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I .E.S-{ORJ) 2()06 I ol IJ

MECHANICAL ENGINEERING J ~-==~

2.

3.

-l,

PAPER·II In tt queuing problem. if Ute arnvals are completely random then the probability diStribution of number llf arrivals in a !:iven time follows a Poisson dtsrribunon b. nonnal distribution c, binomial distribution cl e.xponential distribution Cousider the following statements m respect of assignment method of opti mization : I The ttmtrix format of the meihod must

be u square mntrix ~ Some type of raring has to be given to

the performance of each pairing Which of Ute statements given above is/are corn~ct 'J a Only 1 b. Only 2 c. Both 1 and 1 d Neither 1 nor 2 Which one of the foUowing is not the solution method of transportation problems ? a, Hungarian method b Northwest comer method c. Least cost method d. Vogel's appro~;matioo method In a linenr progranuuing problem, if a bustc solution has no mora tltrut m positi,•e ~ (J = I. 2. n), it is called a. Basic feasi bl e soluti on b Unbounded solution c. Non-degenerate baste feltsible solution d. None of th.e above CotJSider the following statements in reSpect of PERT and CPM: I PERT is event-oriented while CPM is

acti\ lty-oriented. 2 PERT is probabi listic while CPM is

determtnisllc. 3 Levelltng and smootlmtg

techmques related to scheduling in CPM.

are lhe resource

6.

7.

s

')

1().

Whtch of the statements g•ven above are correct? a. I. 1 and 3 b Only I ru1d 2 c, Only 2 and 3 d Only I and 3 In case of solution of linear programming problem using gtaphical method. 1 f the constraint line of one of the non­redundant constrainrs is parallel to the objecli\'e function line. then it indicates a. an infeasible solution b. n degenerate solution c. an wtbound solution d. a multiple number of optimal solutions Whfcb one or tlte .following statements ls correct'/ Standard time is obtained from normal ti.me by adding the polic) allowance :vtd a. personal allowances only b. fatigue allO\\SJtces ouly c. delay allowances only <l persouul. fatigue and deh~l' allowance~ Wh1ch one of the following is no( a technique under Predelen11lned Motion Time Sysrem (PMTS)'! a. Worl factor b. Synthe1ic data c. Stop,latch lime study d. MTM Wh1ch one of the follo\\ing tS not a necessary infommlion input to Material ~e<t uirements PIWlning 'I a. lnventoty on hand b. Bill of matenals c. Sequence of operations on a job d. Master production schedule (MPS) If lh.e annual demand or rut 1tem becomes half. ordeti ng cost double. holding cos1 one-lbur1h and lhe unit cost 1\vtcee then wlw is the ratio of tbe new EOQ nnd Ote earlier EOQ'I

I n.

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12

13.

l4

15

l6.

I b. -:5 c. .fi II. 2 In the ABC method ul' invcntm) ' ~"mtml. Gtttltp ;\ coustitut<lll ctlslly ilcm.•. \Vltal ;, tb~ u.•ual t •~-rccnl•ge uf such item• uf th" wtnl items • o. It) In 20~. h. 20 In 30° .. c. :ltl to 40~ .. d 40 to50~ .. Which I)OC of tile folio\\ ing •~ an invc-nlor) system Utnl keet"' a running record of lite 11mount rn otorage and rcplenishe,~ the stock wben il drops to ~ certain lev~l by ordering a fixed quantity·~

"· EOQ h. Periodic c. Peripherol d. ABC In • network. what,. total float equal to 'I a. u--r., - !1ST, + h j

b. EST; - l.f'Tt - 11 1

C.. 6STJ- LF'T1- 1;-- 1

d. LFT;- E'.STt - 11 -1

where, L.I'T : latt:.~( t'ini!b time of an activity: EST : cat'liCl!t swrt tune of •n u~tiviiy~ ~+ = time of activity i-j . 1\ l~nufacturing • product requin;• procc-s.;ing on tour nucbincs A. B. r. T> in th" order A- B- C- 0. 'The e<!t"k•itics of fnur rnnchines ure .\. = 100. 13 = !Hl, C -120 and D = 1 ~0 units per •hill If the expected output •• 90" o nl' the system .:ap•cit). tltcn wb•t ~ Ute expected outtlut1 n. 90 unit& b. 99 units c. 108 units cL 117 units If the total investment "' 1{9. 5.0ti.0U(\ for a tat:g<t production. tlte income for th~ <>urrc'lll year "" Rs. 3.00.000 ond total opor.~ting cost i~ Rs. 1.00.000; whnt jg the economic yield ? • . It)~-

h. ~I) •• o c. 21) 0 o d. 41)0o

ln • Mohr·~ cu•ck. th" radius of the cil..:1" is lal.:en as :

17.

18.

19.

20.

,, c. ~ l a, 2a,,_(r~ )'

d. J( <T <T, )' ( r., )1

where, a ,. and oi~ are norma I stresses along X and y direcltons respectively. and ~"Y is thesllearstrcss. DistupGw str~::ngth is Ill;; u1a:cim um strength of • metal whe-n a. subjected to 3 principal tunsilu stress""

at right angl"" ln nne another and of equa l maguitude

b. looded in tension c. loaded m compression d. loaded in shear

E. G. K •od Jl roprt:Sttttt Ott clastic" modul11s. liltenr modu lus. bulk modulus and Poi.~son 's ratio I'CI!pectivell' of • llnearly elastic. isotropic and bowogcn\!-OU~ ruutc.ai al. To express the slress·stra in relations completely for this n•alerial, atle.151

a. E.G ond I' mu.<t b10 lmown b. E. K ~nd !t must be l.:nown c.. 3ny two of the four must be known d. All the roor rnU.<I be known Princip~l str~ins M a point arc I 00 I 0 • and - 200 • 101

• What Js the m.:~;<Imum shoar •lraln Allh» point ? a. 300 lO ... b. 200 10 .. c. 150 JO-" d. 100 10 . A molal <Od i• rig.ldly r..~ed ot its bulb cnW.. The lampcrnture "f tltc rod ill increased by 100°C. If the coefficient of linur expansion nnd ~lastic modulus of the. nu:t;tl rod arc 10 w·6f"C •nd 200 GP;o rcspo:ctively, then whnt is th~ wit-e-. procluced io the rod ? a. 100 MPa (tensile) b. 200 1'>1Po (tensile) c. 200 MPa (compressive)

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21.

