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Paper-1 Set B Key

Regn No: ____ _____________

Name: ___________________

(To be written by the candidates)

8 th NATIONAL CERTIFICATION EXAMINATION – May, 200FOR

ENER!" MANA!ERS # ENER!" A$%ITORS

PAPER – 1& !e'era( A)pe*t) + E'er y Ma'a e.e't # E'er y A/ t

Date: 23.05.2009 Timings: 0930 !230 "R# D$ration: 3 "R# %a&. %ar's: !50

General instructions:

o Please check that this question paper contains 7 printed pageso Please check that this question paper contains 64 questionso The question paper is divided into three sectionso All questions in all three sections are compulsory o All parts of a question should be answered at one place

Se*t +' – I& OB ECTI3E T"PE Mar4)& 50 6 1 7 50

(i) nswer a 50 *$estions(ii) +ach *$estion carries +'e mar'(iii) , ease hatch the a--ro-riate o a in the /%R answer sheet with ac' ,en or

" -enci 1 as -er instr$ctions

!. ndia s -ro en oi reser es is abo$t __4 o tota wor d reser es

a) 0.! b) 2 c) 0.6 d) 6

2. The a erage o-erating #tation "eat Rate (#"R) o a Therma ,ower , ants is 3000'7a 8' h corres-onding to this the station therma e iciency in -ercentage is

a 289:; b) 33.34 c) 60.!4 d) !5.54

3. hich o the o owing may not be a s$itab e energy sec$rity o-tion or ndia ; a) im-ro ing +nergy + iciency b) increasing <atro-ha 7$ ti ationc) increasing Renewab e +nergy $se d) increasing oi ired therma -ower stations

6. The #ector which is not a Designated cons$mer as -er the atest =a>ette is

a) Rai ways b) ron ? #tee c) Therma ,ower - ants d) 7ommercia $i dings

5. s -er +nergy 7onser ation ct1 200! a--ointment o ++ 7erti ied +nergy %anger ismandatory or

a) %e) 'ate C+')/.er) b) @rban Aoca odiesc) 7a-ti e ,ower , ants d) + ectrica Distrib$tion Aicensees

! _____________________

$rea$ o +nergy + iciency



Paper-1 Set B Key

B. hich o the o owing co$ d be a better inde& o $i ding +nergy ,er ormance;

a) so ar "eat =ain actor by wa and roo b) ratio o air conditioned to tota car-et areac) 4<h per /' t area + the =/ ( ' per year>4<h ?S@9 .eter?yeard) r atio o 7a-ti e generation to grid -ower cons$med

C. 7a c$ ate the amo$nt o e ectricity re*$ired to heat ! b$c'et (20 it) o hot water rom 3050 07

a) 6B5 ' h b) ! ' h c) 0.6B5 ' h d) 2 ' h

. hich o the o owing energy storage methods has the highest energy densities (' h -er 'g);

a hy r+ e' b) * om-ressed air c) gaso ine d) ead acid battery

9. The rate o energy trans er is meas$red in a) atts b) '7a 8hr c) T@8hr d) a(( + the a=+ e

!0. three -hase ind$ction motor is drawing !5 m-ere at 660 Eo ts. the o-erating -ower actor o the motor is 0. 0 and the motor e iciency is 9041 then the -ower drawn by themotor is

a) 9.!6 ' b) .2 ' c) !0.!B ' d) 5. B '

!!. Name- ate ' or ", rating o a motor indicates

a) in-$t ' to the motor b) o$t-$t ' o the motor c) minim$m in-$t ' to the motor d) ma&im$m in-$t ' to the motor

!2. ater ow in -i-es is meas$red by

a) -ress$re ga$ge b) in rared imaging c) $ trasonic meters d) anemometer

!3. The genera y acce-ted energy -er ormance -arameter or therma -ower - ants wo$ d be

a) heat rate ('7a 8' h) b) 4 a$&. -ower cons$m-tionc) s-eci ic coa cons$m-tion d) a the abo e

!6. The ty-e o energy -ossessed by the charged ca-acitor is

a) 'inetic energy b) e ectrostatic c) -otentia d) magnetic

!5. %atching energy $sage to re*$irement means -ro iding

a) F$st theoretica energy needed b) F$st the design needsc) energy with minim$m osses d) ess than what is needed

