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I ｃＮｾ Ｎ Ｎ Ｍ ＱＧ ｲ･＠ 1'195 I ot I I

.._ _ __ MECHANICAL ｅｎｇｉｎｅｅｒ ｟｟ＺＺ｟Ｚ ｉｎ Ｍ］Ｍ ｇ ｾ ＭｾＭＮＮＮＮＮ＠

1

3

4

5

Whicb of the following are dte inversions of double slider cranl mechani$m? I Oldham coupling. 2. Whitworth quick return moabanism. 3. Beam ｣ｮｧｬｮｾ＠ mechanism, ｾ Ｍ .Eilliptic trammel meclutui$ru. Select tho c<>rrect answer from tho codes given below CQdes a. 1 and 2 b. 1 nnd 4 c I 2and 3 d 2.Jand4 Which one oF the foll owing is a higher pair? a, Belt and pulley b. T uming pair c. Screw pair d. Sliding pair The mechanism shown in tl1e given figure represents

• ...._ '

--,·-· a. Han's mechanism b Toggle mechanism c. Watt' s mechanism d Beam Engine. meohanrsm A point on a connecting link (excluding eud points) of a double slider crank mechRnism traces a a. straight li ne path b bypelbolio path c, parabolic path d. elli ptical paV. In the four bar mechanism shown In thO!. given figure, Jinks 2 anil 4 have equal lengths. Tlte poi Ill P ott tJ1e coo pier 3 will generate aiM

7.

8

9.

" a. Ellipse b, parabola c. approxlmarcly straight line d. cirole Deep groove ball beiogs are used ror a. heavy Utrustload only b. small angular displacement of shafis c. radial load at high speed d combined thrust aod radial loads at

higb speed The sensitivity dh/dN of a given Porter Governor, where is the height of the pin poiot A li·om the sleeve and N ls rl1e c.p.m.. is pro.foaional to

h

a. N1

b NJ I

c, /'P

I d. N'

Balancing of a rigid rotor can be achieved by appropriately placing balancing weights in a. a single pl;ute b. two planes c, Lllree pl'anes d. four plane$ A machine DlOWlted on a single roil spri.ug has a period of free vibration ofT If tile spoiog ls CUi into four equal parts and placed in parall el and the machine h

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mounted n them. then the period of free lllbration of the new system will boccmc a. 16 'f b. 4 ·r c. '1"14 d. 1'/ 16

I(} WbJcli UIIC or the following pal<:> is ｣ｾ＾ ｲ ｲ･｣ ｬｬ ｹ＠ ma!thed'l a, Coulomb .Enefl!y Principle b ｒ｡ Ｎｹｬ･ｩｾ ｨ Ｌ＠ Oynamic &wilib rium c. D'Aiemben, Damping Force d. Fourier, , .. .. , , Frequency domain

anai)•sis I I Whining speed of a shafl coincides with

l11e llltlllral frequency -of hs a. longitudinal Y1bratfon b. Lransverse vibration c. lorsfonal vibration d. cou(lled bending torsional vibration

12. There at·e six gears A. D. C. D. E. and J7 iJt

a compmmd Lrain. Tlte numbers nf teeth i 11

the geaf!i are; 20, 60, 3(), 80, '25 and 75 respectively The ratio of the anglllar speec;ls of 1}1e 1hiven (fol to tho. driver (A) of the drh•e is a. 1/24 b 1/8 c, ijfl5 <I- 12

13. A fixed gear bavlng I 00 leell l meshes wlUt another gear having 25 teeth, the centre lines or both the gears being joined by '"' ann -<<> :Is to ibnn an epicyclic gear train. The number of rotations made by lbe $mal1er 11ear for one rotalion of the arm is il. 3 b. 4 c. 5 d ()

14 A truss of span 9 m is loaded as sbown in lite given figure. fhe number of two-force ｲｭＺｾｭ｢･ｲｳ＠ carrying zero force Is

C D E 'F

9 kN J2kN ｾＮＳＰＳ ｭ Ｍ ＹｭＭＭＭ＾Ｈ＠

a one b. two c, lhri!l>

T

l u( ｉ ｾ＠

d. four 15 II system of Forces acting on a lamina is

sbowu iu the given lig111 ｾ Ｎ＠ TI1e resullAnt of the forc.e system will t!teelAO at ION 10 N

i ｾ＠ l·Om__, <)---20N

0·5m

A c 8 0

ｬｾ＠_____ _.

ｉｴＭＭ ＼Ｇｾ＠ ..... t0'5r.>->l UQ.N

a. "' b. B c. c d. D

I G A roller Of weight W is roll eel over the w()(ldcu block shown io lite given l1gw·e The pull F required to just cause the saki ｭｯｴＡｯＺＺ［ｮｯＺＺｩｳｾ ＭＭＭｾ＠

a. W/2 b. w G. -b IV d. 2W

17. Ill the given Jigure, two ｢ｯ､ ｩ ･ｾ＠ of ma!;Ses mt and m; are ｾｯｮｮ｣｣ｴ･､＠ ny a light ine>ctensible striog passing over a smoodt pulle)' Mass m1 lies on a smooth Mrizoutal piSJJe ｗｨｾｵ＠ mass m 1 moves downwards, the ｾ｣ｴＺ･ ｬ･ｬｬｬｴｩ ｏｩｬ＠ of lhe two bodies is equal lo

a.

b.

m1g m I s1

m1 +-mr

ＧＢ Ａ ｾ＠ ｭ ｩｾ｜ＬＢｊ＠m, - nr'!

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19

20

'21

d "'•8 tn / ,; 1111- m:

A ball is projected verticall y upward with a certain velocity. II takes 40 seconds for its ｵｰｷＦｲｾ＠ journey 11u< thne Ulken rpr hs downw&rd joumey Is a.. 10 5

b 20s c. 30s d 40 5

Maloh List I w1th LiSt U and select the correct am;wer usio11 tbe codes given below ｾ｡･＠ Hsts. Ust L A 'rwu p<ltll ll el forces actln,g uo a body.

movh•g w1th uniform velocity B A moving panicle C Two coplanar parallel forces e(lu;t) in

magnitude and opposhe in direction acting on a body

D Two unequal forces acting on a body Lfstll I. Kinetic energy 2. Couple J. J.orc.es 1n eqaili bri um 4 Cause acceleration Codes

a. b c. d.

