Mechanical Engineering Objective Questions Part 12

7/30/2019 Mechanical Engineering Objective Questions Part 12

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lC.S. f:-Pre :!005 I of l4I MECHANICAL ENGINEERING--- J2.

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A banery is used 10 ligl11 a bulb. run a.fanQnd heal au electric iron m case p


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4. Equipment! o i l a b l e n:nd theirChGl'llctistiC$Seleet the correct a n _ ~ w e t USing lhe codes

giwu ~ l o 1 1:t . 1,2..3nd4t.. 2 noolbl ana 11111.R,. 375, l ~ b o u r cost R'i'. '24.5 uml U1ctlire


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A system ., r IUo kg n1m;s und"rgo"$ ul l f O ~ C S S in which its Slli!Ciliu ~ n t r o p ~increases from kJikg K to 0.35 kJikgK. Ar lite srunc rime. tM ent ropy or thesurrnunuiugs doen::ascs !Tom 80 I.J/K hl 75kJ{K. Whul lhc type u( this ~ ?IL Rcvcmblcb, l.rrevetS tblea. Impossibled Nm rdenrfliuble "ith Lhe dam 1,1iven1\vo ~ w r s b l c en1pnes tin! working '"serie f i x ~ h0\1l'lln the c,o.IJ, ,,r rclligcraung muchinc beimproved1a. By raisiu_g the !Jigbe.r e m p e r u t u r ~b. By lowcnng tl1c lngbcrtumpernntrcc. By operntin!l thl! mucbine ;n higherspeedsd. By npernling 1hc mdchinc m ~ < ' e rspeed$26, \Vhalsfarc the cffect{S) ol';upcrsaiurlltl(mIn nuu k nuw'l

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1 11 mcreas.:s 1hemuss now2 IJ tnQcases h e ~ i o n in lhe nozzle3 It Ull


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l supersollJc !ltfTuser4. subsruuc tltiiuserWhkl l oflhe n t c m e n s !\II n nbow f$iareC < l ~a I onlyb 1nml4c 3 o n l ~(! 2 lllld 3Consider the fo llowmg staiemems;I. fusibl" plug IS u ~ \ l c c used I


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1\ D C Da, 1 4 3h. 4 3 2c. ' 3 4d. I 2 JA ho llow corcular secifou m u wothOUh!l diu1nerer 80 rum und i111or ~ t c r60 mm ts subJected to bucldmg. What isthe rndlus uf gyr:nton of the cuhum1secucm1n. 2$mmb lOmmc, I.Smmd IOmm,\iatcb LISI 1 1Hardness Test) wotb LIS! UIMei\Sute i lf Unrdllcss ) and s c l ~ c t lltcoorrccl ansWL'f u s i n ~ the giwnbdbw thel.isr IA. lWei. >C!llB Brine.LIC. VickersD Scil!ro$C0t)>;Lis! III , l i < l l ' f u c ~ noo::otJf uo( lcllhtllttu2. Pl'ojeetc.d arerl d c n l ~ oi Depth or pcnetmrio tl-1 Heil'l" nf reboundCodes. A B C Da. I .3 2b I 2c. 3 I 4 2d. I l 4 2Examine tile Jigure shown below whe reto!hi! l l l n b e r ~ 111dica1e the hnks'

I)Which or the statements gh en below~ n r r o o

h.1> ;u " ' v e r p c n c l i c . ~ l l n r l11 QS2 lu :u "' pt'I'(Xltldlc.:ulur 10 QSJ h1 ism T-1 !.;, Is l . l l ~Sci.XI cdntcl u t \ ~ \ l < r S I I I ~ l'