!B. n genera #-eci ic +nergy 7ons$m-tion o a -rocess - ant or a gi en -rod$ct mi& andraw materia mi&

a) increases with increasing ca-acity $ti i>ation= e*rea)e) th '*rea) ' *apa* ty /t ( at +'c) remain a most constant irres-ecti e o ca-acity $ti i>ationd) has no re ation with ca-acity $ti i>ation

!C. hich o the o owing wi not moti ate em- oyees to conser e energy;

2 _____________________




Paper-1 Set B Key

a) training b) awareness c) en orcing targets d) incenti es

! . hich o the o owing best de ines the ro e o an energy manager ;

a) energy a$ditor and in charge o the inance de-artment o the - ant

b) intermediate - ayer between to- management1 energy and cost centers o the - antc) in charge o the ca-ti e -ower - ant and mediator between - ant and + ectricity boardsd) mediator between -rod$ction manager and -roFect manager

!9. Ten barre s o cr$de oi is e*$i a ent to

a) !B00 iters b) 2050 itres c) 2000 itres d) !0 iters

20. eed o !00 tonnes with 604 moist$re1 is dried to 204 moist$re1 the amo$nt o water a-o$r e a-orated wo$ d be

a) 20 b) 2 c) 30 d) 60

2!. The orce ie d ana ysis in energy action - anning considers

a) -ositi e orces on y b) negati e orces on y* =+th 'e at e a' p+) t e +r*e) d) no orces

22. n oi ired boi er o-erates at an e&cess air o 204. the stoichiometric air to $e ratio is!6 and oi cons$m-tion is 200 'g -er ho$r then the mass o $e gas ea ing the boi er chimney in 'g8 ho$r wo$ d be

a) 35B0 b) 33B0 c) 36B0 d) 3BB0

23. hich o the o owing is a se;

a) ! ca orie G 6.! C '< b) ! ca orie G 6.! C<c) !000 ' h G ! % h d) B0 '7a G ! ' h

26. The contract in which the +#7/ -ro ides inancing and is -aid an agreed raction o act$asa ings as they are achie ed is ca ed

a) traditiona contract b) e&tended inancing termsc) shared sa ings -er ormance contract d) energy ser ice contract

25. hich o the o owing e*$ation is $sed to ca c$ ate the $t$re a $e o the cash ow;

a) N,E (! H i) n b) N,E I (! H i) n * NP3 >1 D ' d) N,E8 (! I i) n

2B. The cost o insta ation o a ariab e s-eed dri e in a - ant is Rs 2 a'h. The ann$asa ings are Rs 0.5 a'h. The maintenance cost is Rs. 510008year. The ret$rn onin estment is

a) 254 = 2295; c) 264 d) 2C.54

2C. sensiti ity ana ysis is an assessment o

a) cash ows = r )4) /e t+ a))/.pt +') c) ca-ita in estment d) best inancing so$rce

2 . Jor an in estment which has a $ct$ating sa ings o er its -roFect i e which o theseana ysis wo$ d be the best o-tion

a) ,aybac' = NP3 c) R/ d) RR

3 _____________________




Paper-1 Set B Key

29. R/ m$st a ways be ___ than interest rate

a) ower = h her c) e*$a d) no re ation

30. s$m o Rs !01000 is de-osited in a ban' at the beginning o a year. The ban' -ays !04interest ann$a y. "ow m$ch money is in the ban' acco$nt at the end o the i th year1 i nomoney is withdrawn;

a 1 105 b) !5000 c) !5500 d) !B000

3!. contract in which the costs are -aid rom a or -art o the energy cost sa ings is ca ed

a) -er ormance contractb) traditiona contractc) e&tended technica g$arantee contract

/ara'tee )a ' ) per +r.a'*e contract

32. The ann$a e ectricity bi or a - ant is Rs !0 a'hs and acco$nts or 3 4 o the totaenergy bi . J$rthermore the tota energy bi increases by 54 each year. "ow high is the- ant s ann$a energy bi at the end o the third year;

a R) 09G (a4h) b) Rs 2B.32 a'hs c) Rs 3 .62 a'hs d) none o the abo e33. n ,roFect %anagement the critica -ath in the networ' is

a) the *$ic'est -ath b) the shortest -athc) the -ath rom start to inish the path here '+ a*t t e) ha e )(a*4