A I )

3 3

B 3 2 j

4

c 4 I 2

D 2 II 4 2

A spring of stiffoess I 000 N/m is stretched initi ally by JO em tiom the unre.l'ollned position 'rhe ｷｯ ｲｾ＠ required 1.0 stretch it 1/y another 10 em Is a. S Nm b 7 Nm c IONm d 15 Nm II truck weigbins 150 kN and travelin1f at 2 m/sce impactS wi th a buJTe.r spring which C<lll tpres$es l25 CJ]l per 10 kN, 'lire maximum compresstQn ofthespring is

｜ｳＺ［［Ｚ Ｌ ｾｌＬＺＭＱ＠a 20.00 em b. 22.&5 CJ]l

22

'23

24

25

C. 27 66 Clll

d. JOOfl em

J u ( ｉ ｾ＠

In an axis-symmetric plane strain problem. let u be ｾ Ｑ｣Ｎ＠ radial displacemenr at 1 'J'Ilco the strai n componen ts s. s, .. rn• are given by

11 ('u ;;=,I a. e, ｾ ＷＭ Ｎ ･ ＬＮ］＠ fJr .f"'= t'rfiO

fl 1 II b e, ｾ Ｍ Ｎ＠ Ｍ Ｎ［Ｚ ｾｾ＠ - - ,r,,,-0

?r ,.

u Cu c. e. =- .sf\=- ... ?,. • .:. U r ,-,.

i'll "'' r"u d. s, ｾ＠ Fr ,c. = {lO. r"' = Fri'm

Match List I wi th r.ist If and select the correct answer using tbe codes give.o below the ｬｩｳｬｾ ［＠

ｌ｡Ｎｾｴ＠ I ｾ＠ Rigid-l' eriecdy plasric B. Elasuc-Pcrfe.etly plastic C Rigid-Strain, hardening D. linearly clastic E Listll

Codes; A

8. 3 b. l c. J d. I

B I J L J

c 4 2

4

D 2 4 4

2 The independent elastic constants for a homogenous and Isotropic Ollllt'rial ｡ｲｾ＠a E, G, K, v b. E,G, K c. E. G. v d. E, G Whith one of the follo"ong materials is highly elastic? a. Rubber

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27.

28

29

b, Brass c Steel d Glass In a homogenous, ismropic elastic marl'rial the modulus ol' elasticity e: In teyms of G and K is equal to

G+3K a. 9 Kr.

J(,4 K b.

e

"

!JKG

9 K(;

r. f Y< 9 KG

K ; 31]

A beam AB uf leng1h 2 L havong a coucentrrued load P at io.s mid-span is hinge-supponed at its two ends A and B ｯｾ＠ two identical cantilevers -as shown in the given figure. The correct value of t·· :o-r··. i

ｌ Ｋ ｌｾｌｾｌ＠a zero h 1,1, I'L c. PL cl 2PL r:or the loaded beam shown 1, th" correct $hear force diagram ｩｾ＠

At=L Br 21 (4)

(b)

:

ldl i rn shafts of same length ""d material lll'e joined 1i series. If the mrio of lheir diamcturs Js 2, tloen lhe o:atio ()f thllir angles uflwist 1vill be • 2

30_

31.

33

.1 u( 14 b. 4 c. 8 d. I (i Tbtal strain energy stored iu a silupl) suppuo1ed beam ut' spSJo • L' tmd t1ex.ural rigidity ' E'I' subjected m a concentrated load ·>V' at the cemre i:; equal to

W'L' a. 40F.J

b. w'r! 601i7 W'J!

c. 96((/

d ｷ ｾ ｲ Ｇ＠

24(1111 A colurno of length · r is fixed at its both ends The equi valent len&>1h of the ｾｯ ｬ ｵｭｮ＠

is a. 21 b, 0 5 / c. '1. / d. r /1 ｾ ｯ ｬ ｩ､＠ circular shaft ｩｾ＠ subjected to a mluc.imum !iheariug s1tess of 1.-IU MPa. The oTOagni(Ude of ｴｾ･＠ fru!;>:imunt normal Stress developed in the shaft is a, 140 MPn b. 80 MPa c. 70 Ml'a d, ＶＰｍｐｾ＠The shear ｾｴｲ･ｳｳ Ｍ ｡Ａ＠ a point in a shaft subjected to a torque is a. dtrectly proponional to the polar

ｾ ｭｯｭ･ｮｴ＠ l'lf inertia and to ｴｬｴｾ＠ dlsUUlce ofthe point from the a.'Cis

b directly proportion to the ltppli ed torque and inversely proportion to the polar moment of inertia

c. dirc.-dly proportional to the applied torque IUld polar mom"nt oriucrtia

d. inversely proportion to t.he applied rorque and the polar moment of inertia

A solid thick cylinder is subjected to ao external hydrosuotic pressure p The state of stress in the marerlal of tile cylinder ls repre.;ented as

w -Q-p

(b) -9-p www.examrace.com

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36

37

38

{c) I

(d) -' p -o:p -An upen-coiled helical sprlllg of mean

diameter D, number of coils N and wrre diameter d is subjected to an axlal three P The wire of the spring is subjected to a. dit-ect shear unly b combined sMat and bending, ani y c combined sbc;u'. bending and twisting tl. combined shear and twlsting only Mutch List 1 witJJ Us! U u.nd select the C<>rrec\ answer Ul>i n,g 1he code.s gtven below the lists' 'List I (Property) i\ . Tensile streng1h B. Impact strength C .Bending strength D Fatiguestnmgth List 0 Ｈｔ･ｾｴ ｬ ｮｧ＠ Machine) I. Rotating Bending Machine 2 Three-Point Loading Machine J , Universal Testing Machine 4, lzod ｔ･ｳｴ ｬ ｮｧｍ｡ｾｨ ｩ ｮ･＠

C<xles;

a. b. c. d

A 4 3 2 J

B 3 1 I 4

c 1

4

D I ｾ＠

3 t

Thrust Ioree will increase with the ｩ ｮ｣ｲ･｡ｾ･＠il l

a. side cutting edge angle b_ loot noseiadius c rakeangle d. end cutting. edge angle lo an onho&ollal cuu1ng, the depth of eut is halved :1nd the feed rate ｩ ｾ＠ doubled, If the chip rhickness rario is ｵｮ｡ｦｦｾ｣ｴ･､＠ with the changed etllring conditions, the actual chip l.hiclwess wi II be a doubled b. halved c. ｱｾ｡､ｲｵｰｬ｣､＠

d, unchanged In a slngle po1nt turn ing operadon wtch a cemented carbide and steel combinatio•1 haviog a Taylor exponent. of ().25_ if llle

S u( I .I cqtring speed is halved, then the tool life will btc(Jnte ｾＭ hall' b. two ti mes c, eigltllimes d, sixteen time!>

40 Slze ｯｦｾ＠ sltapcrls giv•n by a. stroke length b. motor power c. wcigl\l of the machlne d. lllble size

41. A drill blt of 20 mm ､ｩ｡ｭｾｴ･ｲ＠ rotating at SOO rpm wi th a feed rate of 0 2. m mfrevolution is used to dn II a through-hole in a t-4S plate of 20 mnt Utickoess. ｔｨｾ＠ ､ｾｰｴｬｴ＠ of cut i tt tbl;, ､ｲｩｬｬｩｯｾ＠ operatiuu ls a. I ()() mm b. 20mm c. IOmm d. 0,2 ntnl

