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l ol J5

MECHANICAL ENGINEERING I

I. l'hoQrcticnl vnpcmr compression rdrigeraliun cycJe is represented on n T -s diagram as

2.

•

Mfuch List • I I Ellcd.) with Ust • II (Process) in the c~tse of nn irlcnl refrigeration cycle and sek.a tJ1e correct unSII'Cr using 1hc cvd~ given belo11 th~ Usts: Li$t- I A. Wurk input B. Heal rejection C. J.>xpan~ion

D" Heat absorption LiS1 · II I , Con~tunl pn!SSUI\!

tcmpcruturc 2. Isentropic compres~iou

Ul higher

~. Consl1lnl tempcralure nt lower pressure 4. Adiubur·ic

3.

5.

6.

5. Codes: A 13 c 0

0.. 4 I 2 3 b. 2 J 4 c. 2 l It 3 d. 4 2 3 A Ml~l) compressor I~ usetl " hen a n:li'igcrnling ~) slcm hns to hnndle u refrigertuu wiliJ a. low specil1c 1 olumc und high pressure

diiTcrenoo b. low sped lie volume tUld low pressure

diiTcrencc c. large spcdfic volume and hi£11

pro:ssure diO'erence d. ldrge Sped lie v,,lume ond l011 pre>;,ur~

difference For the same condenser ~md cvuponllor temperotures liJe COP of ubsorptioll refrigerntiog system is less than that of mechanical vupour compression rcfrigcrnli•lll system. since in the absorplinn reli'igcmt·ion syslem. u. u liquid pump is used li>r con>pression b. a reliigemnt as well as o solvent ts

used c. nbsorber re<IUires heal rejection d. low grucle energy is us.:d to run the

system If air at dry- bulb tcmpcmturc ol' 35°C and de J><)iut temperature of 200 C" pusses tltrough u cooling coil which is tnnfn­tarncd ut 25•c thc.n I he proc<:Ss wnultl be ll s ensible cooling b. cooliog and dehum.ldU'icatiou c, eQOiing uud humid)fiC!lliOn d. COQiing ut t'tlru;UUII wel bulb

tcmperuturc Tite process in a hm ''atcr spray wusher malnt11incd at u tempe.catun: ur 40°C, Ouough which unsttlurured ttir ul I 0" C dry bulb lempcmture nnd 50% relnlive humidiry passes. is a. sen~iblc henting b. humidil1rut.i<>n

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1.

8.

9,

IJ.

12,

~- lteoling and hllinidili~U>Iion d, healing nnd dehnmidilication ln r<)Ol,n air..:onditioning for comlo>rt. the ~upply oir in summer shOuld be at ~- the ~nme tctnper~tute ns thnt or tht"

ruutn b. 5 to 10•c b~low the room Lcmperoturu c. 2 tn J"C above th<> room tcmiJcrallln> d. 111 o•c ill Ute """"'of~ ~ooling coil with nou-:r.cro byp•ss J·•cl(lr, lhe •ppamtus, dow poml temperatura lies at the int<mectinn p!lint of n. room DB bne witb Ute saluratlon ctlf\le b. RSHl' ami GSHF ijnes

.:. RSHV 1111d ESHF lineJ d. GSHF lfne wlth I he safurat!on curve

In " " oir-<onllitiqninB proce.;~ 5 k.Itmin heat L• c:xncttd from u rnQm. If thot ~ensiblc hCllt fui!UJr is 0.8, tbc:n Ote Jntc:u1 hCilt extt•cted will be

•• 4 kJ/min b. 2 kJ min ll. I k.l min cL 0.25 kJ11nin l'luids that requlre a gradunlly mcre;~>ing ~hear srress to m::unt:tin :a cc)nstant "1r:iin rat.e are known n,<

• · t'boopeetk fluids b. lltitc~olmpic lluids e. pseudoplastiu fluid• .1. N"'YIOJihuJ Jlllid.s A weight of iO lotm<• i• nwved ov"' a distance of 6 m ooro,. tho deck of" •·osscl of 11!110 tonne~ floatmg rn wnt.,r, ·n,;. makes~ pendulum nf lengUt 2.5 m swing llirough a dislllnc.: of 12.5 ctu horizontally. 't'be motncomuic height of ihl! vcssol i$ -

u 0.8m b, I.Om c. 12m tL 1,4 m I he fr.tcti.;m of tl1e voltone of • Joli<l piece! of metal of rel•nva density 8.25 floating nbliW the ~urfoce. of n conlaln\!1' of m.:r~' ofrololn•c dc:Mity 13.6 is 1L L648

t>. 0.607 c. 0.393

d. 0.352

2ol IS 13. Conoidet the tbllowing ~Lotemcut~

tegardln~ stability of floating bodies: I. If oscillation is ~mol~ the position of

mctacenu~ of • Oonting body will not •li~a: wh•lcVL-1' be Lbe JL~• nf roU>tion.

1. For- a llonting vessel conl.:lining Hquld CDr1!D· the alability IS reduced due to movement• of ce~tter ol' gravity and t.'llntr.: o [ buo~·ancy.

~- ln \lorsltjp> nnd r•cing bOD!.$. U1o nt•Ul~<>ntric height will h••'C! l(l be ~mnlltl)leducerolling.

I )ftbese stolemenL• a, I , 2 and 3 .ue coJTeC~t

h. I and l ~re ClllTect c. 2 alone is correct

d. :t "21one t; eorrect

14. For • •lre:!m fnnctf!ln l(> esi;t. wh•ch of th<> !i)III!Wing cunclitillns Rhould hctld'l l. Ole llow should ahvaysl>e in~~atiounl 2. Equation of eontint1ity .should be

S.1tlsfied. -'· The lluid •bould be incom1orc-.ibl!>. 4. l!quatiou of con~inuity and ruomcullun

il10uld be ••Lis:fied .Select the wtTCcl answer using the codes given belmv:

t"'otles: a. J,2.,and4 b. l , ~and -1

~:. 2 and l d. i alone

15. Q. 15. In a stca<l)'. lncumprtssibk. IY<u dimcosinnaJ flOW, Qltt VeJoC.il)' c.t)lf1J){UIC.'11t in the x-din=cliM i~ given hy

16.

u-;. ¢ iu xy. The veloc-ity c.omponcut 111 U1c y-dircction will bo

" · ' = - c(s+ y) b, \ =-C.'l(i 'j

c. \ 1 =- xy ll, ' - cy '<.

Th~ los.• ur hend m a pip" orcertnin hmgth currying • r.~t<> or flow ~r 0 is 11lund to b~ li. If • [>ip .. of twice u.~ diamutcr but of the 8Dme length is lco c~rrY 4 tlow rate of 20. then ~·= het~d IO'>S will b= a. H h. R'2 c. H 4

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18.

