Energy Manager Certification Exam

Paper 1 –Set A Solutions
Regn No: ____ _____________
Name: ___________________
(To be written by the candidates)
6
th
NATIONAL CERTIFICATION EXAMINATION – May !""#
FOR
ENER$% MANA$ERS & ENER$% A'(ITORS
PAPER – 1) $ENERAL ASPECTS OF ENER$% MANA$EMENT & ENER$%
A'(IT
Date: 10.05.2008 Timings: 0!0"12!0 #R$ D%ration: ! #R$ &a'. &ar(s: 150
General instructions:
o Please check that this question paper contains 11 printed pages
o Please check that this question paper contains 64 questions
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*tion – I) O+,ECTI-E T%PE Mar.s) /" 0 1 1 /"
(i) )nswer a** /" +%estions
(ii) ,ach +%estion carries one mar(
(iii) -*ease hatch the a..ro.riate o/a* in the 0&R answer sheet with 1*ac( -en2 as .er
instr%ctions
1 The +%antity o3 heat re+%ired to raise the tem.erat%re o3 1 (g o3 a s%bstance by 1
o
4 is
(nown as
a) 4a*ori3ic 5a*%e b) 6atent #eat c) $ensib*e #eat d) Spe*i2i* 3eat
! ) three .hase ind%ction motor is drawing 12 am.eres at 770 /o*ts. 83 the o.erating .ower
3actor is 0.802 then the .ower drawn by the motor is
a) 456 .7 b) 7.227 (9 c) :.1 (9 d) .5 (9
6 )ir /e*ocity in d%cts can be meas%red by %sing ___ and manometer
a) 0ri3ice meter b) 1orden ga%ge *8 Pitot tu9e d) )nemometer
: The energy manager has to .er3orm the 3%nction o3 ____.
1) 0rgani;er 2) -*anner !) 4o"ordinator 7) Team *eader
a) 122 < ! b) 1 < 2 on*y c) 122 < 7 ;8 All the 2our a9o<e
/ )mong which o3 the 3o**owing 3%e* is the di33erence between the =45 and N45 ma'im%m>

a) 4oa* b) ?%rnace 0i* *8 Natural $as d) Rice #%s(
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1%rea% o3 ,nergy ,33iciency
1
Paper 1 –Set A Solutions
6 83 3eed o3 500 tonnes .er ho%r at 5@ concentration is 3ed to a crysta**i;er2 the .rod%ct
obtained at 25@ concentration is e+%a* to ____ tonnes .er ho%r.
a) A5 98 1"" c) 1A5 d) 200
4 The benchmar(ing energy .er3ormance .arameter 3or a cement .*ant is
a) (ca*B(g c*in(er b) (9hB ton o3 cement
c) (9hBton

o3 c*in(er ;8 All o2 the a9o<e
# 8n 3orce 3ie*d ana*ysis which one o3 the actions gi/en be*ow do not 3a** %nder .ositi/e
3orce>
a) high .rice o3 energy b) energy e33icient techno*ogy a/ai*ab*e
c) to. management commitment ;8 la*. o2 a=areness
> The interna* rate o3 ret%rn cannot disting%ish between ____________
a) 6ending b) 1orrowing *8 +oth a & 9 d) None o3 the abo/e
1" The year in which 8ndia rati3ied the Cyoto .rotoco* >
a) 1A b) 2000 *8 !""! d) 200!
11 The .resent /a*%e o3 e+%i.ment is Rs. 102000 and interest on disco%nt rate is 10@. The
3%t%re /a*%e o3 the cash 3*ow at the end o3 2 years is:
a) Rs. 10000 98 Rs5 1!1"" c) Rs. 8100 d) Rs. 82:7
1! The ret%rn on in/estment (R08)2 is e'.ressed as
a) ann%a* cost B ca.ita* cost b) (3irst cost B 3irst year bene3its) ' 100
c) N-5 B 8RR ;8 ?annual net *ash 2lo= @ *apital *ost8 0 1""
16 ,nergy and .rod%ction data is %se3%* to ca*c%*ateDD
a8 Spe*i2i* EnerAy ConsuBption b) $.eci3ic .rod%ction ratio
c) ,nergy 8ntensity d) None o3 the abo/e
1: The .resent /a*%e o3 Rs. 1000 in 10 years time at an interest rate o3 10@ is:
a) Rs. 257 98 Rs5 6#6 c) Rs. !7 d) Rs. 10000
1/ ?or a .roEect to be /iab*e R08 m%st a*ways be
a) *ower than interest rate 98 hiAher than interest rate
c) ,+%a* to interest rate d) has no re*ation to interest rate
16 The time between its ear*iest and *atest start time2 or between its ear*iest and *atest 3inish
time o3 an acti/ity is
a) de*ay time 98 sla*. tiBe c) .roEect time d) start time
14 The techni+%e which %ses three time estimates 3or .roEect monitoring is
a8 PERT b) 4F$F& c) 4-& d) none o3 the abo/e
1# The critica* -ath in 4-& %sed in .roEect .*anning techni+%es indicates _____.