-t2 Match ｬＮｩｾ＠ I with l.is1 II ｡ｮｾ＠ select the correct answer using the codes given below l.he lists: List I (Material/pan) A_ Ductile irou B. Mall eable iron C Rall steel joi ttts D. White cast iro.n List II (Technigues) '1 . Inoculation 2. Chilled 3. Annealing 4. Thermil welding 5. lsothennnl nnnealing Codes:

A B C D 8; 1 3 ｾ＠ 2 b. 5 J 2 c, ｾ＠ 1 q 5 d . I ｾ＠ 2 3

-tJ lu bi3Uki og O!)eratiol't l.he cleu;mce provided is a. 5()% on pUnch and 50% on die b. l} n die c. on ptm•h d tnt di.e or punch depending upon

designer's choice -!4. Consider the toll owing states of stress

1. Compessr mess in flanse. 2 Tensile stress in the w111l J. Tensile stress in the boMom pan

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During dr3wlng openuion. the !<\AI¢< of stress in L-up wpuld incluCie 11. I nnd 2 b. J ond 3 .... 2 :md 3 d. L. 2 •nd 3

45, lb<> li tllowing uperaH<ms :ore perfunned while ｊ＾ｲｾｰ ｲｩ ｮ Ａｴ＠ the ｢ｩｬｬ･ｴ ｾ＠ for c;o<IJ'lJl;ion process 1. Alkaliue eleo•ung. l . ｬ＾ｨ ｯｾ ｰｨ｡ｴ ･＠ oooting, 3. Pitkling. -1. ｌｵ｢ｲｩ｣Ｚｾｴｩｮ ｧ＠ witlt ｲ･［Ｌｾ ｕ ｶ･＠ soap. ·ntc: cu'''""LNcquencc nfthcsc tll'ct.<tionM is ... 3, 1. -1. 2 h. 1.3. 2. -1 c.. Ｑ Ｎ ＳＮ ｾ ＮＲ＠

cL 3. 1.2.-1 -lC.. Which one of the foUowing techniques it

w: cd for determinin g allo\Vilm: cs in limo study'/ n. AIX.'<:]ll;lnce samplinl! b. ｌｩ ｮ ｣Ｚ ｾｲ＠ rcgrcS!I-lQn c. Pcrformrute" o•Ming d. \Vorb nmpling

47 Match LtSt I with List Ll and select the correct answef using lhe codes given below the lists: List! (lndustri nl 11robhnn) 1\. Facwry lnyout .nov¢mcnl of ｷｾｾｲｫ ｣ｲＸ＠

B. Facto!') layout rnC)vement <tfmnteriols C. Workplace laycml 0 , Grmg wol'k list U (ApJ>ropriate tcclloiqu-'.) I. Multipl e activity ーｲｯ ｣ｾ ｳ＠ cbiitl 2. String ､ ｩＱｬ ｾｭ＠

J. Fnm.s -l. Tw o-hauded llro=s cbatt 5. FI0\1 diugram Cudll8.

i\ B C D a. I 4 2 ｾ＠

b. 2 5 ｾ＠ I c, 4 J 2 3 d. 1 5 ｾ＠ 2

48. From tl1e point of rnotiun economy it b prel'er3hl" to move n. bOth h:onds in the ｾ､ ｬｴｬ ｣＠ dlrectio1n b. oight hand fir st and then the ｬ ｾ＾ ｮ＠ hand c.. ｯ ｮｬ ｾ ﾷ＠ 11uc bi1nd at • lime cL both bnnds in oppo, ite directions

49. ｆＧｲ＼ ｯ ､ｵ ｣ｕｾｮ＠ co•t p"r unit can be rcdhc<;d by

j ().

51.

$2.

53.

54.

6 ul IJ •· ptoduoing more witl1 incrco•ed input$ b. produ.,ing more wlrh 1he .. me inputs c, eliminnting idle ume d .. n1iu.imizing te!lour1&.W wash.: Moloh Lijt I wiih L i!)l IT and .1elei.:l the com:ct ｵｮｳ ｷｾ ＮＮＭ us1ns tl•c ｑｏ ､ ｾ＠ giv"1! helow the ll >ts:" Lht r A. Sllll isli c B. MTM C. Slop Watch 0 , ｍ ｾｮ＠ Machine Chan E. Slllnillml 'fim.: Li<L II L Pcrlormon.:eR•ting 2. M otion Study 3. Work Measuremml 4. \Vrork Samrling Codes:

h.

b c, d.

B 3 2 • ·'

c 3

u 2 2 I 2

E 1 1 2 I

l11o varioblc coot per unit ••soci•tcd with automated ass!:lnhly line (VA ), «!Uular manuracturing l VBJ und j ob •hop Ｑ Ｑ ｭ､ｵ｣ｬｬｵｮＨ ｖｾＩ Ｎ ｷｯｬｬ＠ ｢｣ Ｎ ｾ ｵ ｣ ｨ＠ that. •· VA VH• Vc b. ｖｾ Ｚｯ＠ V.., Ve "· Va \io " VA d. ｖ ｲｾ ｖａ Ｍ ｖｂ＠

'J'() avoid ･ Ｎ ｾｴﾢｳｦ＼ ｩ ｶｯ＠ multiplicallom uf fnciliti., the l.ryout pru(errcd is • · product lll yout b. group lnyoDI c. <l>lic loyoul d. process layout For moving ｭｵｴ ｬｬｬｩ ｊｾ＠ iu •·urying paths, IJH> molerial ｨｾｮ､ｬｩｮ ｧ＠ ..quip.ncnl ｴＮｬｴｾｴ＠ is nQI suitihle 1• a.. cram: b. conVc)'Or

" ' truck d. hand trolley Which of lho follow ing cluraotm-isli;:s on! more •mp<rrtanl in tbe equiptnent selected for nus.s pruduetion sbops?

l. " "''' notpul 2.. Low 1r10ting Ｍ ｾ＠3 I ,oil lnhQur .:ost. 4. Ver.;alitity.

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56

57

58

Select the con'ecl answer usmg Lhe codes gi vcn below C<X(es a,Jand3 b. :! lllld 3 c. 3 Slld 4 d. 2and4 Wh1ch one of the followmg charts gaves Simultaneously, mfonnallon about the prOj,'Tess of work and machme loadmg? a Process chart b.. Machine load t\bart c Man-machine chan d G1lnrt dmrt Which one of the foJiowang pairs IS net correc1ly mstcbed1 a ｓｐｔｒ ｌ ｾ･＠ .. ______ JaUllessoaUjobs b EDD Rule . lawness

tmmuniZCUlon o Johnson's RulcO .. two machine

sequencing d FIFO Rule , . faTmi:ss to all jobs The nel work done for the closed cycJe shown m the given pressure-volume diagram_ tS

Ｐ ｯｾｾ Ｎ ｾ Ｒ ｾｾＴｾｾＶＭｌｾ ｡ＭＭＭ

volume mJ

a 600 kN;n b. 700kN-m c 900kN·m d IOOOkN-m l'be followmJl are examples of some inleoslw and exte11sive propenics; L Presslll'l! 2 Temperature .3 Volume 4 Velocity 5 . Hl.cctoc cbalge 6 Maglloltzatlon 7. V ISCOslty

8 Potenunl energy. ｖＮｾｵ｣ ｢＠ ooe oJ the foUowing sets gives the ｣ｾ＾ｲｲ･｣ ｬ＠ comh•na11ons of intonsi,>e ttnd ･Ｎｾ･ｮｳｴｶ･ｰｲｯｰ･ｲｴｩ･ｳ＿＠

Intensive El'tcnsivc

59.