19

20

d, H/8 An itislrument 11hicl1 offers no ob=itruotiott ~~ thl.' now oOi:tii no nddhloual h'tls and is " 1itublc lor h''" rate mew;uremenL~ is a, Venlt1nmeter b RQt,am<l<r l . Mnguet.lc ff()w met of d llcnd meter The MINIMUM vuluc <'!' rt·ict11111 l\tc1or • r Linn can nccw iu JJUniJiat Ot)w through u CITL-ulw pifl'! is a. 0.0()4 b 0.032 (!. ll.U16

J_ 0,008

Consider the illlll1wing statcmcnl~ c(lmpllfing 111r1J\I I~n1 bothl<!Jtry luy~-r 1111h lammur l>oundnry fa) cr. 1 htrhulem boundnry luyers ure lluckur

than lumwar brlundlll) luyers. 2 Velocity in turhulcnt bl!undnl) luy~rs

in more uni f<!nn 3 In ~ of a lnminnr boundHr) lay~'!'.

the thickness of the boundary layer tncreases more mpldly liS the UlSlruJc~ from lite k'l)(!ing. edge to creases.

.j For the same local Reyuolds number. shear s1ress at the bouudnry is less In the case of turbuleul boundnry layer.

S. Of these statcm~!lb 11. i . 2. 3 aod 4 11rc oor~ct

I• 1 und 3 t\re correct .:. 3 und ~ are o.'rrect d. I and 2 are correct A bull u; thrown vt"rticntly upwards lo mr 1•hich ofl~rs resistance to motion. Tite ball taken t 1 secon<k while going up and b >cctmd.• 1~hllc Cdmtng il<l'\1 n Assertion (A): tl 1s more 1hnn t1 !lenwn ( Rl inc total qwrgy ol' Ute hall contUtually dc~rcascs lienee uveroj!c Sf"'OO of the ball Whll~ coming ti0\111 is les.~ than thut wlulc gomg up. u, Roth A aJid R 11rc true and U " the

e<Jn'ecl t-'lplauation ul' A b Btllh A ~nd R are true btll R IS NOT II

correct explanallon or A "· A is true but R is f.1lst-cL A is ll\J~e but R is tru~

lori S 21 Ass~rtion (/\); 1\h inversion is obtUIIIO(l b)

Filing in turn difli:reot lmks In u kinemati~s cl1ain. R<.'t!Son (BI: Qukk rctum ntcohallf$111 is dcrh-cd from singk sl idcr crnnk chain b) fixing the t.lm 111' n shap<'r with the sloUcd lever through a link. a lJOlh A 1111d R ""' true und R IS the

correct cxplnnaltc>n of A b. Uuth A ond R t\re tnt~ but R 1~ NOr o

C<.)rr.:cl t''J'IIamtlion of A c. A ,, t= b•u R i~ til l~ d. II IS tld:;c but R IS true

ll. Assertion (A l: Gc.on; 11 fth tnV<lllllcS tuoll\ profik transmit ~on.~lant vdcx!it) ratios bel>l••~n shal\s Ctlnn~cle(J h) them. R.casnn (R) For uwt)lUICS geot!<, the C\llllnll•ll 11l!riiiOI Ill j]lt: ll''illl (If L\11 1l~CI \1<itWecll fltlii:S Of te~:t h lll\13)'~ r :JSScS through the pitch point. a Both II nnd R are true nnd H ts 1he

r<1rrcct csplanauon of A h Both A nurl R urc true but R is NOT n

correct 11.>.plaualion of A

t . A Is true but R fs lillse d. A ts lillse but R is true

2J Asscrtiun (A l An nir-1\K:Iose' vul"e sbould be used to cm!lrol ~Je fud supply til the rumuce Rc111son 1 !()· In the Cl't:llt of rur failure, the vttl w Wtltdd be clo:.ed Ill ttl I he fuel is ~ut ofl'ra prevent ovcrheuung,. a. Both A nnd R are 1n1e nod H is th~

correct csplanat1011 of A b Ooih 1\ 1111~ R arc true but R IS NO I' II

com:ct c~phtnntit•n of A ~. A i$ lr~e but R is fll iSI! d A IS (nlsc hut R IS tnle

24 A sleet shnl\ wilh buill-an ends Is subjucled 1n tho: uctlon or • 1orque. Mr urpJIL-d nt an mlcmtediat< on>ss-scctian ' nm· as shtJwn in tbe giwn ugu~.

A f· - -· .( t-~~.'Mfti . oo::.N n

. • --t

r\~Sl:rtilm ( 1\ ); ntc tnugmtutfl: Vf IJI~ twisting lll()lllCJil lO 11hlcb the n~nlon fiC

- .\Ia rs >ubjecr~~ iS -·-u+b

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25.

R~~·~n (R): Fot _gc:-omctri~ compocibility. An&le tlf 111 i~c nc ' mn • is the sume t'or the pcn1nlns .m >nd BC.

:L J3otlt A Jn(l R "''~ lnl~ ~ml R iM tlo~ "'"""ct c.~plrumiion of A

b. Both A nod R nro tru~ but R is NOT n correct e"(llnt~>Hon of A

c. r\ i~ true bm R i.• f•l•e cL A is f11lsa hut R i~ true A!!Sertion tA): I)DISMon 's r:uio os n man•urc 1>f th.: lnctrnl .crnin m all tllrrelllms perpeodicuhr to aftd in too•nos of lfoe liu""r StJ11.lo.

Rea~on (R): Tile nahm: of lntetal Slrnin ln n unoaxinli} lc>aded bar is c,pposite lo thnc 111'1he llneantrain. n, Bolb A and R are tn•e and R tS tho

COD'Ocl CJ<j>Ltnntiou of .\ b. .Ootli A and R nre U'IJ<! bul R is NOT"

con'ecl explanation of A e A i$ lnte bul R ill f.,L<e d. A t• l'o L<c lml R is true

26. A.,crtion (A): Cutting tools made of his h carbon !ileel have ~horterloollif~.

Re:'"t'" (R ): l) c•rins mach in in![. Uoc:- cip nr llta eutU/Ig tool is ltoalod ICI 600170\l• C which taUMos lie~ 1001 lip '" lo•~ il; lumlnes•. • · Both ;,\ and R are true. and R is the

con·ecc explountion o l' A b. Bolli A ~nd R are true but R i< N01 ~

.:On..,c:t "XJllllriJllion bi A c. A is lruo but R i• fal,c tl. A is false but R is true

27. As•o!r!Ioll (A): Clow ilimonJiolllll tol11r.U1ccs o.N NOT pooslblo wllh isooralic pr..s•ing of metal powder in powder m~tallurgy teehniqut>. Reason (R); ho lbt poocess gf i•ocrntlc pressing. the p.rcssuro is C<t\llll in oU directl<:~ns winch permit unifonn densi~ of the ·mcc~l powder. ;1, Roth A ~nil R nre 1rue ami R i~ lhc.-

0\)n'cct cxplunation. or A b, Both A ond R ore true but R h NOT •

con»cl explauntion of A c. A is I rue bul R is ful-.: U. A is' f11be but R is lri'J:

28, A!!Sertlan (.\.): Spllt bond l)'l'~ slopwnlcb is pretCm-d In Lime scudy by stopw•tch method,

2\l.