11 .

23.

24.

d. !(){) MPn (compressive)

Figure shown above represents the BM diagmm for a simply s upponcd beam. The beam is s ubjected to 1vhfch one of the following? a. A concentrated load at its mid-length h. A unifom1 ly d iSiribut~d load over it•

length c. A couple at its mid-length J. Couple at 114 of the span from each

en<.l Which one of the following statements is COITeci ? Beams of unifom1 strengd• vary in section such ~181 a. beudiug IUOUICnl re maius constant b. detlectiou remains constant c. maximom bending stress remains

<'Oustant d. shea!' Ioree remains constant In the case of beams with circular c.ross­section, what is lhc rat io of lhu maximum s:hear stres..~ ttl average shear ~tres..~ 1 U; 3: I h. 2: I c. 3 : 2 d. ~ : 3 What is d•c maximum rorque trausmitted by 11 hollow ~hall of external radius R aud 1nlcmul rudius r 7-

a. ~( R' - •·') f. 16 . •

h. 2!...( R4 2R

r')f.

c. ~(R'- r'}f. 8R . '

d. n( R' - r') 32 R J:

(f, = muximt1m shear stress in ~1e shall mnterinl)

.1ol U 25. Consider tl1e following s tatements nl given

point In the case of thick cylinder subjected to lluid pressure :

I. Rnd ial stress is compressive. 2. I loop stress is tensile .. 3. I loop stress is compressive. 4. Longitudinal stress is tensi le and it

varies along the length.

S. Longil\tdinal stress is tensile and remains consl.Ont along ~tc lcng~1 of ~'" cylinMr.

Which of the statemcn L' given a boVe are CUITCCt '/

a. On ly 1.1and ~ h. Only 3 and 4 c. On ly I , 2 and 5 d. \)n ly I, Jand 5

16. Matdl List - I with List • II and sd ecL the correct answer llsing.lhe code. given below the Lists : Li>'l· I (State of Stress) A.

B.

C.

D. -<-t-[}t+ +--

L ist- 11 (Kind of Loading) I. ComblrJed bend ing <md torsion or

circular shaft

2. Torsion of circular shall

3. Til in cylinder subjected. to internal pressure

4. T1c bar subjected lo tcnsik force A B c 0

a. 2 I 3 4 b. 3 4 1 c. 2 4 3 d. 3 I 2 4

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28.

29.

J()

What is the expression for the crippling load for a column of length I "ith one ~nd til<cd and othe-r ~nd fre-e '!

a. p = 2111£!

I'

b. I' = ,-r' Kl ~I'

4n1EJ c~ P -. --~-,-

p = n' F.l d. I'

~latch l.isl·l (Theory or Failure) with l.ist­!1 (Predict.<<! Ratio of Shear Slre!ls lo Direct Stress al Yield Condiliou for Steel Specimen) and 8eleel the correct nn.mcr u..•ing lhc rode given below the I .i~ls: l..ist-1 A t.bximum 8be:Jr •tre5s UJ<JOry B. MaxirnuJo "'"~•-gy dislortlon theory C. Maximum principni slre88 U>oory D. M:t.ximum principal strnlu lhCOJ'Y

List-IT 1. 1.0 2 0.77

·' · 0.62

4. 0,51\ A I:S l' I)

:L I 2 ~ 3 h. ~ 3 I 2

" I 3 4 2 u. 4 2 I 3 \Vhat is the slmin energy s lol\:d in • body of m lumc V with sln:ss a due lo gradually applied load '/

a. a-T! r

1>. trE' r·

c. ul·:

c ,I.

u ' l ' --2P.'

where, E = Modulu.s of Elasticily Gang milling i< a n, miJUng process for genernling

lurtagonal surf.1ccs b proe4lss of culling gc:.1"'

31.

33.

34.

35.

36.

37.

.. "' ,~ c. process Tn which two or more cutl'ort

arc used >imu I ran<:<>Usl ' d. milling operntlon combined with

tuming Which of the follo\\ in~ cannot b.; cut b)' hobbing pr'0"<:<!&7 a. Helic.1l gears

b. Bevel gea"' c. Womogean< !1. Spur gears It is rec,ui...:tl 10 <Ul screw threads with double srarl >nd 2 mm pitch o" a L~tbc h•viug lead •co-.:w pitch Iff 6 mm. Wlo11t t~ the •J>eed ratio between lad1t: spindle and It-3d SCf(!\V ? ., I ; 3

b. 3 ' I c. 2 : 3 d. 3 : 2 Which iwm bc.1 describes a CAM lechnol.o gy'l ~. Geomelric modelling b. Documentation c. DraJ'I.ing tl. NuntcrkJJI control Flcx.iblt manufacturing allol>$ tl1r: J , tool oosigu aud production b . oulomotdd design c.. quick aod iue.'<pt."115ivc p1'0duct c.haugo d. quality coniiol \VhiQh unc 111' tile fullowing i• the third ha•ic <()mp<Jn<lnl nf robots hesidc:s P'l" er SUIIJI I~ ond etJntrol (memory) CQusold1 a. Software b. CQli.Xial cable! c, Mccllanical unit Al'fll

d. Microcomputer Which of lhe foUowing is • singlo point cutting tool 'I a. Hack.~aw blade b. Milllng culler c. Grinding wheel cl. P~rliJlg lool Which of >be foltowin8 valul:ll of indox n is assoc.i:tted with carbide tool\' when Taylor"$ tool life equ;nion. V. '1'11 =consl:tnl is applied '! • . (),1 tQ0. 15 b. 0.21<> 0.4 c. 0.45 to 0.6 d. 0.65 to 0.9

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41\.

