www.exam

race.c

om

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 ｣ ｾ ｴｳ･＠ of nn irlcnl refrigeration cycle and sek.a tJ1e correct unSII'Cr using 1hc ｣ｶ､ｾ＠ given belo11 ｴｨｾ＠Usts: Li$t- I A. Wurk input B. Heal rejection C. ｊＮ＾ｸｰ｡ｮｾｩｯｮ＠

D" Heat absorption LiS1 · II I , ｃｯ ｮｾｴｵｮｬ＠ pn!SSUI\!

tcmpcruturc 2. Isentropic ｣ｯｭｰｲ･ｳｾｩｯｵ＠

Ul higher

ｾ Ｎ＠ 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 ｍｬｾｬＩ＠ compressor ｉｾ＠ usetl " hen a n:li'igcrnling ｾＩ＠ 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 ｰｲ･ ＾［Ｌ ｵ ｲ ｾ＠

difference For the same condenser ｾｭ､＠ 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 tnnfn-tarncd ut 25•c thc.n I he proc<:Ss wnultl be ll sensible cooli ng 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. ｳ･ｮｾ ｩ｢ｬ｣＠ henting b. humidil1rut.i<>n

www.examrace.com

www.exam

race.c

om

1.

8.

9,

IJ.

12,

ｾ Ｍ lteoling and ｨｬｬｩｮｩ､ｩｬｩｾｕ＾ｉ ｩｯｮ＠

d, healing nnd dehnmidilication ln r<)Ol,n air..:onditioning for comlo>rt. the ｾｵｰｰｬｹ＠ oir in summer shOuld be at ｾ Ｍ the ｾ ｮｭ ･＠ ｴ｣ｴｮｰ･ｲｾｴｵｴ･＠ ns thnt or tht"

ruutn b. 5 to 10•c ｢ｾｬｯｷ＠ the room Lcmperoturu c. 2 tn J"C above th<> room tcmiJcrallln> d. 111 o•c ill Ute ＢＢＢＢＧｯｦｾ＠ ｾｯｯｬｩｮｧ＠ 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 wi tb 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 ｰｲｯ｣･Ｎ［ ｾ＠ 5 k.Itmin heat L• c:xncttd from u rnQm. If thot ｾ･ｮｳｩ｢ ｬ ｣＠ 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'l uids that requlre a gradunlly ｭ ｣ｲ･［ｾ＾ｩｮｧ＠

ｾ ｨ･｡ｲ＠ srress to m::unt:tin :a cc)nstant "1r:iin rat.e are known n,<

•· t'boopeetk fluids b. ｬｬｴｩｴ｣ｾｯｬｭｰｩ｣＠ llu ids 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 ｴｯ ｮｮ ･ｾ＠ floatmg rn wnt.,r, ·n,;. ｭ｡ｫ･ｳｾ＠ 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 ｾ ｵｲｦｯ｣･ Ｎ＠ of n conlaln\!1' of ｭＮＺｲｾ Ｇ＠ ofrololn•c dc:Mity 13.6 is 1L L648

t>. 0.607 c. 0.393

d. 0.352

2ol IS 13. Conoidet the tbllowing ｾｌ ｯｴ･ｭ｣ｵｴ ｾ＠

ｴ･ｧ｡ｲ､ｬｮｾ＠ stability of floating bodies: I. If oscill ation is ｾ ｭｯｬｾ＠ the position of

ｭ｣ｴ｡｣･ｮｵ ｾ＠ of • Oonting body will not ｬｩｾ｡Ｚ＠ wh•lcVL-1' be Lbe ｊｌｾ＠ nf roU>tion.

1. For- a llonting vessel conl.:linin g Hquld CDr1!D· the alability IS reduced due to movement• of ｣･ｾｴｴ･ｲ＠ ol' gravity and t.'llntr.: o [ ｢ｵｯｾ ﾷ ｡ｮ｣ｹ Ｎ＠

ｾＭ ln \lorsltjp> nnd r•cing bOD!.$. U1o ｮｴｕｬｾ＼＾ｮｴｲｩ ｣＠ height will h••'C! l(l be ｾ ｭｮｬｬｴ ｬＩｬ･､ｵ｣･ｲｯ ｬｬｩｮ ｧ Ｎ＠

I )ftbese stolemenL• a, I , 2 and 3 .ue ｣ ｯｊｔ･ｃｾｴ＠

h. I and l ｾｲ･＠ ClllTect c. 2 alone is correct

d. :t "2 1one t; eorrec t

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 ｩｮ ｾｾ｡ ｴｩｯｵｮｬ＠

2. Equation of eontint1ity .should be S.1tlsfied.

-'· The lluid •bould be incom1orc-.ibl!>. 4. l!quatiou of ｣ｯｮｾｩｮ ｵ ｩ ｴ ｹ＠ and ruomcullun

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

t"'otles: a. J,2.,and4 b. ｬ Ｌ ｾ｡ ｮ､ ＭＱ＠

ｾＺＮ＠ 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 ｩｾ＠ 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 '<.

ｔｨｾ＠ los.• ur hend m a pip" orcertnin hmgth currying • ｲＮｾｴ＼＾＠ or flow ｾｲ＠ 0 is 11lund to ｢ｾ＠li . If • [>ip .. of twice ｵＮ ｾ＠ diamutcr but of the 8Dme length is lco ｣ｾｲｲｙ＠ 4 tlow rate of 20. then ｾ ﾷ］＠ ｨ･ｴｾ､＠ IO'>S will b= a. H h. R'2 c. H 4

www.examrace.com

www.exam

race.c

om18.

19

20

d, H/8 An itislrument 11hicl1 offers no ob=itruotiott ｾｾ＠ thl.' now oOi:tii no nddhloual h'tls and is " 1itublc lor h''" rate ｭ･ｷ［ｵｲ･ｭ･ｮｌｾ＠ 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 ｳ ｴ ｡ ｴ ｣ｭ｣ｮｬｾ＠

c(lmpllfing ＱＱＱｲＱｊ｜ｉ ｉ ｾｮ Ｑ＠ bothl<!Jtry ｬ ｵｹｾＭｲ＠ 1111h lammur l>oundnry fa) cr. 1 htrhulem boundnry luyers ure lluckur

than lumwar brlundlll) luyers. 2 Velocity in turhulcnt bl!undnl) ｬ ｵｹｾｲｳ＠

in more uni f<!nn 3 In ｾ＠ of a lnminnr boundHr) ｬ｡ｹｾＧＡＧ Ｎ＠

the thickness of the boundary layer tncreases more mpldly liS the ｕｬｓｬ ｲｵ ｊ｣ｾ＠

from lite k'l)(!i ng. 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 ｳｴ｡ｴ｣ｭｾＡｬ｢＠11. i . 2. 3 aod 4 11rc ｯｯｲｾ｣ｴ＠

