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Paper 1 Set A Answer Key

Regn No: _________________

Name: ___________________

(To be written by the candidates)

5thNATIONAL CERTIFICATION EXAMINATIONFOR

ENERGY MANAGERS ENERGY A!"ITORS# N$%e&'er( )**+

PAPER 1, Genera- Aspe.ts $/ Ener0y Mana0e&ent Ener0y A23t

Date: 17.11.2007 Timings: 090!120 "R# D$ration: "R# %a&. %ar's: 10

General instructions:

o Please check that this question paper contains 7printed pages

o Please check that this question paper contains 64questions

o The question paper is divided into three sections

o All questions in all three sections are compulsory

o All parts of a question should be answered at one place

Se.t3$n I, O4ECTI6E TYPE Mar7s, 5* 8 1 9 5*(i) nswer a** 5*+$estions(ii) ,ach +$estion carries $nemar'(iii) P-ease 2ar7en the appr$pr3ate $%a- 3n the OMR answer sheet w3th :4 Pen.3- $r

4-a.7 C$-$r 4a-- Pen ( as per 3nstr.t3$ns

1. The -irst maor commercia* energy cons$ming sector in the co$ntry is

a; 3n2stry b) agric$*t$re c) residentia* d) trans/ort

2. #e*ect the so$rce o- stored mechanica* energy

a) water '; .$&presse2 a3r c) coa* d) e*ectricity

. #e*ect the incorrect statement with res/ect to arbon %ono&ide ()

a) it is emitted into the atmos/here as a res$*t o- comb$stion /rocesses and -romo&idation o- hydrocarbons and other organic com/o$nds.

b) in $rban areas is /rod$ced a*most entire*y (903) -rom road tra--ic emissions

c) at *e4e*s -o$nd in ambient air may red$ce the o&ygen!carrying ca/acity o- theb*ood.

2; 3t sr%3%es 3n the at&$sphere /$r a per3$2 $/ appr$83&ate-y 1 year an2 /3na--y0ets $8323

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6. hoose the incorrect statement with res/ect to Designated ons$mers as co4ered $nderthe ,nergy onser4ation ct2001

a; the 2es30nate2 .$ns&er has t$ 0et ener0y a23t .$n2.te2 'y a .ert3/3e2ener0y a23t$r?

b) certi-ied energy managers are re+$ired to be a//ointed or designated by thedesignated cons$mers

c) designated cons$mers wo$*d com/*y with norms and standards o- energycons$m/tion as /rescribed by the centra* go4ernment.

d) designated cons$mers to s$bmit a re/ort in the -orm and manner as may be/rescribed on the stat$s o- energy cons$m/tion at the end o- the e4ery -inancia* yearto designated agency.

. The co$ntry which has the *argest share o- /ro4en oi* reser4e in the wor*d is

a) 8# b) hina .; Sa23 Ara'3a d) ran

. The +$antity o- heat re+$ired to raise the tem/erat$re o- 1 'g o- a s$bstance by 1o

is'nown as

a; spe.3/3. heat b) sensib*e heat c) *atent heat d) ca*ori-ic 4a*$e

7. The +$antity o- heat re+$ired to con4ert one 'g o- a so*id into a *i+$id witho$t change o-tem/erat$re is ca**ed

a; -atent heat $/ /s3$n b) s/eci-ic heat c) sensib*e heat d) heat ca/acity

;. 'g o- water /er 'g o- dry air ('g cosB '; @ 6 I c) C > cosB d) >

12. - the density o- a *i+$id -$e* is ;0 'gB5 b) ;0 c) 1.17 d) none o- the abo4e

1. hich o- the -o**owing is not tr$e -or a /re*iminary energy a$dit

a) estimate the sco/e -or sa4ings b) identi-y *ow cost

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1. ,nergy management in4o*4esE

a; .$&'3nat3$n $/ te.hn3.a- an2 &ana0er3a- s73--s b) on*y manageria* s'i**sc) on*y technica* s'i**s d) on*y energy a$dit s'i**s

1. #an'ey diagram is a $se-$* too* to re/resent

a) -inancia* strength o- the com/any to consider energy conser4ation /roectsb) management /hi*oso/hy to red$ce waste.; 3npt an2 $tpt ener0y /-$wd) h$man reso$rce strength o- the com/any to ha4e good ho$se 'ee/ing

