Mechanical Engineering Objective Questions Part 11

7/28/2019 Mechanical Engineering Objective Questions Part 11

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I " ' I JMECHANICAL ENGINEERING l r

CQ.IlSidcr the cmnttlcvcr londcd n.s h o w nbelow

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Whnt is 1hc milO of 1hc mmdmumC O i n ~ S I V CSti"C!'O$- ,0 t. tlb ::oc 2.5d J ( l

10 Lhd maxunum lensle

A c; lo5ed c:oel hctecal sprmg ha.'\ I5 ro ll'i.. I flh ea rls o f this spnng. l"'mnved by1..*\IJ t ng. ti\C stlffncss of the Jnod&OOO. :$pnng'"'IIa h u ; ~ c . : col 5 timesb increase10 I S Limosc. reduce LO 0 ,66 um


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2]0 mm , lfthe pressure W111le of 01o \\Om\is 20, 1\hM is lhc a_(j al pitah M thCI 11onn 'la, 71\unb. 2lmmc. H mma, ro nun

It Ue figu re shown, tl te sun wheel h.as 48ttelh and the planet hns 24 lcoth , If he s1mwhee l IS Ci.xed. 111lllt ts Ute angular l'e[ocrlym1 1o bcl\\ccn lhc mlcmol whcolnnd ann '/:1; 3.0b, I :5e. 2,11cL MWhich one ol' the following is satislied iCthe llow is ircigational fo r a I II'Qdimensional fluid clement 111 the x 1plant'11,,v ftua - ~ -

i'Jr ~'"" 7;;b. - =-i!.Y Ovc - ~ ;;., ,.,,ru wd. fu- ilv

IOU kW power 1s s1lpp1Jed to the machinethrough a gear bo.x whzch uses ancpzcyc hcal t;ear tram. 'rhe power issupplied al I00 rad/s. TI1e speed 1>f dmOtllpul sbnfl ol' Ule gear bo" Is I0 radls in asonsc opposttc 10 lho u1put speed. Whul isthe holding 1orque oo 1he fuod gear of thetrnfu?q. 8 kNmb 9k)'!lllc. I0 kN 111d 11 kNmConsider the followmg slnlemmls 'lu dcsig11mg '' plant Qul., n ProductLayoua" shou ld be tJrcforred if

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l or 14I the variety of ile products is low.2 the variety of the products 1s ve.rylnrge.3. tl tequantity ofproduction is very smallin ctachYoriely4 Ue or produclion is I 01 ) l ru-gein each \nncty5 Lite Utprocc s..ct n ~ o t i o is max1mum .6. the ln.-process ln.spection is miuituvmWbiclt of iho atatemcn ts glveu abo \ c arecorrec1?a. I. 3 and IJb. I. 4 nnd 5c, 2. 3 and -1d I, 4 nod 6Trnnsm iss1bilit) is uu.ity nl two pomls.Wh ich om:< ot' the l,ollowing is true forfhcse two poinls?a. "' Ihi , IS ?.Cli'O and ../3 fot oil va lues or

dampingb. "'Im, wro ond ./2 for olI vulues ofdnmpingc, IJJ/ i l l , Is \llllly aud 2 Cor all volues of

dnmpingll mll, w t i t ~ uud ,fi for all vuluos of

dumpingAccording to St:tblcr's rule. m qb liquecu1ting !he chip no" Wglo IS eq ual to ncoostan t multiprted b) 1001'sn. angleof inclinauonb. zorutnl rake anglec. velocity rake angled. c!ftcUI'Onth zmg.lc

S I V L ~ S type scro\v machines halea. I111TeiSb. l'lldinl slidesc. spindle ca rrie rsd. tool postsMnlcb Lis! I (N ame ot' the Cns tjngProcess) List II (P rocess Defiollioo )ond select the c u r r ~ " < ; tll>s"er usi11g U>ecodes g1ve:o belowil.1sl lA. Die a s t u ~B. Elcc1r0slag castingC. Centrif11gal castingD. Precision oastingLisl llI Tltis process itl\'ohes use of a mouldmade of drled sillca saud and phenolicresin mi.xlute