I• 1 und 3 t\re correct .:. 3 und ｾ＠ are o.'rrect d. I and 2 are correct A bull u; thrown vt"rticntly upwards lo mr 1•hich ｯｦｬｾｲｳ＠ resistance to motion. Tite ball taken t 1 secon<k while going up and b >cctmd.• Ｑｾｨｬｬ｣＠ Cdmtng il <l'\1 n Assertion (A): tl 1s more 1hnn t1 !lenwn ( Rl inc total qwrgy ol' Ute hall contUtually ､｣ｾｲ｣｡ｳ｣ｳ＠lienee uveroj!c Sf"'OO of the ball ｗｨｬｬｾ＠

coming ti0\111 is ｬ･ｳＮ ｾ＠ 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 ｾｮ､＠ R are true btll R IS NOT II

correct explanallon or A "· A is true but R is f.1lst-cL A is ｬｬ｜ｊｾ･＠ but R is ｴｲ ｵ ｾ＠

lori S 21 ａｳｳｾｲｴｩｯｮ＠ (/\); 1\h inversion is obtUIIIO(l b)

Filing in turn difli:reot lmks In u ｫｩｮ･ｭ｡ｴｩｾｳ＠ 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 ｴ ｮｴｾ＠ but R Ｑｾ＠ NOr o

C<.)rr.:cl t''J'IIamtlion of A c. A ,, t= b•u R ｩｾ＠ ｴｩｬ ｬ ｾ＠

d. II IS tld:;c but R IS true ll . Assertion (A l: Gc.on; 11 fth tnV<lll llcS tuoll \

profik transmit ｾｯｮＮｾ ｬ ｡ ｮ ｴ＠ vdcx!it) ratios ｢･ ｬ ＾ｬｾｮ＠ shal\s ｃｴｬ ｮ ｮｾ｣ ｬ ･ Ｈｊ＠ h) them. R.casnn (R) For uwt)lUICS geot!<, the C\llllnll• ll 11l!riiiOI Ill j]lt: ll''illl (If ｌ｜ＱＱ Ｑ ｬｾｃ ｉ＠

\1<itWecll fltl ii :S Of ｴ･ｾＺｴ ｨ＠ ｬｬ ｬ｜ ＱＳＩＧ ｾ＠ 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 ｾ ｊ･＠ 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 ｾｵ ｴ＠

ofl'ra prevent ovcrheuung,. a. Both A nnd R are 1n1e nod H is ｴｨｾ＠

correct csplanat1011 of A b Ooih 1\ ＱＱ ＱＱｾ＠ R arc true but R IS NO I' II

com:ct ｣ｾｰｨｴｮｮｴｩ ｴ ｮ＠ of A ｾＮ＠ A i$ ｬ ｲｾ･＠ 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 ｵｧｵｾ Ｎ＠

A f· --· .( ｴ Ｍ ｾｾ Ｎ Ｇｍｦｴ ｩ＠ . oo::.N n

. • --t

ｲ｜ｾｓｬＺｲｴｩｬｭ＠ ( 1\ ); ntc tnugmtutfl: Vf ｉｊｉｾ＠

twisting lll()lllCJil lO 11hlcb the ｮｾｮｬ ｯｮ＠ fiC - .\Ia rs ^ ｵ ｢ｪ･｣ ｲ ｾｾ＠ iS -·-

u+b

www.examrace.com

www.exam

race.c

om25.

ｒｾｾﾷｾｮ＠ (R): Fot ｟ｧ｣ＺＭｯｭ｣ｴｲｩｾ＠ compocibility . An&le tlf 111 ｩ ｾ ｣＠ nc ' mn • is the sume t'or the pcn1nlns .m >nd BC.

:L J3otlt A Jn(l R ＢＧ Ｇ ｾ＠ ｬｮｬｾ＠ ｾｭｬ＠ R iM ｴｬｯｾ＠

"'"""ct ｣Ｎｾ ｰｬｲｵｭｩｩｯｮ＠ of A b. Both A nod R nro ｴｲｵｾ＠ but R is NOT n

correct ･ＢＨｬｬｮｴｾ＾ｈｯｮ＠ of A c. r\ ｩｾ＠ true bm R i.• f•l•e cL A is f11lsa hut R ｩ ｾ＠ 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.

ｒ･｡ｾｯｮ＠ (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 ｾ ｨｯｲｴ･ｲｬｯ ｯ ｬｬｩｦ ｾＮ＠

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

con·ecc explountion ol' A b. Bolli A ｾｮ､＠ R are true but R i< N01 ｾ＠

.:On..,c:t "XJl lllriJlli on 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 ｭｾｴ｡ｬ ｬ ｵｲｧｹ＠ teehniqut>. Reason (R); ho lbt poocess gf i•ocrntlc pressing. the p.rcssuro is C<t\llll in oU ､ｩｲ･｣ｴｬ＼Ｚｾｮｳ＠ winch permit unifonn ､･ｮｳｩｾ＠ of ｴｨ･ ﾷ ｭ｣｣ｾｬ＠ powder. ;1, Roth A ｾｮｩｬ＠ R nre 1rue ami R ｩ ｾ＠ 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 ｬＩＧｬＧｾ＠ slopwnlcb is pretCm-d In Lime scudy by stopw•tch method,

2\l.

30.

:n.

32.

,J of IS Rc!IS<m (R): Split h1111d 1ypc stopwatcl! eliminaco.; possihilil1es of ､･ｬｮｾ＠ 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 ｧｮｾ＠ 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＼ｾｾｯｯ＠ (R): l11o ｧｾｳ＠ undergoes on Lsentropic ex]'1n11•ion Lhmu&)o the porous pluw. 3 , Both A and R are true arul 1l is ILc

cocrccl ｣ＺＮｾｰ ｩｏｬｬｬ ｴ ｬｩｯｮ＠ of A

b. Bolb A and R "'"' Ｑｲｵｾ＠ 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<l ur obsul'binl) lhc lntut11 hcot of •ublimntion front the •urroundings. Re.1s<'n (!<): The lrlple point •It' Cfh cs ｾｾ＠about .5 ｬｭｯｳｰｨ｣ｮｾ＠ ｰｬＧｬｬｓＮｓｴｴｲｾ＠ 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 ｯｾｰ ｬｾＱｴｩ ｯｮ＠ 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 .,,.. ｣ｯ ｮ､ｩｴｩ ｯｮｩｮｾ＠ plant IS ｬ ｯｷｾｲ＠ chan that of on iccplru1L. ｒ｣［ｴＮｾｯｮ＠ (RI; 111e ｬ｣ｮｮｰｾ［ｲｮｬｵ ｲｯｳ＠ required in the JCI! plane are lower ｬｨｾｮ＠ UlQse required for an air-<>onditiomng pl•nt a. Both A nod R -:ore 1rue and R ｩｾ＠ lhe