60.

61

61.

'? ot H a. 1.2.3. 4 5.6. 7.8 b. I, 1. 5, 7 2. 4, 6, 8 c. 1, 2.. 4, 1 3, s. G. ·s d. 2, 3T 6, 8 I, 4, :5, I A new temperature scale ua degrees 'N is to be dellnNl The boiling and freezing pOtnt$ on this scale nre 400"!'1 and I 00"1\ respectwely What w11l be the readmg on new scale corresponding to 60"C? a. 120"N b I SO" N c. no• N d 2so• N If M heat eugane gtves uu OUlJlUl of 3 kW when I he '"Pill IS I 0,000 J/s , then the lhennal efficiency of the engine will be a 20% b 30% c. 70% d 76 7% A hem engme 1s supphed with 250 kJ/s of beat at a co1.1Siam fiXed temperature of 227"(' rhe heal is ｲ･ｪｴｾｴｾ､＠ Ul 27"C The cycle 1s reversible. tf d1e umaunl of heal !'ejected is a 2731d fs b 200 kJfs c. ISO kJ/s d. 150 kJ/s Winch one of the lollmvlll£, I'V -T diagrams con·ecl.l>• rep•·esents iJ1at of an

: "' ｾ ﾷ＠ .. 1 "--

T

(bl P\1 ｾ＠

T

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65

66.

(d) PI/

T 1n the temperatw·ercuU'Opy diagrnru of a vapour shown in rhe given figure. the them10dynnmic process showo by the dotted line A8 reJ.lresents

,_ TS 1 I ＭｾＭr; B I/

S(EnbopoA

a. hyperbolic expansion b free expansion c constant volume ･ｸｰ｡ｮＮｾｩｯｮ＠d polytrophic ｾｸｰ｡ｮｳ ｩ ｯｮ＠

The loss of available energy associated with the transfer of I uOO kJ of beat t'rt'Jm a \!Utl$lunb tempcrallJrC syS\er1l at 6QI) K tu another ttl· 400 K when tlte envir<'ltnt<mtal Lemperamre is 300 K is a J lio.67 kJ b. 250 kJ c. 500'kl d. 750kJ Wbicb one of the followin!!, pairs best expresses a relationshi11 similar to tl)at expressed in the pair 'pressure-volume tor a dtermodynamlc system undeq!oing o pr!)cess? a.. .EnthalJ)y-entropy b Pressure- enthalpy c;. Pressure - temperature d. Temperature-l'ntropy In a reversible cycle, Lbe source teprperature is 22rc and the sink temperature is 27•(' Tire maximum available work for a heat input of 100 k.i 'Vill be a. 100 kJ IJ 60kJ c_ 40 kJ d 88 kJ Consider th" foll owing ｾ ｴ ｡ ｴ ･ｭ･ ｮ ｩｓ＠

regardirm superlteating in Rartklne Cycles I. It reduces the specific steam

con.swupUon .

68.

69.

'10

lso( l" 2. lt increases the dryness traction or

steam at lite exltaust fot the. same value of condenser presStJrc

3 It reduces the cycle efficiency Of these statemcnLq tt, I <tnd Z are correct b 1 and 3 Ut'\!. correct c. I and ::! are ｣ｯｲｲ･ｾｩ＠d. I 2 and 3 are correct 0 68, A superheat Rankine Cycle is shown i D the given TS diagram Staning I rom the feed jump. the fluid llo\v up 10 the boilet· ｾｸｩｴ＠ is reprusrote.d by smt.-.tlne.

T

t

a ABCD b_ BCD£ c. ABDEFA d ABCDE The correct sequence of vapour compresSion (VC), vapOtlf absorption (VA) and ｾｴ･｡ｭ＠ ejector (SE) refrigemtion cycles in lncreasiJtg order of the C,O.P is a. VC. VA.SE b VA, SE, Vt c, SE, VC'. VA d. SE, VA, VC Match List 1 whb Ust I[ and select the correct answer osing the codes given below the 1\sts; List r ·"'- l'wo conStant Volumes unrl twel

ｾ､ｩ｡｢｡ｴｩ｣ｳ＠

B Two cotJstant pressures ｾｮ｡＠ two ndiabatics

C l'wo constanJ voluwes aud two ｩｳｯｴｬ ｾｮｮ｡ｬｳ＠

0 , fwo constant pressures and lwo iso!hennals

ListD I ｆＮｲｩ｣ｳｳｑｾ＠

2 Sterl ing J Joule 4 Otto. 5. Codes.

A B a 3 4

c D I

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72.

73

74

75

b, J 4 I 2 c 4 3 I 2

d 4 3 2 I A nuclear reactor is ｳｾｩ､＠ to be "criti cal" 1vheu IJJe neuJrou pQpulation in the react(lr core is a, ra·pidly ｴ ｮ ｯｴ･｡ｾｩｮｧ＠ leading to the point

of' ex1Jlosion b decreasiog from th.especified value c. constant d. reduced to zero Consider the 1'oll owtng statements regardiug !he features of a Breeder reactor l It produces more fuel than it consumes 2. It converts fenile fuel into fisslle fuel . J It requires liquld sodium melal as

moderator, 4 It reqwres highly curlthecl fuel or

the-se ｳ ｬ ｾｴ･ｭ･ｯｩｳ＠

a. ., 2 and 3 are correct b I, 2 a11d ｾ＠ arc corret.-t c. I 3 and 4 are correct d :!. 3 and 4 are correc1 Which one of the foiiQiving indicates the correct order l tJ tbe p11th of tl ue ｧｾｳ Ｑ＠

a. Super-heater, economi.?.er, air prc-he.atcr. precipitator

b. Super-heater, CC(>Oomizer, precipitatot·, air pre-heater

c.. Supcr-hi.'ater, preclpi tator. economizer, air pre-heater

d. Super-heater, air pre-heater. cconomlwr, pr<-cipitator

Match List l with List 11 and select the currecL answer using the codes giveJl below tlie lists List I (Name of Steam Turbine) t\. De Laval Turbine B Curtis Turbine (' Parsons Turbine List 11 (tYJIC ol'Turbine) I Velocit)' compounded impulse turbine 2 Reaction turbine J Sitnple impulse tUrbine Codes

A B c a I J l b l I ｾ＠

c. 3 I 2 d. 3 2 l Tbe given fi gure represents pressure and vclod[y variauou for a

76.