41 .

42

43,

fn the •election of optimal culling .ulnditioru;. lhe requirement <>f surl\tee tini.~h "~uhl 11111 n limit vn "hidl of 01c fiollowing? tl , ·n1c mnxi.mum feed h. Tbe maximum d~J>th of cu1 c. The m:1xinmm-speed d. The maximum number of pa.<scs Durlng ultrasonic m01chinrng, the metal removol i• •ehieved by n. high li.,..uc1)c.y eddy cum:nl< b. high frequenc) sound waves L'. hammering actiou or tthrasivc ptu1iC IC!s d. "'bbing ""tion between tcK>I tmd

wori-'piece Which of the following l~ an intertm:nce £it? a. Push fit b. Rmrn.iug fit c. Sliding fit cL Shrink fit The M nnd E-s~·slem in mctrolu.!Jy Ul'c

rd:tled to me:.surenn.-nt of : 11, 14crew lh-re:~d'i \l. Onlne.<;s c. •nttu lal'ity d . sutJ'u~eJ'mish

Coos ide< the following slolernenl'l I. A lnrgc fnbc angle lllc•n• lO"c'

~lrcngth uf the cutting crlg.e. 2 f'mting tnr<[ue decrca.es with rukc

>ogle. Which of the •l:lten•enls given ahove isf3re corr~t ~

,.,_ Only I b. Only 2 c. Both 1 nnd 2 d. Neither 1 nor 2 Whicb one ofihe follow ing i• • qualiloth-e technique of dem•nd foreC'Oisling 1 11. C<>m>lalion ~nd regression analy.is b. !\·Lovin!! average method c. Delphi teclmique d, ·E.~pontntiol ~moolbing CWlSidcr the following st.ntoments L C functions c.nn rctum arrnys. 2+ C JUnctions c::tn rctum functions+ ~ An -:.nay elemc.nL c.1n be void.

•I An array element can he" 'fimctinn.

45.

46.

47.

48.

~ofl3 Wl1ioh oftho •latem<mis given above i$/;u-e correct 'I a. Only I and 4 b. Only I and 3 c. Only 2 d. O nly 3 Which a no uf 111~ following Motem~"llls is not cornx.l for the oxponontinl smoothing method of demJind forecasting '/ 11. Demond f<Jr th.: most recent d•tn is

g.iVcn rnorc wcight•J!.c b. Thls ll)ethod requires only the cun'Cnl

d<'fllntlll •nd flnecnst demand

c. TI•i• med.od ••••sn.~ wei~l10 all tile pre\>ioU$ dula

d . 11Ji• method g.ivc< equal weighloge to all Ute l>oftOds

In an nssembly line. when the workst• tion times ore one<[u•l. the ovct:~ll production rntc or :m nssembly line i~ determined hy lite. : u. fash:st :;Us.tion tin1~ b. $low.:st sta tion tim" c. In)emgc-of all sblion t.imdi d. D\'Cr.ISC of slo w.:sl ond Wiest station

times M~lch L"t·l (Pomnneter) with r, ,s t-n (Dcfmition) and sclt:el the CiHT<:CI an~n\ cr U•~•g U1c ®c given l,lclow the LisL<: L i•t·l A. Total work content B. Workst•tion pmcess lime C. Cycle time D. 13alance decay l.ist·ll \. Aggregate o f nil the work elements to

bt: dune: Ott lim: 2. Line indiicienc~ " ltich ~ult• li•t)m

lhc id le lul1e due to imperfecl allocnt ion or wnrk ilm<Jng station•

3 . Time i•lletval hctween parts e<Jming off the line

~. Sum of the Limos or Uoe WOI'k dl""'cnl• done 31 o &lotion

h c. d.

A

3

B 4

~ d

2

c 3 3 I

l

D 2 J

2 4

Which of the following arc the nd,•anlltgCS of $Ubroutincs in u progr~m'l

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Titey rcdooc ·~~cuhon lome of the pro go .. m.

2 The} m~~• tho tlf'Ogrom m\1rc mainwin:.tblc.

3. l\lo~ulor d"' <lopmt-nt can be ..,11 ;~, 'Cd. ~. The} can be pommclco i.tc.J. Solc.:t the CorT''-"Ct 111JWCI' u~ing the: c;odcs !li\·en belOW" ~ Onh· 2and ~

b I. 2. ·' an41 -1 c. Onl) 2. ;l 3nd -1 d. Onh I ond -1

-19. Asst:rtoon (,\) : Sampling piJn> '"'" acccpt,'"CC number gTQicr than l.CtU are gen....-oll} beltcr 1hon .. mphng pbn' '"'h •ccc:vtan<-.: numbc:r c<Jual tu 7cnt Reason IRI Samphng plans wu h acceptance uun1bcr grc:rtor lh:.n z_cro 113\•c. 0 larger .. mplc <i7C a• C001f'3rcd lo Otmilar ~amp l lng plan§ Wtlh ac«.1JI~nc" number equal to ~cro u, Both A und R "'~ in~Jividuo llv lruc ond

R i5 lhc con·o.:! cxplaou11ion of 11.. h. Both .\ nnd R arc individually lrt~<' but

R i• not the coro·~cl e~lllnn11tinn of A. c. .'\ IS lrne but R L• fal~c d. A is f;o t.e lmt R ~~ iruc

~0. A~•t•f1illn (A) . Forj!tn,8 dio.~ arc prM ;,Jed with 111per uo do.1f\ ""81c• un \'Cllie<ol 111url'ac~.