uonttl ･ｸｰｬ｡ｮ＼ｾｴｩｯｮ＠ Qr A b, BoUt A anti R or.: ltue blli R IS NO'l' a

com...oct oxph1n.1tioo of A c. A ｩｾ＠ ltuc but R is C,,lJe cL A is f>bc l1ul R ｩ ｾ＠ true ｔｨｾ＠ rCllctlon {i n kN) nl ｴｬＱ ｾ＠ AUpporl • A· Jot the beam 'hown !n tl1<: given figure is

www.examrace.com

www.exam

race.c

om33

1Dl1 Jif

.w A a

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

a 16 ｾｎ＠ ｴｾｮｳｴｬ･＠

h 16 ｾｎ＠ ｲｯ ｭｰ ｲｾｾｩｗ＠

c 4 ｾｎ＠ te11sile .!.. 6 kN ｌ ｾｮｳｬｬｾ＠

34. T11o force> •let at n poniL l'bi: find rorce has Y and )' ｣ｯｭｰｯｮ･ｮｾ＠ o I' 3 N and -5 N respectively The r.:sultnnt of these forces falls on I he ｸＭｮＮｾｉｓ＠ and hAS a ｭ｡ｴｾｮｯｴｵ､･＠ of. -l N. ＱＱｾ＠ 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 ｵｰｷｮｲ､ｾ＠ wllh a ccrtmn 1docot)' from the ground. It takes ··1 se.conds to reach the ma:mnum llmgln There Is no ｡ｾｲ＠ resistaoce The tJme taken by the stnne to reach the ground irom ｉｴｾ＠rnaAtrnum hct£)11 ｦｾ＠"- J T b I.S I c. I ::!5 T cl I

36. for u ｧｾｷｮ＠ veloctty of the proj<eule, the ｲｵｮｧｾ＠ 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 ｾｨ ﾷ ･ｮＩ Ｎ＠ Ｑ｜ｳｳｵｭｴｾ＠

tltc pulley to he ｬＧｲｩｾｵｯｮ ｬ ｣Ｚｳｳ＠ ''"d g ｉｏｭ ｬ ｾ＠

one cnu say thltt the

-!;;-----{9 . ｾ＠ ...

work done ｢ｾ ﾷ＠ the man 15 I!)() J 2 work clone hy the mon ｩｾ＠ 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 ｴｨｾ＠ ｳｲｮｴｯｭｾｮｬｓ＠

a. I Wld 4 nre correct b ｾ｡ｮ､＠ 4 an: correct c. I. 3 and ｾ＠ ore correct d. :land 3 nrc correct

Ｓｾ＠ ConSJder the rouowwg statements regarding power: I It is Lhe capacity of a machine " The ｣ｦｦｴ｣ｾｯ｣ｹ＠ ﾷｾ＠ ah1uys ｉ ｾ＠ thlul unit\

as ･Ｇｾｾｲｹ＠ de'''sc op crntt:S wtth ｴｾ＼ｮｮ･＠toss of .mcrgy.

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

4 Wnu-hour •s ｴ ｨ ｾ＠ 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 ｾ＠ nrc correct ll. 1. 2 Wld -1 aN ｣ｯｲｲｾ｣ｴ＠

39, A man 15 dra1VIr1Jl 1vatcr from o well with the help of a bucket wluch ｬ･ｮｫＮＮｾ＠

unifonnly, TI1e ｢ＱＱ｣ｾ｣ｴ＠ wcogl)s 200N when full whde IO(l i'.f of ｷｾｬ･ｬＧ＠ leaks out by the hmc it orrh-cs ol the top. ｾ ｬ ｡ｴ･ ｲ＠ 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

ｾＰ Ｎ＠

a 1000 J b 1500) c 1000 I ll 3000 1 Which of the foll owing condition; ｡ｲｾ＠ to he ｳｮｴｩｾｦｩ･､＠ by o two-mass system wh1ch is ､ｶｮ｡ｭ ｴ ｃｉｉｉｉｾ ﾷ＠ equivnlentto a rlgtd body?

www.examrace.com

www.exam

race.c

om41.

42.

-13.

.u.

Tile ｴ ｯ ｴ ｾｬ＠ rnA$! •hou!Q be eqWJJ to llwt oflne rigid body.

l. The centre of gm1·ity should <oincide with that of ｴｨｾ＠ ｲｩｾｴｩ ､＠ hody.

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

axis thr ough the ｣ｾ ｮｴｲ ｩｊ＠ or gnrvhy .must ba eqoolto tho I of the rigid body.

Sele<:t the ｾｯｭＺ｣ Ｑ＠ ｾ ｮ ｋｗｉＺｲ＠ 11$IJ18 the Ｂ ｯ､ ･ｾ＠

given ｾｾｬ ｯ ｷ ﾷ＠

<:odes·

"· I and 2

"· Ｒ ｾ ｮ ､Ｓ＠

.:. I and 3 (L 1. 2 nnd 3 n,c ｩｊｵＺｲｴｩｾ＠ IOI'C<= ;,, a ｙ ｾ ｉ｣Ｚｭ＠ '"directed itt n. t.ero degr<les to U!e ｯｾｯ･ｬ･ｲＳｴｩｯｮ＠b. 43 degrecS•ld tho acc.:leo-at.i(lll c.. 90 degre<:s 10 U1c acceletalion u. I ｾＰ＠ ,logt'<OeS to the a<ll:elenllion Mn!cll tis\ • I' Wilh J.,isl • fl Oltd sclcx1 lite ｣ｯｾ｣ ｴ＠ ｡ｵｾｷ･Ｑ ﾷ＠ using_ the codc:s givl.lu below lhc u.ts: Li<t - 1 A. Pantogmph B. ｓｩ ｮ ｧ ｬ ｾ＠ slider Cf'll nk cluin C::.. Double slidec crank chain D, Strnfght line motion Lost- n 1. ｓ｣｡ ｴ ｾｨ＠ yoke mechanism 2. J;louble lever ｭ ｾ ｨｯｮ ｩｳ ｭ＠

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

A B <: f> • 4 3 S I ｾ＠ 2 5 3 ｾ＠ 2 'S 3

5 Por spur with genr raril, grearw lh•n nne, tlre ｩ ｮｴｾ､Ｂ ･ｲ･ｬｬ｣･＠ tS mod likely to ｯｾｯ ｵｲ＠

O.C:l l' the ;L pitch paint

b. point of hcgiun.inl!< of cmUat.t C. J)Olll t OJ ond of COilfli OI

d. r-ool oflh.: tooth fo ,, juut n1l bcaJing p = ｴｾｶ｣ｲｾｧ･＠ bcar.ing pres•llrc, Z - nbsolme visCfflity of the lubricanl. N rotullonal spc;ed vf' ｾｲ･＠ JOum•l.