77

78.

79

!I uf 11

ｾｐｴｵＮ ｾ ＢＭ

t [\_v...- o...,.

ｾ＠ \lo ｾｾｊＩｊ｟｟＠1-- ·r ._

Ｍ ﾷｾ＠ I

a. reae1ion type rurbi ne b velocity Compounded impulse turbine c. Pressure velochy compounded impulse.

turbine d. pressure compounded impulse turbine In a reaction turbine, the enthalpy drop in the ｦｩＮｾｬＧｬｬ＠ blade 1·ing js 50 kJ per kg aud llte ･ ｾｴｨ ｡ｬｰｹ＠ drop in the moving, blnde dng is 2-:> .kJ per ｾ ｧ Ｌ＠ The degree of reaci1on 11f I he turbine is a. 66. 7"/o b. 50.0% c. 33.3%. d 1:)(1%

Match List l \\lith List n aud select ll te correc.L auswer usmg Lll.e CIJdes givetJ beiOWihC ｬｬｾｌ＼ｃ＠l: ist r (Variable are:J device.•)

A. ｾ ｮ･ｲ･｡ｳ･ｳ＠' .::::::::::-B. -> Pri ncreoses

__./"' ---c, -> Pr dw-cas<S

ｄ Ｎ ｾ＠ c!ecn:asl:s ---ｌｩｾ ｬ＠ II (Name of device) I. Surcrsanic nozzlH 2. Supersonic di ffuscr 3 Rayleigh .flow device 4, Subsonic nt\zzll' 5 S\lhso>tlc diffuser Codes:

A ll C 0 a, 5 1 4 2 b. 5 4 3 1 a 2 4 I 3 IL 5 1 4 1 Symmetrical blading is used in a turbine when ｩｴｾ＠ dcb'l'ec of teneri on is •. 10% b. 50% c. 75% d 100% The charat:terislics of a pump -nre as ·shown in U1e given ligure. Based. on this figure,

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so.

SJ

82.

tn.1rch List I with LisL 11 and choose the COI'I'ect answer using rbc codes given betov. the lists.

ｾＺ＠

1 Ust I A, Curve P B. CurveQ C Cur\'e R Ustll L Discharge versus bead 2. Head versus discharge J . Power versus discharge 4 Efficiency versus discharge Codes.

A B C a, 2 4 J b 3 2 (l 4 3 d -1 3 I If tl1e mllXJmum temperatut•c is Tl and mmin 1u1u ICmperar: urc is 'fh Lben du! optimum pressure ra1io in a gas turbine is QJVCO by . •. ··.=(i r b t =( r, )'h

r 7j

r, ｾ＠ [1, J• ｾＧ Ｇ＠.1, . _,,

d. r ｾ Ｈ ＡＮＱＮ ＩＭ,. 7;

Cooling tower in a steam power ｾＱ ｡ｴ ｩｯｮ＠ is a device for a. eondensing the steam into water b. cooling the e'{laust gases coming out

of the boiler e I educing WC temperature of

suporhea\lld s1cau1 d ｲ ｾ､ｵｯｩ ｮ ｧ＠ ｣ｨｾ＠ (emperacure of cooling

water used co coodeuscr A reversible engine has ideal thermal efl-iaiency of 30'/a. When it is used as a refrigerating machine 1vilh all other

83

S4

SS,

JIJ ur 14 conditions unchanged. the coefficlem of performance will he a. JJJ b. 3.00 c. 2J3 d. 1.33 Wbicb of ｉｬ ｬｾ＠ l'ollowlug are the reasons for the volumel'!ic efficiency of reciprocating compressor being less than IQOo/o'l I . Deviations from isentropic process. 2 Pressure drop across the ｶｾ ｊ ｶ･ｳ Ｎ＠

J, Superheating in compressor 4. Cl.earauce volume S. Deviations from i sothennal process. () Leakages, Select the correct ans,ver from the codes given bel ow Codes. a. I. 2. 3 aud 5 b. 2. 3.4 and 5 c. 1.4, 51Uld 6 d. 2. J, 4 and 6 The presence or air iu acondenset a. increase 1 he pressttre f n the condenser

and decreases the condensing coeffi cient

b. decreases the pt-essure in the condenser but increases tbe condensing coefficient

c. increases the pressure io the condense• 8> well as tlte cnudcosing ｣＼ｾ･ｩｔｩ｣ｬ･ ｮ ｴ＠

d decreases the pressure in the condenser a,s well as lhe condensing coefticienr

Match l.ist l with List n and select the correct answer using the codes given below Ute ｬｬｾｴｳ Ｚ＠

List I (Material} A Glass wool B ａｲｮｮｷｴｴｩｾ＠

C G. I. sheet D Pol yurethanc List 11 (l'urposc/ajlplicallon) I. Cold Storage 2 Domestic ｒ｣ｦｲｩｧ｣ｾ｡ｴｯｲｳ＠J . Insulation ·1. Ducting Codes.

A B C 0 a. J 4 .2 b 2 3 4 c 3• 4 2 d. J I 2 4

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86

ｾＸ Ｎ＠

It!).

Two ｾｴｲ｣ｾｭ＠ of moil!! afr '1' ｾｮ､＠ ·2· mt..: together to give: nnoth<r $tream of Ul\$nturatcd alr '3'. I..Ct 'm' denote the rule uf Willi ＱＱＱｾＵ＠ O.ow of moist air. •m. · denote the 111tc of mas• ll ow (•f nsoodated 11 ater Va(X)ur. '«'' denote tho !<pocitic humidity nJlll' t ' tl1e ｬ･ｭｰｾｲ｡ｴｵｲ･＠ 0( ｾ＠

strcslll. Tbctt ' l.<' tha lCtuJ"'ftllurc ｮｦｴｴ｣ｴｾｭ＠-3' will be

.._ ( m1 m .. ) ｴ［ Ｑ ｾ＠ ( Ｂ ｾ＠ m_._ )fV.-f Ａｮｾ Ｍ ｭ＠ )<Cl;

b (m,-111,,)1 - (m, -111,.,)1,

(m -m,.,) c. w,L, t- ru11.,.

