Q.P.Code:13208

1-1 i{riurs} Total Marks:80

. ()ltcrsiiott No I rr *-:olttllttlsr-ir\'

r \ttcrnpt illt\' ll)l!.:l rirlcsti(lll\ lrrirn tlic ictrraitring

. i\ssulttptiott ittailc sitoi.rlcl be ciearlv stared.

. Design l)ata lJoirk bv PSC. l\,lahatleviin and Kele & Khandare are pennitted to use.

' 0 I Answ'er rtnt lirttr ?(l

(a) "Modern l'loir.ting ancl Conveving ntac'lriner,v* is at the heart ol modern lnlinc

Productirln Svstenrs arrd "f ransf'er [.ine" elahorate r.r,ith exatnl:le.

(irl State the lilrrillriorrs of seoraetric progression. Wh1 (leonretric prtiuressiott r,alues atc

used in n-rai,hi;rc tool drive inspite of its limitation'l

(r.:1 \\ irr .ru i- rt'(',,r)lt ri rllr i.. ::41.., is selecied tor conrrecting roil o1'an IC enginc.

trl) \\Jirat rs tirc si::nilrcunct ol NPSI'l in Cientritugal pumpl)

(ci [)er.ir,c itn e \i]r'cssiln t'rll tlrc Lrrcal<ing strr:nglh ot'tire (r X ll t1,pe."i irc lo;'rc.

Q 2 (a) Illustrate the nrorpholog,v of \4echarrical Svsteni Design fbr Cerrtlilugal Purnp u'ith the 5

help of' tIor.i' chltrt.

tb) For the spectt'r,'rtiot't of itn FOT Crane . I 5

Application - Cllass II

Load to i:e i.ifi,.'ti - 1-50 KN

Hoisting spt:cci - l0nrinrin

Marirrrurr i.irt - 8rn

I Dr:sign {rr3r t,vpe o1'ropre irnclflnd its iilc.

ll I)c:;igir rr)pl rll Lun. cirttrl sltati and hearirtg

Iil \r,r" . ;r, 'r ,t.tirl. lr,,rrlitt" itt()li)l

Q.3 (a) Drau,neat sl<*icir oi'belt con\re\,or asse:mlritr and erplain the tirnctirin of Snub Pullci "i

and talce ufi arrrngerncnt.

(':DF5Cr145ll.s() I Fqqlls I 7EqCl2 tlFF {0(':

Turn Over

Q.l (a')

(hl

Q.:i la)

Qs (b)

Q.P.Code:13208

{b)'[hesPecrflcititott c () n \r € \'()l'

( apiicitr'

Materral to lrt ctltl','et'ctl

lnclinatitirr

l.tttrtp siz,.'

(-'t-:ntre tl ('ctrtrc distance

l l;rrt1 Il']oI()1" capacit\

Il Dcsigrl conveyor bclt

III Dcsign troughing idier. shaft and bearing for idier'

I\i. C'hcck the belt conveyor svsteln f'or arresting mechanisnl.

What i-r opilrlttlttl iiesign'l Write optirnttm dcsigtt proceclurc tirr norttlal spectficatron

Dr,"srgn lirii<,\'rng conlp(lllcnls of single c-v-lincler, fottr strolie ancl r't'ater cotllcrl I)tr:sel

Engrne r0 ilevr.loi'r 1(lK\\'at a speed of l000rpm bv rrraking surtahle assrtlnpttott and

rrent si<ctciti's.

I f',r liniier. [.iner. Cylincler [{ead and Strrcl'

Il l)iston rl'ith piston pin and piston rings'

Ill ('onneciing Rod w'ith small and big End'

Derii,c an expressiol for the Hydraglic tbrce develop on the gear shafi of Gear Purlp if

the pressrrrc increases from zero to P,nu* in ltto degree and remains constant on the

delivcrv sitlc at [',nn.,. Consider the external radiris of tlre gear as 'R' and \\riclth ot'the

ilear as'lt'

The specitiualions firr tlre Centrifugal Putup are'

t,iquicl Io bc handlc:cl : Water at rooll,| telnperatrtre.