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2. In l h i ~ pmce.s, molten meUtl i;, forcedby prc. will1 tnu,.,ruse in J""el olactivity .md it l n C ! ' e ~ with i n c . : r c ~ ein au- ve locityd. ET d""reases wiUt incNnSo; ill luvel oJ':tl!llvit\f Mtd c c i " ' C C l S ~ wi th e r e ~ J s c inair ~ d yi \ tr.lin of'1vcight 200 IO' N is runningon a bo rizo111DI track at a constant p ~ c d oflO 11vs. ovcr1W111iug, eonstaul Jlictionalforce of 20 I IJ N, \Vbat is tho power orlhe-engme r r v i n g the trnml3 . k\\'b. 1200\;:Wc. 100 kW

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' l 400 kW::14. !\latch List I {1'ypes of TesL andl\fnle1ials) wi01 LiMt U(Types


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he at 1 s t n n ~ e s x1= 30 em and = 90 emfrom the lead edgeM tht! pl(tc'a ' " " ~ J ob t dt2= 1/3c. t1lt l = (3 OJ11d. t ,lt l = t3 0)11Ttltal enlhalpy 11f s tream nl the '"'"' of anozzle is !300 I;J wh1le 5Ultlc enthalpy attho I!.XIl [) ::!555 kJ \\'hill is Sll'Wll>tiodt) at 11' c x p u n > ~ Ml!lenlropic'l:1, 71) m/sh :!45 mlsc. 450 msJ 700 mls

Dis cha r ge -Ihpe at ~ hlC1; kNb 0.5 RN ~ m m theory)(f, [


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For which one or tbe following columns,. .6ulerbucklmg load = -- ; ; -1Ia. Column With both hingedb. Column with one end fLxed and othe1end froec. Column wotb both ends fixedd. Column with one end fixed and otherh i n g ~ d~ 3 T' t Js\Vbat is the value 11r K for whocb therelative damping or the closed l0 e r using the corles gi11enbela"'-,\ List IA I / c ~

1'\._f-7B. EE1-c. Iac0 , Ia '.List J]1 A shaft compressed all-round by a hub2 Bending. moment applied a' the freeend ofa cantilever3 Shaftunder torsion4. Titin cylinder uoder i.otemal pressure5 Titin spherical shell under imcmalpressureCodes : A B c E>

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A horizontal beam under bending has amaximum bend io1g stress or 100 MPa anda maximum shear stress of 20 NtPa . WhatIs the max imum principal stress In thebeam?a. 20b. 50c, 50 1- .j!IJQI)d. 100Consider the fol lowing statemeniS l'oralmply supported beam subjected to acouple IU iL rnid-sp811?I. Bending moment is zero at Ute ends.

and maximum .at Uu! centre2. Bending, m m 1 1 is constant tJVer Ueentire length of the beam3 Shear force i5 constan t over che enri reIeogth of the beam4. Shear force uro over lite entirelength C>f the beam.Whlch of !he statements given libo\c are

C U I ~ e c ta. I, 3 _11d 4b. 2.3 and 4o. I and 3d. 2 and 457 Which. ona of che follb,Ying weldingprocesses cottsists of sma ller HeatAffected Zone (HAZ)?a Arc weldingb. E!leclro tt beam weldingq. MIG weldingd, Thmnit welding58 . In which of the fo llowing o p e r a t i o n ~micrp monpn study techniqlle is used?I Short cycle operations lasti!J8 twomlnuresor less2. Long cycle operations lasting more

Lhatt five miuutesJ . MediunJ cycle operalit)IIS lastingbetween two and live htinutesSelect the correct auslver usiug the codesgiven belowa. I un lyb. 1 and 2c. 1 wd 3d 1. 2 od 3

S'l The follo"1ng are the con$tiluem step5 fnprocessofpowder metallurgywww.examrace.co


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I . Powder C


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Tamoum of heat supplied per cycle 15 57J, what is the outputof the engine?n 66Wb. SfiW41;iWtl J6WA fC'/;!rSJble hon cyc.le aQsorbmg heat attemperature T ttnd reJecting nLtemperal\lre Tz. What IS COP of tht.>combmed syste.m?a [ 1: r ~rt 1,-1,b. [ n J ~c ( ' ;lf r, ),-r r,-1d. ( /., ]( 7i )r, - 1) . 7 - r,Match List 1 wtth L1st Tf and seleot theCOIJe


