Mechanical Engineering Objective Questions Part 5

7/30/2019 Mechanical Engineering Objective Questions Part 5

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I(t..t:-1'1'\' 199R I I ot llI MECHANICAL E N G I N E E R I N _ G _ ~ _In a se1ruinlin1L nar pla1e sbow '" the!igwe. the dlCOieticul sl!css t:oncentru!JOIItilc1or K. for an p t i ~ a l hole of majorU.\iS 2n and minor axis 2b is given I)t f

IC I " .> ~ - C o.oa. ""=albb. K, & I +-u/11c. K.= 1+ 211/o


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b. 817 tc 16/15 td. tli>e perce11tage elongation ol' m a t e r i ~obtai oed tfom statlc tensioij test dependsupon thea, d i a m e ~ e r of he test spooimenb. ga uge l e n g ~ 1 of the specimenc. nature of end-grips or the teS1ingmachined g ~ m e t t y of tbe test specmenMatch List T Tenns used in thin c;ylinderstress an alysis) with List II (Mathematical

~ p r e s s i o n s ) and thecorrect answer;t..ist IA, Hoop Sl fCSSB Maximum shear stressC. Longiwdinal0 Cy linderListUI pd/4t2. pdl2t3 pd/2c;-l . pdl8tCQdl!ll,

A B C Da. 2 3 L 4b. 2 3 4 Ic 2 4 3 Id 2 4 I JA thin cylinder uf d l a m c t ~ r ' d' artdlhick,ess 't ' is subjected 10 an intemalpressure p 'rhe change in diameter is(Whete ll is tho modultis ofelasticity nndis the Poisson's mtio)

ptl=a 41 F(2-ft)b '" ' (1 )- +l l2/lr .c, p[ 2.t-p)1Ed pd (l - )41 R !1l'wo ideuticaJ sprirrgs, each al stiffness Kare assembled os shown in the giventigure. The combined stiffness of theassem bly is

lui IJ

a. K2b. 2Kc. Kd. 1/2 K

13 Two close-coiled sp rings 81'1! ~ u b j c c toUm same axial f


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3. Stellite-1. l r


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II (Pl'lll"'rty of I O i d n ~ , g COniJ'IlSih OII) findselect tbe correctnnsd. 14-1Smndantiznuon ofpmduc1s is dane toa l.'liminn1e e ~ . ; S R f ' l varfe1.:s indesignb shnplity mwmfnc.111nng prO


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30) respecnoely. The (X'. II} ~ t H l r d m n t e s ofthe opumAI IocnUon lllt>uld ll for euchmnchlne I' IT A, B, C D, E, H Md JWnich one of the shown roures ts 10 betbllowed Jor 111M11nutn J)roducttvtty?

: - ~ \ ~~-RMA-R-C-EPb. RM-D-B - J - FPc. RM D- l3-C- FPd RM- E H J fPTl1e barometric pressme -at tbe base of am o w a u t L ~ 750 nun Jig nnd 111 U1e top 600mm Jig. If nwmge roir e n . ~ t y Ikgfnl the height of the ll'lllllolain isnpproxtmatdyII, 1W()tl1b. JQOOmc. 4000mct sooomII system ~ r g o e . < > 11 chnnge of sta teduring which 80 kJ ofbeat ili 11'BJ1Sferred 10It and it ~ 60 lJ of system isi)mught hncl In ots orisinal sta te t l l r o u ~ : h nj)I'OCCSS dunog whoch 10() 1J of 11tlll I$lt'Ut\SI\:rrcd 1(1 II Ihe II'Ork. d ~ l t i C b) II!


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:Ort..ct answerLtstl;\ , JrreversohililyB. JOUI lloomson experimen tC. J o u t e ~ e ~ e r i m < > n lD. Rc:v=iblc ""WaCSUst nI. Mech>nicol oquivnlcn!2 11"hemlodynamic tempcrntureSCl3.1c3 Throltling pr!td modertl!orOf lhc:Jel ,will Include

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b Tite bipdes nrcwing typec. There are tour toell!llt bladed. Tl1c blndt!l cun be otlj11Sted& ~ e d on the. direction of llow. Which neof the fnlluwing t u r h i n ~ is different trc>mthe Cther thr

l . c n l J " ' f l ' l l l r ~ of-.. e c r t n uncl


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The difference between the c:omtort air.:.')cL point which divldos ESHJ; line in

pmportion "' x (I-X)Ute v e t : t i ~ a l ~ o m p o u c of the h y d r o s l l l t i ~fon:e on submerged "urvc:(i w:fnce ~ t h en. mass orhqmd n:rtio.ally above 11b weigbloflhe liquid ,ertically above tlc. rorc.l on vertical projcX:tion of thend'acecL produo!l oJ' pressure al t.he cefltroid nnd

the i!Utfucc nre:tl f 1 bydroulie.. press bM rnm of 12.5 emdinmeter nnd plunger of 125 em dinmeler.what fo.-.:e ' ''ould be rJuired ' '" theplungU n d c r g n ~ :1 riS.id bllll) lVpo M m(llilm11 hen it is sul,jcetod I!J 110 C ( ) q s ngulurvelucifyb. ~ ' ( l n < l . 1 n t "llgltl:tr c e c < : f ; o.;, lincllrl)' varying vel


