Ies-mechanical-engineering-paper-1-2006.pdf

Consider I he lollowing stntemems: In order lo prcvcul detonation in n sparktgpition engine, U1c churge away lton1 ｴｨｾ＠ spark plug should have

<17.

｜ｾｬ｢｣＠

ｶ］ａｾ

om

b.

3. long ignicion delay Which of the swtemems given above is/are correct ? s. Only I b. Only 1

Ｇ＠

.c

c. v = -Ae'y + ltxt d. v = - Acl >;- lb·) For n c;;lcudy twt1..dbnc:msic•nul ｮ ｯｷ ｾ＠ tbc sCttlnr componencs ofthe velocity lield are V, = - 2x: V, = 2y, V . = 0. Whut ure the ｣ Ｐ ｭｲｯｮｾｩｓ＠ of acceleration ? o. a,. = 0, n, = 0

Only 3

d. I. 2 and 3

44.

b. u, = 4x. a, = 0

c. u, = 0. u, "' 4y d. a, = 4x, u, = 4y

--=EG=L:.........-/ The energy grude line (f.GL) tor steady

a, A pump

.e

b. A tlU'bin< c. A pnrtinlly closed valve rl, An nhn1pl expansion A compou11d pipeline ｣ｯｮｾｩｳｴ＠

.15.

ｩｮ ｳｴ

w

w w

50.

b. Only I and 2 c. On I)• 2 am! 3 d. I. 2 and 3 A l>eakcr of water is falling l'r\.>ely u•1dcr the influence of gruvlty. Point Fl is on the surlilce and poiLll {' l-; \'cnically below B near ｾ ｴ･＠ bottom ｯｦｾ＠ beaker. If P is ｾＱ･＠

prcssurc at pilint B and P tl1c prcssul'l! at point C.then "hich nne nflhc fi•ll•)wing is: COrT"CCl 'l

../1 : J

For irrota1ioual and incompn:ssiblc now. U1e velotity polemiul und su-e:m1 !unction are given by
a 'J

•r = 0. V2•t•:

0

ｾ Ｎ＠

a. On ly I aJ>d 3

whe,n pipt.'"s ore connccLcd in ｳｾ Ｎ ｲｩ｣ Ｄ｟＠ and is L, when connected in parnllcl. Whal is !he

d.

ｭｌ

correct?

pidces of idemical ｰｩ ｾｳＮ＠ The ･ｴｵｩｶＺｾ ｊ ･ｮ ＠ length of same ､ｩ｡ｭｾｴ｣ｲ＠ and same frictitm factor. for the compound pipeline is L. 1

h. 8 : I c. 2 : J

follo>Ving statements iu lluid Jlow:

3. A pmb line sho\\s the iusmnumcous positions of a number of particles. passlng ｾ｣ ｲｵｧｨ＠ a common point at some previous time insiJJms. Which of the stolcmcnls given nhovc nrc

of lwn

rutio of equivnlenl lengths Loll :? a. 32 : I

ｮｾ＠

I. A puth line is a lim: truceu by a single particle over n time inlcn•aL 1. A path line shows the ｰｯｳｩｴｮｾ＠ ｯｦｾＧ Ｂ＠ ｾ｡ ｭ ･＠ pat1idc:. at successive time

xa

m

now in a unifonn diameter pipe is shown above. Whicb of the l'ullll\\ lng items is contttioed in the b;lx ?

Consider U1e regarding a pa!h ｬｩ

ra

49.

46.

ｰｲｴ

component " o f velocity 1.' u. v :: ｴ｜･ ＢＭｾ＠

I, '""' temp<'rtllurc l. low dcosit)•

ｾ＠

ｩ ｮ ｣ｯｭ

of II

steady now, the velocity component u = Ae' ｩ ｾ＠ ()btaineu. What is the order

ce

43 .

c. (p,

ｾ＠

Pn = P1

b. Po < Pr

c. "" > 1\

7 o l 14

51.

56.

a. Would be stable

Wou ld be neutral Wou ld bc: unstable 1\tay or •n•y nor be •tnble 25 em long prlsmotic homogcneQus solid ｦｬ ｯ ｡ ｴｾ＠ in water wid1 its ｾｸｩｳ＠ verticnl and JO em projecting above water s urface. 1f th" snmu soJjd floats in son1c oil wiUl OXJS vcrticnl Jnd 5 em projecting above the liquid surface, what ;, lhe spedflc grnvily Qf thc oU ?

ce a. 4cni

b. 75cm c. 12 t111 d. lh'm

ra

• • (),6()

.c

b. c. d A

52

57.

m

b. 0.70 <;.. 0.75 d. 0.80

ｳ ｾ ﾷ Ｚｕｧｨ

ｴ＠ ｾ､ｧ･＠

1

xa

A semi-cin:ular plane area of diam
53.