36. The techni*$e $sed or sched$ ing the tas's and trac'ing o the -rogress o energymanagement -roFects is ca ed

a) 7,% = !a'tt *hart c) 7@#@% d) ,+RT

35. air consists o CC4 by weight o nitrogen and 234 by weight o o&ygen1 the meanmo ec$ ar weight o air is1

a) !!.9 b) 289 2 c) !C.C d) none o the abo e3B. The ca ori ic a $e o oi is !0000 '7a 8 'g. Jind o$t the coa e*$i a ent to re- ace ! 'g o

oi (7oa =7E G !B000 K<8'g) ass$ming same e iciency

a) 0.B25 'g b) 2.B 'g c) 2 'g d) none o the abo e

3C. n a heat e&changer1 in et and o$t et tem-erat$res o coo ing water are 2 / 7 ? 33 / 7. Thecoo ing water circ$ ation is 200 itres 8hr. The -rocess $id enters the heat e&changers atB0 / 7 and ea es at 65 / 7. Jind o$t the ow rate o the -rocess $id;(7- o -rocess $id G0.95)

a) C0 b) B3! c) B3 d) 5C0

3 . hich o these is not a d$ty o an energy manager

a) Re-ort to ++b) ,ro ide s$--ort to accredited energy a$diting irmc) ,re-are a scheme or e icient $se o energyd) #ign an energy -o icy

39. Aarge scattering on -rod$ction ers$s energy cons$m-tion trend ine indicates

a p++r pr+*e)) *+'tr+( b) many orced o$tagesc) -oor -rocess monitoring d) none o the abo e

6 _____________________




Paper-1 Set B Key

60. n a c$m$ ati e s$m chart1 i the gra-h is hori>onta 1 then

a) nothing can be saidb) energy cons$m-tion is red$cedc) s-eci ic energy cons$m-tion is increasing

a*t/a( a' *a(*/(ate e'er y *+')/.pt +' are the )a.e

6!. D$e to high oi -rices1 a irm goes or s$bstit$tion o oi and with biomass in a boi er. Theo owing scenario is most i'e y

a) higher $e cost b) better boi er e iciency* h her e'er y *+')/.pt +' d) ess smo'e in the stac'

62. hich o the o owing Jinancia na ysis Techni*$es ai s to consider the time a $e o money

a S .p(e Pay=a*4 Per + >SPB ) b) nterna Rate o Ret$rn ( RR)c) Net ,resent Ea $e (N,E) d) none o the abo e

63. ss$me -roFect has an RR o 54 and N,E o Rs !51000 and -roFect has an RR o 254 and N,E o 2001000. hich -roFect wo$ d yo$ im- ement irst i inancing is a ai ab eand -roFect technica i e is the same;

a B b) c) cannot be decided d) *$estion does not ma'e sense

66. The i&ed energy cons$m-tion or the com-any is !000 ' h. The s o-e in the energy H-rod$ction chart is o$nd to be 0.3. Jind o$t the act$a energy cons$m-tion i thecom-any is to -rod$ced 01000 Tons o -rod$ct

a) 251000 b) 261000 c) 2B1000 d) 3 1000

65. hich o the o owing is not an en ironmenta iss$e o g oba signi icance

a) />one ayer de- etion b) = oba arningc) Aoss o iodi ersity d) S/)pe' e part */(ate Matter

6B. The commitment -eriod or emission red$ctions o anne& co$ntries as -er Kyoto -rotocois

a) since 200! b) 200 H 20!2 c) there is none d) 20!2 2022

6C. The = oba arming ,otentia (= ,) o Nitro$s /&ide gas is

a) ! b) 2! * 2:0 d) !00

6 . The nationa in entory o greenho$se gases in ndia indicates that abo$t __ 4 o the tota7/ 2 emissions come rom energy sector

a 55; b) !54 c) 04 d) Neg igib e

69. />one ayer is o$nd in the stratos-here between

a) 5 to !0 'm abo e the gro$nd b) 10 t+ 50 4. a=+ e the r+/' c) 50 to !00 'm abo e the gro$nd d) !00 to 200 'm abo e the gro$nd

50. n 7D% termino ogy 7+R means

a) 7arbon +mission Red$ction b) 7 ean +n ironment Ratingc) 7erti ied +mission Red$ction d) 7arbon +mission Rating

…….……. End of Section – I ………..….