-13.

·ll).

47.

48.

-l!l.

b elf ll Tite bearing ｣ ｩｾｄｲ｡ ｣ｴ･ｲｩＡｬｩ｣＠ number ili si''ell by a. I.Nfp b. p!l.N c. 7JpN

d. 'N/Zp t\ ｊｏ ｕｦ｜ＱｾＱ＠ ｾ･ ｡ｲｬｮ ｧ＠ cof ､ ｾＱ ｭ｣ｴ･ｲ＠ 2S em und lc;nglh 40 em carriC! ｾ＠ toad of 130 kN. TI•e ｄｖｾｊｲｮｧ｣＠ bearing prcs f ute IS

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

b. 15 ｫｎ Ｏ ｣ ｣ｮ ｾ＠

<:. l 50 ｬｯ ＧＭｉｉ ｣ｲｮ ｾ＠

d. ntme nf U1o uhovc

The momenl of inetfi:tl Qf • tlywheel I!! 2()(10 kg m' !Hartong from rest 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 !( :. t eti(: IVOir of cm el'g )'

2. mfnimi74 ｣Ｚｲｾ ｴｩ ｾ＠ ｦｬｵ ｣ｬｵｬｬ ｬ ｩｯ ｮ ｾ＠ in 1hc: ･ｴｾｧｩｮ･＠ <peed

3. tnkes care of lood tluciJJntioos in the c:ngme a.ud cuuli·ol:b ｾｰｴｯＺ･､＠ "adalion.

0[ thesil•t•Wmenl< ｾ Ｎ＠ l and 2 ore ｣ｯｲｲ･ｾｬ＠b. I ond ｾ＠ u<c cmn:cl <:, 2 llll d :! ure. COn'o!CI

d. L 2 and 3 nn: c:orn;cJ In • ｓ ｰｲｩｮｧＭ｣ｯ ｮ ｴｲｯｕ ｾＺ､＠ ｧｱｶ ｾＱ Ｚｮｵ ｣ ﾷＬ＠ the controlling foroc curve is str•jgbtline. 1 h<> balls ure 400 mm ｾ ｰ｡ｲｴ＠ when the o:anlrolllng force is 1600 N. and they 11re 240 nun apnrl ｷｨｾ ｮ＠ 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 ｦｯｵｲＭｾｴｲｯｫ･＠ engme Is ballli.ICed m wbicb oftbe til llowing'l L [>runary fcu-.:es. 2. Prim><') <ouplcs.

www.examrace.com

www.exam

race.c

om50,

5 1

Sl

3. Secondary forces. 4 Seconclllry ｣ｯ＼ ｾ ｬ ｩ ＼Ｎｓ Ｎ＠

Select ll1e ｣ｯｲｾｴ＠ auswer u;;lllg tl1e co(les £lven below· Codes a. I nnd ｾ＠b 2. 3 and 4 c. I and '2 d. Ｒ｡ｮ､ｾ＠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 > ｾ＠

Po1· the vibJalmy Ｎｳｹｾ ｬ･ｭ＠ shown 111 the ｧｪｶｗｾ＠ figure ｴｨｾ＠ natural Frequeucy Qf vibration in r4d/sec is

ｴＮＮＮＮ｟ ］ＭＬＬｵｾ＠

lSJ .. ·•u .J.. ｾ＠ .)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 sti fTncss of ｴ｢ｾ＠ spring is doubled ｾｴｾｾ､＠ the mass is ｭ｡､ｾ＠ 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 princip!ll ｾｴｲ･ｳｾ･ｳ＠ 111 a f':itU iu an elu.stlc material ｾｲ･＠ 60N/mm tensile, 20 N/mm' tensil e and 50 N/mm' compressive Lfthc material propcrti'cs are: ｾ ﾷ＠ = 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 Ｏ ｭｭ ｾ＠ lhan tbc elastic component of the strain is very close to ... 0.0004 b, 0.0002 c. !WOOl d. 0.00005

55 A weight tall s on a plunger fitted In a container filled with oil thereby producing a pressure of 1.5 Nlmm2 in the oil. The ｂｵｬｾ＠ Modulu$ of oil is 2800N/mml, Given this 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 ｾ Ｎ＠ 0,50 d. U.75

57 Which one of the given bendin!l mom<.>nr diagrams correctly reprcseuts tbat of tltc loaded beatit ｾ ｨｵｷｮ＠ in Fig?

www.examrace.com

www.exam

race.c

om

5R

59

c r Jl

A).. • Q - ..... ｾ＠" L'> ta }I .

IOl Ｏｾ＠

A OOUll carryong u un1lbnnly distribuw.d load rests on two $uppom ' b' apart \lltll equal overhang$ 'a' nt ｾ｡｣ｨ＠ eml. 111e rutfo bin fnr 7.cro bendmg moment at mld·SJl'Jll ｉｾ＠

a, ｾ＠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 ｣ｯｲｲｾＮＮＺｬ＠ answer usmg the codes giVCII hcluw the Lists .List-1 II Slope of-shetlr force dingrnm B Max1mum sheur tbrce C' ｍ｡Ｎｾｩｭｵｭ＠ clenection P Magmludc of lnaXImUm bcndm!!

mom em I "1 II

b\.1.