55 kNm b. 41 kNm c. 55 kNm d. 82kNm A hori:z.onbll oil tnnk ;, in lhe ｾｨ ｡ｰ ｾ＠ of • cylinder ｷｾ ｨ＠ hemispherical end•. If il is exactly half full. what i• the ral!o of mngnitudc Cof lhc vertical C<Jmpon.t'Tll ilf rcsulto.nl hydrostati" tllfUSt on on" ht'flliBJlhoricnl end t.o, U1a1 of tl1c hmizonL1I component'/

the tube: 'I

w

b. gmm c.

S8.

w 55.

b.

d 3nt4 Tite A;tnnd!lrtl nluto"phoric prosl$UfC ｩ ｾｴ＠ 762 r»m of llg. At a specific loc,11ion, lhe ｴｨｩｾ＠

6(K) ｍｐｾ＠

c. 500 tv!Pn d. 250MPo.

4/(371)

IJ•J
When the JlresstJJ-e on 11 given mass of liquid is ｩｮ ｣ ｲ ｾ＾ｴﾫ＼＠ from 3.0 I\1Po to 3.5 MPa. the density of the ｬｩｾ､＠ incre.ucs fTom 500 kg'm' to 50 I kg/m . What is Ihe avernge va lue of bulk modulus of (h., liqujd over tJu.t given pressure runge '1

a. 700 lvfi' n

" · '2Jn b. n/2 ｾ Ｎ＠

10 m1rt

d. 12mm

w

54.

A vertical clean glass tuba of unifom1 bore is- ｵ ｾ･ ､ Ｌ＠ ｡ ｾ＠ a pie7..ometer to measnre the pressure o( liquid at> poinl The liquid bas • specific weight of 15 kN/m3 aud • ｳｵ ｲｦｾ｣＠ len.>1on of 0.06 N/m in coniMI 11 ilh a it. It' lor lhc: licWid. the JlngJe of w11L'cl ｾ＼ ｯ ｴｨ＠ g1<1$s i• £cro 3nil ｴｨｾ＠ capillary cisc in Uu: tube is not to 1::-;cccd 2 mnL whnl is the required minimum diome!Of' of a, 6 11111'1

.e

11.

piAco;, what does an 3bsolut" pJ'I:ssuro of 380 mm ufHg correspond to 'I -a, 320 mm of Hg vne-aum b. 382 of Hg vacuum c. 62 rom of llg vnouum d. 62 mm uf ｈｾｪ＠ !!•ugc A manometer is n1ade of a tube of uni fom1 boJ'I 30° lo the hori:z.onto l, Bolli nf ils limbs are open to ;•lmosphere and, initially. it is partl.v filled with 4 manometer liquid of •r ccilic w·•vity 1.25. If lhen nn >ddilional ,.,,hlme or 7.S em" or ""'er i• pc1ured in lite inclined tuhc. whal l1 Ott •·ise of tl1o monillc.u6 in lbc vcrtiClll luhe?

om

d. Insufficient int0nn.1tion to clhovo Inc liquid surface__, lbcn lhe cctuiJihrium

59.

A.-slll'lion (A) : Nozzle control guvcrnin.g tn reaction ste.am turbines. ｒ｣ＳｾＰｮ＠ (R) : fn l'u;&c.liou ｾ ｴ･｡ｭ＠ ｨｾｲ｢ ｩ ｭＺ ｳ Ｎ＠ rul l iorlmi•s icm nt'srenm must lake place.

cnnnol ba ｯ ｾ･､＠

posse-ss ｡ｾ＠

result of

3

its

mo.1croscopic

.e

w 63.

k'tllperntw·c i>;

brought "loser togetlrer and t11ermqnuclear attractive forces ｢ｾ｣ｯｭ･＠ greak.'1' at pNSSurcs aroLWd ｾ＠ 1\U>a.

•· ｂｯｾ＠

6S.

A and Rare individuaUy ll'llt: and RU. the cor:n:ut c: true but R is false d. A is false hul R is true Which one of the following is used to bring down the speed of .on impulse s1<'111ll turbine to pnactical limil-; •1

•· A cc'TltTifitg•l gownuJr b. Co•n1>ounding nf U1c turbine c A large Oywheel 66.

or

d. .\ senr box ｃｯｮ Ｎｾｴｩ､･ｲ＠ rhc IOllowing fiw :1 ｳｴ｣ＺＮＱｾ pnwer pllmt:

Ｑ＠ tlll1hine

I. Reduction in blade erosion. 2. lncrcasiJ ln turbine speed. 3. lncr.:asc iu specific output.

w

w

62.