'['rlt;-t] ttlitlr,rrnctric i leittl 2-lrn

svstcl'll arc-

l(x)"f PI I

Linte Ston.r

I 2 degrce

90mtr

I00tn

Disciratrsc : 900 l,itres per'lV{inr.rte

tlv nraki n g sLritiltrle tsstttlption,

I. Irind the sttction anci deliverv pipe diarrrerer

]

l.i

f-i

(' ? D f 5 ('44 5 B 5 0 I fj qq B 5 I ? H 9C'r 2 lJ ti. F'1 ( l(''l

Turn Over

1(

/

I1. Select standard Motor.

ru. Design Impeller (Basic Dimensions, Blades. Hub and shaft)

ry. Design Casing, ' .' . '

Specifrcation:

Minimum speed Nrmo= 4OrPm,

Draw struchrral

ry. Draw the gearing:diagPa4:

Show the

i'.":.1 i..3

,l"6

.,, ;,.4,_.

Q.6 (a)

(b)

I.

Itm,

V.

:, :,..

1' _\l

C2DF5C445B50 I E99B5 I 7E9C32BEEAOC2

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ii.; r;

lI 6 ( 9*tjil g,{,rD\m,\S

cbqsguJc: tEFl 46 Qt',

(Three Hourc)lnstructions:

. Q. , ls compulsary.

. Attempt dny THBEE questtons ftom the remaining questions

r Assume suitable dota wherever necessdry

. Flgures to'the right indlcate futt mdrks.

j.*s+ htr4 W Lorq,

ttfsfrt

Q.1

a.

b.

c.

d.

e.

Q.2 a.

b.

Q.3 a,

b.

Q.4 a.

b.

Q.5 a.

Answer in short. (Any Four).

What are the characteristics of a good wage systern?

What are the factors influencing plant layout?

z0

What are the different methods of depreciatl'ori?. , , ,.i .'

Whatarethedifferenttimestudyequippgns?:."..''+)'-i.i;-.-. -' .... i '.,1 i'-.'i:

How is a system approach usefulin,1,.L?j;: '

..' , , ,

t0

10

t0

10

10

What are the different methdsr.:" .''- '' :., .

What is anthropome@tllowiisla$rqh{@.oryetry data'use{,in design?r:''' ;:::

',;':

8 hours. The remaining time is meant for rest and persoual needs, etc.

i) Estimate the standard time per piece of a job whose notm*l time is 2 minutes.

ii) Find

iir) If

What are their advantages and 10

10

-!:\"'li/ t,

.,:H=:'Itf ff=;liiff pli':a=i;ii6."1;i.93;|j$ti.l,Piririrjif{itthe basic time value of money model with 10

10

_ a. Finansial Statements

b. Asses,rblylinebalanoing

: -' ;''r. ,' lt., B?jR. . . . ";-..-. .'r'..-.....

: -.t -i';"".4:. *Frtr[ffi'-..t ,:* ';.:i-,.:r,,.; -.,ll' '' l'- _" +- ''i"lti, r - . ' ....i' +''-e:' .li: :-..: .,:,. . .: ,-^ ;. ,,* I -' e) i*r'

,; jt. :''-s.1iii:..,'.;.{.,;,',if',:'si:-.-':t rf-.,,,:'"-*". > j; -;l .q::i J aJ,,t . ::3,,i,* a"; ^'*': :,., ,

',,.. .;" -:. '-., 't;i*-,."";:, .g:i-1." ".:+' *****rr******rr*.. :.r .

'. 1 .. . ."".-.:." ;l,,lf .^.:: :jl .i,;..{-,, .: ..r,.".--...- ,,;'.:lro;.".- .*.' -tt,J iil',,i1=,:r,,'n_1"ii,.

::,:::r;i-:{-,.:..,,.:..,. -

i..,,..,,":...a,, l ,,,: ..i.,1,:.;.: _i .