a8 tiBe reCuire; 2or the *oBpletion o2 the proDe*t b) de*ays in the .roEect
c) ear*y start and *ate com.*etion o3 the .roEect d) none o3 the abo/e
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1%rea% o3 ,nergy ,33iciency
2
Paper 1 –Set A Solutions
1> ) sensiti/ity ana*ysis is an assessment o3
a) cash 3*ows 98 ris.s ;ue to assuBptions
c) ca.ita* in/estment d) best 3inancing so%rce
!" The main constit%ents o3 =reenho%se gases (=#=) are
a8 CO! & C3: b) $0' c) N0' d) water /a.or
!1 )n oi*"3ired boi*er o.erates at an e'cess air o3 20@. 83 the stochiometic air to 3%e* ratio is 17
(g o3 air .er (g o3 oi* and oi* cons%m.tion is 150 (g .er ho%r2 then the mass o3 3*%e gas
*iberated in (gB ho%r wo%*d be
a) 2100 b) !000 c) 2520 ;8 !64"
!! ?or a** the e'.endit%res in the .*ant2 the /a*%e o3 cash 3*ow at the end o3 the year wi** be
a) -ositi/e 98 NeAati<e c) Ni* d) None o3 the abo/e
!6 The sim.*est techni+%e 3or sched%*ing o3 tas(s and trac(ing .rogress is
a) 4-& 98 $antt *hart c) -,RT d) 4%s%m
!: The month*y e*ectricity bi** 3or a .*ant is Rs 100 *a(hs which acco%nts 3or 75@ o3 the tota*
month*y energy bi**. #ow m%ch is the .*antGs month*y energy bi**
a8 Rs !!!5!! la.hs b) Rs 75 *a(hs c) Rs 1!8 *a(hs d) None o3 abo/e
!/ =reenho%se gases a..ro'imate*y ma(e %. abo%t ____________ .ercent o3 the
atmos.here
a) 2 b) ! *8 1 d) !.5
!6 The cost o3 a heat e'changer is Rs. 1.0 *a(h. The sim.*e .aybac( .eriod ($--) in years
considering ann%a* sa/ings o3 Rs :02000 and ann%a* o.erating cost o3 Rs 102000 is
a) 0.50 b) 1.:: *8 !5"" d) :.00
!4 9hich o3 the 3o**owing gas damages the o;one *ayer>
a) )rgon b)CFCEs c) 402 d) Nitrogen
!# 8n a c%m%*ati/e s%m chart2 i3 the gra.h is hori;onta*2 then
a) nothing can be said
98 a*tual an; *al*ulate; enerAy *onsuBption are the saBe
c) energy cons%m.tion is red%ced
d) s.eci3ic energy cons%m.tion is going %.
!> 8n the 3irst two months the c%m%*ati/e s%m is 12 and 27 res.ecti/e*y. 8n the ne't two
months ca*c%*ated energy cons%m.tion is more than act%a* energy cons%m.tion by 12 3or
each month. This means the energy sa/ings at the end o3 the 3o%rth month wo%*d be
a8 " b) 12 c) "12 d) 27
6" The 3i'ed energy cons%m.tion o3 a com.any is 1000 (9h .er month. The *ine s*o.e o3 the
energy (y) /ers%s .rod%ction (') chart is 0.2. The energy cons%med in (9h .er month 3or
a .rod%ction *e/e* o3 802000 tonsBmonth is
a) 1:2000 b8 14""" c) 182000 d) 802200
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1%rea% o3 ,nergy ,33iciency
!