30.

:n.

32.

,J of IS Rc!IS<m (R): S plit h1111d 1ypc stopwatcl! eliminaco.; possihilil1es of deln~ in nohng Ute o-cading;;. a. Both A nnd R uc U'Ud mtd R h the

cam:ct ""J'IAnatino nf A b. Both A and R 11.n: true but R ls NOT •

com:d expbnation oF A c. A is I rue btu R is t:.lse d <\is false but I( is tnte AliScrtlon (,\): Whm i gn~ bt forced steadily llorough an msuiJtl«l ptp.:­cot>lll inutg o poruu,; plug. ""' <:ntllalvy uC gas,. Uoe&'IJIIeon both 'idas of the plug. RC<~~oo (R): l11o g~s undergoes on Lsentropic ex]'1n11•ion Lhmu&)o the porous pluw. 3 , Both A and R are true arul 1l is ILc

cocrccl c:.~p iOllltlion of A

b. Bolb A and R "'"' 1ru~ but R iA NOT.., co,..,d ""Jllon.11ion of A

c. 1\ is true btu R is fabtc d. A'" false bul k 1s true Assertion (A): When solid CO! (dry Ice) is e:o:posed jo the almosphere, it gel• lunsfonued dio'l!ctly into VA(l<lur obsul'binl) lhc lntut11 hcot of •ublimntion front the •urroundings. Re.1s<'n (!<): The lrlple point •It' Cfh cs ~~ about .5 •lmosphcn~ pl'llS.Sttr~ und at 216

"· •c Boll! A wtd R ..w true ond R t< lbe uom:ct eXplanation of A

Q. llolb A ond R = true but R ;, NOT • conet:l o~p l••~1tion of ,\

c A i• true hul R is fal•e d. A i• false but R is uue Assertion (A) 1 he C'OI' of an .,,.. conditionin~ plant IS low~r chan that of on iccplru1L. Rc;t.~on (RI; 111e lcnnp~;rnluros required in the JCI! plane are lower lh~n UlQse required for an air-<>onditiomng pl•nt a. Both A nod R -:ore 1rue and R i~ lhe

uonttl explan<~tion Qr A b, BoUt A anti R or.: ltue blli R IS NO'l' a

com...oct oxph1n.1tioo of A c. A i~ ltuc but R is C,,lJe cL A is f>bc l1ul R i~ true Th~ rCllctlon {in kN) nl tl1~ AUpporl • A· Jot the beam 'hown !n tl1<: given figure is

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1Dl1 Jif

.w A a

r-Ot!! t •• Jll .r .. -"i 0. I llt f b l ,H c Ul1' d. !),8 ~ fhe Ioree 111 the mcmbet '11' oJ'the trus'S shown m ilte glvenligure IS

a 16 ~N t~nstle h 16 ~N rompr~~iW c 4 ~N te11sile .!.. 6 kN L~nsll~

34. T11o force> •let at n poniL l'bi: find rorce has Y and )' componen~ o I' 3 N and -5 N respectively The r.:sultnnt of these forces falls on I he x-n.~IS and hAS a mat~notude of. -l N. 11•~ x and y componcms of the s<lcond Ioree os a. 1-7.5) h 1-7. -51 c l-7, 0) d. H 7 0)

3$ A stone is pt'OJectcd upwnrd~ wllh a ccrtmn 1docot)' from the ground. It takes ··1 se.conds to reach the ma:mnum llmgln There Is no a~r resistaoce The tJme taken by the stnne to reach the ground irom It~ rnaAtrnum hct£)11 f~ "- J T b I.S I c. I ::!5 T cl I

36. for u g~wn veloctty of the proj<eule, the rung~ will be the maximum 11 hen the angle or PTilj.ecrioo wrlh the hori:zomal is a n:

b. 7tl4 (" n:/3

d :t/4 37 Con.sider the followmg srruements·

A mon holding the pomt A of the wpe 1\alks l m (see l!gure ~h·en). 1\ssumt~ tltc pulley to he l'ri~uonlc:ss ''"d g IOml~ one cnu say thltt the

-!;;-----{9 . ~ ...

work done b~· the man 15 I!)() J 2 work clone hy the mon i~ 7ell),

3 work done by the roroc or wn.vit) 1s IO()J

-t mcrease m poteol131 energy of the 5 kg mass ts I()() J

Of th~ srntom~nlS a. I Wld 4 nre correct b ~and 4 an: correct c. I. 3 and ~ ore correct d. :land 3 nrc correct

3~ ConSJder the rouowwg statements regarding power: I It is Lhe capacity of a machine " The cfftc•~ocy ·~ ah1uys I~ thlul unit\

as e'~~ry de'' 'sc op crntt:S wtth t~<nne toss of .mcrgy.

3 A dynnmomewr can me.asure the power b)' absorbing it

4 Wnu-hour •s th~ unit of p0\1\lt' Of these srlllemcnts a I , :!. ilnd 3 are correct h 2. 3 1111d -I are correct c. I, l and ~ nrc correct ll. 1. 2 Wld -1 aN corr~ct

39, A man 15 dra1VIr1Jl 1vatcr from o well with the help of a bucket wluch lenk..~ unifonnly, TI1e b11c~ct wcogl)s 200N when full whde IO(l i'.f of w~lel' leaks out by the hmc it orrh-cs ol the top. ~later is uvni.lablc In U1e well at a d"fll.h of 10 m. 1'he work done b)' the man ul dra\\J 11g the wmer Is

~0.

a 1000 J b 1500) c 1000 I ll 3000 1 Which of the following condition; ar~ to he snti~fied by o two-mass system wh1ch is dvnamtCIIII~· equivnlentto a rlgtd body?

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41.

42.

-13.

.u.

Tile tot~l rnA$! •hou!Q be eqWJJ to llwt oflne rigid body.

l. The centre of gm1· ity should <oincide with that of th~ ri~tid hody.

J . The Iota! momenl of inertia ol>Qul -.11

axis through the c~ntriJ or gnrvhy .must ba eqoolto tho I of the rigid body.