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b, Doundnry lubricated bcmngc y t a t i bearingd. Hydrodynamic bearing44. 11tc pcd'mmanec of n y mjnurnl bearing ill a fun tt ion uf

a.. .Reynolds numberb. Summorficld numberc,d, Bearing modnhJS

45 Which oue of t.lto: lilllowittg slnu:men ts Jono! com:cl'lRcsp0111


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In an operation process chan. wllicll ol'rhefolluwlng arc rccnrdcd?1. Operation2. luspcction3 StorageSelect the conect answer using the codegiven bd owa. I and 2h I and 3c. '2 nndd. l r l and355 Asscrt.luo tA ): t\ rod ot' cin:ular cross-section when subjectccl to twisting actiondoes not experience tulJ change rn cross!lectionalgeometry ,Reason (R) Stress induced in the sectionls ~ l s y m m e l r i ca. Both A and Rare individually rrue andR i" correct txplanaJiool of Ab Both Aand R. are individua lly hue bu tR is IIOlthe correct Mplanadon orA11, A is true bw R Is ta lsed. A is false but ftis moe

56 Asscnlon (A). 14eningbonc gears are usedFor high speed and ltcayy dto ty speedreductionReason (R)l These geurs produce l a r g ~axia l thn1s1on their shafts11. Both A and R are I di"Vidually true and

R. is c o r r . x ofAb Botb A and Rare individuall y true butR Is not the correct explanatfonofAe A true but R is fltl$ed A is false butlu s true57 Assertion (A) flydmsmtic bearings atesuttnble for heavy load and low speedap plications,Reason (R) SuRiciem hydrndynamiopressure is notgenerated 111 the tluid filma Both A and Rare individually true andR IS thecorrectex planauon of Ab Both A and R are. Individually true butR is corteet explanationof Ac. A is true hut Ris fa lsed. A is falso but R is trveAssertion (A); A shaper is unsu itable forgenera!io.g nat suoaces ou very lsrge parts.Reason (R) . The ram has limifanons on lhesuoke and its overhang.a. Both A and Rare ind ividually tnoe andR. s tlle correct ex planation of A

7b. Both II. and Rare individually ttue \lu tR. is oot tile o r r e c t u . ~ p l a n a l i o n ofA

c, A'is m te bul RTs fa l.sed A is false but R is ltueS9 1\.ssenion (A) Complex which aredi li cult to prtld1oce by nny other methodare possible by precisiou inves truc.ul

cas tiug1Reason (IU In precision onvestmentcasti ng, !Joe pau eo,l is withdrawn bym t g it 4;1. Both A and Rare i n d i v i d w ~ l true andR COITL'Cl e-xplanation of Ab Both i\ nrtd R are individually lnoe butR is nut the correctexp lanation uf Ac. A is tnoe but R Is fa l$ed. A is f:1lscbut R is tnoe

60 Assertion (A) ' Fire 111be boilers dOJ not usehigh pressures unli ke water tube bo iler:sReason (R). rirc tubes fail duo to creep li Lhigh prL'SSUfCSa. Both A aod Rare individually true aodR is lbe currecte.xplanatiou ofAb. Bo tl1 A and R are individually true butR is not the correct explanation ofAc. A o lf\te but R ts fa lsed . A is fruse but.Ri.s true

61 Assenion (A)' R ~ f r i e r u n t S R11 R.,,have a j!fe81er impact OIT O ~ O n e ,;iepletionthan R27_Reason (R.}. R:2 has a larger nt.1111ber ofch lorine atoms.

~ BoiL A and Rare iudiv idually uR is tlte correct explanation of \b. Both A and Rare individuaJiv true bulR is nut iJ1e correctexplanation of Ac. A is ln le but R is f.1lsed . A is false but R is uue

., ..T\\1t1taincr asshown In lhe ligu re given above Top.:yliuclcr has a weight W wd bo!(Om

~ " ) ' l i ~ bns a weight or2 W8 J w

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n ~l'he l i g u r ~ gJyen above showS n clumping,dcl'icc operated by the mpllt torce I on the1up.: What is the ma!.loutudc of oequirodonpul fo rce i f he claniPing force t$ 411 N'la. :iNb. IONc. 20 Nd. 40 N