｣＠

consjdemhly reduced, tho molecules >re

h. Both .-\ 3nil R :
d. A is false but R is true A..ertion (AI ; ·noc change in nvnil:rl;rility nf a •ystem is equ•l ro the ch:ange in !he Gibbs tlmction ｴｨｾ＠ system at constant temperature and ｰ ｲ･ｳｯ ｲ ｾＮ＠ RcallQn (R) . Tbc Gihhs 1\Jnotion i• •l•¢ful when cvaluntjng. Utu avuibbility of syes-lcul)j in wbich chemical reactions occur. 11. BoUr .\and Rare individt1.11ly truo 11nd R is the correct e:q>lonution of A. b. Both A and Rare individlllllly ln..: hut R is not the correct explnnation of A. c, A is lmd but R is false d. A l. fabe b ut R i• true As$cr1iOn (A) . All t:()nslanl ctllfll(l)' processes are adiabatic, but oil odiabutic processes are- not isentropic.

ｾＮ

.c

Rc:oson (RJ : As

om

om:,

xa

position or movement. n. Bolh A and Rare individ11.1lly true nnd R is tl1c correct ･ ＾Ｎ ｶｬｮｾｴｩｯ＠ of A.

64.

ce

61.

m

60.

8 o f ｉｾ＠ Reason (R) : 1\n ndial>atic process whi.>h resists the exchonge of energy to the surroundings Tnll)' hAVe irrevt:rsibillty dUe to friction ond ｢｣ｴｾ＠ c!Onduciion. lL Both A and R Jrc individunUy lmd and R ｩ ｾ＠ the C(11"l'l;;ol explanation of t\ . b. Bolh A und Ran; Iudividuall) ＡｉＧｬｾ＠ but R is not tho correct crplnnnlion of A. c. A i> true but R mGrise d. A is folst but R ;. true .-\sscnion (AI : At " CI) higJT densities,
ra

''· Both A and Rare individU4lly !nrc 1md R is theC()rrect ･Ｚｱ＾ｬｮｾｴｩｯ＠ of A. h. Both .\ ond Rare individually tme but R is not the correct explonalion of A. c A is true but R i< ｦ｡ｬｾ･＠ d . /\ is fR l§c but R is true Assertion (A) c Fire tubo ｨ ｵｩｬｯｾ＠ de.• 11111 opomre at high J)fC!iSUrel< whjle water inhc hoi\ers ''l,eratc: at high pressures, Rea.on !l'l.J Oue to high temperatuN of llu.e ga. Both , \ and R are lndividuallv true but R is not the ｾｯｲ･｣ｴ＠ ･Ｎｾｰｬ｡ｮｴｩ＠ of A. ｾ Ｎ＠ ,-\ is tme bul R ｾ ｾ＠ f•l'e tl A is fn loe hut R is true A..er1Jon (Al : 'r be internal en.,gy depends on U1e internal stare o.r a body. •s dt>temtined by its tempmwre. ｰｲ･ｳｵｾ＠ ｾ ｡ｮ､＠ compo.!t ilion. Re:oson (R) : lntduJal ｾｮ｣ｲｧ ｹ＠ of a suhstanc« docs not include nuy energy ｾｲ｡ ｴ＠ it may

61,

4. ｨ ｌｾ･＠ in cycle dlicocney. Which or tl1e ahove occur/occur.o due to rehcnting vf ｾ Ｑ ｃｯＱｭＧ ｬ＠ a. Only I b, I and 2 c. I. 3 und 4 d. 2 -uud 3 ｃｵ ｮ ｳｩ､ｾｲ＠ 0•• lollowing features fur· a g•rs ｬｷ ﾷ ｢ｩｮｾ＾＠ plnnl : 1. 1111-.'tCOO!i.ng 2. ｒ｣ＺｧｾＱ･ｲ｡ ｴ ｩｵｮ＠

Which of the abow fcJtutts in n ｾｩ ｭｰｬ ｣＠ go$ turbine cycle increase the work ratio'/

72.

e<mtrifugal compressor because I. the maltimum efticicncy i8 higher;

3. St.:l.g.nation prc..-s.surc 4. Static tempecalUI'C Select the Currc:ct ｡ｮｾｗ｣ｲ＠

4. the cost is lower. Which of the ｳ ｾｴ･ｭ correct. 7 a. I and 4

b. J\iacb number . 0.9

74.

