Mechanical Engineering Objective Questions Part 14

7/30/2019 Mechanical Engineering Objective Questions Part 14

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MECHANICAL ENGINEERING Ifn u vibrauoh i!iQiubon system, if ol/ro,,> I.then Whfit ~ Ou.- phoso ili!Jctencc bet\\


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l'wo beoJWI of d e n t i C : ~ ~ c r o ~ . s e c t i o n butof differc'nt materinJs ~ : m y $ame b.:ndingmumcnt at a p>rl icular se.;li(m, lhL"11L the maximum bomling s!f\:s> ul thatsection in the two bc:llnl! wilJ be me..2 Ute moxi.tuun1 3b

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2111 15d. l 2Whot is causa of rniluru of a shorl MSstnu und..-an locl?a, Fracture t r e s sb. Shear ~ r ~ ~ 'c. Bucklingd. YieldingA mild SlclCI "J>CCtmen lesled m e r u ~ i o nup 10 frac tu1e in n lltliversal Tc:., tingMnehiuc. \ \ ~ l i of the fnUowingmechmical p n ) p ~ i e s 11f rhe mnh:rial CMbe o:va luatetl f[lnn u e ) ! ~ lest?L IV!odulus of elJinicily2. Yield stress3. l ) u ~ t i l i t y.J.. I ' 1 : 1 B i l ~ g5. Hanlm:ss(i. lV(I)dull!-< ofrigidil)Sel.:cl llte eom:ct answet using tho! codeg_ivc.;n_bc_owa. l. 3. Sand 6b. 2. 3. -1 a:nd 6c. 1.2. 5and Gd. 1. 2 3 and 4Which one of the following t:JII:Illl!nls isCQrfe(lt?a. Increasing the addmdum "' "uhs in alargervalu-e of contact rnhoi). l)ecrc:ainJ! the add""dn111 resuiL tn largl:rvalueorCQ013ol. r.Uioc. Addcrulwn. uo .:ffi!Ct on l : t c l

ratiod. l\ olh addendum basu cLrclcdiameter ~ v e e_lfecl Qn CQnl:loi ~ t i < Jlfnw c-an inttrferenc.: mnvo lute;s g . : ~ ! ' $ beavoided?n. Varying lloe ceniJ-e dist nce hyeb:Uiging the p r u ~ ~ t ~ u r c angle onlyb. Using modifiod invuloles or < ~ m p o > i l c

system onlyc. lncteasing the nddemlutlt Qf sm11llw1 tc:el nncj reducing il ro r the largerWhtlt:J unl)

d. An) ol'lhc abo\'"For one degree of li'et:dom plan .me


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c. Titrec t e m ~ links a.nd three b 1 n ~linksd. One ternary link and live binary links~ L.tsll Wllh List-11 nnd selocl thecorrect answer lllitng the code l v e n b.:lowtbcLi.sts:(Additive lor Polymer)A. Plastiiz,CI'B. FillerC. luitiotutListlf (f 'UI]>OSO)1 Allows polymeri7Jtlion to begin2. Culcyun; the matoriol3 , Acts o!l inLQonal lubric:ulls4. lmproves HtrcngtltCodes:

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For .a mnnua l opl'fllliList n (ApprQpriotc Method.tudyTechnitlue)I. Flow d i ~ g r n m2. Flv1 A c A I:J 2 4 3 Ih, I 2c. I 4 3 2d. 2 '' 4ln c o s ~ Qf muwaUy . _ ~ c . projects,wbicb one b Uta tllO!lSuitoble crfterion forcvo luAion of proje


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d Requmtlon ofrools and filcJhtlesWhich of ihc fol lowins are 1hc o b j e ~ t r v e sof sched uling?I Reducm g a'erage waiting ume of' ubotch1 To m ~ e t the d . : n o l m ~ or order

fulUllml!lllJ To m1provc: quullt) ofproductl.4. To m c r c a s ~ fndlny u t i l ~ u o nSelect tltc co.'Tect illlS\\W us ing. clltleIDVI!ll bdown. 2 a n d ~b. 2. J and 4

l . 2nndJd.. I und 3 onlyWhy docs crmcr wear sutrt at somedtsmnce from the tool up?