Sele<:t the ~om:c1 ~nKWI:r 11$IJ18 the "ode~ given ~~low·

<:odes·

"· I and 2

"· 2 ~nd3

.:. I and 3 (L 1. 2 nnd 3 n,c iJu:rti~ IOI'C<= ;,, a •Y~Ic:m '"directed itt n. t.ero degr<les to U!e o~oeler3tion b. 43 degrecS•ld tho acc.:leo-at.i(lll c.. 90 degre<:s 10 U1c acceletalion u. I ~0 ,logt'<OeS to the a<ll:elenllion Mn!cll tis\ • I' Wilh J.,isl • fl Oltd sclcx1 lite co~ct au~we1· using_ the codc:s g ivl.lu below lhc u.ts: Li<t - 1 A. Pantogmph B. Singl~ slider Cf'llnk cluin C::.. Double slidec crank chain D, Strnfght line motion Lost - n 1. Scat~h yoke mechanism 2. J;louble lever m~honism

3, Tcbcbicheff mechnrusm -l Double cronk mechnm•m j H:md pump C'odes:

A B <: f> • 4 3 S I ~ 2 5 3 ~ 2 'S 3

5 Por spur with genr raril, grearw lh•n nne, tlre int~d"erellce tS mod likely to o~our O.C:ll' the ;L pitch paint

b. point of hcgiun.inl!< of cmUat.t C. J)Olllt OJ ond of COilfliOI

d. r-ool oflh.: tooth fo ,, juut n1l bcaJing p = t~vcr~ge bcar.ing pres•llrc, Z - nbsolme visCfflity of the lubricanl. N rotullonal spc;ed vf' ~re JOum•l.

-13.

·ll).

47.

48.

-l!l.

b elf ll Tite bearing ci~Dracteri!lic number ili si''ell by a. I.Nfp b. p!l.N c. 7JpN

d. 'N/Zp t\ JOUf\1~1 ~earlng cof d~1mcter 2S em und lc;nglh 40 em carriC! ~ toad of 130 kN. TI•e DV~Jrngc bearing prcsf ute IS

n. I. 5 I.::Nfc.m 0

b. 15 kN/ccn~ <:. l 50 lo'-IIcrn~ d. ntme nf U1o uhovc

The momenl of inetfi:tl Qf • tlywheel I!! 2()(10 kg m' !Hartong from res t 11 is moving whb 4 unifom1 ""c.:leratii!n uf (I,S r.uJI•l· After 10 sec:ond• front the >tart. Jts kinetic energy will be

a. 2SONm

b. 5(10 Nm <:. 5.000 Nm d. 25.000 Nm Cort»id•'T ihe fn1to11 ins the <tnlemomL>: The Oywheel in an IC engine J. ACfS il !( :. teti(:IVOir of cmel'g)'

2. mfnimi74 c:r~ti~ fluclulllion~ in 1hc: et~gine <peed

3. tnkes care of lood tluciJJntioos in the c:ngme a.ud cuuli·ol:b ~pto:ed "adalion.

0[ thesil•t•Wmenl< ~. l and 2 ore corre~l b. I ond ~ u<c cmn:cl <:, 2 lllld :! ure. COn'o!CI

d. L 2 and 3 nn: c:orn;cJ In • Spring-controU~:d gqv~1:nuc·, the controlling foroc curve is s tr•jgbtline. 1 h<> balls ure 400 mm ~part when the o:anlrolllng force is 1600 N. and they 11re 240 nun apnrl wh~n lbe force is l!OO N. ro make the gow.mor isochronous , 'l11e initial lenRmn must be increased by

"' 101) N b. ::!00 N c. 401) N c1 8011 N An m-l.ine four-cylmder four-~troke engme Is ballli.ICed m wbicb oftbe tilllowing'l L [>runary fcu-.:es. 2. Prim><') <ouplcs.

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50,

5 1

Sl

3. Secondary forces. 4 Seconclllry co<~li<.S.

Select ll1e cor~t auswer u;;lllg tl1e co(les £lven below· Codes a. I nnd ~ b 2. 3 and 4 c. I and '2 d. 2and~ A vibratory syslt.m• is shown IP the ghen tigure The tlex\lral ri.gidhy Qf the light c-antilever beam ls El The frequency of small ve•1lcaJ vibrations of mass m is

I I

3Elk u. , (3 F'l+kl')m

/kl' ; 31!.1 c

V mP

<1. /kl' -3 K I

v ·"''J

·I J > ~

Po1· the vibJalmy .sy~lem shown 111 the gjvW~ figure th~ natural Frequeucy Qf vibration in r4d/sec is

t...._=-,,u~ lSJ .. ·•u .J.. ~ .)J).,.,,

a. 43.3 b 86.6 c. tOO d 100 Logarithmic droremenr or a damped single degree of freedo.m system is o. It the stifTncss of tb~ spring is doubled ~t~~d the mass is mad~ half, theh 1he IQgarithmie decremen1 of tbe new system will be equal In

53

J ·' a. - v 4

b. 15 l

c. {j

d 26

7 ul l 5

The pri ncip!ll ~tres~es 111 a f':itU iu an elu.stlc material ~re 60N/mm tensile, 20 N/mm' tensile and 50 N/mm' compressive Lfthc material propcrti'cs are: ~· = 0.35 and 6 = I o' N/mm2

, I ben the volumetric strain of the material is a, 9>< 11! •

b. J ' 1(1 '

C, )(15'1( f(l J

d. 21 .w' 54 A tensile bat is stressed to 250 N/mm2

wbicb Is beyood its elastic limit. At dlis stage lhe strain produced ln. the bar is observed to be 0 0014 Lf the modulus of elastidty or the material or the bar is 205000 N/mm~ lhan tbc elastic component of the strain is very close to ... 0.0004 b, 0.0002 c. !WOOl d. 0.00005

55 A weight talls on a plunger fitted In a container filled with oil thereby producing a pressure of 1.5 Nlmm2 in the oil. The Bul~ Modulu$ of oil is 2800N/mml, Given thi s siwation, the volumetric compressive straco. produced in d1e oil wUL be a. 400 • w•· b 800 10''' c. :268 JO"' d . s3s . to.,

56. 1'he Young's modulus of elasticity t1f a . material is 2.5 times its modulus of rigidity The ·poisson· s rat.io for 1J1e tnaterial will be -a. 0.!5 b. 0.33 ~. 0,50 d. U.75

57 Which one of the given bendin!l mom<.>nr diagrams correctly reprcseuts tbat of tltc loaded beatit ~huwn in Fig?

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5R

59

c r Jl

A).. • Q - ..... ~ " L'> ta }I .

IOl /~

A OOUll carryong u un1lbnnly distribuw.d load rests on two $uppom ' b' apart \lltll

equal overhang$ 'a' nt ~ach eml. 111e rutfo bin fnr 7.cro bendmg moment at mld·SJl'Jll I~

a, ~ b c:, 3(1

J 2 Jlor a SlmJ)I\' supponed beam or length ·r. SUbJeCted 10 downward load of un1lbrm III!Cill>1IV w. matcll Ltst-1 wuh f.IS!·rl and select the corr~..:l answer usmg the codes giVCII hcluw the Lists .List-1 II Slope of-shetlr force dingrnm B Max1mum sheur tbrce C' Ma.~imum clenection P Magmludc of lnaXImUm bcndm!!

mom em I "1 II

b\.1.