J1, ., '"""" , ""A I'll- i. ~ l i n g on lltlOr II llh C l ' ! f f i Coffrftloon equallo () 4 At 11 h.11 m u ~ l m u mh ~ r g h t 'H'. may lht' bux he pllllelll ro t "Inmove 1 ~ 1 1 h tonlfonn 1elocuy 111\1101rrovcrrumwg? II = 30 monb II 1.10 mntc 'H 75 111111d II = l50mm&_ '' \f\ .r "- -In the ubove given ~ t n n : all themcmb\.'rs are equal '" length nnd the Jomtsnre pmncd nnd m o n t h It cnries a fond l ' n10 along DG Whot os the rencuon ata. Zerob VertJrn!ly up11atd$ and ~ ' - l u a l P/4c, V c m e < ~ l l y upwarqs and equlll lo 1'/1u Vcrtit:nlly upwunls Ond cquul 10 P

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If a weoghl ~ ; ~ I ' RO N i$ $tospended h) tw11ljne light string& one of h e l ! t ~ h u ~ o n l 1 1 1and Ihe other is mcllllednt an angle ofJOto the honzooldL lbco wha t os the ~ e n s t o nin JliC indmcd stFtnf!?a. I >UI ..fS Nl> I60 Nc. I-tONd 121) NA spung of stit]jocss k o ~ o m pressed by alpnneiplec. l'nncoplc ofcon.wrvation or cnurwd. l'nncrplc or' conservnhon ol'momcnwmA Stone ts droJlll


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I IaSyStems A t i n ~ B hilvill!l tlltnUC


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l f a simply s uppo11ed beam at iis ends isloaded by a contra! CO!lOOrltrated load, thenthe maximum bend ing momenl js.M lfthesame load is equally distributed over thebenm, tben wha t. is illi maximum bendimtt11oment'? -a, Mb, !vV2c M/3d M/4Cooslder the shear force diagram shownbelow.o ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ = ~ H

em----+Whicb cype of loading give(s) this SFD2I, l'oNA 4m c _T0JcN"'-:--+L-4__\_-_ _ _ : . . , ~ l t o kN! 6 -Time; a 111

IQ kN' liOkN]-f c _1ml .Select tho correct IUISW(lJ" tJSin tbe codegiven below ~a. J onlvb t and2t 2and 3ci I wld 3Which one of the folh,win.g sta tementS iscorrect'?Gang process t hnrthelps us in identifying the groupleaderb 1, used for 61Udying the acrivities of agroup of people working togethert , has the ba$iC piiJl!Ose to analyze theactivities of a gr011p so ns to reduce tominimum all 'lahlng time and delays.d. uses operation and. trlltlspo iationsymbols to IdentitY dotferenl activitiesof people working together, so as tored uce tO a minimum all nonopermionaJ times.

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IIJ o( 14Consider the f o l l o w i n ~ stmenten!S ttlrespect of motion economy a w d to llleuse ofhuman bodyI Smooth continuous motioos ofh8J1d are pref-erab le tO ' zlg-zagm o t i oz. Rhytl1m Is essen tial to the smootlt andautomatic.performance ofarl operationl . The hands should be relieved of allwork ihat can be done moreadvantageously bytJil!- lhturc or footoperated de vice.Whioh of the .statements giv en above are

c-6rrecr?a, I . 2 and 3b laud2c. 2and3d. I and 3Moti()n economy is better ach ieved bya. Metlood studyb rime studyo, Work space designd Process plaoningl'hCJ bligs areassociated wrtha. Fatigue allllwance in workmeasurementb Efliciency of theopemh)rc. Schedulio!! techn iquesd. Blementary niotlous iu time&tudyMatc.b List I J o ~ ) wi1h List II (ReconlingTechnique Used) and select tl1e correctanswer using the q>des givmt belc"v the

U ~ t sList 1A, e n c c s of manlfactllt'ing operationsB Factory layout to indicate the