5 _____________________




Paper-1 Set B Key

Se*t +' - II& SHORT %ESCRIPTI3E $ESTIONS Mar4)& 8 6 5 7 G0

(i) nswer a E ht *$estions(ii) +ach *$estion carries F e mar's

# ! Reno ation and %oderni>ation (R?%) o a 2!0 % coa ired therma -ower - ant

was carried o$t to enhance the o-erating e iciency rom 2C4 to 3!4. The s-eci iccoa cons$m-tion was 0.C 'g8' h be ore R?%. Jor 000 ho$rs o o-eration -er year1 and ass$ming the coa *$a ity remains the same1 ca c$ ate

a) the coa sa ings -er year and

b) the e&-ected a oidance o 7/ 2 into the atmos-here in Tons8year i theemission actor is !.53 'g 7/ 28'g coa

N# Spe* * *+a( *+')/.pt +' + *+' e't +'a( p+ er p(a't 7 09: 4 ?4<hSpe* * *+a( *+')/.pt +' + p+ er p(a't a ter R#M7 09: 6 >092:?09 1 7 09 0 : 4 ?4<hC+a( )a ' ) per a''/. 7 >09:-09 0 : 6 210 6 1000 6 8000

7 1,51,:0G T+''e) per a''/.CO2 a + a'*e 7 1,51,:0G 6 195

7 2 210: t+''e) per a''/.

# 2 An energy meter connected to a 3 phase, 18.75 kWh pump shows 108 unitsconsumption for si hours of operation. !he "oad on the motor was steady. !heconsumer dou#ted the energy meter reading and e"ectrica" parameter such ascurrent, $o"tage and power factor were measured. !he measured $a"ues were%30 & "ine $o"ts, 30.' amps "ine current and 0.80 (ower )actor. )ind out if theenergy meter reading is correct.

N# *nergy consumption + 3 0.%30 -k& 30.'-A 0.80-() /-hours+ 108 kWh!he consumption shown #y energy meter is correct

# 3 hat is meant by the o owing terms ;

a) Norma ising o data

b) enchmar'ing

N# a N+r.a( ) ' + ata

The energy $se o aci ities aries great y1 -art y d$e to actors beyond the energye iciency o the e*$i-ment and o-erations. These actors may inc $de weather or certaino-erating characteristics. Norma i>ing is the -rocess o remo ing the im-act o ario$s

actors on energy $se so that energy -er ormance o aci ities and o-erations can becom-ared.

B _____________________




Paper-1 Set B Key

a Be'*h.ar4 '7om-arison o energy -er ormance to -eers and com-etitors to estab ish a re ati e$nderstanding o where o$r -er ormance ran's.

# 6 hat are the three e&ib e mechanisms a ai ab e $nder Kyoto -rotoco orachie ing ="= red$ction targets. +&- ain brie y the mechanism a-- icab e to

ndia.

N# !. <oint im- ementation2. +missions trading3. 7 ean De e o-ment %echanism (7D%)

7D% is a-- icab e to ndia. t is a mechanism by which the de e o-ed co$ntriesinance8 $nd -roFects intended to red$ce ="= emissions in ret$rn or emission red$ction

credits. This wi he - them to achie e the emission red$ction targets. ternati e y theemission red$ctions achie ed by de e o-ing co$ntries can a so be -$rchased1

# 5 hat is a #an'ey diagram and what are its $ses ; +&- ain with an e&am- e.

N# The #an'ey diagram is a ery $se $ too to -ro-ortiona y re-resent an entire in-$tand o$t-$t energy ow in any energy e*$i-ment or system s$ch as boi ers1 ired heaters1

$rnaces etc. a ter carrying o$t an energy ba ance ca c$ ation1 This diagram re-resentsis$a y ario$s o$t-$ts and osses so that energy managers can oc$s on inding

im-ro ements in -rioriti>ed manner.