I'll

1 S.ol' 3M~ il

2. w

3 ul' 5

~ "' ~ Codes:

J\

a. I

b. 3 c 3

B 2

2

c 3 ~

D 4 4 ~

d. 2 ~ J The shenr rorcc diagram ol' a loaded beam 1S shown in lh~ 1011<111 Ill!! figure

"~

1 !.1 ~~

Th~ maximum Bending Mom~nt or tlw hc:um b a. 161\N- m b. II kN-tn c. 28 kN-m d 8~N-In

A steel shut't of outsido d~amctur HlO nun IS solid over one hal r 1.1f IL~ length 11nd hollow over the oth<tr half Inside dtanlct~r of hollow ponion ts SO mm. The shnf\ is h<dd ngidJy ut l\\O ~nd.~ nnd u pullo) 1~ m•lllllted at its m1d:.<!ell<m 1,e., ut the junl1ion.ol' soltd and hollow portions The ~hal) Is twi$ted b) upplyins torque on the pull ") If tl1e torque oamed by 01e solid pM1on or tb~ shan i:> lliOOOkg-m th~ the 10rq11c carried by lhc hollow po11100 of the shnf\ \l'iil bo n. 16000kg-iu b 15000 kg-m c. 14()()()Lg-m

d t!Otltlkg-m /1 dosed cuu hcl ie-Jl spdng IS cut 111 two equal parts along us length. Shl'fucss of the two spring~ •l'l obwinc-d will he a. (u) lloublcofthatot'thcongmal >-pnng b tb) SUIT\e us thnl of the <>ngmal sprtng

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94.

c. (c) h~lf oflltM ofllae on gina I spring d. (d) one-fourth of tool of the originnl

S(lfing Match La•l·l ll:!nd conditions of long columns) wiUa LJSL -U (CtiUcal load) and scJed lbo COrNel answer usmg the codet given helow the Listsc Usa-1 A. Buill-in ol one end and pinned ogninst

lateral deflection al ine oilier ~d B •. Both ends buill-an r Both tnll~ t1i1111•d IJ. One end buill-in nud tb~ other end free List n

K'h.l I. L'

'21rE/ 2. /..'

-t;rEl 3. J.•

C"odes:

a_

h. c:. d

A

I 1 '2

B

2 I . ·'

I> 2 3

4 4

11\e volumctrk. slmin tn case ur cylindric.~ I ~hell of dinmt:tcr 'd' und lhkk.rJcss ·a· ~uhjccled to ianem:al pN!•ure h•villl! cvefticient <•f elostic]ty 'li' nnd Poi•so)l mlial ')J.' is equnl to

'L pd 2rE

" - pd(.'!-,LI) l"'

c. pt/ (4 - 311) 3/Tl

tl. pJ (5 ~p) 4rE

Lender'~ lines on <toe) .Sp"'-'uncn under simple ten~ ion test i;a n ditcct lmli.:.•tion of yielding of mlltalnl due to slip nh>ns the­l•lnne a. of ru1aximum pnndpoJ stre.s• b of maximum sb.,,r stress .:. ofll\ading

M.

67.

70 .

')of ll d. perpendieulM to tho; direction of

iNdlng Consider the following mnchinang w ndiliou;: l. Duetile mnlca·itll. 2. I righ eunlnll•t>ccd. 3. Sntllllrnke ~ngll!. .J. Sma ll uncut ehip Utlcknt:ss. C()ntinuou.~ chip~ ~ iUtoul buill-up oJge wquld be li11:ancd under llae nuac.laining C()ndition3 liAted ul a, I , 2 and 4 b. 1. 2 anJ:l c. 43 :anrl4 d I, :; and .J

In the rovlor's tool hie equation. Vl'" =C. lhc. nlue nf n - 0.5. The wn l has a lifo a)f 180 minutes "' a culling spoctl of 1 Smtrttin, If the tool life i~ n:ducc:d 111 4.5 mlnllles. then ll1e cutting Kpt:ed will he a. 9 m'mili b. IN m min c. 36 mtmirt d. T.!m lmin l'n ruming, lhe rolio of llleopllmum cutting speed few ntinmaum wsl and optlm u:m culling • peed for WILXllllWII rnlo nf productiPn is alwoy~ a. equ;alto 1 b. in the r~nge rof 0,6 lu I c:. in the r•nge of o. r to 0,(1 d. greater than 1 Whkh 11f the l'olluwin11 pr(lc~~"" c:Jn be used for pa'Oducing lltiu, laanl, weal resistruat e.oating sucltol TiN. u!lHSS7 1. Physieal vapour deposlliotL 2. Sinter ina under redueing utmOSjlborc. 3. Cllcmioal V3pOlll' deposition with llO$l

t.realment.

4. l'b smo spraying.

Select alab =• •n~wer u~ing the "''""" given l>elaJw· Codes: a. land 3 b. lond 3

"· 2 and 4 d. J and 4 M•lch r.isl l lmt:eh~nism) with l,i.st-11 {1\.lsoeiuwd function) and ~elect Uae

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71

correct answer 01!ng !he codes given below the L.i•L~: l..ist-1 A. Geneva gearmg B. R.1tchct and P:twl C. Whit wor1l1 D. Rocbnd plnitm t.ist-11 I .P~ motion in sbaper 2. Feed motion. in drllltng rnochotc J . Lnde>clng llt'llJn'cl ~ . Vnicl; rotum niQtion in 5hnper ("()dl:l;;

A B c D tl. 3 1 2 4 IJ. 3 2 -1. .:. L 3 .j 2 li. 3 ~ 2 ;\ sllln.ct.Jnl gear lt•~ •n vuL•idc dill.!ltetor of %rum und module 3 mm. iln• number of teeth on the gear is a. 32 h. 3tl c. 16 d. 15

72.. tvfutch LL<t-1 (Metnl forlnin.g proces•) with Li•t-11 (Aswciatl:d feature:) und sth:el the: ~ltrot;t fiiiSWtl' USing U1e OIJ~CS 8 iVen

below tho Li•b : List I

A B l•nking B. Flo\\ forming C. Rhll rorntins D. EmbD!Ising LiM·ll 1. Shear ongle

2. Coi.led s tock 3, Mandrel 4. Closalmntchiog die;o Codes:

;\ B c n. I 3 4 b. 3 4

.:. I 3 2 d. ~ 1 2

D 2 2

4 ~

73. \\')lich <me of the follnwin.g lllclnr> promotes the lc:lldCI.ICJ for wrinkli.ug in Ute prl)l;CSS of drawing?