17. ater -*ow in /i/es is meas$red by

a; p3t$t t'e b) &!rays .; 2$pp-er e//e.t d) e*ectric -ie*ds

1;. ,nergy management does not inc*$de

a) energy conser4ation b) satis-ying reg$*ations.; 2e.reas3n0 na%$32a'-e -$sses d) -$e* s$bstit$tion

19. n a coa* -ired boi*er ho$r*y cons$m/tion o- coa* is 1000 'g. The ash content in the coa* is03. - the boi*er o/erates 26 ho$rs

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27. n a -orce -ie*d ana*ysis one o- the indicators be*ow is not considered a negati4e -orce

a) *ow /rice o- energy '; ener0y e//3.3ent te.hn$-$0y a%a3-a'-ec) *ow sa*ary o- sta-- d) ins$--icient -inancia* reso$rces

2;. hich o- the -o**owing is not a re+$irement -or energy a$dit /*anning

a) -eedbac' '; p'-3.3ty c) metering d) b$dgeting

29. n in4estment o- Rs 260000 has a sim/*e /aybac' /eriod o- two years. The month*ysa4ings m$st be

a) Rs ;000 '; Rs 1*(*** c) Rs 900 d) Rs 12000

0. hich o- the -o**owing is not a /roect /*anning techni+$e@

a) F% b) F,RT c) ?antt hart 2; C!S!M

1. #ensiti4ity ana*ysis is an assessment o-

a) cash -*ows '; r3s7s 2e t$ ass&pt3$nsc) ca/ita* in4estment d) -inance so$rcing

2. =or an in4estment which has -*$ct$ating ann$a* sa4ings o4er its /roect *i-e which o- the-o**owing -inancia* ana*ysis techni+$es is the best@

a; NP6 b) R c) #im/*e /aybac' /eriod d) RR

. s$m o- Rs 0000 is de/osited in a ban' at the beginning o- a year. The ban' /ays 93interest ann$a**y. "ow m$ch money in Rs. is in the ban' acco$nt at the end o- the -i-thyear i- no money is withdrawn@

a) 600 b) 7200 .; +(1 d) none o- the abo4e6. hat is the R -rom a /roect which re+$ires a ca/ita* cost o- Rs.200 *a'hs and ha4ing a

ann$a* net cash -*ow o- Rs.60 *a'hs

a; )* b) 603 c) 203 d) 123

. The -$t$re 4a*$e o- a cash -*ow in Rs. at the end o- the thyear i- the Fresent >a*$e isRs 2.0 Ga'hs and the interest rate is 93.

a; (5(D)* b) 0;000 c) 26000 d) none o- the abo4e

. The -irst ste/ in a /roect de4e*o/ment cyc*e is

a) start training '; 32ent3/y pr$e.t .$&p$nentsc) arrange -inance d) im/*ement the /roect

7. hich one o- the -o**owing not the d$ty o- an energy manager

a) /re/are a scheme -or e--icient $se o- energyb) /re/are an ann$a* acti4ity /*anc) re/ort to 5,, and state *e4e* designated agency once a year2; .$n2.t ener0y a23t

;. n any /roect the critica* /ath in the networ' is

a; the -$n0est path b) the /ath in which the acti4ity with highest d$ration -a**s

c) the /ath witho$t any d$mmy acti4ity d) the shortest /ath

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5$rea$ o- ,nergy ,--iciency6

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9. n the -irst two months the c$m$*ati4e s$m is ; and ; res/ecti4e*y. n the ne&t two months,ca*c$*atedis more than ,act$a*by ;. The energy sa4ings at end o- the -o$rth month wo$*d be

a; # B b) 26 c) 2 d) none o- the abo4e

60. The -i&ed energy cons$m/tion -or the com/any is 2000 'ha*$e o- coa* is 6200 'a*< 'g. =ind o$t the oi* e+$i4a*ent o- 00 'g o- coa* i-the a*ori-ic >a*$e o- oi* is 10000 'a*< 'g