Paper 1 –Set A Solutions
61 One (9h o3 e*ectricity is e+%i/a*ent to how many heat %nits in 1t% >
a) A7: b) 8:0 *8 6:1! d) 12000
6! The o;one *ayer in the stratos.here acts as an e33icient 3i*ter 3or ____
a8 Solar '-F + rays b) H"rays c) =amma rays d) F5") rays
66 9hat is the heat re+%ired to me*t 2 (g o3 ice 3rom Iero degree to *i+%id water at Iero
degree in (J at atmos.heric condition>
a8 64! b) 7520 c) 1:0 d) 1080
6: ) centri3%ga* .%m. draws 12 m
!
Bhr. D%e to *ea(ages 3rom the casing o3 the im.e**er a
contin%o%s 3*ow o3 2 m
!
Bhr is *ost. The e33iciency o3 the .%m. is 55@. The 3*ow at the
discharge side wo%*d be
a) 8.7 m
!
Bhr b) 12 m
!
Bhr *8 1" B
6
@hr d) !.: m
!
Bhr
6/ 9hat is ,$40>
a) ,nergy $a/ing 4om.any b) ,nergy $o%rcing 4om.any
*8 EnerAy Ser<i*e CoBpany d) ,nergy $ection o3 4om.any
66 9hich o3 the 3o**owing is the most acc%rate instr%ment 3or s%r3ace tem.erat%re
meas%rement o3 the hot .i.e *ine>
a) Thermoco%.*es b) -yrometer
*8 Lea2 type *onta*t therBoBeter d) )** o3 the abo/e
64 ) .ath is characteri;ed by 7 .arameters s%ch as ,$ K ear*iest start time2 ,? K ear*iest
3inish time2 6? K *atest 3inish time2 6$ K *atest start time. ) .ath is critica* i3
a) ,$ K ,? or ,? K 6? 98 ES 1 LS an; EF 1 LF
c) ,$ K 6$ or ,? K 6? d) 6? K ,? and ,? K 6$
6# 10 &9h o3 e*ectrica* energy is e+%a* to ______tonnes o3 oi* e+%i/a*ent>
(45 o3 oi* K 102000 (4a*B(g)
a) 8:0 98 "5#6 c) 82:00 d) 8:2000
6> 9hich o3 the 3o**owing is a non renewab*e energy >
a) $o*ar b) 9ind c) =eotherma* ;8 Nu*lear
:" ) 3%rnace she** has to be coo*ed 3rom 0
o
4 to 50
o
4 by circ%*ating coo*ing water. The
mass o3 the 3%rnace she** is 2 tonnes2 the s.eci3ic heat o3 3%rnace she** is 0.2 (4a*B(g
o
4.
9ater is a/ai*ab*e at 2
o
4. The ma'im%m a**owed increase in water tem.erat%re is 5
o
4.
Neg*ecting the heat *oss to s%rro%nding2 the +%antity o3 water re+%ired to coo* the 3%rnace
she** wo%*d be
a8 6!"" .A b) !000 (g c) 1700 (g d) 2800 (g
:1 9hich among the 3o**owing are e*ements o3 .roEect management
a) managing reso%rces b) managing time and sched%*e
c) managing costs ;8 all o2 the a9o<e
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1%rea% o3 ,nergy ,33iciency
7
Paper 1 –Set A Solutions
:! -ro.osed new techno*ogies2 .rocess modi3ications2 e+%i.ment re.*acements are the
e*ements o3
a) ?inancing b) contracting *8 te*hni*al ;esiAn d) 8m.*ementation
:6 The wor*d a/erage .er ca.ita 402 emission is ________ tons .er ann%m.
a) 0.! b) 2.2 *8 65#4 d) 7.5!
:: 9hi*e .*otting a L4F$F& 4hartG2 it is obser/ed that L4F$F&G d%ring .re/io%s month was
122 the same d%ring the c%rrent month wi** be
a) M 12 b) N 12 c) K 12 ;8 CanEt 9e sai;
:/ 9hich o3 the 3o**owing is not a d%ty o3 an energy manager.
a) Re.ort to 1,,
b) -ro/ide the s%..ort to accredited energy a%diting 3irm
c) -re.are a scheme 3or e33icient %se o3 energy
;8 SiAn an enerAy poli*y
:6 The ann%a* energy cons%m.tion o3 a .*ant in the re3erence year 200:B200A was 1 *a(h =J.