E6a.p(e&

C _____________________




Paper-1 Set B Key

# B I' a *+.pre))e a r %ryer, e(e*tr *a( heater ) /)e +r re e'erat +' + ) ( *a e(9The pre)e't E(e*tr *a( e'er y *+')/.pt +' ) 100 4<h? ay9 The.a'a e.e't 'te' ) t+ rep(a*e the e(e*tr *a( heater =y )tea. *+ (9 aH+ ./*h )tea. ) 'ee per ayJ = Ca(*/(ate *+)t )a ' )?year9 C+)t+ p+ er ) R)9G?4 h a' *+)t + )tea. ) R)9 00?t+' >A))/. ' +'(y

(ate't heat + )tea. /)e 9 Late't heat + )tea. ) 5G0 4*a(? 4 9E * e'*y + )tea. heat ' ) :0;, +perat ' ay) 7 00

N# Aatent heat o steam G 560 'ca 8'ga) mo$nt o steam re*$ired G !00 L B08(560L0.C)

G 22C.5 'g8day

b) 7ost o -ower G !00 L 6 G Rs.6008day7ost o steam G 0.22C5 L B00

G Rs. !3B.58day nn$a cost sa ings G (600 H !3B.5) L 300 G Rs. C90508

# C +&- ain Time o Day (T/D) Tari and how it is bene icia or the -ower systemand cons$mers;

N# . I' T .e + the %ay Tar >TO% )tr/*t/re '*e't e) +r p+ er ra (/r ' + -pea4 h+/r) a' ) '*e't e) +r p+ er ra ( /r ' pea4

h+/r) are =/ (t '99 Ma'y e(e*tr *a( /t ( t e) ( 4e t+ ha e (at e.a' */r e t+ a*h e e h h

p(a't e * e'*y99 T+% tar e'*+/ra e /)er t+ ra .+re p+ er /r ' + -pea4 h+/r)

>)ay /r ' 11p. t+ 5 a., ' ht t .e a' (e)) p+ er /r ' pea4h+/r)9 E'er y .eter (( re*+r pea4 a' + -pea4 *+')/.pt +' a''+r.a( per + )eparate(y9

9 TO% tar e) +pp+rt/' ty +r the /)er t+ re /*e the r = (( ' , a) +pea4 h+/r tar ) @/ te (+ ' *+.par )+' t+ pea4 h+/r tar 9

9 Th ) a()+ he(p) the p+ er )y)te. t+ . ' . e ' ( 'e *+' e)t +', 't/r' h her ( 'e (+))e) a' pea4 (+a '* e't a' /t ( t e) p+ erpr+*/re.e't *har e) =y re /*e e.a'

# 7a c$ ate the net -resent a $e o er a -eriod o 3 years or a -roFect with the o owingdata. The disco$nt rate is !54.

Mear n estment (Rs) #a ings (Rs)0 !1201000! 501000 C510002 C510003 C51000

N# N,E G !201000 I(C5000 50000)8(!I0.!5) I C50008(!I0.!5) 2 I C50008(!I0.!5) 3

G !201000 I 2!1C39 I 5B1C!0 I 691 3!3 G Rs. CCB2

.……. End of Section – II ………..….

_____________________ $rea$ o +nergy + iciency



Paper-1 Set B Key

Se*t +' – III& LON! %ESCRIPTI3E $ESTIONS Mar4)& 6 10 7 0

(i) nswer a F e *$estions(ii) +ach *$estion carries Te' mar's

A ! a) Draw ,+RT 7hart or the o owing or the tas'1 d$ration and de-endency gi enbe ow.

b) Jind o$t:i. 7ritica ,athii. e&-ected -roFect d$ration

Ta)4 Pre e*e))+r) Ta)4)

(De-endencies) T .e ><ee4)

A -

B - 5

C - :

% A 8

E B 5

F C 5

! E G

H F 5

I %

! - H G

N#

• The *r t *a( path ) thr+/ h a*t t e) C, F, H,

• The e6pe*te pr+ e*t /rat +' ) 21 ee4) >:D5D5DG

9 _____________________




Paper-1 Set B Key

A 2 a) +&- ain the $nctioning o an +#7/ in -er ormance contracting.

