COitl)l::U,I

c. vanes unilbrmly lroon one suppon 10

the OlhcT

<I i.• maximum utmld-span Consider the lol l owing stntcmcnts : In n camilcvcr subjected to a CQ11centrutcd load at th~ free end

I The ~nding stress is maxim11111 nr the fi'ee end.

2 The maximum shear strc'Ss is constam along. the length of the beam.

3. The slope of the clastic curvo is ze1u al the th~d end.

Which of U1csc slntcmcnl.< rut correct'!

a J.!IDJdJ

h 2 and 3

c I ;md J

d. I and2

nc shear mess distribution over a beam cross-section is shown in thn figure above. l'hc beam is of a Equal flange I -section b IJncqual nnn:,w !-section <:. Circular cross-section d. ·1 -section

Slendemcss ratio 11f a colu111n is defined as the ratio of i~ length to il' a. Lc!ISt; rndms of gyration b. Le-.tSLIUl~ral dimension c. Maximum luteral dimension d. Max1mum rudius of gyration Wbich one of th~ lbllowing r~irS 1s nul corrtclly matched?

82.

84.

85.

l ~oflb

a. Poi11t detect in crystal lmti~-c Sdf imer>itials

b. I incar defect in crystal Janice . Or"in boundary

c. Planar dclcct 111 crystal lanhJt Fxtcmal surface

d Volume defect in .:rystal lauicc ; Other phtt'C~

A screw, dislocation

I Lies pamllelto its Burger's wctor 2. Lies perpendicular 10 il' Burger's

vector 3. Moves in a perpendicular direction to

1h~ Burger'> vcctnr -l-. Moves in an inclined ditection l<> the

Burger'~ vector Select tbe correct answer using the codes given hclow

a. I and -1

1\ I and J

c. 2 rutd 3 d. 2and4 Accurding to Gihhs · phot~e rule. the number vr degrees or ti'ec.dnm ur an culectic pomt in n binary system is a.

b, 2

c. 0

d. 3

An onhogonul cuttin~ op.:ration is being ,'tlfl'fed out under the following •~mditit•ns

culling speed = 2 m/s. tkplh .~r c.ul e 0.5 mm. chip thickncs:< = (Ui nun. Then the chip velocity is

a. 2.0 mls

h. 1.-t m/s

c. 1.0 m/s

d. 1.66 mls

The angle of inclfnalion of lhc rnke faL-e Wilh rc>flCCI tO lhc hKll ba..t lll<"ilSUicd in H plnne, perpcndiculnr to the hiiSc and paralleJ 10 the width of the tnol •s called a. Back rake angle b, Side rake angle

c. Side culling ~dgc angle d. End cutun~,t edge angle

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86. The cor=t sequence of cutting tools in tho nscending order of their wear reslsL,noe i.~

R7.

~8.

tt HSS-0.~ nnn-femms 31loy (Stellite}­Carbide-Nitride

h. Cn.•t non··furrom; allny (Stoll ito)·llllS· Carbide-Nitride

~. HSS-Cast non-ferrous alloy (Stelllte)­N itriclc..Carlndc

<I Cn.~t non·ferrQus 11l1<1y (Stellite)­C:lrb ide-N'it.ridt>-I-ISS

ln orthogonal cutting test, the cotlmg force = 900 N. the thrust force = 600 N' anti ehtp shear nnglc is 30°. Thou the chip •h= force is

"· 1079XN

h. %9.6 N

c. 479.4 N

d. 69.6N

llto time tnkcn tC) fucc a \\ (n k llicce of 72 mm diameter, if the •pindlc •peed is go r.p.m. and <'TO.s-1\:ed is tl.~ mmlrev, ill a. 1 .5 minlltC-'1 b. 3.0 minutes

.:. 5.4 minutes

cL S.S T)linute.

89. rhe pu.rpo~c of he!ieal grooves in u twist drill is ttl

I. Improve tbe s tiffness ,

2. Save a tool mar.,rlal .

3. Provido s pace lo r chip removal

-1. Pnwlde rako angle for Ut~ culling edge

Select the correct ~.nswer usmg lhe codes given below :

"· 1 nnd ?.

b. 2 •nd 3

c. 3 nod. 4

d. I 3nJ ~-

90 Which one of lhe following is nol n ~ynlh~l ie obra~ive nl31erisl7

n. Silicon C.:~ro,de

b. Aluminium Oxide

~. TJtrmium Nittidd d. Cuhie B<1ron Nitride

9 1. In mi lling m~chine, the wUing tool i$ held in position by

92.

93.

9.& ..