,'.,,: ...11.. ',..-]:.,-' l

' +.:.,:, :":..:, . -..1... .' ,l'i.*i: DF85B2CAF8DDC703193679392AE9964E

in a shift of

pieces in the shift, what is;I'r,r: ..5i,rt':.j::r -."\ \'l'"i,r'r ;,1 .l

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75328 iT1?42 REFRIGERATION & AIR CONDITIONING

Seu VWQ.P.

(Revised course)

[Time: Three Hours] IMarks:80i

Please check whether you have got the right question paper.

1. Question no. 1 is compulsory.2. ,qttempt any three questions out of the rematning five questions.

3" Clearly mention the assurnptions made if any.

4. Use of Refrigerant tables, Friction chafts, Psyehrometric chart, and Steam

table are permrtted.

L&ol"a Lor*"! RAL,AL tt4ed Nt7Code :L37.83

N.B:

Q.1 Answer rhe followrng questions

Explain difference between vapour compression,r'efriger:_ation.system and vapour absorption 04

refrigeration system.Explain the need of aircraft refrigeration. Draw reduced ambient air refrigeration cycle with 08

neat schematic and T-5 diagram.Define the term 'by pass factor' ursed for,heating and cooling coil. A4

What is the difference between heat purnp and refrigerator'. Derive the relationship for COP 04

between refrigerator and heat pump

Explain the working of simple vapour compression cycle with schernatic and P-h and T-s 08

diagrams.

a)

b)

c)

d)

Q.2 a)

b) 100 kW power rs used for refrigeration system working on

Requrred data are given belr:w:Anrbient air pressure = l- barAmbient air temperature = 288 K

Compressor deliver.y pressure = 3.5 bar:

bootstrap air refrigeration cycie. 72

Cabin pressure = l" bar

08a)

b)

Maximum pressure = 5.6 barHeat exchanger effectiveness for both heat exchanger = 0.85

Efficiency of main and auxiliary compressors is 0.83 and 0.75 resp.

Turbine e-ffiqiency = 0.77 ' :

Cabin is maintained at 28'C and 1 barDetermine

i. Refrigeration capacity in TR

ii. coPiii. Deterrnine the percentage of turbine power used by auxiliary compressor

Explairr the ozone depletion and globalwarming issues. Discuss desirable properties of good

i'efrigerant and designation of r"efrlgerant with example.

A food storage locker has a capacity of 12 TR and operates between the evaporationtem.perature of...8 eC and condensation temperature of 30 "C. The refrigerant R-12 is sub-

coolecl by 5'r5 before throttiing and the vapou!'is superheated by 2"C before leaving theevaporator, Assuming a twin cylinder single acting compressor running at 1000 RPM with L:D

332 I 6958208428 I 55E0538 I 1 858D90D9

{p.r.o}

t2

,1'-{]28 i Ti742 REFRIGE&{TION & AIR CONDITIONING

q.P. Code

Q.4 ai

b)

ratio of 1,.5.. Caicuiate:

i. COP of sYstem

ii. Specific Power required

iii, Diameteriv' Stroke of compressor having volumetric efficiency'.of.0:;9-4:. . ,. ..

Draw P-h and T-s diagram, . , .,.- :.;: .. . , -,.:' :

what are the types of expansion valves? Explain the wqiliiFs',"o.fJh;!fi-oita-tii expansipq.vdlve; '.'06

14

.: 1.

Outside 38"C DBT,28"CWBT ,'' ' ' - ..' .' ," .,'

lnfiltrated air = 1200 m3/h tl ' I :r: :'. ",,' , : ',:'1- --: '' ''Coil ADP = L0"C ] :' - :

6O% oftotal air is re-circulated 3,nd mixed with conditisned air after cooling coil' Find

08

06

06

2A

Q.s a)

b)

c)

i, Condition of air entering hall

ii, Refrlgeration load'

w hat is aspect ratio? Discuss the difter:ent"rnethod s, of",d uet'desi gn'

Explain t_i-Br Water vapour absorpiion;syste.rn with, neaf sfitch. ] ;

d) Dairy procesSrp{ant: ' l',. -' ., r'' .,',. ' ,

.,

e) 'Ty-pes of ,Psydhromqtr.li pro;ces!tr.l. ,'

f)' Steam jet refrigerati'dn"' ' :;

g) Controls.used'in Refriger:ation andrAir Conditioning

tl"6

**************

332i 6958208428 I 55E0538 1 i 858D90D9

i'

75328 /T1744 B.E.(MECHANICAL ENGGXSEM VIII) 2}RENEWABLE ENERGY

B E g€ M fTlT cbs drr R E"s

l4€u4 .