Reown IR) • II t•cilil31c.< cmnplctc till ing of die o.avioy and fovnnhk !:''~"' ll(tw LL Holtt \ •nd R arc tndivoduolly lruc nnd

R Ill Ute CQn"Oct c:-tl>lanatinot of A. b. Both \ •nd R ore tlldividualh true but

R is no11hc correct .:.'lpiJnotion uf A. < A ~true but R '' false d A IS fa he but k i~ true

S I \ssertton ( \ ) • In Addotoon l'olymmlo'ltion method. pol~ mer 1> produced b) addmg a soc:ond monomer lo the firsl Utco o third monomer to !Ius do mer ond so on. ReHon (R) ·'I here must c:<i.<l ollcnl one double b<>nd in the monomer (.,.. Addition Pol}mcrWtion rc.1cliolh • Bolh .\ Md R arc uodivoduoll} lrue ond

R •• lhc cmn:cl C'q>lall.llion of' ' b . l!olh \ ond R arc ondivtduolly truo hul

R •~ nollhc C<>1'1'1>:1 explanation of A. c. A i; l.ruo ~ul R i• fa~<: d. 1\ i~ fol•c hut R i ~ lrue

6 " ' I' 52. i\ssertion (i\) ConCCJtric cyhmlri~~~

lteliC:l l springs ~re used 10 have i!TCaler spring forec on a limited >pace. Reason (R) . ComJculric hcli""l Sl>rmg, on> \\UUDd in opposite tJin:c.:liuns IO (Ht.:."\<CI11

lucking nf coils unci..- he•'"' d\11•mic loading. · ·

a Both t\ and R ore mdtvtdu~lh lruQ ond R il. lhc COI'I'CCI ~plan>lion of 1\.

b. Both . \.and R .,.., in<Jj, iduall1• true but R is not the CQI'I'OCI explanatto"n o( A.

c. A i~ IJUe but R IS fal<e d. A is false but R is true

53 Assertion (A) · In antt-fn:tion bcortng<. the fnctional resi.t.ance i> "'"Y lo\1 as lit~ sh.tft held by it r.1tuin• in nooling condihon by lhe hydrodyn;tmk rres•urc de\'eloped b) the lubricanl R~n (R) In bydtod~'llamk journal be•nns' h) drodynamic pro~tuH: ;., developed b=use of flow of lubriC:lnl in a convers ing-diverging channel. a, Both A and Rare indivodu311) true and

R is Ute coo-root Cl(pbll>lion of A. b. Both A •nd Rare ]JI(Iividuu lh tru.~ but

R is not the cooTect explnnolio.n ot .\

c. \ i.• true btu R ~· f~lltc d. A is fnlse but R i$ true

~4. Asserliim (A) · Crowning ;, pr(lvided nn the surface of • Oat pull~y to prownt ~lippinl! of the belt sideways. Reason tR) : Bell cro<.'p, w hich ,. tho rea•on fur slip oflhe bell •idew>ys, i• fully compensated by pro' id111g CI'O\\ninjl on lhc pulley. :0. Both .\.ond R aac individu>lh lruo nnd

R is lhe COf'lllCt explanation of .\. b Bolh A md Rare indn~duoUy true hul

R is not llte correct explan>tion of ,\. c. A IS IJUe hut K is false d. A is false but R is lflle

SS. AS$ortlOn 11\) Aluminium hu poor wei da hility. Reason (R) Aluminium luo high thermal conduetivil) ond htgh •Oimt) to OX) gen a Both A and R ;trc mdivulu>lh true and

R is lhe com.-cl C'lpl>oatimt uf A. b. Butlo A •ntl R 4JC individu>II) ltuc but

R is nolthe correct cxpbnotion of II c. /1. is true but R os false d. A is t:1lse but R is true

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56.

57.

58.

59.

60.

AssenTon (A) : In case of hot worklng of' m~tals. the temperature at which the process is linally StOpped should not be. above the recrystall izntiontempcroturo. Reason (R) : If the rrooess is stopped above Lhe ltti)'Stallizntioll temperuture, groin growtb wiU take plactl again and spoil I he aunined structure. a. Both A and R are individually true and

R is the correct explanation of A, b. Both A and R nre individu3lly true bttt

R is not the correct explanation of A

c. A is true but R is false ct. A is f.1ls~ but R is true

~

;;;;;on (A) ; Link A experiences Coriolis acceleration relative to the fixed I ink.

Reason (R): Slotted lin~ A is rota~ing with nngular velocity w nnd the Block B slide.s in rhe slot of A. a. Both A and R are individually lntc nnd

R is the correct explanation of A. b. B01h A and Rare individually true but

R is not the correct explanatiou of A. c. A is tJ'ue but It is false d. A is li~se but R is true Given J = 2, K = -4. A = -5. B = 0.4, C = 10.5 What are tl1e values of the FORTRA N variables JTP = J•K .- J••K. IVAL = A-< B-< C? a. 153 and 5.9. J•espectively b. -7.83 and 5.9. respcctivel)• "" -7.83 and 5, respectively d. - 8 und 5, respectively For t:nper turning on cenlr~ lathes, the m~thod of swiveling th~ compound rest is preferred for a. long jobs with small taper angles b. long jobs with steep wper angles c. sho11job~ with smulltaper angles d. shon jobs with steep taper angles Which of the following are the advantages of indirect addressing over direct addressing '!

61.

62.

63.

7 of IJ I. 01e progrom length is shorter. 1. n.. progmm takes lesser time to

l'XCC!Ute.

J . 11 allows the tlexlbility of using pointers.