a) 620 'g b) 00 'g .; )1* 70 d) 200 'g

6. hich o- the -o**owing gas damages the oAone *ayer

a; CFCHs b) 2 c) Nitrogen d) rgon

67. hich is a greenho$se gas

a; N3tr$s O832e b) Nitrogen c) #$*-$r Dio&ide d) none o- the abo4e

6;. The Frototy/e arbon =$nd has been estab*ished by

a) 8nited Nations b) 8nited #tates .; $r-2 4an7 d) Ia/an

69. The ?*oba* arming Fotentia* (?F) o- carbon dio&ide is considered as

a; 1 b) 1;.7 c) 21 d) 270

0. ne o- the -*e&ib*e instr$ment as stated in the Jyoto Frotoco* is

a) 2 ada/tation '; C-ean "e%e-$p&ent Me.han3s& =C"M;c) 2 se+$estration mechanism d) none o- the abo4e

-------- End of Section - I ---------

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5$rea$ o- ,nergy ,--iciency

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Se.t3$n # II, S:ORT "ESCRIPTI6E J!ESTIONS Mar7s, B 8 5 9 D*

(i) nswer a** E30ht+$estions

(ii) ,ach +$estion carries F3%emar's

#!1 Name any -i4e greenho$se gases res/onsib*e -or g*oba* warming.

Answer,

=3; CO) =Car'$n "3$832e;( =33; C:D =Methane;( =333; NO8=N3tr$s O832es;(=3%; :) O=0; =ater 3n %ap$r /$r&;( =%; :FCs =:y2r$ F-$r$ Car'$ns;(=%33; SF =S-/r :e8a/-$r32e;( =%333; PFCs =Per$ F-$r$ Car'$ns;

#!2 n e*ectric heater o- 20 > ' rating is $sed -or hot water generation in anind$stry. =ind e*ectricity cons$m/tion /er day (a) at the rated 4o*tage (b) at 190 >.

Answer,(a) E-e.tr3.3ty .$ns&pt3$n =7h; at rate2 %$-ta0e 9 7 8 )D h$r 9

+) 7h2ay>(b) E-e.tr3.3ty .$ns&pt3$n at 1* 6 =7h; 9 =1* )*;) 8 7 8 )D

h$r 9 D 7h2ay>

#! hich set o- standard e+$i/ment does the energy a$ditor need to estab*ish theo/erationa* e--iciency o- an nd$ced dra-t -an@ ss$me that the o/erationa* e--iciencyo- the motor can be 'nown -rom the /er-ormance chart o- the motor.

Answer,

a 7 &eter/$r &easr3n0 3npt p$wer t$ the &$t$rpressre &an$&eters trans2.ers t$ &easre s.t3$n an2 23s.har0epressrea p3t$t t'e arran0e&ent t$ &easre /-$w 3n $r2er t$ assess the /an

e//3.3en.y>

#!6 "ow m$ch steam is re+$ired in a heat e&changer to heat 0 'g< ho$r o- a /rocess-*$id -rom 60 to 100 . The s/eci-ic heat o- /rocess -*$id is 0.26 'a*

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:eat re3re2 per h$r( & .p t 5* 8 *>)D 8 =1**#D*; 9 +)* 7Ca- h$r

Stea& re3re2 +)*5D*

1> 70 stea&hr

#! therma* /ower /*ant $ses 0. 'g o- coa* to generate one 'h o- e*ectricity. - thecoa* contains 63 carbon by weight ca*c$*ate the amo$nt o- 2emissions< 'hgenerated $nder com/*ete comb$stion conditions.

Answer:

C + O2 ------------------- CO2 1) ) !!!!!!!!!!!!!!!!!!! DD

1 70 $/ .ar'$n 03%es DD1) 70 $/ .ar'$n 23$832e

CO2 emissions/kWh = 0.65 x 0.54 x 44/12

9 1>)B+ 70 $/ CO)7h

#! a*c$*ate the Net Fresent >a*$e o- a /roect at a disco$nt rate o- 13 with anin4estment o- Rs 0000 at the beginning o- the -irst year and sa4ings o- Rs 1000

Rs. 1;000 and Rs. 20000 res/ecti4e*y at the end o- the -irst second and thirdyear.

NP6 9 #5*(***=15***1>1;1B***=1>181>1;=)****=1>181>181>1;;

9 #5*(*** 1)1 1++ 1)B1 K (# 1*B+;

#!7 ,&/*ain brie-*y F,RT.