ce of:

c. t..fach numher = 2 d. Msch numl>er changes suddenly ii·om

xa

\Vhotare l.be general e<,>mfort ｣ｮ､ｩ ｴ ｩｾｊ＠ ln a.u •ir-oonditioni.ng sys[1.1u ? u. 20"C DDT. 80'lo RH b. 24"C DBT. 60°o RH c.. 25°C DBT, 4()
ra

m

Wllt11 •ro s hock wovos formed iu air compn:ssol"'1 a. Moth nurubur < 0.9

a, Sensible heat only

b. Latent heat on ly

one ·va lue tu :mother

o. Both sco,.iblc o11d lntcut ｢｣ ｾ ｴ＠

Which nf the followinl! s tatemen ts are con-<:<:1 for mult.i.stagiug in a rc:ciproculing

.e

75.

d. Noue ofdte above \Vhnt is ohc ｳｴＺｾｓｩ｢ｬ｣＠ hear tltctor during the healing nnd lrurnidllication process e
Ill • liz H, - II,

b.

H 1 - R, !!, - H ,

c.

H, + H, H, - H,

w

J. lt decreases the volumetric:. c:flkicrtC")'. 2. The 1\urk done can be J't;
w

w

ot quircd. 4·. ·n,esize of flywheel is reduc. 2. ;\ ond .I c. 1, 3

above ore

d. 2, 3 and .j 73.

c. I. 2 ｡ｮ､ｾ＠ d. 2, 3 nn\1 ｾ＠

nir comprussol' ')

ｾｬｷｮ＠

c. L 2and 3

11.'>-ing thd ｣ｯ､･ｾ＠

givcu below : a.. Only I >nd :> b Unly 2 and 4

70.

ｮｴｳ＠

.c

b. Only 1 and 2

om

2. Uu: ｦｲｯｮ ｴｾ＠ I tareo .is luwc1. 3. the pressure nse per stage ;, more.

following parameters decre.'ISe across 3 no1mal shock wave'' I. Mach number 2. Stat ic tlfessl\fe

6'9.

Consider ll1c follow ing sblemenls ｾ＠

For ;a lArgo Il\li.Jtiou gll!l turbin"'r nn axial Oow eompressor is usu:J Uy preferred O\'lll'"

"· 1, 2 and 3 b. Only l •nd 2 c. Only 2 an
68,

., "' 14

d. Degree of re3etion

3. Roheot

｡ｮ､ｾ＠

d.

d. I ..Lind .I

Whal is the rntio or the iSL'f\lrOI)IC \I'OI'k to Euler's work lulown as ? ｯ ｾ＠ ｐｲ･ｳｵ ｯ ｾ＠ co.::ffid1011l b :;tip ractoo' c. \Vc>rk foetor

H, - H ,

fi , - H,

｜ｖｨ･ｲ｣ｾ＠ H_a Tob l beat o f atr ｣ｮ ｴ ｾｊｲｩｮｧ＠ the heating coil tbe healing H, Toul heat of nir ｬ･ｯＬｾｮｧ＠ ｣ｯｾ＠

HJ : Toltll hent of air nt the end of th e bumidificatlon

f!J ot'JI is Sol-air cemp(wJturc ?

2 Isobaric proc<:SS 3. lr..1.:horic process .j lsenthalpic process

a. It fs cqunl '" the stun
"

8L

M2.

d. land4 Mmch Lisl - I 'dth Tist • II and select the ｣ｯｲｾ Ｑ＠ answer using tJJc cOd'c give11 below lhe Lists List- I (Apparatus)

''" S
2

8

l

2

0

.e

w

w

w

19

p

(kPa)

b. 3 :md 4

c. I and 3

J 4 4

n

A

4

xa

m

7N.

c

4 3 2 3 l 4 d. 3 A lhemJoelcc&ric engfne "hich ｣ｯｮｳｩｬｾ＠ of t\\'0 dissimilar dcctrk conduch1rs connected at two junctions mointaincd nt difli:rcnl lcmperalurcs. convcrls a. Electric energy into heat energy b. H
b.

80.

0

.c

77

A I 2

a.