4. II allows mor~ etlicie.nr us~ of the eachc.

~elect the. c~n·crt answer usmg the codes given belmv : a. Only I , 2 and 3 b. Only I and J c. Only 2. 3 and 4 d. Only I and 2 Match the terms under the List·! with their description nuder the Lis1-ll in respect of computer organization and seloct th" con·~cl anh-·wcr using the CIDCI~.!-_give-n below the Lists : List-1 A. Disoribvted system R. MIMP C SIMD 0. Pipclincd machine List· II 1. Multiple contro1 units 2. Diflercm s kps of in,trucliull ar"

e.xecuted in separate sl·nges with lurches

J. Independent processors which are nerworked together

4. Lock-step synchroni7.ntion bc.twccn

•• b. c. !1.

multiple ltmcrional uniL~ A B C 3 I 4 4 l 3 J 2 4 4 I 3

D 2

I 2

Consider the following statements: The objective of value analysis is : I. to reduce the cost 2. to 1norease the profit

J . to hnpro1•e quality Which of Lhe statements given above are oorrcct '! n. Only I and 2

b. Only I and 3 c. Only 2 and 3 d. I. 2 and 3 Consider the following starements In respect of nexiblc couplings :

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Tile 0Bngc. of Oc:tiblc coupling arc usually made of grey cast iron FG200.

2 In the analysi$ of tlexibl<~ ~upling. it is U<SUOlcd that the. power i~

II'Im~mitloo by tho •hear resi~tcncc of the pin.<.

3. Rubhcr hushes widt hra<K limns :or~ llrovidcd tn ab$<1rb mi~Hil.ntnenl b Cl\\ cen tho 111 o ~ltllfls. -

\Vh.ic.b of tho st.Jtcmonts given ;lbOV\} arc correct .,

a-. 1. 2 nnd 3 b. Only 1 ond 2 c. Only 2 ond 3 d . 0 11ly I ood ~

64. In lll!Sc of bell drives. the clroc'i of U•e oeutri fugal t01tl!ion i~ lo: n. cause lhe bolt to leave the pulley and

incrense the power to be trart<mitted b. cau.<o the bolts to slay on tht Jlnlley

and increase the p(JWur to be lrant miltcd

\!. I'CIIucc I he driving p (lWCf uf the> belt d. siNtch Ute bell in longitudinal dircotion

65. Which one of the following statements i• not correct'! n. Hooke's joint is used to connect two

rolati.ug oo-plau:1r. non-Uth!I'SCCLiug. shafls

b. Hooke ~s joint i5 used to aonnect two minting oo-rlaoar. intersecting shafls

c. Oldham \ coupling is tt~ed to connect two pno·•Utl rotating shal\s

d. Hooke's joint is u,;ed i n the stl!l.>rina mechanism for automobiles

66. Stresses in ~ screw thread are eMi lllJlted by considering the thread to be : ~- long c.1milcv•-r be;om p.vjecting lrom

I he 1•itd1 ~ylintler

b. long c.antil,cvcr beam projcctiug from the root cylinder

c, shon cantilever be.1m projechng 1i'om I he rnol cylinder

d. short cantilever be•nt l"'ojectin!' from tho pitch cylinder

67. J\lntch List-! (Parts to be Joiucd) wiOt Li..t­U ('fypa of Joint) and select the com•ol nnswer U$ing lhe code goven beiow · J ist-1 ;\ , T\\o rod.• having relM)vcnxinl u•olion 8. Strap e11d orOn;conndCting rod

C. Piston rod and cross beod D. Links ort'our-bar chain List-11 l. Pin Join! 2 KnucldeJo1nl 3. G~' and C'ottor Jnint 4. Couc:r Joint

i\ B C D

"' t 3 ~ 2 b. 2 4 3 I

" · 1 4 3 2 d. 2 3 4

Sol tJ

61!. In • glb nnd colttn· joint, the gib and colter are subji«:ll:d to a. s ingle shear only b. duublc sltcar •ml) c. sing!~ shcar and CI'UShing d. double slt<:lu 011d orU!Wng

69. What i• the number of nodes 111 a shon c:::rny ing three rofors'?

-a, ZerQ h 2 c. 3 d. 4

70, !\•latch Liat-1 (Prope.r1 y) with Li.;t-11 (System) and select lbc oo1recL au~" "" using ·U•e code gi"en below tlte Li>l.< · Li$t-1 A1 Resonance B. On-<J ff control c. Natural frequency D. Feedback signal L lst-U L Clo~ed-IOIJP control S)Stem 2. Fr« vil)rations 3. ll'ccssivcly L'lrge4D1p litudc-4. Mcdun ic•J broke

1\ .B c D

•• 1 2 4' 3 b :; 4 2 c, 4 2 3 (I 3 2 .j I

71. In case of p.1rtinl balancing of single­cylind"' reciprocoliug ouginc, wlwt is tho primary distw·bing force along the lin" of stroke'/ a. cnuU>: ccm A

' , b. ( l - c· ) mrr~· co• () C, ( I - C) mrm' CCI5 0 d. ( l - c) mo>lr co.• 20

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om72

73.

74.

where. e : Fraction of reciproeatmg ln3U

to he h• l•nced; 6> = Angvlnr veloe,ity t>f crank~han; fl = Crnnk •ngle. C"rm~ider the following statementS : I. The condition of .,lability I> f a IJ.nvcmor

Jtquu•cs that lhe slope of U>e controlling to rce curve should he les .. than lha1 of the line representing U11: CC11tripd41 force at U1<: "'luilibtium speod under considctation.

l . For • c<:ntrifugal sovcmor whon th" load on the prime mover drop• $uddeoly. U1e •k~"\>C slwuld nt I)OCC reaclt lho 10\\ cf·mv~llmsitiOIL

Wbiclt of Ute slntcmc:u'" giv¢u uhovc is.n1'<> correct '! 11. Only I

b Only 2 c. Both I and 2 rl Neither I nor l What is fbe numb.or of ins tantaneous ccnln:s ofroiJltion for • 6·ll.ul.. mo~>hanism? • • 4 b. ()

c.. 12 d. IS In which one of the following i• • flywheel genernlly employed? a. Lathe b. E lectric IUOIOI'

c. Punching machine d. Gc:u:I.>Q.~

75 Wh:~t i.< U1c value of p>'<=m>rc tingle genernll)' u.;ecllt>r involute ge~r.< 'I

76.