ｾ＠

U.. Ｂｾﾫ ｊＬｉ＠ .. 1 m .. ｯ ｾｌ＠m1ro1

fn CQ<Jl and dciwmidif)• • ｾｬｲＧｴＺＺｬ ｕｉ＠ Qf1 111<)1$1 ,IU', it tnUilt be passed ovct l!tc coil ut a tom per ｡ｭ ｾ＠u. which 1 i betweon tb" dry hoilb ;om) "'"'

hulb tcmporaturo CJf Ote incomi.op atrc•m

b. whicb lies botwccn lhe wot bulb ond dew poim ll:mper;olnre orlhe incoming slream

ll.. 11 hicit js lower than tho d<l\1 point lempcruturo of lho ineomfng strt."llm

d of odiabatic ••luration of incoming stream

Cunsider the ft) llowing ｾ ｴ｡ｴ･ｯｮ＼ＺＢｮｴ ｾ Ｎ＠

I. Dew puint i> re.'!cbed by i!QOiin& ｾ｛ｲ｡ｴ＠ｾｯｬｬｦｬ｡ ｮ ｬ＠ moisture cont,'lll

2, Wet both temperatun: ch:on&"" b) addition of moostnr<' ul ｣ｯ ｮｾ ｴ｡ｮｬ＠

<:nthalpy. 3. .For <>lumtod air. lhc dry bulb

temperature, wet bulb temperature and dew (l(ltnt ao•c O•c-<>me.

ｾ Ｎ＠ DchuntidlfiCDtion of uir Is >chiwed b heating .

t l flhele statement. :1 I Ｚｾｮ､＠ 3 are:co rre.cl b. I nud 2 ｡ ｾ＠ e<)n'cct c. 3 and -1 arc "Qrh:ct d. 3 illoo u is cOD'cct

Wluch one of lhe following stntemeniS ｾｾ＠correct? n, Tite sensible beat gain JS due to the

dilr<tCue<: iu bumidlty

llull4 b. Tiot: la!enl !teat gnin Is due to the

tempcrnture difference. between the trcsh air und the a it iro splice

.:. Tioe heat ｧｾｩｮ＠ through Ute wuU$ of ､ｾｊ＼＾ｉＮＤ＠ <:Ql'l)•lng conditioned air through nnconditioneu Ａ＼ｰ｡ｾ＾･＠ in the butlding ｾ､ ｴ ｬｾ＠ tc1thc •..:nSiblc hc11t gnin

d. Mnximum ll••l gain to 3 building pc.,urs \hrougll wall•

!>O. for air-conditioning tho operation theatre in a hospital, the percentage of outsiJ.e air in ｾＢ＠ :Ur l<uppliod ,. a. zero b. 20 c. so d. l(ld

9 1. The vertical fa•"" ou a subont:l'god ｾ ｴ｜ｊＧ｜Ｇｯ､＠surface is ettunl to \he a, force o.n the ''ertic:ol projection nf the

L'Uf\•ed ｾ ｵｴｦ｡ ＮＺ･＠

b. force on tl1e horizontal projection of tbe>CUI'VCd SUJUCC

e. weight of I he liquid venicall I' obove the c:uf\'ed surface ·

d. product oJf the pressure at. I he centroid and ｴｨｾ＠ • ren tlf the curved <urfoce

92 ｃ ｶｯｾ＾ｩ､ ｾ ｲ＠ the following • tllteoncnt• regnrdiqg ｾ＠ plane •reo >wbmerged m a liquul: I. The tu\41 for"" 'L< ll lc pnodu"t (If

i<pccili c weight 11f the Uquid, the area snd the depth of it' ce111roid.

2. l'he total force is the product of the are. anJ ｕｴ ｾ＠ pr.,;t.urc: ｡ ｴ ｬｾ＠ ""ntroid.

or tltcso slalcnlcnts a-. 1 alo ne is ｣ｯ ｾ･ ｴ＠

b. 2 alone ill corn:<:t c. br>lh I and 2 are fall;c d. both I and 2 nre corwct;

93. A vtttical dock gale 2.mcter wid.: ,..,main.\. m poRifitm duo to horizontal force afwalcr on Dnc side. 'rhe sate weigh.• 800 kg nnd jusl starts ｾ ｬ ｩ､ｩｵｧ＠ down when the depth of water up to UJc botto111 of tltc g•Lc ､･ｴＺｲ ｾ ＺｬＡｬ ｴ［ｓ＠ Lo 4 m.otwos, J'hen U1e c.oefli .cienl of fricti on l!etween dock gote •nd dock wall " ill b • • . 0.5 b. 0.2 c, tJ.1)5

d. 0.02

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94

95

96

97

98

Tlte preswre gauge reading ba ml'tet of water column shown in ｾｴｴＧ＠ given figure will be

ｾ＠ I Il l"" -;: 1. w... r

The bUt>}'ant force noting <In a flonting body passes through the a. metacentre ofthe body b. cemre of gravity of lhe body c. centroid of volume of the body d. cemroid of' the displaced volume Which ona of the foll owing sers of conditions clearly applies to an ideaJ flu id1 !1- Viscous aod oompressible· b, Non-viscous and incompressible c. Non-viscous and compressible d Viscous :and incompressible lu b Newtonian llui<l , laminar flo\\ between two l)arallel plntes, dte rntio (1) between the ｳ ｨ ･｡ｲｳｾ＠ and rate or shear strain is given by

d' u ｾ＠ p t.fy'

(lu b p <(I

(till JJ c. II-t.Q•

d ｾｴｾＺ ｲ＠l'ipe I brnnch to three pi pes as shoW11 in the given figure. The ｡ｲ･ｮｾ＾＠ and correspondiug velocities al'e as givl'n in the foll owing table,

p;,., l, 2. l . 4,

so 10 V, tO 10 LS 20 10

99

I UO.

IOl

102

103

llu t 14

The value uF V, in om per second \IIlli be ｾ Ｇ＠ "15 b. 20 c, ](I

d. 35 Tile energy IQss between sections (1) and (2) oftbe pipl' sbown in the given figure is

I

' ' l • . "• . ｵＮＺｾＭｳｾｾ＠ l

• - w ... " .;.,. Pz• 3.4 ｾａｮ｜Ｚ＠v, ... ｯ Ｎ ｡ Ｚ ｭｾＬ＠ 1

' a. I 276l1!-m b. 1,00 kg-m c 0-724 ｾｧＮＭ ｭ＠

d. O, IS kg-m Fat· lluw tluough a hot1tonUJl ｰｩｰｾ＼Ｌ＠ Ute pt·essure gradient dp/dx in the now dj recdon is a. -v('

b I c. zero d -ve In a pipe flow, the head lost due to fiiction Is 6m If 1he power transmil1ed through tJte pipe has to be tJ1e maximum, tben !he total head at lite ittlet or the pi11e will have tO be maintained al a. ,16 m b. 30m c. 24m d. 18m The lower critical Reynolds number for a pipe tlow is a. different for different fla il s b. the Reyoolds number at wblcb the

ｬ ｾｭｩｮ｡Ｎｲ＠ flow chnnges to (\lrbulent flow c. more tJtan 2000 d. the leasl Reynolds uumbcr ever