26.

a Te>ol 5trength i;; mm1mum al thatregionIJ Cumng Oud cannot penetmtc thot

~ t ! g i o . J lc Tool tempcmturll is muxunum ll\ thatrc,gioud. Srr.:ss oo m ~ c : face I!" mu.\.imum nllhBLregion

~ s.s 1 3~ . . -0"""""l""""'-A diugntm roltlted to much iniog economtC5Wtth vanO\IS Cr;ts1 C0111J1Qill!llis IS t;lvellahove Match - I (Cost blerneml wuhl. tst - II A p p r o p n u t ~ Curw) w1d I ! C k ' C t t h ~COITI.'Cl DllS\Wf USITijl th code gtVCII hcJI;li\the LtstsI I (C'Ust F , l e m ~ mA Mnchmmg costB. 1'ooi cos tC 'Iool ~ c o s tI) Non - PfOductwe costLtst ll (AppropnucCunelI Cllf\'e- I2 Cnrve-:!J . Curve- 3J Cur\'C 45 Curve- 5

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Codes:A

a, 3b -1c. 3d

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Mntch Ust-1 ,,,th Li:n-11 nod seleer thecorrect ansv.

L i ~ t (Machtnc rooi/Cuiung Tool)A Screw cutting lutlteB. DrillC l:.nd !lUll0 UnndmgwheelUstll (Char.tctaistlcs)I Self ockmg UliJ'll'2. Chasmg dml.3 Wtper inse114- Sell N l e a . ~ n t g , LHp.ll'S Ba lance we1ghlSCodes.a. 14 B:\ c3 0h 2 51:. .j 3 5d 2 5In l l e ~ l i z e d chtp li:>rmreuk oiT remo\'e s..,me or 1hecuttmg tool mnteriuls. tl!Lrob) reducing,too l hie Wh1oh of the to llowmg stepsPfCI'CRt Dulft Lip l'dge?I c r ~ 1 S I I l g cmtm,g, speed2 lncreasmg feed mte3 Increasing nmbtcnt worl. - piceetempetature4 Occn:asmg mko angle5 Rellueing fncuon

dec.l t l 1 ~ ~ o n - e c t M s \ l ~ r usmg Ute Codegivenbelown. t. 2 and 3b 2,3und4c. I, Juml5d 2.4 and SWllich of the loiiOWlhg chnroctt:rtShCSappei'Uiin to horizontal and verl'icnl C'NCmach tntng cenwrs?I For horlzoowl CNC machmmg cenrre(M('), C \ l l l i n ~ ? . mouon Is giVen to

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tool w h e r c t ~ for vertical CNC - MC'.cutting m Jess Lllt 20 tool'l wber.:a&vertical CNC - MC U\Ofl> tlum 40loot. m their too l hold""'3. l'or horiT.onul CNC MC. " ollmg

mnl.ion i given to job whereas forvertical CNC - MC culling motion i&gi'l'-.11 to IOULSelect correct. an$wer usin,!l OH: oodcgiven hel011a. I nnd 2nn lyh. 2 and 3 on

I :111d 3 onlycL 1.2and 3

3(1. Wtrich ana of t)le following )$ thecboraeterlsti.c fc1r " J l " I ltlflc1;1. Role ul'pTduetion i> lowb. Labourcost ~c. Used for ltnndling j obs> ol" vnr)'ingsh1>es IIlli! ~d. Cnps ll!n ncad i mounted un asl.irw

31 . For punching operation. t.bo clcar2nco ill-rrovidcd on which one of the followmg?a. '!be punchb. The dieo.. 5tl"oon the pun ch ond 50"> on thediecl Jl3rd iln punch and 213rd Qn the die