8n the ne't year 200AB20082 it was 1.12 *a(h =J. )ss%me no change in the .rod%ct mi'
and o%t.%t +%antity2 the .*ant energy .er3ormance (-,-) is
a8 F1!G b) 1.2@ c) ".1@ d) 4ant be said
:4 9hich o3 the 3o**owing is not a 3*e'ib*e mechanism %nder Cyoto .rotoco*>
a) emission trading b) Eoint im.*ementation
c) 4D&. ;8 se*toral approa*hes.
:# 8n -roEect &anagement2 what does the 80B20 R%*e say>
a) !"G =or. *onsuBes #"G o2 tiBe an; resour*es
b) 20@ is tri/ia* and 80@ is /ita* wor(.
c) ?irst 20@ wor( cons%mes 80@ o3 time and reso%rces.
d) There is no s%ch r%*e.
:> 9hich o3 the 3o**owing is not a 3inancia* indicator:
a8 CPM b) 8RR c) N-5 d) R08
/" )n in/estment o3 Rs.52002000 is made 3or an energy e33icient .%m.. The .ower red%ction
achie/ed is 10.7 (9. 83 the energy cost is Rs.7 .er (9h. The .aybac( .eriod at 8000 hrs
o3 o.eration .er ann%m wo%*d be
a) 27 months 98 1# Bonths c) 12 months d) : months
…….……. End of Section – I ………..….
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1%rea% o3 ,nergy ,33iciency
5
Paper 1 –Set A Solutions
Se*tion – II) S3ORT (ESCRIPTI-E H'ESTIONS Mar.s) # 0 / 1 :"
(i) )nswer a** EiAht +%estions
(ii) ,ach +%estion carries Fi<e mar(s
$ "1 ) ! .hase )4 *oad draws 8 (9 o3 .ower at 700 5o*ts and 15 ) *ine c%rrent. 4a*c%*ate
the .ower 3actor o3 the *oad.
Ans S – 1
Supply -oltaAe o2 the SysteB ?-L8 1 :""
Line *urrent IL 1 1/ A
Apparent Po=er 1 6 0 -L 0 IL
1 1546! 0 "5:"" 0 1/
1 1"56>! I-A
! Mar.s
A*ti<e Po=er 1 1546! 0 -L 0 IL 0 ?Cos J8 1 # I7
Sin*e A*ti<e po=er 1 # I7
#5" 1 1"56>! Cos J
P F 1 Cos J 1#5"" @ 1"56>!
P F 1 "544
6 Mar.s
$ " 2 ?ind o%t the theoretica* ,nergy re+%ired in (9h to me*t one ton o3 stee* 3rom an
ambient tem.erat%re o3 !5
o
4. $.eci3ic heat o3 stee* K 1:0 4a*B(g
o
4. 6atent heat 3or
me*ting o3 stee* K !7.7 (4a*B(g
o
4. &e*ting .oint o3 stee* K 1:00
o
4.
Theoretica* Tota* heat re+%ired to me*t one ton o3 stee*
K $ensib*e heat O 6atent heat
$ensib*e #eat K P1000(g ' 0.1:0 (4a*B(g
o
4 ' (1:00 Q !5)
o
4R
K 22502700 (4a*
2 &ar(s
6atent #eat K (!7.7 (4a*B(g
o
4 ' 1000(g)
K !72700 (4a*
! Mar.s
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1%rea% o3 ,nergy ,33iciency
:
Paper 1 –Set A Solutions
Tota* #eat K 22502700 O !72700
K 22872800 (4a*
K 22872800 B 8:0
K !!1.1: (9h
1 Mar.
$ " ! 8n a boi*er tota* *osses acco%nt 3or 8@ o3 the 3%e* in.%t and amo%nts to 12:02000
(4a*Bhr. 9hat is the 3%e* Q 3iring rate in the boi*er i3 3%rnace oi* with a ca*ori3ic /a*%e o3
102000 (4a*B(g is %sed>
6et S be the tota* heat s%..*ied to the boi*er
S ' (8B100) K 12:02000
S K 202002000 (4a*Bhr
?%e* 3iring rateK 202002000 B 102000
K 200 (gBhr o3 3%rnace oi*
/ Mar.s
$ " 7 6ist ?85, bench mar(ing .arameters 3o**owed 3or either e+%i.ment or ind%stria*
.rod%ction.