I'll

1 S.ol' Ｓｍｾ＠ il

2. w

3 ul' 5

ｾ＠ "' ｾ＠Codes:

J\

a. I

b. 3 c 3

B 2

2

c 3 ｾ＠

D 4 4 ｾ＠

d. 2 ｾ＠ J The shenr rorcc diagram ol' a loaded beam 1S shown in ｬｨｾ＠ 1011<111 Ill!! figure

Ｂ ｾ＠

Ｑ ＡＮＱ ｾｾ＠

ｔｨｾ＠ maximum Bending ｍｯｭｾｮｴ＠ or tlw hc:um b a. 161\N- m b. II kN-tn c. 28 kN-m d ＸｾｎＭｉｮ＠

A steel shut't of outsido ､ｾ｡ｭ｣ｴｵｲ＠ HlO nun IS solid over one hal r 1.1f ｉｌｾ＠ length 11nd hollow over the oth<tr half Inside ､ｴ｡ｮｬ｣ｴｾｲ＠of hollow ponion ts SO mm. The shnf\ is h<dd ngidJy ut l\\O ｾｮ､Ｎｾ＠ nnd u pullo) Ｑｾ＠

m•lllllted at its m1d:.<!ell<m 1,e., ut the junl1ion.ol' soltd and holl ow portions The ｾｨ｡ｬＩ＠ Is twi$ted b) upplyins torque on the pull ") If tl1e torque oamed by 01e solid pM1on or ｴ｢ｾ＠ shan i:> lliOOOkg-m ｴｨｾ＠

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 ｳｰｲｩｮｧｾ＠ •l'l obwinc-d will he a. (u) lloublcofthatot'thcongmal >-pnng b tb) SUIT\e us thnl of the <>ngmal sprtng

www.examrace.com

www.exam

race.c

om

94.

c. (c) ｨｾｬｦ＠ oflltM ofllae on gina I spring d. (d) one-fourth of tool of the originnl

S(lfin g Match La•l·l ll:!nd conditions of long columns) wiUa LJSL -U (CtiUcal load) and scJ ed lb o COrNel answer us mg the codet given helow the Listsc Usa-1 A. Buill-in ol one end and pinned ogninst

lateral deflection al ine oilier ｾ､＠B •. Both ends buill-an r Both ｴｮｬｬｾ＠ t1i1111•d IJ. One end buill-in nud ｴ｢ ｾ＠ other end free List n

K'h.l I. L'

'21rE/ 2. /..'

-t;r El 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 ｣ｹｬｩ ｮ､ｲｩ ｣Ｎ ｾ＠ I ｾ ｨ ･ ｬｬ＠ of dinmt:tcr 'd' und lhkk.rJcss ·a· ｾｵｨｪ ｣｣ｬ･ ､＠ to ianem:al pN!•ure h•vill l! 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 ｾｰ Ｉ＠4rE

ｌ･ｮ ､ ･ｲ Ｇ ｾ＠ lines on <toe) .Sp"'-'uncn under simple ｴ･ｮｾ＠ ion test i;a n ditcct lmli.:.•tion of yielding of mlltalnl due to slip nh>ns the-l•lnne a. of ru1aximum pnndpoJ stre.s• b of maximum sb.,,r stress .:. ofll\ading

M.

67.

70 .

')of l l 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 ｾｮｧｬｬＡＮ＠.J. Small uncut ehip Utlcknt:ss. ｃＨＩｮｴ ｩｮｵ ｯ ｵＮ ｾ＠ ｣ｨ ｩ ｰ ｾ＠ ｾ＠ iUtoul buill-up oJge wquld be li 11: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 wnl has a lifo a)f 180 minutes "' a cull ing spoctl of 1 Smtrttin, If the tool life ｩｾ＠ n:ducc:d 111 4.5 mlnlll es. then ll1e cutting Kpt:ed will he a. 9 m'mili b. IN m min c. 36 mtmirt d. T.!mlmin l'n ruming, lhe rolio of llleopllmum cutting speed few ntinmaum wsl and optlm u:m culling • peed for WILXllllWII rnlo nf productiPn is ｡ ｬｷｯ ｹｾ＠

a. equ;alto 1 b. in the ｲｾｮｧ ･＠ 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 ｰｲＨｬ｣ｾｾＢＢ＠ c:Jn be used for pa'Oducing lltiu, laanl, weal resistruate.oating sucltol TiN. u!lHSS7 1. Physieal vapour deposlliotL 2. Sinter ina under redueing utmOSjlborc. 3. Cllcmioal V3pOlll ' deposition wi th llO$l

t.realment.

4. l'bsmo spraying.

Select alab =• ｮ ｾｷ･ｲ＠ ｵｾｩｮｧ＠ the "''""" given l>elaJw· Codes: a. land3 b. lond3

"· 2 and 4 d. J and 4 M•l ch r.isl l ｬ ｭ ｴＺ･ ｨｾｮｩ ｳｭＩ＠ with l,i.st-11 {1\.lsoeiuwd function) and ｾ･ｬ･｣ｴ＠ Uae

www.examrace.com

www.exam

race.c

om71

correct answer 01!ng !he codes given below the ｌ Ｎ ｩｌ ｾＺ＠

l..ist-1 A. Geneva gearmg B. R.1tchct and P:twl C. Whit wor1l1 D. Rocbnd plnitm t.ist-11 I Ｎｐｾ＠ motion in sbaper 2. Feed motion. in drllltng rnochotc J . Lnde>clng ll t'llJn'cl ｾ Ｎ＠ 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 ｾ＠ 2 ;\ sllln .ct.Jnl gear ｬｴｾ＠ •n vuL•idc dill.!l tetor 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: ｾ ｬ ｴｲ ｯｴ［ ｴ＠ fiii SWtl' USing U1e ｏｉｊｾｃｓ＠ 8 iVen

below tho Li•b : L ist I

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

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

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

.:. I 3 2 d. ｾ＠ 1 2

D 2 2

4 ｾ＠

73. \\')li ch <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 ｴｨｩ ｾ ｬｭ ｣ＤＤ＠ to

ｨｬｾｮｫ＠ dillmottr f ｷ ｯ ｲｾ＠ mnLcrinl b. ｄ ･ ｣ｲ･｡ ｾ ･＠ in the ratin of thickness to

blAnk di4melcr of work materinl c:. ｄｾ｣ｲ ＮＬＮ ｡ｳ ･＠ m th..- holding force on the

blJlnl;

d. l1$e of ｾｯ ｴｩ､＠ 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 ｬｨ ｾ＠ ｾＺｾｾ ､ ＮＬＮ［＠ given ｢ ｾ ｬｯｷ＠ ｬｨｾ＠ Lists: L i>t-1 (\.. Rnil110)' "ngQn ｜｜ｨ･･ｬ ｾ＠