77

a, 35° b. 3()• c. 15" d. 20" Cons ider the followu>g st~tements : I. A stub tooth hos a working Jcpth

forger U1on U>nt of a full-doptlt tooth. 2. TI1e IIlith l>f contnct l{>r involute genr<

is :an arc of a circle~ Which nfthc statement• give.> >hove is 'arc cmr~t '!

'" Only I b. Onl) 2

c:. Botl1 1 and 2 d. Neither 1 nor 2 Cons idcr the following slntemenls ;

7~.

79.

so.

? " ' 13 Cam follo\VCfl! are generally clas.•ified according lo I. tho no tore of it• mo!ion 2. U1e nature of its surf~ce In contact with

the cam

3. the spotld oflhc> cnm Which of the statements given above arc correct 11 -a, I ~ 2 nnd 3 b. Only I aml 2

' " Only 2 and 3 <l r)nly I nml3 C~m•i<ICt' the lhllv\\ itlg slolCmont;:: Ra(lius of friction cu-el" for o j ournal bcoring depends upon 1. cocfli dent of friction 2. rndius ofthcjoumnl 3. ongular speed of mtntion of the •han Which of the statemenl~ given aho\-c nre CCJrttCt?

a. l, 2 and 3 b. Only I and 2 c. Only 2 und 3 d . Ooly 1 and 3 'Vhat i:s the mn'!Cimurn acceleration of o cam fo llower undergoing sunple hannon ic. motion?

D. !!.r ~r 2 , "'

l>. 4h( ;: )

c. 4h( (!>: 1 fJ I

d. 2111rru'

.pl

Wl>cre, 11 " Stroke of lite follower : co = Angu l:tr velocity <1f U1e cum; 9 - Cam m1.3tion angl<: for ~.e m~ximum loll<>wcr displacemc11l C'on.•ider lhe folio" ing sutement.> : L. Lower p• iN ore rnOI'C resist•nt thaJt thtt

highcr pDirs in ~ plane mcch.wism. 1. In a ol-bnr meclloni;m (witl1 4 nrming

p3irs). when lhe link oppos ite to the shortest lutk is li:.:ed. " double ruck<" tn'-'clu\ni~un results.

Which oftl1c slotomenL• s iven nbm.., is/are conwt 1

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84.

..._ Only I b. Only 2 c. Both I ond 2 d. Neither I nor 2 In Zinc BJende structure. eaeh atom ls surrounded by four •toms of tl1<~ oppositu kind wh.ich nrc located at tltc comers of whic.h one of the Jbllowing't • · 'I etrahedron h. Ho:ocahcdmn c. ('IJI>c

d. Orthorhombic Mnteh List·J (Fv-Fc;C Phase D iBI!r>m Chnlllct.<.-ri•tic) willt Liiot·ll (PIIll•c) 110 0

select the COTT(.ll.!t ooswer u.•in!t lhe c11~c given below tho l.isl~ · r .ist-1 A Alplta (a) iron B. Iron .:.1rbide having crystol lntti~e with

3 iron ami l carbon -atom C. BCC pun: nllottope of iron is stable

between 13N8 •c and ;, melting point at I S3S0 C'

Ltst - 11

I ll lron 2. Eute.:.tie 3. Fen· ito 4. romcntitt

A B c a, 4 2 3 b. 3 •1 1

c. 4 2 1 d ' , 2 Which one of tlte (olf<m~ng pain< ,. not etHToclly runtcbcd'/ Sp•cc tAU icc Rd nLioo bet I• oen i\t1.1111 ic

R.•diu$ r tutd Edge cler.mmt • ll. Simple cubic $lru.cture : :•1 ~ .Jr2

b. Bod i'·Wn lr<>d cubic slructuro i -: J a· 16£"

c.; 'fridinic : 2at = 3r! d. F oce-centred cubic •tructure : •' = 8.-% What is IJ,e p hmar den~ ity of 1 10()) plane io FCC (face-cel\trod cuhic) crysl~l with unit cell gidc " ~<twtl 10 ?

1.484 :h

o'

b. 2 II'

IOnt IJ

c. ' ...

d. J2 7

85. MalQb Lisl-l (Element) willt Li.st·fr (Ctyslll l S!J'Uciur.;) ond scl,'<>t lhe con'ect anJ'over using the code given b-elow the Lists :

86.

87.

88.

Lisl·l

A. Alpha 1""' B. Copper c. ZiliC D. Gloss List · 11 I. Hoxngonat ciO>cd packod 2 Body-centre<! cubic

3. Amorphou• 4, Face-centred cubic

A );l c a. 2 3 l b. l 4 2 c. l 4 l d. 1 3 2

L)

4

3 3 4

Which one of 01~ following factors is more. Nlc"·nnt lo represent complete solub ility of two metals in each other'/ a. Chemical oflinity h. Vah:n~y lilc.tor c. Crystal $Lructun: f3etur d. Rclacivc size l'acHn Mntclt Li"t·l (Efli:d ofCon lirtg) with List· n (Cooling !vi odium) and select the CO(t"UCt

"'""'f>' using the ct,.le &iven below· List·l A. Mnrten•ile B. Very fm<> pearlite C. Fine pearlite D. Coorsc pcadjtc List - n L \Voter ~oenchcd 2. A.ir cw lc<l 3 , l'urnoc" cooloo •1. Oil quenched

i\ B C 0 a. 4 2 ~

b. 2 3 4 ~ 2 3 ~ I d. 2 3 4 30 r ~ st.;el has its yield ~lrengtlt of 400 N/nuu~ >nd modulus uf .,(as li<:ity of 2

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om89.