ｏ ｾ｛｡ ｩｮ･､＠ fOr lantinar Oow Assertion (A) The meeh&nism ｾｨｯｷｮ＠ In the given figure bas ｲｮｱ｢ｩｬｩ ｾ＠

Reason (R) A llle<Jhanism is mobile When itlius a ｾｩｮｧ ｬ ｾ､･ｧｲ･･＠ ｦｲ･ｾ､ｯｭ＠

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u Doth A ｾｮ､＠ R nre IJ\ltr ｾｮ､＠ R u Ute Cllrrect eX1llanati<m of A

b, Both A ﾷｾ､＠ R are true l:luJ R ｾ＠ not > ｉＡｊＬｬｬＧｬＧ｣ｏ ｉ ｉ［ＮＧＨｪｾ ｬﾷｮｬｬ ｯｮ＠ r, r A

.:. A is true bul R I,; fabc d. A is fills• hut R ｩｾ＠ lntB

1().1, ａＦｾ･ｲｴｩｏｮ＠ (.-\); A t1ywhcel i$ all•ched 141 d punehing ーｲｯｾｳ＠ so ［ｾ ｳ＠ tu redtoc.e its speed flu ctuation•. ｒ･Ｚｾｳｯｮ＠ (R)i The Oywhcc:l alores energy when'" spe.ed in .:.-eases .o. Roth A >nd R nrc: tme anti R is Lh.:

con·ett <XI> lana lion IJf A b .Doth A :ouJ R on: ttue but R ｩ ｾ＠ «t>t o

correct ･ｩ＼ｊＩｉｾ ｮｮｴｩ Ｈｯ ｮ＠ of A 1!. A istnte ｾｵｴ＠ R ｾ＠ (aloe d. A is fob.: but R is true

1(15. As!.crtion (A): 'The outomntic ll'•lli c con\iol i.• nn Op<.'11·1oop system, Reasoo (Rl: The ii•Jollt l$ ｩ ｮｾ･ｰ･ｭｬ･ｮｴ＠ (of

the outpuL n. Butlt A aull R arc tme ami R is the

ｾｏｮ Ｑ ｴ｣ｴ＠ e.spl:uwliun oi"-A h. Bolb A and R ore true bul R ｾｾ＠ not ｾ＠

ｾｴｩｮＧ｣｣ｬ＠ el<Jllanati<m of A ｾ Ｍ A is true but Ris l'•lse d. A i> ｦ ｯｬｳｾ＠ hut R is tru.;

106. A..scrtimo (A): .M.my thucs Jlte ncigiiJ. ｯ ｦｾ＠hody is treaced 1• negllgiblo: whil" .:aleulaliog total fol1les aQting on iL ReMon (R): Thehutly i> \\eighties.\. n. Bulb A ｾ ｮ､＠ R ｾｲ･＠ tru,. ｾｮ､＠ R ;, lbe

C4:>rrect explnnntlon of b. Both A >nd R nre 1rue but R i• nrot •

ｾｲｲ･･ｴ＠ ･ｸｶｬｮｾ ｴｩ ｵｾ＠ or A 1!. A i.!l truc but RiB f-a lie d, A is.fiolJ<e bul R is true

107. As.•ertion (1-\) : An onoreasc in d"Jlth ofctn sbortens the tool life. Reasmt (R): r ｮ｣ｲ･ＺＱｳｾ＠ in dqllh Qf cvt ｧｩｶ･ｾ＼＠rise w relalivcl) •mnU inore:u;e in 1001 lc:mperamrc. u, Both ;.\ and R a.re tn;oe and I{ " !he

C<Jn'Cct "·':PI alll!1j on o I' 1\ h. Butb A and R are b ｵ ｾ＠ bur R is nm ｾ＠

con-ect CXJ>Ianation of A 0:. A is true bu! R ;, false d. !\is ｦ｡ ｬ ｾ･｢ｵ ｬ＠ R i• true

108. A•sertJou (!\)! A pattern is made ex3o:.Uy simi!Jlr to lit e ーｾｲｴ＠ to ｢ｾ＠ CML ｒ｣ｨｾｬｯｮ＠ (R): Pullem ｩ ｾ＠ U! e<l t</ onok" tho mllHid c:l\ity f<>r pouring in ｭ ｾ ｬｴ･ｮ＠ mo:t;ol lor casting.

13 uf IJ a. Bolh 1\ and R lite true nnd R ill tfte

ｾｩｬｲｲ･ｴｬ＠ explanation of A b. Both A and R arc: true but R ｩｾ＠ nr>t a

OOt'r.:<lt C)(pluuntion Qf A e. A is lruct but R o< false d. A is false but ｾ＠ is true

I ll<J. Ass.:ninn I A); In lli_gh •pe<d ｳｴｾ･ｬｳＮ＠

aUoyiog elements lutlgst.:n. clttumluno iUld vunodiwu nro nddcd to make th.om suil<oblu to work at higher cuuiol£ Rpeo:ds Lhon tool ｳｴ･･ｬｾ＠ !II low alloy ｾｊ･ＮＭ ｬ ｳ Ｌ＠

Rea•on flU : YnnaJium adds tv ll 1e JILOp<rly u( red hordocSS lOud tUO!(\IlL'tl umJ chromium add lo loi&h we:or n."Sisun= a. HoUt A nod R are lJUe And R iS- the

el)m:ct <:);plaMtion uf A b. UoU1 1\ and R are u·uc bul R ｩｾ＠ owl a

＼Ａｏｲｲ･ｾｬ＠ explonation Of A ｾ Ｎ＠ ｾ ｾ＠ i• lrue but R ｩｾ＠ fall<: d. A is ｬ ｾＱｦｳ･＠ but R is tru"

110. Assertion (A); If neuuool Oame is used in OX)'•acctylone welding, bot.b ｯｸｹｾｯｯ＠ md acetylene ｾｹｬｩｮ､･ｮ［＠ of 10me c;opadty will he en1p1ied ollhe same lime, Reason (R). Neult'31 flame u•es et1ual illl10UOL5 bf oxygen ood 3Ct.'tylene. 11. Doth A rutd R ore h'IN und R Is the

cQrrect ･ｾｬｯｮ｡ｴｩｯｮ＠ of A h. BoUJ A and R are true but R ;, nnl •

oom:d ･ＩＨｰ ｬｾｊｬｴｬｴ ｩｯｮ＠ nf A e. 4 is ttuo but R is fllhc d. A IS fa be bul R is true

II I Assertion (A): In a mul!isided an!Qmat, the luo tel is inde><.o:<J lo engage C3ch u( t!Je outlin_g tools moun led on it. Reason fU): 1"um:L os a noullopla tool holder so !hot the machining can be conltnue.d willt <:•clt tool witlooultlte 11ee<l lu change Lite> tool. •- Bot11 A rutd R 4N lfl" ' ond R is the