O V ~ m C J l Of a t e r i a l ~C' factory layoot to indicate themovement ofworkersD f\Utomatic operationsListllI Flow p m c ~ chart2. SfMO chart3 SLring diagram4. Outline process cbart5. Mu lliplil acrtvity chartCodes, A B ca, I 3b 5 J 1e. " 2d 5 3

D5454

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The totn l oberved time for an operotion ofii.SSembliJ1il an .:lectric: switch is 1.0!1 mm .If lh mins is 120% ond nn allowan"" oftoo i o w c fuo the IIJl"'"''ion, 1vhotdoe l > t 1 1 1 n time?o, l32 mmh. 12(1 mmc. 0,12 JllJnd. L3Q fTWIWlmt is an aM lysis of methods. nUltoerinls.tools ond equipmmts us"d or to be used inl)oc: r m ~ n ~ of;. piece gf work .:,1ll


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Wl.at is Ute fon.t required to l>e exerted hythe punch in order to shear otot lite blank(fmon circulat d i ~ c ) ol' 2() nun d i M t c t ~ rJutil 1.5 mJll t b i d n o e ~ :sud huling o $hoar. trength oqun l to 30() lv!P:t?o 'l.O i on the dio:c. both on tltc w 1 t . ~ 1 and lhe dietL N"ollhor ou the puncb nor on t l tc dieDuroy-Wol!baclt equation for the !toad IO>J>in flmv t h r o u ~ h n is given bybo = 4 r 1 v' i(2gd) (the l $ } ' m h ~ b hnvc the~ u . ' l l m : ~ n i n g F< lite

f r i c t i ~ n fuotor f Vlll') ln tho; CCIQJillg C()i)

l c m p < : f ~ l u r o is 25" C. \VIu l the- b y p ~foetor l'or U1e= e ofsensillc cooling?a, 0,20

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b, 0.25c U,50cl. .0,f rcfrigcr:tliQn cool> '20 mJibr of wotcrenting ot 12 C. \Vl,.t. i the temperorurcofwtcr n g the ~ l l e r

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. s tb. 6 l '1!. 7" ccl. 7.5 cMJitoh l.isl I (Rwctpr) with Lit U

h u r n ~ t e r i H c nd the "o rrecl" ' - ' us il\!! the ccKItsLil.l JA PcltottH.. FrnnciC. Propeller! ), Kapl:mr i.11nI OJ2. 3.03. 4.04 . LOCodea :

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I l l . WI1ich of the following tatements l$ tt1lelor the c:lSe tmnofer line?a, 'l'be work st.atiollll nHl< t form a closedloop.b, 'The "o\'U lo lim !! is total lime t.akt.'O byall the macltmmg p o r mc. t\11 the m I()Ol ' t mut l>e

aulorn:tlie..d. All lhc maclilile tools must be ofC(IO'-etltlon.11 and generolpurpose type.

11:2. Wlncb of ih" lbll0\11ng 1;. not c h . \ r o e t e r L , uf the cllmb rrul lir1g (dow nmilling) optrariun?n. The wort: piece is fell m 1he oppositedin:cll

II of 14n. High luirdu essb. High compt'tSllive stren gthc. ~ U1crmal e()nauctil'it)'d. High b r i l l l < : :1Hi . Which 11f the fnllowing !he r e : t ~ ( ) forlow vn lues ofUnre(onned chip U1 ickness ingt,Jtdin&?1. Smoll !lf3lm2. High culling speed3. Low fed rnto:S ~ l c \ . ' 1 Ut e com:ct " '" '' " ' ll'>ug the codegiven o wa. l,2 ind 3b, 1 and 2e. 2 3d. I nd 3117. I f "" undct(mned cltip \ i c l ; n ~ s . . . c.hip

c . ~ and P ; hoar angle. then "hut ithe len!!.th of the hear plnne?a, I oiu

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Mechanical Engineering Objective Questions Part 12