I IJ ctl ll a. lncre•!c in the r>iio of thi~lmc$$ to

hl~nk dillmottr f wor~ mnLcrinl b. Decrea~e in the ratin of thickness to

blAnk di4melcr of work materinl c:. D~cr.,.ase m th..- holding force on the

blJlnl;

d. l1$e of ~otid lubric..u'" 14. 1-.l:llcli LU.t-J (Item to be produced) with

Li•t-U (.Proc"'-'s to be used) ana select· thct correct •nswer uo;fng lh~ ~:~~d.,.; given b~low lh~ Lists: L i>t-1 (\.. Rnil110)' "ngQn \\heel~ B. Ruador Juol rc.b C. Gear blnnks D. D1ib"1l ends of pressure VC$selll Li.<l-ll I. Hytlrostotie cxu us lou 2.. Mueltine forging 3. Rolling 4. Hot•pinning Codu•.

_\ B

•• 2 l b. 3 ]

c. 4 3 d. 3 4

c 3 2

L

2

D -1 -1

2 1

75. E.xtrusinn lbrco DUES NUT dqxmd u1l0n tl1e a. exlrusfon ratio b. rype or extru.<ion proces.~ c. material of the die d, workinS ternpcrature

16. Whicl• of the rollnwing procel'ses can be. Used ror mUSS prrKiuctjc)n n( J1)3Stiu containers (With licl) of5 liter oapocity1 l. lnj~tion mouldinB 2. Jolt rnouldins 3. 131ow owulding Sci~>Ct Ulu enrrect :mswer usirut the ~odes gf..·en below: -Codes:

a. I 411\1 2 b. 2 and .1 c, land 3 d. 42 and 3 Whioh or the fo llowing 1'"'"' •rv comctly matched? I Drill pR:li$ : l'repanolng

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2. renw (¢111; grindini! : Thl'ough feeding 3. Capstan lathe : Ruin type tun"! Selecl the COlT~! ;m~\Vtl' OSin.g the C:<)<le' grven below· Codes: 01. I ond 2 b. I . 2 ;onl) 3 c. I IUld :> d. 2 •nd ;l

7ll. 11t"''! ~' S hvu~ duty 011~ n jnh shv~ld lijkc: ~0 mi•tulc~ 1.o ~omple!e il. Uul a.nc-r 8 hou.o-s :m open~! or is ~ble to complete Quly 14 &uch johs. 'The oper;otor's perfonnancc IS

tL 17~CI,n

b. 7~.5~.

c. ~7.5"· lL 97.5~ ..

79. Wbicb of lhe following .:ao be con~ldored to be tho>advnnlagcs ofproduct !Jyoul'l I. Rcdu~cd tllattll'ju I lt~odling.

2. Gn:•tt:r nc..~ibility. 3. Lo1~cr CDpil.'ll inveslrucnl 4 . Bcu:ct utilization of men ontl mndtiuc.~.

Seloct lhc cotrc\!t •n•wor using the code& given below: ('odes: n. I ttnd 3 b. 2nnd 3

c. I nnd 4 d. 2 and ~

80 Activities invo lved in producliOfl planning and conu·ol ~y~tlml are li•t~d he I OWl I. Pl•nning. l . lft>alling. • Sche<lu ling. 4. Di"P"tching. 5. Routing. (1. Follow up, f1le COlTCCl sequence of the"( a"ttl'itt"'' in

ptoduction plaou[ng oud cvnltol :rystctn is ,., 1. 3. s. "· 2. 6 b. L5. 3. -1.2 6 c. I. s. 3. 2 4, 6

<L 1 . 3. 5. 2. 4. 6 8L El~eVolQr:s nrc us<!<! for moving Jrutt~T.iol!

a. along fi.'<cd and horizon to! p:olhs b. in • vertical din:etiou olong • rro:d

paOt

11 ol l l c. oloog p )tnrizontol paUtlO any lliswncc d. in hoth the plnnes

82 Therl>ligs ore es.ential in a. flow procells ~hart b. motion economy c, method-•n(•lysi• chnrt d. •uggcotio-n sy~tcltl

~3. Con.<idcr tHe litllowing prindph:!lc

84.

I Trying tu nvoid the use (If hand• for holding.

2 Relicvin.!! tb~ h:mds of \V<Jr~ •l•hencv.:r po!<.• iblc

3. Kocping tl•e w01'k ln. Uuo uutrua l wo~k.

4. Avoiding having both baud> doing ll1e ~orne thing nl the same rime.

Principl~ of motion eC(Inomy wqul(l inclullo a. 42and 3 b. 2. 3 llltd 4 "· I. 3 and 4 d. 4 2 and~ CQMider rhe follo\\ing dt•rll>: 1. Mnn-tuacbinc cluu·L

2. SI.MO dlllrt. 3. Load cb~n. Those used ~~ nl~bod stuuy would indnuo a. 1,2and 3 b. land 2 c. 2ond 3 d.. I >nu3

85. lloc li.~cd co~lil liir a yc., is R~. K lakJo~. v:ori•blc .:o•t I'"'' unir i• fu. ~0/. •ntl the selling price ••f e:och unit is R~. '21)()1-. If Uoc •nnual el!lrmuttd ~31ts Is Kl;. :lO.OO.OOO/·. then ~oe break-evot\ vu]umc i• u. 2000 b. 301)(\

~ 3333 d. 5000

86. Mnldo List·! (Type of loyow of fo"itittt,~) with L~>t-Il (Applicotion) nod £elecT the Com:Ct an>Wcr U.<{(lg tn" COde$ gove11 below lhc I.ist~: L.isl·l A. I' low-lin~> t.yout

B. J>r(lc~ Ia ' ''Jut C. Fi~ctl pu~1tion layl)ut D, llybrid Ia )'OUt

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t..ist-n I. Flnmmablc. explosiYe products 2 />nlumohilo• 3. 1\ctO pl~ne~<

~ - Jol! shap production ('ode,.;

\ B c D

•• 4 1 ) 2 b. 1 3 4 I ~- 2 4 ,

" I

d. 2 ' "' 4 87 ['he disp:ot<ihing !unction referx In

n. di•r•teb of lio1i•hed good• on order h. movement of in·pra<:ess matorial !rom

shnp to shop ~;, di~p>tcb 11l1 bills >nd invoice to lho

custntnt.r o1 Bulhorizlng, • production 11 ooit order to

be launched .88. fn an ~diabntio process. SOOOJ of worJ, i•

pert'ormed on • !I)'S tan. 'l'he •y•te1n retllm> to its al'iginal ot.1t~ wltik t0003 of h~t ore oddoo. The work dun~ durinJ!. tl1e non­odillbntic process il;

"· • 4000J b. - 40001 c. • (>()()0 J d. 6011() 1

a9. If IJ>dV >nd -fVdp for " thermodynamic system of"" ideo! gns on """luntion give lhtt ~:on•e IJWintiLy (JIOSit ivc:incgutivcl durina • pr'(Ness. Ut.m u.c 11ro~""~ llndcrgon~ by the S)-stem is n. t•enthnlpoo b i•mtrnpl~

c. h<>barie d, isothermal

?0 lllnt~h l.i~t-1 with Li~I·TI :onol ~ele~t the corree1 amwcr u.~ ing the C(ld¢!; given be10I\ tl1eJ-i6~:

Li•t·l A. U>nllt.'llltvolumt process B. Con~tnnL p!C$!oW'e 1•rll'!dS C. Coosl•nt tc:mp•TltLUrc process D. Con• taut entropy prootss Liotll

<fP P I. - ; til' , .