' 2 . . M a t ~ h Lisl-1 wil11 Lis(-IT 11n1l ~ c l e ~ lh.:CllTTOCt >nswe r - ~ ' 1 1 8 Ih wclc jjivon ~ c l n "1111> i ~ l ~List! ( l'ypc ofRolling Mill)A. Two high nonrWolllin@ m i l l ~B. 'DU't!th.iglt 111 illsC. Four hi!!b nUIJjD, C l ~ ~ > i l < : t n t i l l ~Li;tU C h a r n u t c r i $ l i ~ )I. Middle ro ll rotates by friction2. B} small working roll, pOl\ot furtV llin !l rt


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t. In injection die mouldin,am()unt Qf material tO fill the cylinderis tkliw rcdb. Lnjoclion .Jie moulding ill ll"'' "r.illylimiloo lo fanning lh

I d ~ onlyb. 2 onlyc. I and 2 (mlytL I 2 and,3What IS a eharl that shows the step - bysier1han c r i t i ~ a l rod ius nfinwlationb. Slightly lower ~ 1 o n c:ritic:tl r.rdius of

in.ulat ionc. !!qual to the ouitl.::.1.l rnd1us ofu l ~ t

d. Cuusidctnbly hi !!lrcr lhnn critiolllrodlw; of < n l a ~ i r mA building in a c(lld dimate rs t


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i the minimum power required lor ltc.11pump'lI@I, Pulsc:-jc:t "'l&Jno Qpcrtion : < ~ n l>t: itlcollzedapproximatod In foUow wh.ieiJ one or the:followiug1tt. Broyt11n eyeleb. Ericsson C)'d ec. Lenoir o)>eled. Stirling t:.ydoCousidcrtbe following sllllemcrul!When a GSFIE line is nb. l!lcrcaslllg lhe e. l f fi' is o c l l y vwtor of fluid, thcnV. -U i Melly ln&t: f"'c. l/4 Hd. 118 II(H = l ' o t o l ~ o p p l y h . , . d )

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A pipeline snitl w be equiv3le111 w;molher. If n botha. J.ength and discharge ate Ute sameb. \' e locitynnd dischorge re Ihe samec. P1scha rgc: fncto


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55 i\I1 i!eni.I1lplc nozzle Is dilY drop to Ut.:

. 1 5 ~ - n f l ' o p enllta lpy drQp botwt!ell Ute5tame f \ . " ' S ~ u r e s

2. Vcll more titan 200.Which of lite sllllcmculs given ubovll is!orocorrool?;o I anly1>. 1 JJid 2 "" 1yc. 3onlycL 12nnd 3

38. A hollow sphere has mner and outersurra... 1ll'eas or 2 ..,, and g onr!)' layldistance x as

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How is lhe diplac.:ment thickness mboundary layer analysis deli ned'l" The Iayer in which the Ins' of energy is

rmnim umb. The t i c l . o t c . ~ ~ up to IVhlclt lbe velo"ilyr u u d o c ~ 994 of lhc fice h'Cuon

' 'dncil)c The dis tance measured v111ndk ub rto the boundary by whi\:h frclests=nt ; , displncctl n ncct>unt ofonnotinn u n d o r Ioyer

d. The layer which reprcsi II)

d. " ' b'lub

Aborbonl In .1 \lol'our buqJtionrofrigernlion S)'lllcm sopnrntes from thero;fnger;mt f]n ly IJen Ita, Js suflicienlly heatedh. Is Mprnye


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2. TI>e work of Cin the r:>nge uf 3 lo 6 oxcept nJVer'J' low ternpe1111:ure when it may bless tltnn LWltich o f ~ " ' Stnll:menl!l g""" obuve nrc

CO ITCCI"!' 2 ~ n t l 3b. 1 ond 2only"' I and 3d. 2 and;).only

65 , Ideal re.r igront mil


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74.