The Pr$0ra&&e E%a-at3$n an2 Re%3ew Te.hn3e =PERT; 3s a netw$r7 &$2e- thata--$ws /$r ran2$&ness 3n a.t3%3ty .$&p-et3$n t3&es>

PERT ses three t3&e est3&ates( $pt3&3st3.( &$st -37e-y an2 pess3&3st3.> Th3s he-ps 3nesta'-3sh3n0 the pr$'a'3-3ty $/ .$&p-et3n0 a pr$e.t w3th3n a spe.3/3e2 t3&e an2 ta7e.a-.-ate2 r3s7s 'e/$re .$&&en.3n0 a pr$e.t>

PERT has the p$tent3a- t$ re2.e '$th the t3&e an2 .$st re3re2 t$ .$&p-ete apr$e.t>

Note:Some candidates might have represented in the form of a diagram. Due considerationmay be given for the diagram.

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#!; /*ant cons$mes 00 tons o- -$rnace oi* /er year (?> K10200 'a*1 8 1*1* 7Ca- D(*** Mh 9 D(***(*** 7h

9 D(***(*** 8 B* 7Ca- 9 )>)D 8 1*1* 7Ca-

T$ta- .$ns&pt3$n 5>1 )>)D 9 B>5D 8 1*1* $/ wh3.h ) =5>+; 3s $3-an2 1 =D>; 3s e-e.tr3.3ty>

-------- End of Section - II ---------

Se.t3$n # III, LONG "ESCRIPTI6E J!ESTIONS Mar7s, 8 1* 9 *

(i) nswer a** S38+$estions(ii) ,ach +$estion carries Tenmar's

G!1 a) n energy a$ditor is trying to estab*ish the o/erating /ower -actor o- a 1 "F

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PF 9 55>B51 9 *>)B

Th3s .a-.-at3$n a0rees w3th the 23sp-ay $/ *>)B>>

:$we%er 3t 3s n-37e-y that a 15 :P11>) 7 &$t$r $perat3n0 at D* -$a2 w3--e%er a.h3e%e a PF $/ *>)B> C$nseent-y s$&eth3n0 3s ssp3.3$s w3th the3nstr&ent>

There/$re the answer 3s NO>

b)

Frimary energy so$rces are those that are either -o$nd or stored in nat$re.

ommon /rimary energy so$rces are coa* oi* nat$ra* gas and biomass.

ther /rimary energy so$rces -o$nd on earth inc*$de n$c*ear energy -romradioacti4e s$bstances therma* energy stored in earthLs interior and /otentia*energy d$e to earthLs gra4ity.

G!2 a) De-ine M*atent heat o- -$sionL and M*atent heat o- 4a/oriAationL@

b) 5rie-*y de-ine acti4e a//arent and reacti4e /ower

Answer

a)

Latent heat $/ /s3$n =L; $/ a s'stan.e 3s the ant3ty $/ heat re3re2 t$.$n%ert 1 70 $/ s$-32 t$ -332 state w3th$t .han0e $/ te&peratre>

Latent heat $/ %ap$r3

b)

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A.t3%e p$wer,

7 3s the a.t3%e p$wer $r the w$r7#pr$2.3n0 part $/ apparent p$wer

Apparent p$wer =K3-$%$-t A&pere =76A;;

It 3s the pr$2.t $/ 73-$%$-ts an2 a&peresTh3s &easres the e-e.tr3.a- -$a2 $n a .3r.3t $r syste&>

.Rea.t3%e p$wer

Reacti4e /ower (76Ar; is the /ortion o- a//arent /ower that does no wor'.This ty/e o- /ower m$st be s$//*ied to a** ty/es o- magnetic e+$i/ment s$ch asmotors trans-ormers etc.

.