Ua3 zDtT

DF- 3olsll7,,',t'

(3 Hours)

N.B.: {1) Question No. I is compulsory.

(2) Answer any three {i.om the remaining five questions.

(3) Assume suitable data if required.

(4) Figures to the right indicate full marks.

2, a)

{?otal,Marks"S0]

[10]

[10]

j!.,..' ..': :.i

.-i:i '1

l. -.. tr-" '-i-

'I ,,', ': ,:i:. 1-.

A6E0A59D8F07 t B.CT s2F7D8786ED l 808,d

ITURN OVER

a) Fuel cells.

b) Classification of energyc) Life cycle cost.

d) Solar still.e) HAWT.

Location and latitUdE.r

Day and nme:r.'ivtb'iih',t..: ,. l

.::, ' .rir. ,\r,!

^': .+: ". -.:_ _a .'::r ' '

angle and collector efficiency.of KVIC design of a hiogas digester.

:": '. r..:'

totai.daily radiation on FPC facing south, at Delhi (28035'N,77012,E)

average sunshine hours per day is 9.5. Assume the values of

t10lbiogas digester suitable for output of four cows, and ii) the power

Retention time is 20 days and temperature 30 0C, Dry matter consurned0.24 m3 per kg. Burner efficiency is 60%o methane proportion is 0.8. Heat

may be assumed to be 28 MJim3. [10]

Annual

T5328 t Tr744

4.

.ii l:: '!. :-. .^: '.. 'l-' 1:- :: .:: r- ,,1,: "*].t-' _: ;'i::'$ r !l 'n?

'.:. .

-' .-":t ,:,:i:"'."r"'':;:

"-

. 'r.i ; :.:-tt I _-.' - ,

A6E0A59D8FA7 LBCT 52F7D8786ED I 808A

5.

6. Answer any four.a) What is Wave energy?

b) \that are advantage$ and

c) What is Open cycle OTEC Plant?di What is Produccr gas'/

e) Define i) solar constant, ii)

j::

Ts328 trl?48 B.E.(MECITAMCAL ENGGXSEM YIID (CBSGS) 6)AUTOMOBILE

With the help of neat skctch explain in brief;a) Drum Brakes

b) Tandem master cylinderc) Differentiald) Hydraulic torque converter

:::,' .:.,;llt ,.

be

1.

2. Write a short note on

a) ABSb) ZEBRAc) Aerodynamicsd) Overdrive

r,'.\1 jl.r a: tt.

:' '...'

.- l;t 5j 14.--,- .'..

\i !t!'}.a

1At+

6

10

l0

l4

6

14

6 A) Disctus; Opcn, Semi lntegral,and Integral structures

B) What is BattBry,ratings? :

l.:-' -ta"l , : -.,' -:-r .-.:\.'- ,.':." i- .'.. '.' ,;'1' ,-:

".t;,'..]li:j.:,,,;, ,,1'',.1 r..- -:.,r-;i ' i,...:,

A6E0A59D8F07 LBCT 52F7 D8786IlD 1 3 669

Dl- - 3Pi;f$

' .'.1'--, -.

of uQats-ket-sh

cussray;5r)l-sarr:9illrtsly.r1l*",.:- - ;..1 l

:.;..,,1,.1..,,,i ;,'.:,'..,., .,, t_, 1_- ,-

+.,-, .'..'',1;...:,,1t,.;t'

,rsi,i ,:1:,,, r;,.,-";.i;,j;q:i;;..r{1}}i ii'

,il i,r,{ .,*t,tr:i":-::,'-,iJ1l:iilil",::i---i: .:.:: ..','. :- ..

a q,t s l.t?,, ,,. ..t r - ,

., . .. ,:... ..1- i. .": ..., .. '

with its advantages