ra

lcmpernture, ond absorbed fotoJ radiation ､ｮｾ･＠ by outer surtucc convective hem transfer coefticient b Tt ｩｾ＠ equal tu the uilsorbcd total ra(limion •1ividcd ｢ ｾ＠ ｣ｾｭｶ･ｴｦ＠ ｨ ･ｾｵ＠ transfer coctlicicnl at outer surfucc c, It is equoJ to the total incident radiation divided by convective beat transfer ｣ｯｾｮｩ･ｲｵ＠ ut oUier surt:-.ce d It i;; equal 10 the sum of indoor atr tcmpemmre and nhsorbcd toW r!ldintion divided by conwctiw heat transl\:r coeflkienl at outer surface Which t)'pl! nf vul\'eS is generally used iu reoiprocruing t•cfngcrnnt cumprcs.•or• ·) a Mushroom valve b Puppcr valve c. Plull: valvc d. TitrOIIIe valve ｃｯ ｮｾｩ､･ｲ＠ the f\llhJwfng stntcmcnts pertaining to duct design I. AspectralJO of dueL' should be big.h. 2 lnlhe equul frictitllt mothtJd uf ､ｾＧｩｧｮ Ｌ＠ usc of damJlNS cannm be ｾｬｩ ｭ ｩｮｭ｣､＠ by any ｭｾ｡ｮ ｳ Ｎ＠ 3. The sta1ic r.:guin method is not suilablo for long ducts. .J The vclocit) ｲ･､ｵ｣ｬｾｴＧｮ＠ ｭｾｴｨｯ､＠ is employed only in simple systems. Which of lhe srntcmcnts given ah(li'C ｡ｲｾ＠ correct 7 a I and2

om

｜ｾｴｵ＠

ce

76,

2

I 4

6

c

I

8 10 VOlume (ml)

I 12

14

\Vhoch nne or the following is the correcl scqueoocc Ql' Ute th.rce ｰｭ｣ ｳ｣Ｎｾ＠ A. B omd C on the ｩｮ｣ｲｾ｡Ｎ＠ order of ｴ ｨｾ＠ amount of work doo"' by n gas following idoal-gas expansions by these processes o H. A· ll-C b 13-A-C c. ,\.C-B d C-A· Il A Cnmot ref'ri!temtot ha; o COl' ot 6. Wbnl is the ｲ｡ｴｩｾ＠ uf ｴｨｾ＠ lower 10 lhe ｨｩｾｬ＼Ａｲ＠ absolute lempcra!Ures 1

t/(, b. 7/8 c 617 D.

d. 1n 83.

A heat sour1.-e H1 cun SliPilly 6000 kJ/ mln at 3oo•c and ru1ollter heat source ll2 cun ｾ Ｑｰｬ ｹ＠ 60000 kJ/min at 1oo•c Which ｯｮｾ＠ or Ute liJIIowing ｳｴ｡･ｭｮｾ＠ IS correct iflhc me at 2 7°C ? surround ｩｮｾ＠

lJ of H I. ll 1s useful to eshmnte properties like cuthalpy from other measurable properties. 2 At a change of pllliSc. ll t!Ul be used to find the latent heat at a given press11te. 3. ll is dcnvcd fi·o"' the •fillatiotls hip

a, Bolh I he hea1 sources have We- s.nme

crrtcicnC) b TI.e fir.ll heat sou.w has lo11er rfficicnC) c. The second heal source has lower efficiency d TI1e first he,, l source prodtJoes hisJ.er

i'Jp) (8v

power

Wlucb of lhc statcu1euts given above arc coo:rect 'I

vnpour l'eSpeclivcl)')

c. Only I nnd '

(u, - 111 )l(v, - 1·1 ) b. (11,-111)t(v, - v1 ) c. (u. - 11 1 )t[T(v, - v1 ) ]

d

､ｾ＠

A 12 e m di.aoueter suaiglu pipe is laid no a umfonu downgrade 11lld Oow rote IS tnmntmncd snch ｬｨｾ＠ vclocllv head in the pipe is 11.5 m. lf the pressuro' ln the ptpe ts observed to be uuifonn along u.e l ength "hen the ､ｯＱ ｾｮ＠ slope of the p1pe is I in IU. wl.,t is lhe f riclionl;, ctor lor the pipe '1

d. 0.051)

89

rnlutonU rel="nofollow">ter registers a gnugo ctiffcrenuru of

manometer

air-oil

differential

as connecte.d to the snme.

l'cntun meter. NeglccL111g \ ariat10u of discharge coefficocnt for d10 venl.lllimeteo·. diffCICIIIIal for n " hal IS IlK' IIC\\

w

c. Enthalp)' of aor ｲ･ｮｾｩｳ＠ constanl d. Dl)' bulb lt!lupomou•e of ait ｾｭ｡ｩ ｮｳ＠ co11Siant Cons1der Uoc foUowing stalcrneuts ]JCrtaming to the Clapey ron equallon .

nn

unava,Jablc.