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Adlabmic dropI.h !!tJi StiP rlictJ

2. fotn lwork done on the rotorrmnl adiabatleheat dropCI 1111HIHtlve hent dropofall S l ~ g e sJ. Total sdiobatlc beat dropEnrhulpydrop in moving blach:s4. bnthalp} dl'(lp intlle

C oA 13 C 0a 3 1 4

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In thOSystem given ahov_,. UlC" LCI'nperalUR!T = JOO K. When is the thermo dynamicenicicncy 11 111' engine E equal to therccipruc;tl of the COP ollt.'a. When Rnl!t; a;; n hcut pumpb. When R nets as a refrigermorc. When Ract bo th as n heat pump md orcfrigenuord. Wben R acts as neither a heat pump

uoc a .refrlgcnllorConstant pressure lines in the super-heated

of the Mollie dillgram nave whattype ofslope?a. t\ positive 5Iopeb. A negative slopec. Zero sloprI f c:rntnl\Jgal governor nperutes I I D t " ~ " ' "speed 1un atJ< w1 nnd '" ' r h ~ n whm tsSCRSIUVIIV equnl10?a. ~ ~ -b. ~..:. "' ; -~ + t qd. f'*-' w,

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c. Doth 1 Pnd 2d. Nci lhor 1nor 2For ep icycliforee l>y 1 oc. Spring f9rce aqd domping force < ~ r e u111h.1se. 01nd inertia (()fee e ~ d s them by!Xl"d. Sprinjl l l ' l : ~ and inertiJo ful'l:e . , inphose. and donoping force leods lltoruh)' 9()

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b. 2 onlyc Bolh I nod 2d. Neither 1 uor2

% . M01d1 Listl Wil li L!>lll lllld sdcclc o r r ~ c t nnswer ~ s i n g the-


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106.

s u b j e ~ t c d 10 li n end momemd, subjocted to od Iover its wholespn1\ round bar nf length /, l o ~ t l m u d u l u ~ 1:;and Poissons nnio is j e c t e d toaxial pull p ', \Vhot would lethe chonge involumt of br'l

"pi

(Jp/(1-Zp)

" plj/l lcl pi

II /)'A he.wy un ifonn rod of length L' nndm"terial density;; i.< hung i c : a woll)it lOJI end rigidly f i . ~ c : d How t< the lOI:llclongo tlo.o. ofl)1e bar under its nwn weiglltexpressed?

L ga. K; ; / } ~h.

lEAn nulotnobilo bnvlng a a of 2000 !.&crutses al a spacd of 20 m/s I f nil thowheel "" ' jammed moddenly. how for willtl1e aulomohtle skids befol'e it comes lu ahalt. llil5uuUng lhnl the vehicle do'" ' no lp.in or topple? The cocfticieoJ of fhwcr teJnpn vo lume

l u t n l s t e a m\) . OClual vo lume IS lo:s!t IJ1>n vo lume Of turaled stellmactual vo lume. i5 "'JUUI In vo lume of

$OTIIfHicd t e . 1 md None ofthe aboveIf M 1, !vi,. 1\1,. le mo lecuL1r we.gbl ofconstit:uen t QM


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cc. A U ~ {).1'ctL 6tr ( ofproduction. BoUt A.utdR lll'C indjviduaUy true andR i d1e com:cl nut the cllrTt:ei e.xplanntion qf Ac, A is true bulR Is falsed. A tS fal,oing pQrt of thenov le rs so short nd swam '"')ocity ls- sohigh Ural Ure molec.ules do 1101 hnvesufficient tum: lo rw llucl nnd fonn

droplets. J-encc normal oondcnation du"'inot takeplace.a. Both A and R ol'e md lvidunlly lroe nndR is U1e cnrn:cl o:.xp lonntiun ol'Ab. BoU1 A nd R arc individuaU\ truc hutR is not tl1e ' I ' I ' C cxplMaiion vf1\c. '' is true but R is falsed. A is f.rlse but R is Lrue

l l\J. ~ e r t i o (A) : For p < : r l ~ i gas.hyperbolic e ~ p : t i o n i.- ii;Oil>c:rmlt:.\l"'lll!lun.Re:tSon I.R): For a perfect gas. t'v/1 =~ I ! Slt BoUt A 1111d R ;uc truo andR is COm>Cl "-'< plnnntion ofAb. Bnllr A :md R arc imliviclually true but

~ ~ n o t the correct c:xplon>lilm of;\c. A true but R is r,,lsed A is f.1lse but R. s true

Il tl Alise(lion (A): Twc1engives t\ ;rod B W(JN

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Mechanical Engineering Objective Questions Part 14