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 ーｲｯ｣･ｳＮｾ＠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 lit er oapocity1 l. ｬｮｪ ｾ ｴｩｯｮ＠ mouldinB 2. Jolt rnouldins 3. 131ow owulding ｓ ｣ｩ ｾ＾ｃ ｴ＠ Ulu enrrect :mswer usirut the ｾ ｯ ､･ｳ＠gf..·en below: -Codes:

a. I 411\12 b. 2 and .1 c, land 3 d. 42 and 3 Whioh or the foll owing 1'"'"' •rv comctly matched? I Drill pR:li$ : l' repanolng

www.examrace.com

www.exam

race.c

om

2. renw (¢111; grindini! : Thl'ough feeding 3. Capstan lathe : Ruin type tun"! Selecl the ｃｏ ｬｔ ｾ Ａ＠ ［ｭｾ｜ｖｴｬＧ＠ 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"''! ｾＧ＠ S ｨｶｵｾ＠ duty ＰＱＱｾ＠ n jnh ｳ ｨ ｶｾ ｬ､＠ lijkc: ｾＰ＠ ｭｩｴｵｬ｣ｾ＠ 1.o ｾｯｭｰｬ･Ａ･＠ il. Uul a.nc-r 8 hou.o-s :m ｯｰ･ｮｾＡ＠ or is ｾ｢ｬ･＠ to complete Quly 14 &uch johs. 'The oper;otor's perfonnancc IS

tL ＱＷｾｃｉＬｮ＠

b. Ｗｾ Ｎ ＵｾＮ＠

c. ｾＷ Ｎ ＵＢﾷ＠

lL ＹＷＮＵｾ＠ .. 79. Wbicb of lhe following .:ao be ｣ｯｮｾｬ､ｯｲ･､＠

to be tho>advnnlagcs ofproduct!Jyoul'l I. ｒ｣ ､ｵ ｾ｣､＠ tllattll'ju I ｬｴｾｯ､ｬｩｮｧ Ｎ＠

2. Gn:•tt:r ｮ ｣ＮＮｾ ｩ｢ｩｬｩｴ ｹＮ＠

3. ｌｯＱｾ｣ｲ＠ CDpil.'ll inveslrucnl 4 . Bcu:ct utilization of men ontl ｭｮ､ｴｩｵ｣Ｎｾ Ｎ＠

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

c. I nnd 4 d. 2and ｾ＠

80 Activities involved in producliOfl planning and conu·ol ｾｹｾ ｴｬｭｬ＠ are ｬｩｴｾ､＠ 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'i tt"'' 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 ｅｬｾ･ｖｯｬｑｲＺｳ＠ nrc us<!<! for moving ｊｲｵｴｴｾｔＮｩｯｬＡ＠

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 ll iswncc d. in hoth the plnnes

82 Therl>ligs ore es.ential in a. flow procells ｾｨ｡ｲｴ＠b. motion economy c, method-•n(•lysi• chnrt d. •uggcotio-n ｳｹｾｴ｣ｬｴｬ＠

ｾ ＳＮ＠ Con.<idcr tHe litllowing prindph:!l c

84.

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

2 Relicvin.!! ｴ｢ｾ＠ h:mds of ｜ｖ＼ｊｲｾ＠ •l•hencv.:r po!<.• iblc

3. Kocping tl•e w01'k ln. Uuo uutrua l ｷｯｾｫＮ＠

4. Avoiding having both baud> doing ll1e ｾ ｯｲｮ･＠ thing nl the same rime.

ｐｲｩｮ｣ｩｰｬｾ＠ of motion eC(Inomy wqul(l inclullo a. 42and 3 b. 2. 3 llltd 4 "· I. 3 and 4 d. 4 2 ｡ｮ､ｾ＠CQMider rhe follo\\ing dt•rll>: 1. Mnn-tuacbinc cluu·L

2. SI.MO dlllrt. 3. Load ｣｢ｾｮＮ＠Those used ｾｾ＠ ｮ ｬｾ ｢ｯ､＠ stuuy would indnuo a. 1,2and3 b. land 2 c. 2ond 3 d.. I >nu3

85. lloc ｬｩＮ ｾ ｣､＠ ｣ｯｾｬｩｬ＠ li ir a yc., is ｒｾＮ＠ K ｬ｡ｫｊｯｾＮ＠v:ori•blc .:o•t I'"' ' unir i• fu. ｾ ＰＯＮ＠ •ntl the selling price ••f e:och unit is ｒｾ Ｎ＠ '21)()1-. If Uoc •nnual el!lrmuttd ｾＳＱｴｳ＠ Is Kl;. :lO.OO.OOO/·. then ｾ ｯ･＠ break-evot\ vu]umc i• u. 2000 b. 301)(\

ｾ＠ 3333 d. 5000

86. Mnldo List·! (Type of loyow of ｦｯＢｩｴｩｴｴｴＬｾＩ＠with ｌｾ＾ｴＭｉｬ＠ (Applicotion) nod £elecT the Com:Ct an>Wcr U.<{(lg tn" COde$ gove11 below lhc ｉ Ｎ ｩｳｴｾ Ｚ＠

L.isl·l A. I' ｬｯｷＭｬｩｮ ｾ＾＠ t.yout

B. ｊ＾ｲＨｬ｣ｾ＠ Ia ' ''Jut C. ｆｩｾ｣ｴｬ＠ ｰｵｾＱｴｩｯｮ＠ layl)ut D, llybrid Ia )'OUt

www.examrace.com

www.exam

race.c

om

t..ist-n I. Flnmmablc. explosiYe products 2 />nlumohilo• 3. 1\ctO ーｬｾｮ･ｾ＼＠

ｾ Ｍ Jol! shap production ('ode,.;

\ B c D

•• 4 1 ) 2 b. 1 3 4 I ｾ Ｍ 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 ｾ［Ｌ＠ ､ｩｾｰ＾ｴ｣｢＠ 11l1 bills >nd invoice to lho

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

be launched .88. fn an ｾ､ｩ｡｢ｮｴｩｯ＠ process. SOOOJ of worJ, i•

pert'ormed on • !I)'S tan. 'l'he •y•te1n retllm> to its al'iginal ｯｴＮＱｴｾ＠ wltik t0003 of ｨｾｴ＠ ore oddoo. The work ､ｵｮｾ＠ durinJ!. tl1e non-odillbntic 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 ｾＺｯｮ･＠ IJWintiLy (JIOSit ivc:i ncgutivcl durina • pr'(Ness. Ut.m u.c Ｑ Ｑｲ ｯｾＢＢｾ＠