., I.

92.

93.

12nlll .., dP ri' - - .::::--

dl' rr

3 <IT .,. - =--tli c: dT T 4. - =-d!i c,

Codes, ;\ B C D

u. 3 2 I 4 b. '2 4 J 1 <:, 3 4 L 2 d. j 3 4 2 It i$ prv1X>sed to build n rcfcigeratiuo plonl 1\>r • culd ~tougc b> be m>intoined at -3"C. •n.e "'"bj1:11t temperature·~ 27"C, lf s~ ttf J<J~1 of "llr;rgy L~ to l)c C{IOtUJU<Ill$fy o·enwved from the cold stoo·age. tbc MJNThtn l>f power required to mn the rd"rigemtor will be 11. I<~,~ k\V b 75.3 k\V c. I 54.~ It\\' d. 2543 k\V

When •ir Is QOmpresse<~ the enthnlpy t5 ln~re3soo fron1 1()0 to lOO U/!:g, l:le.~ll~sl during tl1Js con.prllSSion t.. 50 k.J/kg. Neglecting ~;netic and fK>Imlinl energies. the power required for ;) mass now or 2 kg~s of oir through Lbe compressor will be • . 300 k.\Y

h. 200k\Y c. tOO kW d. :SOkW

A gas ehombc:t is Ui1 ided into 11111 fl/11'1! by mClln• of n partition wllil On one s idu, nitrogen gn.• nt '2 bar pre!>Sure nnd 20•r is flMent. ()~ the ~th<:r side, nil.r\'IJ!t!O giiS al 3.5 bat' J) l't$5ure and 3S"C i.4 p,-e,<tt~ TI1c chomher is tigid •nd thCl'mnll~ i~ulnted 1\-om the surrounding~. No if the Jl'lrtiiion Is ranovccl a. hlj:h pressure niu·o::"'-• will eet

throttled

b. n~cchalli~l w~rk. wW be! donu ul lbc ""pen~o of intcmnl mcrgy

c. work will be. done on low press~re nltt11gen

d. Internal energy of rutrogen will be cons.ervod

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94

95

For tl rovcrstble po"cr cycle. the opcr.uin~ tCOif"'mture limits are 800 K and 300 1\ ll takes 400~J Qfheat. fh.:: una\ ailutlle \\llrk will be. II, 250kJ b 150 kJ ~ llO kJ

d. 1110 kJ l n Van dcr W~u~f's gas t.oquat1on.

( 1'~.!!..)11•- I>) ~R/' (R = universal gUll I·'

constum) Lhe un it ofb 1s· .., thre/mole •c b m1/mole c. kg-liter/mole d d1mens•onless

% i\)1 1d®l uyclc rs shown 111 the given pl\lSSurc-volunu.: dragram ,

• J

[_=j !'he 'Silmc cycle on ll:mf"'t'DIUrc-cntrOp)

diagum will be r<:prescnt~-d llS

'] ,.

,,

,,,,

T

1•1 ·d. ' '------·

(d) :d L __ _ II P:lhgcmting muchtnc w(trkmg on rovcr!led Camel cyde conswnes 6 k W to

13 ol 1.5 produt'C u ret1'1gerntmg efi1:ct oi 1000 kJfmin for maintuming a region at -40"C 11tr ~aglwr remperoture lin degre~~ ccntigradolllflh<: cycle wall be

a 31H8 b. 43.88 c 23 d. LtW

98. W1nch une or the f6Dowmg prur of 1lir ~lnndord cycles has ~1e same effi('ten<::y us lhnt or Cnmot cyck when opcnmng bctw~cn the same maxamum \SOIIfCC/ and m1n11T1um (smk) temperurm·es mgelher wnh 1deal regenem11on'l a Otto and Brayton b Brll\ ton and Encssoh c Er1csson and Smlmg d Stirhng nnd Ono

99 Wh1ch o11c of the lolloll•ng otlllhlnn:.J i><!ts pf addhtons bl s1mple gas turbine cyde will tmve NO e11ect on the power ovtpul or the c) cle'l a. Regcncrntmn b lnten::ooling .md rcgencratHln c. Reheatml?, and mteruoohnp, d. Rebcaung. Jmcreooltog Wld

regeneration 10(1 Thr curve labelled 1-2 1111ht' g1ven figure

rofen; to the expan~HJn pru<!e.'ls tll'a

• a Rnnkane cycle b modtiJed Rank me cycle c r.-gcn•rolll'e cycle d reheat C} clc

I (II In an tdcal vapt>ur compr--ss1011 refngcruhon cycle, the enthalpy of the refrigerant before and nfter !he evaporator tS resptttivdy 75 kJ/kg and 180 kJ/kg The circulation rate or the relhgcrJm lor each of relrigem11011 1S a I f<&lmin h 2 k\?"min c 3 kg /mm

d 4kg/mm

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l 02 Au eogme worllng un DluscJ cycle ts ha'''"ll an rdeal eflie1enoy of 60'' • lllld a relative cmcicnty of 50'li The engm~ consumes 0 5 kgls of 011 hAVIng a calorific "fflue of 40,000~J/IIg_ Tho pol\ler produced bY che cnglnei~ a 24 MW

b ISMW c. l:lMW d. 1\ MW

I 03 Cuusrdr:r the tbllowll1g s tages: f Super beater

105

.., &l!lnomf1.tr

.j Fleccroslallc precrpltntor -l- Air pre-hew.cr The eorrm sequence of che Stages chrough which gases now ifom the llorl~r to the chinmey Is. lL ~ LJ. 4 b 1, :!,3, 4

c.:!. 1 . ~. 3 d. 1 2. ~. 3 Whrch one of che rollowmg Cuels rs u!'ed 10

d~lennrnc cb~ wurer ~>quJvalerlt of a bomb oalorrcneter'l a Benzoic aritl b. o~1anl! c. Coh d. Cecane Glvtn chnc •u· I$ the blade velocicy. V is the absohrce velocrty of sceam and v, rs rhe relative velocity, subscripiS I nnd 1 refer to the 1nlet and e:clt (If !he ro1or. the wloai1y tm1ngle for un IIJ<tUI no" sceam turbrQc shown rn the \:IVCil liJ;ur,._ rcfe111 to whrcb one or tbe followrng. types or turbine stagus?

l .......... v. ...