Nrrect ･ｾｰｬｮｮｴｴｴｩｯｮ＠ of A h. Bolh A. and R. art: lr\IC bul R is onl •

.mrroct ｃＩＨｰ ｬｾｭｬｩ ｵｮ＠ <If A .:. ._\ ｩ ｾ＠ truu but R ｩｾ＠ f•hc d. . \ .is false bur R il true

112. Assertion (A): 'l'he open cy-cle ｉｉ＾Ｇｾ＠ turbines are prefen:ed over dosed cyole when tl 1l0

ｾＩＭＧｾ＠ is :u.r... ltcnson (R): Titc e>q>anJion of combustion products can ｾＱｬＭＮＺ＠ place up lo atmospheric pr'essure.. a. Both A ond R :u'l: tlll 0 and R IS UJe

l'Om:ct ""J'Iauntlon o-f A

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b. Both A .'tnd R are true but R is QOI ｾ＠ctJrrecl e>lplnnotlon of A

c. A is true but R i$ ｴ｡ｬｾＮＺ＠0. A is false but R i& It u"

113. Allstrtiou (A): In Mnllioo• c:hort for • tciiJll.. the constant pressure Unes are Rlr:t.ighl lines 1n wet region, Reason rR); 1'he slope of toustant pt'CSsur< lini:s in wet region is e<junllb T. n, Both A lltld R on: true. and R ｌｾ＠ the

com:ct ･［ｾ［Ｑｬｬｬｬｴｬ｡ｴＱＰｮ＠ of A h. Both A and R ftre true hut R is ntol a

correct ＢＭｾｊｬｬｬｬｬＡｏｬｩｯｮ＠ •lf A ｾ Ｎ＠ A is true but R i!l ｦｯｴＵｾ＠d A is fal;e but R is lrne

114 ａｳｾ･ｲｴｩｯｮ＠ (A): Temperature nnd pressure an:: su!Iici<lll 10 li.x, the slllte or ll ｨｾ ｯ ﾭ

ph3se system. Rea•on (R): 1\vo indcplllld•'Tll nnd ｩｮｴ･ｮｾｩｶ･＠ ｰｭｰ･ｲｴｬ･＾ｾ＠ are required to be known lo <lefine Uoe stale ol' 3 Jlut< substano<>. n. Both A and R arc: tJUc and R it tho

c.on·act ""l'lnnotion ot' A h. ,Bnl)o >. and R •n: true hut R i• nc1t •

ctJo-e;,t CNill an•lion uf A ｾ Ｎ＠ l \ is touc but Rill fulk e d. A is fulse but R i.; lrne

liS ASsenlon (A): In n convergent-diver&"''' 1101.7J.,_ one" sortie ｣ｯｮｾｩｬｩｯ ｮｳ＠ ore .,;t•blisbcd ot the l.llJ'oaL •uv lUl\Ount of reduction of pressure al the ... ｾｩｴ＠ 'viii not b« etre<:tivc In 1ncrt135ong the ilow ruta Reason. (R): 'Cbe t'educliun of upsu·ealn pressure:. caused by l.lus dopll<lioo of ｬＮｬｯｾ＾＠reservoir compensates- for the acceler:.tion nfflow due to lowenng of l:mck ーｲ･ｾｳｵｲ･ Ｎ＠

o. .!3oth A >lid R ore tnoe and R is the con·cct explnuution of A

b, Botl1 \ 4nd R ｾｲ｣＠ ll uu but R t. nut • correct explnnot1on of A

1:, A \s true bul R i• (lol•e d. A ｾ＠ ｬＧｵｬ ｾ｣＠ but R i; ttllb

116. Au"J'tion (A): Tbc ·st<:aru disclllltga through • nozzle con be inc...,.,•ed only after the pressure al throat ｡ｬｴｬｩｮｾ＠ • valu4 Cl(lllll w critll!ill pr.:55ure Reason (R): A milxUnUIU disc.hargu ,,. ohtama-d 011 thu critical pressure ｲｾｴ ｩｯＮＮ＠

o. Both .,\ and R arc true and R is the con·ect<:>qllorllltion oi'A

h. J)otb \ uud R ｯｲｾ＾＠ true but R t< not • con'Ccl c:<ploDllllon of A

ll nl lJ c. .'\ i• true but R ｾｾ＠ ｦＮｬｳ ｾ＠

d. .-\ i> r.,tse but R is true 117 As<ertioo (A): ｂ･ｾｯｳｯｮ＠ hailer ｩｾ＠ much

ligtu.-t Umn ulUoo· boilers. Re>Mlo (R): ｂｯｩｬｾｲ＠ pressure miscd to Ute critical P""'"W'" in Benson boiler pmnits domy ｾｷ｡ ｹｷｩ ｬｨ＠ ｾ ｴ ･｡ｭ＠ (separating) dnnns. a. Both A and R arb lrue and R is tire.

cot:=t s:.'<plonltli on o1 A b. Uoll1 1\ and R arc true but R 19 not a

correct explnnarfon ol A e.. A is true but R ｩｾ＠ l':olse d. A i> fioiNc ｾｩｬｬ＠ R is true

118. Asscttinn (A): On ｴｨｾ＠ psycbomotric elm'!, omn.stanl en tho lpy tines and cqn<lonl wet bulb tines ｾｲ･＠ t11e ｾ｡＠ me Reasbn (R): Foo the 83UI< w.:t bulb t.:mpo:roluro. Ute moisture ooni<!Ul remain.< co n.slanl a. Both A and R are tme nnd I< is the

"orrect expl>nntioo o.r A b. Uotl1 t\ and R arc true but R '" not •

correct e.xp.lnnation of 1\. C, A is true blll R ., ral<e d. A is I'Alsc but R ｩ ｾ＠ true

119 Assl:rlioo (A): 'J'u reduce. Uoe rolling motion of • •hip, tho met ･ ＼ｭｬｬＧｩ ｾ＠ height should he liJ'V l<o.1son (R.): Oecrease in mel centric height i:uco eas''S tb< ｲｩＡＡ｢ｬｵｯｾＺ＠ <;Ouplc. a. Both A and R ore ltuc and R Is Jbo

COIT\lCl ""]l lnnntion or A b Bolh 1\ •ml R :.re true but R ;. not a

correc1 "''plnnutio11 11r A ｾ Ｍ A os true bui R os false oL ;\ is fallic but R ｾ＠ lrue

120. In flo•v over lmmorscd bodl.,., Assmion (A); dmg can he ereated wilhon\ lift. Reason (R): lifl etlilDOL be ･ ｲ･Ｚｾ＠ ted wlill oul dng. u, Both A ""'I R nn: true ｾｮ､＠ R a the

wm:uL ｾｬｩｬｲｲｮｬｩｑｮ＠ or A b. Both A and R urc: true hut R ｩｾ＠ 1101 a

com:cl<>.'qllanntion oi' A c. A i• true bul R is ｦｬ ｾ｣＠

d. , \ kfal<e hu1 ｾ＠ i.J trne

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