9$,

13 oll li n. Chuck

b. Spindle

c. Arbor

d. fool holder

A spur se•r of 40 reetlt is mnohined in " gear hohbing machine using a dm1hlc 51Mt

hob cu11c1'. ·n,c speed ratio bclwccn lhc. hob and Ute blunk is

•• l : 20 b. 1 : 40

c. -10 : J d. 2(l : J

M1 lob List l (Mnt<~ials) wltlo List II (Machining) and select the corrrot ans\va~

List I

A. Madtin ing ol'~cmducting m;tterial~

B. Ruby m(i

C. Electrol)1"

D. Abrasive slwry

Li>t II

1. EC'M

2 . EDM

3. l!SM

4. LBM

A B a. ~ 2

b. 4 2

c. 2 4

d. 2 4

("

3

~

Cold working produces atTects:

))

J

3

the fo llowing

I. Stresses nre set up in the met.• I

2 Grain strucluto get• dis lortod

3. Strength and hardness of Uu~ mct.'ll are dccrc4scd

4. Swf:tcc finish is rodu=l

Which of theSe stotement:< are com."Ct'l

~' · l11nd 2

b. 1. 2 and 3

"· 3 and 4

d. land 4

A goning r;>tio nf I : '2 : 4 is used to dC!iign Ute g•ting sy~r"'" ror magnesium alloy CJISting. ll1is sating ratio to tbe cro$s·

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97.

section Ote3.8' Ol1 the various g-.,ting

elements •~ given below :

I. Down spn1e

2. Rwm~r bar

3. lugt.tll:S

l'he correct ~cqucn~c of the ohO\"e elements in the rntio l . 2 : 4 is

n. 1 ~2 ;and 3

1>. 1. 3ond 1

c. 2, 3 and l

d. 3, I and 2

i\latcll L.ist l (Products) with List U (Casting proee&S) and select the cerrecl answer :

List I

/\. Hullow ~tatues B. Dentur<:s

C. Alunlinium aUoy pistons

D. Ruekt:~· arms

l,ist n Centrifn~al C:t~ting

2. Jnve:stmcnt C•sling

3. Slush O.stin!'

4. Shell Mouldin&

5. Gr•vity Die ('osting

A fl c .. 3 2 ~

I>. l ] .\

c. 2 3

cl. ' _, 2 5

()

5

5

4

4

l\lfutclt Lilli f (Welding Defects) with Li•t n (C~u~es) nnd select the correct nMwer :

L,i,t T

A Sp<~ller

B. Distortion

C. Slag in~>luston Listll

I. Damp electrodes

:Z.. Arc blow

3. Improper cleaning m m11llipBSil \1 elding

~ . Po<>r joint •election

.\

4

B

2

c 3

D

1

98.

9?.

b. c.

d.

2

4

4

I

3

3

3

l l ntl tl

.High speed eleclron beam ol' electron b"""' welding is foeu•..d on U1o wdd spot u•ing a. v acu1m1 ltns

b. Inert gas len.<

c. Optic.,llells

d. llillgndic len~

In rcsisl4uoe \•clding. hcnt is gentl"nl..d due to U1c r~11istoncc bctween

a. Electrode aud "orkpicce

b. A<peritie.< between touching t'lates

c. Two dissimilar metals being in eontact d. lnlemtomic forces

LOU. A forging m~tltod fot• t'cdudng thu diameter of a bar >nd in the process making it long.,- b tem1ed as

a. Fullering

b. J>uuclting

c. llrsetting

d Exlmding

101. Con~ider U•e following steps in forging a connecting rod from lite bar sloe!< ; I. Blocking

2. Trimming

3. finishing

4. Edging

Select 1he cotTecl sequence of ihesc op<::rution.< using the cudeo given h~low;

•• I, 2, ~. 4

b. 2, 3, 4. l

c. 3. 4. l. 2

d.. 4. 1.3. 2 102 'l11e extmsion proce•s(e:s) used for lhe

product1on of tooUtpaste tube is/are

1. Tube e.xlrusion

1. Po1·ward estrusiOtl

3. lntiJaCI <>Xb'US ion

Select tl•e co1·rect answer using tl1e cmles giveu below :

a. t only

b I and ?