v ••

a. :Pure nnpulse b. f'urc reacrlon c soq. ft'llctfon C1 25• o reatlltl.ll

•

I 06 DutTn!l. un ~xpansion process, swnm posses thmUgll mel ~lllble condrUQn~

{supersalurnted tlow) Which of' che

14 Hf 15 foiiO\\Uig IIOuld DECREASE US a resu lt o( lhe efl'ern of super .smurnuon'' L J!nthlllpy Utop ! Sped11c volume m elfll

J f rnal ~I')· ness rracwm 4 Entropy

elecl lhe correct answer usmg lhe ced.:s given below Codes: a. 1 undl b lund J c. land ~

d 1 and 4 1()7. Cons1der tbl! followmg Statements.

to nn rmpul,;c 1utbme,

I the relnnve velocity of stenm at mlet 1111d autl~l of movin!l,blud"-\ urcequ:il

2. th~ miiVlll!l bladelt are 5ymmetrk'al 3 the oull<r urcn of the movmg hludos '-"

smaller thou the rnlet ruca. Of lb~~Sc ~ull~rncnts. a. 1.1 and 3 are correct b. 1 ruJd 3 are correct c I and 1 ore correct d I anti 3 are correc1

I (lR. 1\t the in lei of a steam nozzle, slqgnation enlltalpy of sccnm 1s 787 .JU k:callkg at <!Xll,

1hc stanc enthalpy of ~team 1s 738.00 kcalnq;. J<c>r n fri~uonl= adrobru.re Oow. the velocuy of ~1eam lit the ~xu wrll be Jns~umc I kcnl4 18 kJ} a. 582.lliJ(S

b 6006 m ~ c. 620 m,s tL 6405 m,s

ICJ'I In nn axial tlow ~eam curbme. th~ Pllth tr"Je~d by u lluid panlc.le m lit~ dc:siJ!,n pmnt1s "-n" helix ufconstunl mdrus b helix of varying r;1di~~ c. ~ycloiJal path d 1ormdol pnth

I J 0_ lo the case uf uozzle guv~med srewn turbines, sll)l\C eftieicncies very hltlc when compurtd with those wrth full 51ellln no" becaw;e 11. m~~>.• now rm~ J ocs not n!Tect th~ !otllg~

~mckncy

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b inlet steam pressure in th~ f~t mge ls mltaffecte.l

• · Olii3S rnt• of flow of ste.1m in all tho: S-lD.&es is tlu: samu

d. stage pressures arc not much different Irom the design va luo

Ill. ·n,o m•~uuum bl~dc cfl:icit11oy of s ingle $tage impul!,c turlline in term; of nl)nl~ angl~ .L under ideal cflndit l<•n~ i• proportion•! to a. 1.!0!1 a: b. nm a c: sin\.t u. ""'~ u.

I 12. A po'"" plaolcolllSUJILC• coal nt theJ'liLO of 80kgls lmc tho> combU5Lion air required i~ I I ks• kg of coal Wh~t will be tl•e power of Uuo F. D. Ian surplying the rut. if il! officioncy ls 80~~ ood it d~"\ olop5 a l"""" ur" of 1.2 m of water'/ (Assume dens 1ty uf "ir w he I .21{gtm' ) 3. tll.97 MW h. 9.87 MW c. 9,2 1 MW ,1 $. 78 1\'fW

I I ~. An import•nt rmmotcr to be moniliJrcd ~octl:irurousl)' for ~a fegllard)ng turbine rot(ff in • steam power t•Joot i~ a~ 5team inJet prcssllrQ'

b. stennt in let lcmp-..-rnturc: c, •hall \~brntion )ovcl d. beouin_g tumper::~lu«:~s.

114 /1. centrifugal pump having on impell~ of I 0 em dillmetor discllarg"" 40 litre ~econd 1\ hen fUnning t l I tlOO rpm. l'h~ w"""'pond!Jtg •pced of ~ gcnm~lric:LU) &imllar pump havin~ :an impeHer of 40 ~n diometer .md V.ll m Is disclutrge wilt be n. 276.·h'pm h. 298.3 rpm c. 3 li.Srpm d 358.2rpm

liS. In lhe c:L~e of frnncis lnrbine-, velocity

rnlio ;, defined -* wllcN 1'1 ;, Uu! -v2gR

~'·~ll~ble l teod ~nd V 1 is the ~. absolute VdhlCity at the drnt) tulle ~nlet

h. meun veloclty of !low m tl•c turbine c. Absalute 1<:lvcit~• 31 the guide van<;

inlet d. flpw w looity .t the .rolm iul~t

IS of U 116 £'or ~ 1: m scale model of ~ hydnlulie

llarltfn~. the ~peeil1e s-pa::<l uf the mod.el N..., ~~ related LO the pl'ulill) pc St~ili" speed N"' as a. N.,, N..,lnL b. 1>1"" mN,p "· N - (N 1""' .. 1 .0, - "'t

d. N.,, N,.. tl7. Considor thciollo" iog stotemonis:.

'lltc overall ducicuc) nf u steam power pl>nt c:.n he i;.creased })y

I lo•= slng th" •team temperol.urc 2. lncreo.."'ng the conden;;er pressure. 3. lmprovin~tu.i:>inc hlado cooling. 4, Providing :~ir presenter< Ot' these silltemenls a. t, 2 and 3 ore CCIIT«t

b. 2 ond 3 "'"' crorrcoL c, I and 4 ""'correct d. 2 and 4 ore e<~rred

118. In "' hydruelcc1rie fMlwcr plunL l'ut'C ba) .,r ers to tiLe a. I>L'ginning of lh.e op<ro channel ol tit~

dnm b. end of pen¥tock ot Ute valve house c. level where ,penstock begins d. I all race level at the 1ur1Jine e.xit

I 19. Which on~ of the {i)tlowmg pm~ i$ NO'I' C(Jfftctly nmlchcd?

~1utcriul Functio_tt ill u nucltur r e3rro r

11, Gr•phit~r • Mll<lcl'ator b. Lcud ~oflectllr

e. lfntnium·2.'S · fuel d. Con~~t:te . !3iologtc.~l $ltitld

120. Coru>ltlcr Ute l'otlo\\ing way~ ofdispus• l of n udeAr 1\ ru;tcs: 1. Tlll'nwmg tbetn in the dt:<.1' sc>. 2. f.oavin~; lhc:111 .in remote, 3ot.tcd Ofl""

'~paces ln barren monnt:tinous regions. ,,, St:aling lh<lm in i:Qncrete cmd

Jcpusiling tJu:m in ~n:Vil:es and C-!\VCinfS ~~~ {be cJoc.-p I\C.3~

4 . Storing them ill sc!nled couorut.c cooiPiners in di;!u~ed d~p mine !h•fl•

Safe w•y• of dispo.~:il of nuclcor wo•t~ Wn\lld include ;,, I, 2. 3 and 4 b i. 3 •nd J c. I aod 2 d. 3 anli4

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