90.

91.

92.

93.

94.

95.

IOl MPa. Assuming the mnterlol to obey Hooke's law up tu yielding. wlult i$ its prool' resilience 1

~ a. O.SN.rnm b. 0.4 N/mm1

c. 0.6 Ni rum1

d . 0.7Nmmr1

Which ono of tlrt- lullowing is the proc"'' to filtine the grnin< of metal after rt has be<:tr distorted by hammering or cold working1 " . Ailllc3liug II Soft•'11ing c. Re-crystallizing

1l Normnlizing l'enrpenns is a pmces• of none:. ling a. manensite al low temperatures b .nart<:nsite 3t hiMher temperahrre!< t~ bainjte. at luw temperoHun:s cL hainlte at highc,. tcmpcratU(cS What is tho d'ficitncv ul' • sdf·h~tking power screw ? a. 70~•

h (iO'lo

c. 55~o

d. < 50"~

In case of power screws. what is the oombinaliou of runtcaials used for the

'"'''"' arul llrc nul 'l a. Cost iron screw and 111ild steel nul h. Crrrh<1n sled ""'"~" and phosphor

br~n?A: nul c.. C$1 irt)n st.."Tt.'\\1 :1oll cast iron nul d. Aluminium scr~w and alloy steel nut In pow"r tJ'ilnsmission sbnfls. if Ute polar moment of inartia of a shaft i• doubled. then what is U1e torque required to produce Uresame angl~ of twist 'I a. 114 of U•e original valu~ b. 1.12 of Ute original value .!. Samt as th~: orig_ ina( valu.: <l Double lbc otiginJII v:rlut WIIJit is sunk key mnde in the fonn of a segment of o cin:ular disc of unitonn thick:ne$<. known as 0

a. I' t:.lthor key h. 1\.Lnncdy l..ey c.. Won<lrull'kcy d. Saddle key A utolh:tlage is • mlllhod ole

96.

'>K.

99.

ll ofl3 a. improving the trnnsmi•sion of rower

from engine to the a.xle in automobiles b. improving th<>Sircngth Qfwcldcdjoinl$ c. pre-;;tressing ~re cylinders before

pulting than in sorvico d. improving the stn:nglh of riwtod joints Makb List-1 (Type of Goan) with List.n (Characteristics) and •elect the con'llct ans,~er using Ure code given helow the Lilts . Lisl·l A. He~cal gearing H. Herringbone gearing C. Wonn ge;rring

D. H)11oid se.,ring l. ist·ll I. i'.ern axi•lthrust 2. Non· inter-ch•ngeable J . Skew sh;rl\s 4. Parallel shafts

A 13 C

''­b. c. d.

4 3 2

2

3 .. 3 4

D 2

1 '2

In hca\')'•dnty geor dri''""· proper heat lre;rtrnent of gears i.• necessary. in order to; a. n\ OHI inltrtCrcn~.e

b. prn1 cot noisy <~pcllit ion

c. mnumizu \Vcnr of gear h::db d. pn)vitle l'c~islanc.e agn in~t imp"~-1

load ing on goar tcoth Which of lhe following is/ore u•ed fOf' cutting internal gear'S'I l. Gear hohber 2. Gear shaper 3. Rack cutter 4. Jig burcr Seloct !he com:ct an~-.~~T using the codC!l siven hc:lnw : a. Only I and 2 b. Only 2 and 3 c. Only I and ·I d. Only 2 ]\latch List· I (Type of Anti-friction Bearing( wiUr List·ll (Specific Usc) aud s~Jlt:c.l the correct nnswer using tbc code gil·eo below the Lists : t,ist-1 i\ > s~u:•ligning h•ll ht:"Jring

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D. Toper roller bearing c. Deep groove bnll beming 1) . Tltmst hall bearing L.1sHI J For pure axiJIIoad 2. For hinged c<mdition 3, For pure rodiJlllond -l-. F<u- oxi•l and r-•<liaJ Iva(!

A 13 c D a. 2 1 3 4 b. J ,, 2 1 c. 2 4 3 I d. - 2 4

1(1(). S•tisfactury hydrodyn.11ni~ film m 11

journ~ll>e~oriJ,g ;, fonnt:d when "· joumal s peed i3 loll . unit prtllmre Qll

U1c: heoring is bi@.b •nd vi>cosity of lubnCDnl used i$ low

b. journal speed il Loll. unit pr~sure on lhe b~m'ing is low and vlsco.ity of lulmcantu<cd is lu\V

c. juun,:tl speed i!i hi_gh. unit ptcS~u11C un lhe bearing is high nnd vi.qcosity of lubricanlused is high

d appropriate combination ul' joum1ol SliCed. urul pi'CSSUT<- Oil hearing and lubnCDnt vi~'Co~ity exists resulting tn low coefti.nenl of tri~tion

I 0 I. A body is ~objected to a pure tensile stress of 100 units. What is the mnximwn shear produced In tltc body at some obliqu" plano duo to tho obove "/ • · It)() nnit• h. 75lmils c. 51) units d . (l unit

102. Wrulc transntiuing the same ro•\~r by a shlll'l if its spucd i• doublctl •~h>t should ht- it~ O\!\V dinme1er if the maximum she3r­~trel<s induced iii the •hal\ remnio.s sam" 1

o. 1. uf!he originol diameter 2

h. * of the original diameter

c. ..fi of the origi.MJ d\ometcr

d. ( 2~b' of the original dirunctcr

103. lu a tensile lesL uc:u- tl1e ci:~Stic limit zone :._._ tensile lCires!'i iucrc:t~cs at a fo.ster t'ate