.!f:UJl"

flm, m te o((UI8 111 Is 'I a. 64 am b. 68cm

c

80cm

d. 85 Clll

nir remai ns conslnnt

1iu111idity of air "''""ius

A ve.uurimeter '" an oil (sp, gr. 11.8) pipe IS ｃｏ ｉｃ ｃｾ ､＠ lo 3 diffecc ntial lllaJIOII\eiCr ill which Ote gauge llquod is mercu1v (sp, gr. 13/il. Por ｾ＠ flow rate of 11.16 nt 1/s. the 20 em. TI1c oil -mcJ'CUIY manometer being

WbJcll one of the followmg ts com>cl lor the process 1-2 s howu nbove '' a. The partial pressure of wntcr vapour fn

001lSl3.Ul

ｾ＠

c. (),(142.

10

b. Specific

On]v 2 ｡ ｮ

b. ｃｕｬ

.e w

w

0

Ouly I and 2

• . 0.(1 12

xa

c. 17" = RT d. pv = nRT

m

(p- a!vl)(v +b) = RT

b

ce

(h, -tr1 )1[1'(v,-v.r }]

Wlud1 u11e of the foUowiug is tho chnrnclenstic cquatioll Qf n ocal gns'l a, (p- alv' ) (v- b) = RT b

1. 2and 3

ra

d.

$8.

a

om

According lo the Clapeyron CqMtion, which one of' the following gives the. slope of the saturated liquid pressure ｬ ･ｭｰ｣ｬ ｬ ｲｾ＠ CIIIVC dp/dT/ (suffix I' and g denote sawoalcd liquid and S>Jiuralcd a,

87.

flf •

.c

84.

1

Ｈ ｾＩ＠

;

\Ill.

:How nre the velOCity coefflcienl C.. the discharge coefficient C.s, nnd the contraction coefficient C, of au onfice ｲ･

a.

ｬ ｡ｴ･

､ ｾ Ｇ＠

c•. ;

C. C.t

u. c, = c.cd c. C., ;

cc.

92 .

9b.

97.

98.

a. I 8

d

93.

3 8

c.

Ｈｾ＠

Ｒｾ ﾷ＠

r

r

w

b. (

+

.e

ｲｾ ｲ＠

a

99.

xa

m

An open channel of symmctnc rig.hlnngled triangular cross- sectoon is ｣ｯｮｾ･ ｹｩ ｮｧ＠ n dischnrge Q. Taking ).!liS the acc.d eralion due to gruv1ly. ''jhnl is thtJ critical dopth ?

ra

b. I 7

c, 7 : 72

w

w

d(l;'r

'14-.

95.

In M-1. -T ｾｹｳｬ･

specific ｾｰ･

ｭ

､＠

a. L -ll• rJJl b. M 11: L' 11 r c. L1" ｲ ｾＧＺＡ＠

Ｌ＠

whnt ls 01e dimcn
for " mtodynamic pump 7

m

d. L'" ｲＧ ｾ＠ In !he boundary layer. the flmv is a. Viscous and rotationnl b luviscid tlnd lrmtationul

om

Whkh one of the fc•l lcl\1 ing ｓ ｴｦｬｾ ･ ｭ ｳ＠ i• corrccl • While u$ing boundary ｬ｡ｹｾｲ＠ equations. llcmoulli's equation a, can be used ｵｮ ｹｷ ｨ ･ｾ＠ b. can be used only outside 1hc boundary layer c, can be used only onside the boundary l•yer d cannul bc used either inside or ouiSJdc che ooWJdruy layer in lite boundary l'hc vdodt) ､ ｌｾ｣ｲｩ｢ｵｴｮ＠ ｬ ｾｹ｣ｲ＠ over a llat plate, ｾ･ ｬ＠ parulh:l h i the ｲ ｮｰｲ｣ ｾｩ｢ ｬ ･＠ ｦｲ ｣ｾ＠ srreaou di•·ection
ｉ ｾ＠ urt I c. lnv1scld aud rotational d Vbcous and irrutouionnl II is observed in a flow problem, !hal pressure. inertia and gravity forces are impootmot ｔ ｨ ･ ｾ＠ similarity ｲｾｱｵｩ ･ｳ＠ !hat a. Reynold• and ｗ｣｢ｾｲ＠ numbers ｢ｾ＠ cquol b. Mnch ond Froudt numbers be equrol c. Eiuler and Froude numbers be ec1ual d. Reynolds und Much numbers be ｾ ｱｵ｡ｬ＠ In a nor0111l shock in a gas a. Both the: downstream flow and ｴｨｾ＠ upslrcam llow arc supersonic b. Only lbc upstrcam now is supcrsllnic c. The ilownstream now b sonic d The upstream now is subSfmk Tbe pressuro tlrop fn a pipe now is directly prOfiQI1ionalto the mean ''el<>oot,y It c.un be deduced lhat ｾ｣＠ a. Plow is laminar b Flow is turhulent c. l'ipe is ｾ ＰＱ Ｑｨ＠ d. Pipe is rough

.c

•) I.

c.c,c, = 1

ce

d

I 00.