G! 5rie-*y e&/*ain the -o**owing terms:

a) ,nergy %anagementb) ,nergy a$dit (as de-ined in , ct 2001)c) Frod$ction -actord) Re-erence year ,+$i4a*ent ,nergy 8see) F*ant energy /er-ormance

a; Ener0y Mana0e&ent

The judicious and effective use of energy to a!ii"e #rofits $inii"ecosts% and enhance co#etitive #ositions&

=OR;

The strate0y $/ a2st3n0 an2 $pt3&3

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.; Pr$2.t3$n /a.t$r

Pr$2.t3$n /a.t$r 3s se2 t$ 2eter&3ne the ener0y that w$-2 ha%e 'een re3re2t$ pr$2.e th3s yearHs pr$2.t3$n $tpt 3/ the p-ant ha2 $perate2 3n the sa&eway as 3t 232 3n the re/eren.e year>

It 3s the rat3$ $/ pr$2.t3$n 3n the .rrent year t$ that 3n the re/eren.e year>

productionsyearference

productionsyearCurrentfactoroduction

'Re

'Pr =

2; Re/eren.e year E3%a-ent Ener0y !se

The re/eren.e yearHs ener0y se that w$-2 ha%e 'een se2 t$ pr$2.e the.rrent yearHs pr$2.t3$n $tpt &ay 'e .a--e2 the re/eren.e year ener0y see3%a-ent $r re/eren.e year e3%a-ent /$r sh$rt>

The re/eren.e year e3%a-ent 3s $'ta3ne2 'y &-t3p-y3n0 the re/eren.e yearener0y se 'y the pr$2.t3$n /a.t$r =$'ta3ne2 a'$%e;

Re/eren.e year e3%a-ent 9 Re/eren.e year ener0y se 8 Pr$2.t3$n /a.t$r

e;P-ant ener0y per/$r&an.e

The 3&pr$%e&ent $r 2eter3$rat3$n /r$& the re/eren.e year 3s .a--e2 ener0yper/$r&an.e an2 3s a &easre $/ the p-antHs ener0y &ana0e&ent pr$0ress> It 3sthe re2.t3$n $r 3n.rease 3n the .rrent yearHs ener0y se $%er the re/eren.e( an2

3s .a-.-ate2 'y s'tra.t3n0 the .rrent yearHs ener0y se /r$& the re/eren.eyears e3%a-ent> The res-t 3s 23%32e2 'y the re/eren.e year e3%a-ent an2&-t3p-3e2 'y 1** t$ $'ta3n a per.enta0e>

100xequivalentyearReference

energysyear'Current-equivalentyearReferenceeperformancenergyPlant =

The ener0y per/$r&an.e 3s the per.enta0e $/ ener0y sa%e2 at the .rrent rate $/se .$&pare2 t$ the re/eren.e year rate $/ se> The 0reater the 3&pr$%e&ent( theh30her the n&'er w3-- 'e>

G!6 The detai*s o- acti4ities -or im/*ementation o- an energy e--icient /roect is gi4enbe*ow:

A.t3%3ty Pre.e23n0 a.t3%3ty "rat3$n =2ays; ! 105 9 6D 7, 2= , ? 5 D ;" D 6

=?" 1

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a) draw a F,RT chartb) -ind o$t the d$ration o- the /roectc) identi-y the critica* /ath.

a)

'; "rat3$n 9 * 2ays

.; Cr3t3.a- Path, A#C#"#G#I

G! n in4estment o- Rs. 1.10 Ga'h is made -or a 4ariab*e s/eed dri4e at the beginning o-the year which is a*so the date o- -irst o/eration. #a4ings e&/ected o4er 6 years areRs. 2;000 Rs. 000 Rs. 60000 and Rs. 60000 res/ecti4e*y. =ind o$t the RR o-the /roect.

1(1*(*** 9 )B(***=1r1**; 5(***=1r1**;) D*(***=1r1**;D*(***=1r1**;D

IRR 9 11 =app;

G! a) Determine the amo$nt o- moist$re on a wet and dry basis -or a waste s*$dge that has0 'g o- water and 20 'g o- so*ids.

b) %i*' is e4a/orated in a steam ac'eted 'ett*e at atmos/heric /ress$re. 1000 'g mi*' ischarged /er batch in the 'ett*e. %i*' is heated -rom 0 to 100 and boi*ed

contin$o$s*y ti** 23 o- the mass is e4a/orated. Determine the amo$nt o- drysat$rated steam at 1 'g

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b)#,N#5G, ",T R,8R,D K 1000 S 0.9 S (100 H 0)

K *** 7Ca-

water e4a/orated K 1000 & 0.2 K 20 'g*atent heat -or e4a/orating 20 o- 'g o- water K 20 & 60 K 15*** 7Ca-

Tota* heat re+$ired K 1000 P 000 K 1B*** 7Ca-

#team re+$ired at 1 'g

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