b) Name two macro and micro actors considered in the sensiti ity ana ysis omaFor energy sa ing -roFects.

ns a)

+#7/s are $s$a y com-anies that -ro ide a com- ete energy -roFect ser ice1 romassessment to design to constr$ction or insta ation1 a ong with engineering and-roFect management ser ices1 and inancing.

n -er ormance contracting1 an end $ser (s$ch as an ind$stry1 instit$tion1 or $ti ity)1see'ing to im-ro e its energy e iciency1 contracts with +#7/ or energy e iciencyser ices and inancing. n agreed -ortion o the sa ings is shared with the +#7/.The +#7/ gets bac' the in ested money - $s -ro it o er a -eriod o time

b)

M *r+ a*t+r)

! /-erating e&-enses ( ario$s e&-enses items)

2 7a-ita str$ct$re

3 7osts o debt1 e*$ity

6 7hanging o the orms o inance e.g. easing

7hanging the -roFect d$ration

Ma*r+ a*t+r) %acro economic ariab es are the ariab e that a ects the o-erationo the ind$stry o which the irm o-erates. They cannot be changed by the irm smanagement. %acro economic ariab es1 which a ect -roFects1 inc $de amongothers:

7hanges in interest rates 7hanges in the ta& rates

!0 _____________________




Paper-1 Set B Key

7hanges in the acco$nting standards e.g. methods o ca c$ ating de-reciation 7hanges in de-reciation rates

+&tension o ario$s go ernment s$bsidi>ed -roFects e.g. r$ra e ectri ication =enera em- oyment trends e.g. i the go ernment changes the sa ary sca es m-osition o reg$ ations on en ironmenta and sa ety iss$es in the ind$stry

+nergy ,rice change Techno ogy changes

A 3 +nergy sa ing meas$res was im- emented in a -rocess - ant -rior to <an 200 .@se 7@#@% techni*$e and ca c$ ate energy sa ings or B months -eriod o 200 .

The com-any -rod$ced consistent y 2000 T8month in each o the si& months.

Re er the gra-h gi en in tab e be ow.

The -redicted #-eci ic energy cons$m-tion or 2000 %T -rod$ction is 2B0 ' h8%T.t may be noted that retro its were not $nctioning d$ring %arch ? %ay 200 .

A*t/a( Spe*1,1* E'er-y C+')/.pt1+' Pr+,1(e

236

280

235

290

239240

200210220230240250260270280290300

Jan Feb Mar Apr May Jun

Month

S p e * 1

1 * E ' e r - y

C + ' ) / . p

t 1 + ' , 4 <

h ? M T

N#

200%onth

ct$a#+71

' h8%T

,redicted#+7

' h8%T

Di erenceG ct$a

,redicted 7@#@%

<an 260 2B0 20 20

Jeb 23B 2B0 26 66

%ar 2 0 2B0 I 20 26

!! _____________________




Paper-1 Set B Key

-r 235 2B0 25 69

%ay 290 2B0 I 30 !9

<$n 239 2B0 2! 60

G 60 ' h8%T & 2000 %T+nergy #a ings or si& months G 0000 ' h

A 6 a) Draw an energy ba ance or the D= set with o owing data.

Diese =enerator tria gi es #et 3.2 ' h -er Aiter o diese . The coo ing water oss and e&ha$st $e gas oss as -ercentage o $e in-$t are 3!4 and 354

res-ecti e y. ss$me ca ori ic a $e o diese as !0200 '7a 8'g. The #-eci icgra ity o Diese is 0. 5. 7a c$ ate $nacco$nted oss as -ercentage o in-$tenergy.

b) +&- ain the o owing terms in heat trans er with e&am- es.

i) 7ond$ction ii) 7on ection

N# a P+ er O/tp/t 7 92 4<h 6 8 0 4Ca(?4<h 7 2:52 4Ca( P+ er O/tp/t a) ; + /e( 'p/t 7 >2:52?>0985610200 6100 19:G; L+))e) a) ; + /e( 'p/t&

C++( ' <ater L+)) 7 1;E6ha/)t F(/e !a) L+)) 7 5;There +re, /'a**+/'te L+)) 7 100-> 19:GD 1D 5 7 292 ;

b)i) C+' /*t +'