A circular jet of wnte.r impinges on n vertical Oat ｰｬｯｴｾ＠ nnd bifurcates into tW<> circular jets of half the dian•ctcr or lht vriginal. ,\ftcr hiuing the plate a. ｔｨｾ＠ jets move at ｾｱｵｬ＠ velocity which is twice ofthe original w locity b. The jets move nl equal velocity which is J tomes of tl1e original velocity c. Daia given is iosufficient 10 t:alculatc velocities of the two ｯｵ ｴ ｧｯｩｮｪｾｴｳ＠ d ｔｨｾ＠ ｪｾｌｓ＠ ｭｯｾ｣＠ 111 equal 'docity which is equal to chc origonal velocity h is recommended that the difl'user aogle shnuld he keplle$5 th:UI I 8° because a. f'rcssuo-.: decreases m now direction nnd tlo\\ separation may occur

13utl4

"' I

b.

ｅｑＱｾ

ｬｴ

ｵ＠

11>6.

given hcltJW

I

"" ,. 1 d. ｾ ＠ｉ

102

Which one of the f<•llt>wing is measured by n r<1l;:J1tieta·?

a ·velocity of ｄｵｩ､ｾ＠

107.

ra

ｾ ｲ｡ｬｵ｣＠ a. \\lct bulb ｬ＼Ｚｭｰ b. Relauvc humidily

c.

108.

xa

m

c. ViscoRity of fluids d. Rotntiunol s peell <1f ｾｯｬｩ､＠ • ha (h In o_jet punlp n. ｋｩｮ ｾ ｴ ｩ｣＠ unctgy of Ooid i! couv..,rh;d into potential energy b. Energy of ltig_h velocity •trc:un ,. converted inlo press ure energy

Energy of ltigh ｰｲ｣ｾｯｵ＠ Ouio is converted into energy of I 0\1 pressure fluid cl Potenti>l ene111y <>f ll11i' ovcJ .1 long range t)flhe p;o11lnncl 7 I. Fro.nci; tw·bine 2. !Coplon tllJ'bin" 3. Pelton lurbin" 4. ｐｲｾｰ･ｬ＠ turbine ｓｯ ｬ ･ｾｴ＠ the cvrrect ｾｮｷ･ｲ＠ u.slng the codes ｧｩｶｾｮ＠ bclo\1

.e

ｾ Ｎ＠

w

w

w

HH

105.

a. Only I b. Only I and 2 c. Only 2 •ncl3 d. 1, 2attd 3 Effectiv.: tempCI'atur.: depends on dJ) bu lb h!mpcraturtj. nod

b. Discharge of Ouids

103.

L2aud3 d. 2. 3 and 4 Whi"h of the following ｾ､ｶ｡ｮｴｧＢ＠ iFiar" tWssessed b)' a KAt)lan turbine: uvcr • lintHt:.IS Ｑｕｦ ｾＩｩｮ｣＠ 'l 1. Low frictiou;ol loss.,s. 2. Pru1. toad ･ｦｩＮＬｮｾｹ＠ ;, consideral>ly high. 3. More comp>cl ancJ small or in site. u•ing th" code. Select the correct ｡ｮｾｷ･ｲ＠ <.:..

.c

a

b. O nly 2 and 3

ce

10 I

a. 1 and 4

om

b. l'res$ure decreases in flow direc-tion and now mny become turbulent c. PreR§UI'\1 inc-rcnscs 10 flow direction and flow separation m3)' occur d_. ｐｲ･ｾｳｵ＠ increoses- in tlo.w direcrion and flow may become turbulent A converging diverging nozzle l. c.mnectcd 10 n gas pipeline. At the. Inlet of tbu nozzl<> (converging •oclion) the Mach number is 2. It is observed that lll<>ro is • shock in the dwergmg section. Wbat is thevahtt ｯｦｕｴｾ＠ M1ch numb.:r at lite throat ?

109.

ｓｰ･＼ｾｩｴｬ＠

only

humidity

d. Wet bulb temperature nod air motion A humruJ body fcols oomforublo wh.m tho heat produced by U>e metabolism of human body is equal to a. Heat dissipated to the >!UITOilndings b. Heat •ttm:d in the hurn!ln bndy c. Sum of lL ond b. d. Difference of o. and b. In 4 vapmn Cl)mprcssiun refri!fer:ttion plaJil, tloc cntllnlt>Y values nl tliifl:l'<1ll pointli are ; I. Enlhalpy nl exit of !be evoporator • 350 kJI\:g 2. Enthalpy ol oxil of the compressor 375 k.llka 3. ｬ ｾ ｮｕｷｬｰｹ＠ ｾ ｾ ･ｸｩ ｴ＠ of the condenser = 225 kJikg The refrigerating efficiency of the plant i• 0.8. What is the power Te<Jtrired pcr k\\1 of couling to be pruduccd'1

•· o.zs ｾｷ＠ b.