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d. 3 only

103. A drculor shalt subj<'CI<\d w tWJSUng monwnt r~sults In ma>tlmum sh<'tir .slJ'css uf 60 Ml'u. Th~n the mnximum compressh c ~tress in the material is

o.. 30 MPa b. 60 Ml'n

c. 90 Ml'A d. llOMPo

I 0-1. Un~·hnl r length of 50 mm diameter steel rod is solid while the remaining half is hullow having u lx>rc of25 mm. The rod is subjected to equal and opp<1sitc torc1ue at its euds. It the maximum shear stress iJl

solid poni,)n is T. the maximum sht':lr stress in the hollow ponion is

3. tl5116lt

b. t

c. P/Jit

d. ( 1611 5) {

105. A thick cylinder with internal diumeter d and <!utsiJe diameter 2d is subjt-c.tcd w internal pressure p. Then lhe mnxfmum hoop stres.• de,elored i11 1he C) Iinder is

a. r b. (2/3) I'

c. (5/3)p

d. 2p 106. I h~ \Oiumeu·io slJ'ain in cn;e t>f a thin

cylinJrkul shell ur diam~tcr d. l.hickness t. subjcck-d to internal pressure pis

a. pd .(3- 2p} '21£

b. pd .(4 -3,11) JLE

prJ c. 4r£·l5 - 4J.L)

d. pd_.(-1- 5J.L) 41/;

(where £ • Modulus or eln•ticlty. p • l'ni:;son's ratio for the shell n'Ullerirtl/

1117. ·nw otnn,nunly used technique of stl>:ngthening thin p1·essure vessel i~

a. Wire winding

b. Shrink fitting

15 o f II> c. Auto-i'rcttagc

d. Multi-layered construction

I 08. Under axial loa.J. earh section of a close­u,ih:t.l htlical sprin~ is subj~ctcd 1<1

a. 'fcnsile stres.' und shear sLrC$S due to lnnd

b. Com()(t:ssivc stress nnd shear stress due to torque

c. Tens ile stres.' end shear stress due ttl torque

d. l orsionaJ and di1'1Xll sbeor stresses IO'J. A lln•· having lcn!'cth L nnd Uniform cross­

~cthm with area A is ou~jectcd tn b<1th tensile Ioree P ood tor<]ue T. If G is l.hc shear modulus and I! is the YoWl!\S modulus. the internal st rai n tnergy sti ll'cd in th.e bar is

r ' '- ~-''L a. --+-2GJ 1£

'b. r'L f' ' L --+-OJ lA.L

u. 1'1 L 1''1, --+--'lGJ :ME

d. T I. ,,~ I. --.,.--(/.! I F.

11(1. Toughncs.~ f<•r mild steel under uniaxial tens ile looding is given b) the shaded poni!ln Ill' the stress-strain diagram as shm111 in

a.

i~ - · b.

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d.

Fraal'urc

Ill Monel metal is an allo) of a. Iron nnd corbon

b. Copper and zinc c. Aluminium and copper

d. Cupper and nickel

112. Primaryobjectoflull annealing is lo

o. Increase toughness and y ield poinl

b. Reduc~ ductility and rcsilicucc

c. Remove tbreign impurities and improve •urfuco tini~h

d. lncrea,;e ductWJy and macbinahilil y

113. Globular limn of <-emenlil< in lbe struchare of steel is Obtained thruugh

a. Nonnalfsins b. Malleabilis iug

c. Spheroidising d. Curbonising

114. Gunnwtol. 1vhich is used in j ountal bearings, u1n1nins

a. 88% Cu. I 0% Sn. 2% Zn b. KO% Cu. 10% Zn, 10% AI c. 85%Cu.5%, Mg. 10%/\1

d. 85% Cu. 5% Sn, 10% Pb 115. Tbe cofn!.ct sequ~<uce of element> or 18-4-

1 HSS tool is

a. W. Cr. V

b. Mo, Cr, V c. Cr. NL C

d. Cu. Zn. Sn

Ill>, Ienon ~' n a. Thenuoscnia~ lluorocarbon polym~r b. Thcrmo-pla<[ic Uuorocarb1111 polymer

117.

16of lb c. Inorganic compound of nuorioe nod

mrbon d. l.nminnlcd phenolic material In the case nf ntbhcr. vtllcnniY.ntion rclers to U1c process of producing n a. Linear polymer

b. Bmnched polymer

..:. Cross-linked polymer d. Net work polymer

II ~ . Polyesters can t>e defined a.< rhc condensation pr<)thll\tS () f

a. Dicarbos.}l ic acids with dihydroxy alcohol$

b. 13isphcnoi-A nnd cpichlorohyrlrin

c. f'heool and fonualdehydrin d. Benzene nnd toluene

IIY. l11e coordination numher for rCC Cf)Stal structure is

a. 4 b. 8 c. 12

d. 16

120. Match Llst I (Crystal StnJcture\ wilb Lisl Tl (E.xumplc) und select the correct 1mswcr: Li,1 )

A. ' impte Cubic B. Body-centered Cubic

l'. F<Jce-centered Cubic D. Hexugunnl Close Packed Lis t ll

I. Zinc 2. Copper

3. Alpha iron :u ro0m1empcrnnue 4. Manganese

A [l c D

•• 4 3 2

b. 4 3 2

c. 3 4 2

d. J ,, 2