The cond$ction o heat ta'es - ace1 when two bodies are in contact with oneanother. one body is at a higher tem-erat$re than the other1 the motion o themo ec$ es in the hotter body wi ibrate the mo ec$ es at the -oint o contact in thecoo er body and conse*$ent y res$ t in increase in tem-erat$re.

ii) C+' e*t +' The trans er o heat by con ection in o es the mo ement o a $ids$ch as a gas or i*$id rom the hot to the co d -ortion. There are two ty-es o con ection: nat$ra and orced. n case o nat$ra con ection1 the $id in contactwith or adFacent to a high tem-erat$re body is heated by cond$ction. s it is heated1it e&-ands1 becomes ess dense and conse*$ent y rises. This begins a $id motion-rocess in which a circ$ ating c$rrent o $id mo es -ast the heated body1contin$o$s y trans erring heat away rom it. n the case o orced con ection1 the

mo ement o the $id is orced by a an1 -$m- or other e&terna means. centra i>ed hot air heating system is a good e&am- e o orced con ection .

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Paper-1 Set B Key

A 5 ,rod$ction rate rom a -a-er machine is 360 tonnes -er day (T,D). n et and o$t etdryness to -a-er machine is 604 and 954 res-ecti e y. + a-orated moist$retem-erat$re is 0 O7. To e a-orate moist$re1 the steam is s$-- ied at 3 'g 8cm 2.Aatent heat o steam at 3 'g 8cm 2 is 5!C '7a 8'g. ss$me 26 ho$rs8day o-eration.

i) +stimate the *$antity o moist$re to be e a-oratedii) n-$t steam *$antity re*$ired or e a-oration (-er ho$r)

Note: 7onsider entha -y o e a-orated moist$re as B32 'ca 8'g N# ,rod$ction rate rom a -a-er machine G 360 T,D

G !6.!B T," (tonnes -er ho$r)

n et dryness to -a-er machine G 604/$t et dryness rom -a-er machine G 954

i) +stimation o moist$re to be e a-orated:,a-er weight in ina -rod$ct G !6.!B & 0.95

G !3.65 T,"

eight o moist$re a ter dryer G 0.C0 T,"

,a-er weight be ore dryer on dry basis G !3.65 T,"

eight o moist$re be ore dryer G ((!3.65 & !00)860) H !3.65 G 20.!C5 T,"

+ a-orated moist$re *$antity : 20.!C5 0.C0 G !9.6BC T,"

ii) n-$t steam *$antity re*$ired or e a-oration+ a-orated moist$re tem-erat$re G 0 O7

+ntha -y o e a-orated moist$re G B32 '7a 8'g"eat a ai ab e in moist$re (sensib e ? atent) G B32 & !96BC

G !2303!66 '7a 8h

Jor e a-oration minim$m e*$i a ent heat a ai ab e sho$ d be s$-- ied romsteam

Aatent "eat a ai ab e in s$-- y steam (at 3 'g8cm 2) G 5!C '7a 8'g

P$antity o steam re*$ired G !2303!668 5!C G 23C9C 'g

G 23. %T8ho$r

!3 _____________________




Paper-1 Set B Key

A B n agency is im- ementing +nergy e iciency meas$res in m$nici-a water -$m-ing $nder +#7/ ro$te. The in estment is Rs. B crores. ,resent ann$a bi is Rs. 6 7rores. Thee&-ected sa ings are 204. ( 7ost o -ower G Rs.68'wh1 nn$a maintenance cost !04 o in estment) The e&-ected 7D% re en$es wo$ d be Rs. 50 Aa'hs8year. 7a c$ ate RR or

this -roFect a ter inc $ding the 7D% bene it N#

yearoutfo

w infowNetfow

Rs.Lakhs Savings CDM

0 -600 0 -6001 -60 80 50 702 -60 80 50 703 -60 80 50 704 -60 80 50 70

5 -60 80 5070

6 -60 80 50 707 -60 80 50 708 -60 80 50 709 -60 80 50 70

10 -60 80 50 70 IRR 3%

…….……. End of Section – III ………..….

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paper-1 set-b_key

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