1 (9Bton o3 re3rigeration (on )ir conditioning .*ant)
2 @ therma* e33iciency o3 a boi*er .*ant
! @ coo*ing tower e33ecti/eness in coo*ing tower
7 (9hB Nm
!
o3 com.ressed air
5 (9hB*iter in a diese* .ower .*ant
: (9hB&T c*in(er or cement .rod%ced (cement ind%stry)
A (ca*B(9h .ower .rod%ced (heat rate o3 a .ower .*ants)
8 (9hB&T o3 *i+%id meta* o%t.%t ( $tee* ind%stry)
(9hB(g yarn (te'ti*e ind%stry)
10 etcDD.
Any / o2 the a9o<e or e<en outsi;e this list F / Mar.s
$ Q 5 ) 100 tonnes .er day (t.d) ca.acity 4h*ora*a(a*i .*ant in the year 2005"0:
(Re3erence year) .rod%ced !02000 tonnes .er ann%m (T-)) o3 ca%stic soda with an
ann%a* energy cons%m.tion o3 0 mi**ion (9h and d%ring the year 200A"082 the
ann%a* .rod%ction was 252000 T-)2 with an ann%a* energy cons%m.tion o3 80 mi**ion
(9h. 4a*c%*ate the -*ant ,nergy -er3ormance.
)ns $ Q 5
-rod%ction ?actor K 25000 B !0000
K 0.8!!
1 Mar.
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1%rea% o3 ,nergy ,33iciency
A
Paper 1 –Set A Solutions
Re3erence year e+%i/a*ent K Re3erence year energy %se ' -rod%ction 3actor
K 0 ' 0.8!! K A5 mi**ion (9h
! Mar.s
-*ant ,nergy -er3ormance (-,-) K P (A5 " 80) B A5 R ' 100
K (") :.:A @
! Mar.s
$ " : 4a*c%*ate 3i'ed e*ectrica* energy cons%m.tion 3or a ro**ing mi** cons%ming !2002000
(9h %nits o3 e*ectricity to .rod%ce 500 &T o3 .rod%ct .er month and ha/ing s.eci3ic
e*ectrica* energy cons%m.tion o3 500 (9h B &T.
Ans S – 6)
Tota* ,nergy 4ons%med K ?i'ed ,nergy 4ons%m.tion O ($.eci3ic ,nergy
4ons%m.tion ' -rod%ction)
! Mar.s
?i'ed ,nergy 4ons%m.tion K Tota* ,nergy 4ons%med Q ($.eci3ic energy
cons%m.tion ' -rod%ction)
Tota* ,nergy 4ons%m.tion K !2002000 (9h
$.eci3ic energy cons%m.tion K 500 (9h B &T
Tota* -rod%ction K 500 &T
There3ore2 ?i'ed ,nergy 4ons%m.tion K !00000 " (500 ' 500)
K 5000 (9h %nits
6 Mar.s
$ " A 9hat are the ad/antages with L$im.*e -aybac( .eriodG techni+%e and a*so *ist down
the *imitations o3 TRet%rn on 8n/estmentU techni+%e>
Ans S – 4
$im.*e .aybac( .eriod is wide*y %sed in/estment criterion and o33ers the 3o**owing
ad/antages:
1V 8t is sim.*e2 both in conce.t and a..*ication. 0b/io%s*y a shorter .aybac( genera**y
indicates a more attracti/e in/estment. 8t does not %se tedio%s ca*c%*ations.
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1%rea% o3 ,nergy ,33iciency
8
Paper 1 –Set A Solutions
2V 8t 3a/o%rs .roEects2 which generate s%bstantia* cash in3*ows in ear*ier years2 and
discriminates against .roEects2 which bring s%bstantia* cash in3*ows in *ater years b%t
not in ear*ier years.
66 Mar.s
The *imitations with R08 techni+%e are:
8t does not ta(e into acco%nt the time /a*%e o3 money.
8t does not acco%nt 3or the /ariab*e nat%re o3 ann%a* net cash in3*ows.
! Mar.s
$ Q 8 9hat are the ! time estimates %sed 3or constr%cting -,RT Networ(> 0ne o3 the
acti/ity has ! time estimates o3 7 wee(s2 5 wee(s and : wee(s in a -,RT Networ(
diagram. ?ind o%t the e'.ected time to com.*ete the acti/ity and itGs /ariance o3 the
acti/ity.
i) Three time estimates are:
a) 0.timistic time
b) &ost *i(e*y time
c) -essimistic time 1 Mar.