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Reaion fR) : 1l1e equtlibnnm requires llwtlltel"esUitant fotce acting ove r holh is4. Bulh A nnd Raoc true llnU R is thet!Ou'O:et c:,:plaontion 01'Ah, Bl>lh \ nnd R ure lrue R i NOTthe: correct c'lpiM(ooi on ol'Ac.. A i\ true bur R i< ( a l ~ e

J. A is fal.li e butR is true89. Assertion ( \) ! The 111 t>endingmlmonl bttwecn two " ' ' O o s - J ~ e c l i o n s ol' "bt:u111 "'Jlllll Ill the reo uf the h e a r i nti,rcc diogrm hctwc1) the: hm section.R e ~ m (R): l11e chnnge in fhe she:oringIo ree: bttwc:c:n \Wil t : r ( ) $ S C : C : o rbeam due \o distributed looding i.o f squarecross-section has g reater bnckhng stabilitythan ~ l o t of column (1 cireul crosssootion of aame length : u n ~ nmtuia.Ls.:.me end conditions and s:.me ;treil ofllto-seetlon,Rt:ru.uu (R) : '11oce.>lld moment of>Jc:a of" Column of circular croSJi ..lUilclion I.

m ; o l l e r ohan t h ~ t o!' co lumn qf.q!hn:c r < ~ ~ lnoving ~ m " ~ r e n .4, BoUt 1\ :o.nd Rilrc: true and R is I l l ~ >e.o)m;cl I A ~ I t O n olA1!. Allth 11nd R trUe htn R is NO,.Ihe o m : - c t . , X p t i n n ufA1:. { \ is IIUO 'R is fn lscol. ' ' s fo L.e but R i lrueJ I A'li'eniun (Ali For liore:&CI cuLt hog thespeed ~ 4 : c l c d on d lathe is vc;o'Y101\ ,

R e : ~ (R): The require na. BO!h A and Rare lrlli: n


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101

I Sum of tbe forces along X-direction isz ~ r o2 Sum of the force along Y-direarirm is1..ero.J . Sum or the mom n S of all fo rces aboura point iszertl,

Of hese stale)llentsa. I and J are correctb 2 Bllil 3arecorrectc I Blld 2are correctd. I, 2 and 3 arc correctl 'hecquation of motion o(boib isgiven uys= 2 r +Jt2 + 7 (where s is in meters nod 1is in seconds) SIRI1ing livm !'esttravel in 2 seconds. a distance ofa. 35mb 28mo. 27md 20 i l l

it wil l

f he l " o ~ e in the T \ i C H b ~ r ( I) Qi' .the trussshown in the figure is- lOl.Hw v " ' l ~ ~~ ~ v ~4 ~"' i lNj


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J m a s ~ ortM 11)1 whc

"'b 5c. (id. 11

11\Q. C o s t d ~ t !be followmg t u t c : t n ~ o ~The 1\le'" c o ~ fo r crunkm c ~ h n n ! . m wi th cr:ml: ro1111ing nt ~ u n t a n tvc locit pro i d e ~ Value uf Grwcrnor) wtth LtstII (Cburnct&isllcs) and ~ l ~ c tho correctanswer:Ltst IA lsochmnous govc.morB Sen it ;, c g,warnorC Huntiru; gll\Crnllr0 Stable j;DvemorLrst III. Corumuously t l u e abO\e 1111dbelow mcM speed2 To r CltciJ JAhen then: I> unl)' onerodius tlf rotntion3. l{igher di;;placemenl of sleeve forfnttUonnl h n n g ~ ofspeedEqudlbnum ~ p e e d don,;tMt for nilmdii Q f rotationCodes:

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1JI2Consioer tlte fo llowing statements.

.An in-line four-cylinder foiltstroke engineis complete balanced for,I Pti mary force,1 Secondary force.3 Primary c.ouples.Secondaiy couples.Of these staicmcmsn, I, J and 4 are comlctb I. 2 and arc correctc. l and 3 are c.orrectd. 2 and 4 are e.orrettA unifonn cantilever beam undergoestransverse vihrations, The number ofnatw 'al frequco cies associated with thohfiiU11 ISa. tb 10c. 100d infiniteTwo vibratory s stems are shown iu !begiven .figures. The ratio of nnruralfreq uency or longitudinal vibration of litesecond s stem to that of the li rst is!! .a, 4b. 20.5d 0.251 shaft s ~ p p o n e d on two benting atends carries two Oywbee ls 'L" apan. Massmoment ofinenia of the t"o Oywhel ale1, and It,. I bei ng tho rolar moment ofinertia of cross-sectional area of tbe shaftOislallce In of lbe . t n o d ~ of LOrsioualvibration of tile frQtn Ute-Oywheel ll1is

I _.J:!.La. t ~ . - 1. +1,

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b. I =___y_.. 1,. -+1,I u.c. - 1. +-JJ.,.- 1

d I,- '- 'l, i -1 - 1A a c l > . i ~ a gearofinfini di LD1ell:rb. infinite modulec. zero pressure

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Mechanical Engineering Objective Questions Part 5