ｾ Ｎｏ

ｫ｜＠

12.5 k\V d. llk\V

c.

llntl4

I 16.

one of l)lc fC>IIowing ill correct? ｾ･ｲｯＮ＠ n, 1l1e effective ｴ･ｭｰｲｾｵ＠ b. The effoolivc tcmpcmtluro remain.; lllo

ｾ Ｎ＠

zer.,

s•tur•tion proc...-u

can wQrk M HumidiJier only

2. DohumidiJior only

Ｎ＠

Only I

.e

3. 'Filtc·•· only W11ich of Ute sl:il<>met•IS given Jll(lve islo.re eorrc.:t 1

a. A halide Lorch, which on do1llcting produces greenish !lame light b. Sulphur sucks, which on detoc!ing give the smoke

I 19.

c. ｬＱｾ ｩｮｧ＠ reagents d. Sensing reduction in pressures. Whul is tlw value of the shape foetor of two inJinne paro.llel s01foce •cparated by a

a. ()

c_ <)nly I anrl

b. ,,

ｾ＠

d. 1. 2nnd 3

c.

For small inslll llntion• of rcfrigcmtion systems (up to ;.; k\1 ), w hich type of condenser is used ?

d. ,,

n. Shell •nd lube type b. Shell ｮ､＠ｾ coil type c. Double tube ty pe

LJ5.

are detected by -

distanced 'I

w

w

I 14.

40.5 '\\' b. 405 c. .12. 5 \V d. 4'25 w The 1ew in o refrigerAtion system Fre<>n

b. Unlv 2 and 3

w

ｾ

po1• er

w

118.

m

Air ｷＱＮｾｨ･ｲ＠ I

minhnum

ll,

xa

d. Scnsiblo cooling process Consider the followmg stolemenls :

113.

the

ra

be brought lo 20"C ond 60'lu RH by. a. Cooling • nd dehnmidiiication rrocess h C<1ol ing and hnmidification ｰｲｯ｣ ･ ｾｳ＠ <:. ａ､ｩｯ｢ｾｴ｣＠

is

pump1

•lr ot 3 5"1• and 60% RH can ａＮｴｭｯｳｰｨ･ｾｩ｣＠

112.

\VhM

(npproximak) required tl.> tlrivc t.ltc he•(

ce

d.

A heaL pump is ｾ･､＠ co heat • house in the winter tmd then re\'er;;ed to cool the house in the summer. 'lltc ｩｮｾ､･＠ lcmporot11re uf the holL•c j.s lQ be m•intaincd 4L 20•c. 1l1c heat Iran• fer Utr
40'' u

om

117.

b. 60Uo 1:.

Domestic rcfiigcr•tor$

d. Gas liq11ernction

TI1o wet hulh ､｣ｰｲｳ ｾ ｩｵｮ＠ i• zct'O, "hen relxlive humidity ｩｾ＠ e<[U:tllo : IL Ill()"•

Ill.

cycle is

b. Commereial reliigcrall>l's c. ;\j)·...:onditionutg

N3111£f

c. ll1c effective tcmpcr.1turo incl'..:a:u"tt .. d. Tile cbangc in ｾｦ｣ｴｩｶ･＠ temper:•ture C'Jtutot be t>Stimoled wiU1 U1e giveu informntion

c. Absorber only d. Condcn•er and absorb« Wbdrc on nir Ｑ｜､Ｇｲｩｧｾ｡ｬｯｮ＠ generally employ•'
.c

Thy bulb lemperoture oml wet bulb temp<.'1'3tllfc is 25•C .:.ch. and velocity ol' Air possing ovor human body ｩＮｾ＠ 6 ｭ ｩ ｭｩｾＮ＠ II' velocity increase.\ to 20 mimin. tltcn wltich

L10.

d. Air cool.:d type In a vapour absorption ｲ･ｦｩｧＮｾｴｯ＠ rtjo.oted in : A. Condenser /lnly h. Gencmtor o nly

heal i;

120

It' the temlferature ot a ｾｯｩｬ

､＠ siate- ｣ｨ｡ｮ ｧ･Ｎｾ＠ from 17"C to 627"C. then emissive power ｣ ｨｾｮｧ｣ ｳＮ＠ which ｲ｡ｴｾｊ＠ a. G . I

b. 9 : I "- 17 ·I d. ｾｉ＠ : I