ｬｬｮ､｣ｲｧｯｮｾ＠ by the S)-stem is n. t•enthnlpoo b ｩ ｭｴｲｮ ｰｬ ｾ＠

c. h<>barie d, isothermal

?0 ｬｬｬｮｴｾｨ＠ ｬＮｩｾｴ Ｍ Ｑ＠ with ｌｩｾｉﾷｔｉ＠ :onol ｾ･ ｬ ･ｾｴ＠ the corree1 amwcr ｵＮｾ ｩ ｮｧ＠ the C(ld¢!; given be10I\ ｴｬＱ･ｊＭｩＶｾ Ｚ＠

Li•t·l A. U>nllt.'llltvolumt process B. ｃｯｮｾｴｮｮｌ＠ 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 ｾｴｯｵｧ｣＠ b> be m>intoined at -3"C. •n.e "'"bj1:11t ｴ･ｭｰ･ｲ｡ｴｵｲ･ﾷｾ＠ 27"C, lf ｳ ｾ ｴｴｦ＠ｊ＼ｊｾＱ＠ of "llr;rgy ｌｾ＠ 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＼ｾＬｾ＠ k\V b 75.3 k\V c. I Ｕ Ｔ Ｎｾ＠ It \\' d. 2543 k\V

When •ir Is ｑｏｭｰｲ･ｳｳ･＼ｾ＠ the enthnlpy t5 ｬｮｾｲ･Ｓｳｯｯ＠ fron1 1()0 to lOO U/!:g, ｬＺｬ･Ｎｾｬｬｾｳｬ＠during tl1Js con.prllSSion t.. 50 k.J/kg. Neglecting ｾ［ｮ･ｴｩ ｣＠ and fK>Imlinl energies. the power required for ;) mass now or 2 ｫ ｧｾ ｳ＠ 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 sidu, nitrogen gn.• nt '2 bar pre!>Sure nnd 20•r is flMent. ＨＩｾ＠ the ｾｴ ｨ＼Ｚｲ＠ side, nil.r\'IJ!t!O giiS al 3.5 bat' J) l't$5ure and 3S"C i.4 ｰＬＭ･Ｌ＼ｴｴｾ＠ TI1c chomher is tigid •nd ｴｨｃｬＧｭｮｬｬｾ＠ ｩｾｵｬｮｴ･､＠

1\-om the ｳ ｵｲｲｯｵｮ､ｩｮｧｾ Ｎ＠ No if the Jl'lrtiiion Is ranovccl a. hlj:h pressure niu·o::"'-• will eet

throttled

b. ｮｾ｣｣ｨ｡ｬｬｩｾ ｬ＠ ｷｾｲｫＮ＠ wW be! donu ul lbc ＢＢｰ･ｮｾｯ＠ of intcmnl mcrgy

c. work will be. done on low ｰｲ･ｳ ｳｾ ｲ･＠

nltt11gen d. Internal energy of rutrogen will be

cons.ervod

www.examrace.com

www.exam

race.c

om

94

95

For tl rovcrstble po"cr cycle. the ｯｰ｣ｲＮｵｩｮｾ＠tCOif"'mture limits are 800 K and 300 1\ ll takes ＴＰＰｾ ｊ＠ Qfheat. fh.:: una\ ailutlle \\llrk will be. II, 250kJ b 150 kJ ｾ＠ llO kJ

d. 1110 kJ l n Van dcr ｗｾｵｾｦＧｳ＠ gas t.oquat1on.

Ｈ ＱＧｾＮＡＡＮＮＩＱＱ Ｍ ｉ＾Ｉ ｾｒＯＧ＠ (R = universal gUll I·'

constum)Lhe unit ofb 1s· .., thre/mole •c b m1/mole c. kg-li ter/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 ｲ＼Ｚｰｲ･ｳ｣ｮｴｾＭ､＠ 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 ｾ｡ｧ ｬ ｷ ｲ＠ remperoture lin ､･ｧｲ･ｾｾ＠

ccntigradolllflh<: cycle wall be

a 31H8 b. 43.88 c 23 d. LtW

98. W1nch une or the f6Dowmg prur of 1lir ｾｬｮｮ､ｯｲ､＠ cycles has ｾＱ･＠ same effi('ten<::y us lhnt or Cnmot cyck when opcnmng ｢｣ｴｷｾ｣ｮ＠ 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 wi ll 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 ･ｸｰ｡ｮｾｈｊｮ＠ 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

www.examrace.com

www.exam

race.c

om

l 02 Au eogme worllng un DluscJ cycle ts ha'''"ll an rdeal eflie1enoy of 60'' • lllld a relative cmcicnty of 50'li The ･ｮｧｭｾ＠consumes 0 5 kgls of 011 hAVIng a calorific "fflue of ＴＰＬＰＰＰｾｊＯｉｉｧ｟＠ Tho pol\ler produced bY che ｣ｮｧｬｮ･ｩｾ＠a 24 MW

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

I 03 Cuusrdr:r the tbll owll1g stages: 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 ｬｬｯ ｲ ｬｾ ｲ＠ to the chinmey Is. lL ｾ＠ LJ. 4 b 1, :!,3, 4

｣ＮＺＡ Ｎ Ｑ Ｎ ｾ Ｎ Ｓ＠

d. 1 Ｒ Ｎ ｾ Ｎ Ｓ＠

Whrch one of che rollowmg Cuels rs u!'ed 10

､ｾｬ･ｮｮｲｮ｣＠ ｣ ｢ ｾ＠ wurer ｾ＾ｱ ｵｊｶ ｡ ｬ ･ｲｬｴ＠ of a bomb oalorrcneter'l a Benzoic aritl b. ｯｾＱ｡ｮｬＡ＠

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 reatll tl.ll

•

I 06 DutTn!l. un ｾｸｰ｡ ｮ ｳ ｩ ｯ ｮ＠ process, swnm posses thmUgll mel ｾｬｬｬ｢ｬ･＠ ｣ｯｮ ､ｲｕｑｮ ｾ＠

{supersalurnted tlow) Which of' che

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

J f rnal ｾｉＧＩ ﾷ＠ ness rracwm 4 Entropy elecl lhe correct answer usmg lhe ced.:s

given below Codes: a. 1 undl b lund J c. ｬ｡ｮ､ ｾ＠

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

to nn rmpul,;c 1utbme,

I the relnnve velocity of stenm at mlet 1111d ｡ ｵｴ ｬ ｾ ｬ＠ of movin!l,blud"-\ urcequ:il