11 ofl3 b. tensile str~11s decrea&eJ ut a faster r.ole c. tensile stress incre:a~e. m linear

proporti<m to the stre•s d. tenslle streM decrease. h1 linear

proportion to Ute sm:ss 104 . ln ;a strnincd m:.tcriol nom1al strusscs on

two mutWJIIy pcrp<mdi~ulur piau<'> are o. and c;l thotb alike) >coornpnniC~I by • shear .<~re•s ••r· One of the principal stressc~ 11 ill be lc:fO, tmly if

a. r "· ... 2

b. r = <r a

c. r9

= JCT. (I

d. r,. = ~c:r ' <T,,=

105. Two lapet•ing b•rs of tlot>snme uwL<:1·ial an: subjccloo lo a tcusile load P. The koglhs of botl1 lhe bar< ore lh~< same. !'he larger diameter of eac.h of the bars i~ D. 111e diam~tc"l" of tllo b11r A at Its •mallc.r ~nd is D/2 and tltol of the bnr fl is D/3. \\~tot is the ratio of elongation of the bar A to that of lbe bar B'1 a. 3 ~ 2

b. 2 ~ 3'

c. 4 : 9 d. l : 3

106. Tite poUt..'Tn l.nowu a~ Widouanst5Lten s.tn1cture is CTICOI,lntered in a, tempering h. OUfll\Aiizing c. sploeroidizing d. onnealing

1()7. Pbenollomta ldehyde is a I au a. tbttmtOpln• tic polymco b. Utcmoul"l l'ulynle.c c. cbstmuc:r d. rubber

l ll8. An ortholl:opic materiol under plone stress condihon "ill have: a. IS inMpendenl elastic cons"'"'" h. .I mclependent eiMlic constantll c:. S indepd:udeut elastic t.-onst:!tnt:s d. 9 independent cia. lie onnstont~

109. Match List·! (Con:IJ>Mitiuu ) with Li~t·ll

(Applj~•tion) and Kelcct the cocrect:ouswer using lhe ~ode given he low the l,i'l~ · List· I A, \ ummerd:ol bt'On7e( 1(\li<o/.n)

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0. Red brttSs I I S"o Zn) C. Aluminium bms (22~ .. Zn. 2<'o AI) 1) . P-bronze ( 11°olin. smoll omoun1 ofP) L.tsl·ll J Radfator 2. Sprint; rneml 3, Forgins and stlunping ~-- Power plant and chemic> I t:{Juipntcnt

A B C D n. 2 ~ I 3 b. -~ I 4 2 c. 1 I 4 3 cl. 3 ·I 2

110, Whi~b one of 1he litllmving i• 11 oc)nlinum» b~nding pr<o<-e.«s in which opposing rol l~ >rc wed U> produce long sdction• of fonned olwp"» li'om co.il or $lrip 51.ock1 n. Sll'elch fonning b. R"ll forming c. Roll bend ing d . Spinning

I I I. Which of the followi11g ;tre lhe limilotions of po\1 d« m~ta llurgy? I. Hlgb tooling ond equipment costs. '}.. \V os14ge of m•teri•L 3. 1t Cllnnot be >Uiomal.c<l 4·. E.xponsiw molllllic powden.. Select Lhc correct auswcr u.!Ung tbe code!i given below : a, Only 1 and 2 b. Only ~ and ~ c.. Only I and -1 d. Onl)• t. 2 nnd -1

11'2. In which or the thllowmg are molnl moulds us~'<l 7 a. GN<n•and mould h. Dry <~nd mottld c. Die cas1ing p•·ocess d. Loom moulding

113, Which of the followihg ma1erial< are used for miliu~ patterns in inwsunent .:asling ffil<thod?

l. Wax

2. Rubber 3. \Vood 4. Plastic S<:lec1 the run-ect an~wer using the ~ode~ given below : a. Only 1 ~nd 3 b. Only 2 and 3 c. Onl)' L 2 and 'I

d. Only 2. :, and 4 114. Shell moulding con ~e u~ed for :

a, producing milling cullers b. making gold orn~me~•~~

l3u1 13

c. producing heavy and lltick walled cru>ting

d. producing lhll\ costing 115. J\cc<>rding lo Clworino1 ·~ equntion. the

solidlficmion time of n cnsling is propmtionnl to a. u:

1>. v c. l/11 d. 1/u1

wbero:..., = volume of casting lito In which of lbe following welding

processes. nux Is used in the fOI'Ill of g_J';tnulbS ·~ • . :\C Me welding b. Submerged ~re wcldin_g c. Argon 11rc welding d. DC: ar.: welding

117. Which one of lite f'OlloiVing is nnt • fusion welding process jl tt G3s \V<IIding b. Arc "cldlng c. Brazing ci Resist•nce welding

118. Fabri.,alion 1\'ulclabllity lc~l is used to delermine u. mechMica l properties required for

Rntis litctot1' p~'1'1orm•nec of wdde<l joint

b. Huoceptihility nf welded joint fot cracldng

c. suit~billty fnr joint de•ign d. oppropriale mochin ing pmcess

119. Which one of lite fnllowit'lj! welding pwces~Ws consists of ntinimum heal affcclod zooe (HAZ)?

a. Shielded 1\lctal Arc Welding (SMA \V)

b. Laser Be:nn Welding ll..BW) c, lllirasonic Welding (US\V)

d. Me~• l inen ~n~ Welding (MlC}) 12(1. What dues hydrustalic prdSsttre Ln

«:xll·us ion pmcess improve'! a. DuctiUty b. Comp1-essivc s.trcu_glb c.. Brittlom:ss d. Temile >lrength