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pressur.. heat pddition prwel\ ill 67S 1..W.rurbine output olltllmed dllring c.q>ansionlR 425 k\\ '. \\'h(ll tho ra t of tl1W-Iinc lyoul rn mnnnrnctururg npernlio n aren.. 1;;! 3b. l od 2u. 2 and 3cL l pnd 378. Several CJ.Unci ng ru les be ~ e \ 1 toSe411ijfle in!', 'Fame)EDD (E.'\peetc:d D!ldDa.t")11nd th" following J>elfnnunl cull! i tti"'" 12 J\1( p , ~

~ b c t c1'.1 s number nfp>rtll mode per monthI ' procesing partWhloh tf' U1e f


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tl ; 2 4g:z. l"rofit vu lume chart technique andl'cctiw tool of ; ~ p p J i o a t i o n Ior onnlysiJIwtum lhc Contpony i dcilitlg witho, onu product onlyb. :o lul!ll ilu:otion

Oril)' hom-kc:)' > F ~ l ! n m 1 l l ~d. nao'" than one pro,lrn:J83. Stonplonnlion.or i\b. Both A ond R oro inclividuaUv truo bulR not Ihe CQrrecl e x p l ~ n a ofA.:. A is lnu: but R is. fabet l A is r ~ J s e bul R ;. (I'Ue')0, " ' ~ r : L 1 i o o (AI: Hoi wurku>g does nulproducestrnm hord en ing.ReMon (R): Hoi woo'klng is donel11o recoyst.Jllz11lloo Letnpet3 ture. DuU1 i\ nd R arc .iudividuoll)ltuo uudR i correct esplomnion ufAb. l3oth A :md R are lndividuall} trut butR is noll o!llrteetc.'(plllnolion 11f Ac. A is true but R.is f.1lsed. fulse but R is lruc

' l l, A / > ~ e r l i o (A); Rolling requin:s highfriction whi ch inereas"" liorddl ;md puwe,C()IlsormpLion.Reason (R): To prcYcnl dDmage lo Usurface of the ro lled pmducli, lubricanl$should be 11sed.a. Bulb A and R ;ne irodivtduaUy true 4ndR is lbo c o ~ ' < : L .:xpl!lllolion of'A

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b. Doth 1\ and R arc indtvidually lr\lO butR ll i O t l h ~ correct e.xp lnnaiion of Ac. A if; It ue but R. is falseo. A is fnlse but R i$ It92. A l t ~ ' - n i o (A) fndu't:ct oxti'U$itul U(l c t a t ~'' Both \ :>nd R ure individually tfQe :md

I{ Is ''"' cnrrect J I I n o H I ) ~ vf Ah. BoUt A and R 11re indtvidually lru bulR is no t the com:ocl""planolloo ofAc. A is !rue but R i. i'aled, A is l.1lscbut R is lnie94. A s ~ . : r t IA) . Cails of c o n c e u l r i ~.:yliudrieal beUCJJJ springs. u ~ d d tu ptuvidegro:tlcr f pl11uj!hing lCJL


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3. Low s p e c i t i ~ speed impli11. The pnlS5Utc drop ir t tllo flow direction

IJ 7.1f'Ob. 'l'he Yek>city profile change. unifonnlyin Ute flow direction1!. 11u: \ 'olocity pro[tlc does Mt cltuose intbe d i r e c ~ i o nd. The Reynolds pumb


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o:. Automatic expansion PlWd. Flool\alveWben does L.P. cul-ot r peow In an:frigcration systtm?u, 1f 01e .unbicni iClU J>et'c. 1 rc:frir,:eronl charge is owld. 1r lubrf"ating oil gotl oe FeownI. Caplllary tube: C11oklng2 Thcnnoomtic o:cpnns ion aheConst.ont tcm )let:Cture:> Automat iC p va lve " Constatnclcgrcc ()f e r h c al. Float vakc : Mil Oo" rote ofrofrigornnl Ling the codesgiven belowa, 1and ;!b. 1 antl 3

lond4d. 3 lllld 4117. II' mOtsI J cr t< sen. i1>1y i:Qnfcd aoovedtW pQml, wbiob Of fuc [t)lliJWilll_lslalcmen.l5 il.re corroot'/

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" " ' 14L ReL>Iive humidity decreases2. Wet bulb tempera lure decreases3. Wet buill temp erature i n e t e a ~ e s4. Humidit rntiit retnuins cOII$hln tScle.:t the e

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Mechanical Engineering Objective Questions Part 11