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

smaller thou the rnlet ruca. Of ｬ｢ｾｾｓ｣＠ ｾｵ ｬｬ ｾｲｮ｣ｮｴｳＮ＠

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 ｾｴ ･｡ｭ＠ 1s 738.00 kcalnq;. J<c>r n ｦｲｩｾ ｵｯｮｬ ］＠ adrobru.re Oow. the velocuy of ｾＱ ･｡ ｭ＠ lit the ｾｸ ｵ＠ wrll be ｊ ｮｳｾｵｭ｣＠ I kcnl4 18 kJ} a. 582.lliJ (S

b ＶＰＰＶ ｭ ｾ＠

c. 620 m,s tL 6405 m,s

ICJ'I In nn axial tlow ｾ･｡ｭ＠ curbme. ｴｨｾ＠ Pllth ｴｲＢｊ･ｾ､＠ by u lluid panlc.le m ｬｩｴｾ＠ dc:siJ!,n pmnt1s "-n" helix ufconstunl mdrus b helix of varying ｲ［Ｑ､ ｩ ｾｾ＠

c. ｾｹ｣ ｬ ｯ ｩ ｊ ｡ｬ＠ path d 1ormdol pnth

I J 0_ lo the case uf uozzle ｧｵｶｾｭ･､＠ srewn turbines, sll)l\C eftieicncies very hltlc when compurtd with those wrth full 51ellln no" becaw;e 11. ｭ ｾｾ＾Ｎ＠ now ｲｭ ｾ＠ Jocs not n!Tect ｴ ｨ ｾ＠ Ａｯｴｬｬｧｾ＠

ｾｭ｣ｫｮ｣ｹ＠

www.examrace.com

www.exam

race.c

om

b inlet steam pressure in ｴｨ ｾ＠ ｦｾｴ＠ 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 ｭ ｾ ｵｵｵｭ＠ ｢ｬｾ､｣＠ cfl:i cit11oy of single $tage impul!,c turlline in term; of ｮ ｬＩｮ ｬ ｾ＠

｡ｮｧｬ ｾ＠ .L under ideal ｣ｦｬ ｮ､ｩｴ ｬ＼ ｮ ｾ＠ i• proportion•! to a. 1.!0!1 a: b. nm a c: sin\.t u. ＢＢＧｾ＠ u.

I 12. A po'"" plaolcolllSUJILC• coal nt theJ'liLO of 80kgls lmc tho> combU5Lion air required ｩ ｾ＠I I ks• kg of coal ｗｨｾｴ＠ wil l be tl•e power of Uuo F. D. Ian surplying the rut. if il! officioncy ls ＸＰ ｾｾ＠ ood it ､ｾＢ｜＠ 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 ｾ Ｎ＠ An import•nt rmmotcr to be moniliJrcd ｾｯ｣ｴｬ Ｚ ｩｲ ｵｲ ｯ ｵ ｳｬＩＧ＠ for ｾ｡ ｦ ･ｧｬｬ｡ｲ､Ｉｮｧ＠ turbine rot(ff in • steam power t•Joot ｩｾ＠｡ ｾ＠ 5team inJet prcssllrQ'

b. stennt in let lcmp-..-rnturc: c, •hall ｜ｾ｢ ｲｮｴｩｯｮ＠ )ovcl d. beouin_g ｴ ｵ ｭｰ ･ ｲＺＺｾｬｵ ﾫＺｾｳＮ＠

114 /1. centrifugal pump having on ｩｭｰ ･ｬｬｾ＠ of I 0 em dillmetor discllarg"" 40 litre ｾ･｣ｯ ｮ ､＠

1\ hen fUnning t l I tlOO rpm. ｬＧｨｾ＠

w"""'pond!Jtg •pced of ｾ＠ ｧ｣ｮｭｾｬｲｩ｣Ｚｌｕ Ｉ＠

&imllar pump ｨ｡ ｶ ｩｮ ｾ＠ :an impeHer of 40 ｾｮ＠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 ｣Ｚｌｾ･＠ of frnncis lnrbine-, velocity

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

ｾＧ ﾷ ｾｬｬｾ｢ ｬ ･＠ l teod ｾｮ､＠ V 1 is the ｾ Ｎ＠ absolute VdhlCity at the drnt) tulle ｾｮｬ ･ ｴ＠

h. meun veloclty of !low m tl •c turbine c. Absalute Ｑ＼Ｚｬｶ｣ｩｴｾ ＠ 31 the guide van<;

inlet d. flpw w looity .t the .rolm ｩｵｬｾｴ＠

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

ｬｬ｡ｲｬｴｦｮ ｾＮ＠ the ｾ ｰ ･･ｩｬＱ･＠ s-pa::<l uf the mod.el N..., ｾｾ＠ related LO the pl'ulill ) pc ｓ ｴ ｾｩｬｩＢ＠

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. ｬｭｰ ｲｯｶｩ ｮ ｾｴｵＮ ｩＺ＾ｩｮ ｣＠ hlado cooling. 4, Providing Ｚｾｩｲ＠ 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 ･＼ｾｲｲ･ ､＠

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

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 ｯｮ ｾ＠ of the {i) tlowmg ーｭ ｾ＠ i$ NO'I' C(Jfftctly nmlchcd?

ｾＱｵｴ｣ｲｩｵ ｬ＠ Funct io_tt ill u nucltur r e3rror

11, ｇｲ ｰｨｩｴｾｲ＠ • Mll<lcl'a tor b. Lcud ｾｯｦｬ･｣ｴｬｬｲ＠

e. lfntnium·2.'S · fuel d. ｃｯ ｮｾｾｴＺｴ･＠ . ＡＳｩ ｯ ｬｯｧｴ｣Ｎｾｬ＠ $ltitld

120. Coru>ltlcr Ute l'otlo\\ing ｷ｡ｹｾ＠ ofdispus• l of n udeAr 1\ ru;tcs: 1. Tlll' nwmg tbetn in the dt:<.1' sc>. 2. ｦＮｯ ｡ ｶ ｩｮ ｾ［＠ lhc:111 .in remote, 3ot.tcd Ofl""

Ｇｾｰ｡｣･ｳ＠ ln barren monnt:tin ous regions. ,,, St:aling lh<lm in i:Qncrete cmd

Jcpusiling tJu:m in ｾｮＺｖｩｬＺ･ｳ＠ and C-!\VCinfS ｾｾｾ＠ {be cJoc.-p ｉ｜ｃ ＮＳ ｾ＠

4 . Storing them ill sc!nled couorut.c cooiPiners in ､ ｩ［Ａ ｵ ｾ･､＠ ､ ｾ ｰ＠ mine !h•fl•

Safe w•y• of ､ｩｳ ｰｯＮｾＺｩｬ＠ of nuclcor ｷｯｴ ｾ＠

Wn\lld include ;,, I, 2. 3 and 4 b i. 3 •nd J c. I aod 2 d. 3 anli4

www.examrace.com