,'.ected time K (0T O 7 ' &T O -T)B :
K (7 O 7 ' 5 O :)B:
K 5 ! Mar.s
5ariance K W(-T Q 0T)B:X
2

K W(: Q 7)B:X
2

K 1 B ! Mar.s
…….……. End of Section – II ………..….
Se*tion – III) LON$ (ESCRIPTI-E H'ESTIONS Mar.s) 6 0 1" 1 6"
(i) )nswer a** Si0 +%estions
(ii) ,ach +%estion carries Ten mar(s
6 " 1 (i) 9hat is meant by 3%e* s%bstit%tion>
(ii) ) thermic 3*%id heater with ?%rnace 0i* is re.*aced by a 4ocon%t chi. 3ired boi*er
ha/ing the 3o**owing detai*s. ?ind o%t .aybac( .eriod based on the cost sa/ings.
)/g. e33iciency o3 o*d system (?%e* 0i* 3ired boi*er) K 80 @
)/g e33iciency o3 the new system (4ocon%t chi. 3ired boi*er) K A0@
=45 o3 ?0 K 10200 (ca* B (g
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1%rea% o3 ,nergy ,33iciency

Paper 1 –Set A Solutions
=45 o3 4ocon%t chi.s K 7000 (ca* B (g
#eat d%ty K 15 6a(h (ca* B hr
)nn%a* o.erating ho%rs K A000 #o%rs
8n/estment o3 new system K Rs. 100 6a(hs
4ost o3 ?0 K Rs. 20 B *itre
4ost o3 4ocon%t chi.s K Rs. !000 B Ton
$.. =r. 03 ?%e* oi* K 0.0
Ans – LF1
i8 Fuel su9stitution is su9stitutinA e0istinA 2ossil or other 2uel
=ith Bore e22i*ient an; less *ost @ less pollutinA 2uel su*h as
natural $as +ioAas an; lo*ally a<aila9le aAro resi;ues et*5
! Mar.s
ii8 E0istinA SysteB) TherBi* Flui; 3eater =ith Furna*e Oil
$C- 1 1"!"" .*al @ .A
A<A5 TherBal E22i*ien*y 1 #" G
3eat (uty 1 1/ la.h .*al @ hr
Fuel *onsuBption @ hr 1 ?1/ 0 1"""""8 @ ?"5#" 0 1"!""8

1 1#65# .A @ hr
! Mar.s
Annual Fuel ConsuBption 1 1#65# 0 4""" 1 1!#66"" .A
Annual Fuel Cost 1 1!#66"" 0 !" @ "5>"
1 Rs5 !5#6 Crore
1 Mar.
Ne= SysteB ) Co*onut Chip 2ire; 9oiler
$C- 1 :""" .*al @ .A
A<A5 TherBal E22i*ien*y 1 4" G
3eat (uty 1 1/ la.h .*al @ hr
Fuel *onsuBption @ hr 1 ?1/ 0 1"""""8 @ ?"54" 0 :"""8

1 /6/54 .A @ hr
! Mar.s
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1%rea% o3 ,nergy ,33iciency
10
Paper 1 –Set A Solutions
Annual Fuel ConsuBption 1 /6/54 0 4""" @1"""1 64/" ton
Annual Fuel Cost 1 64/" 0 6"""
1 Rs5 151!/ Crore
1 Mar.s
Annual Cost Sa<inAs Rs5 Crore 1 !5#6 – 151!/
1 1546/
Pay +a*. Perio; 1 ?15"" @ 1546/8 0 1!
1 65> Bonths
! Mar.s
6 " 2 ) com.any wants to in/est Rs. 70 6a(hs in a .roEect with an ann%a* ret%rn o3 Rs. 8
6a(hs. The *i3e o3 the .roEect is 10 years.
1. ?ind o%t the 8RR o3 the .roEect.
2. 83 the interest on ca.ita* is 10@2 is it worthwhi*e to in/est in the .roEect.
Ans5 LF!
:"""""" 1 #"""" K1@?1518
1
L 1@?1518
1
L1@?1518
!
MMM1@?1518
1"
N
! Mar.s
The IRR o2 the proDe*t is 1/G5
6 Mar.s
!5 Sin*e the interest rate on *apital is 1"G it is =orth=hile to in<est in
the proDe*t5
! Mar.s
6 " ! )nswer the 3o**owing
a. Di33erentiate between renewab*e and nonrenewab*e energy with e'am.*e.
b. #ow acid rain is 3ormed> )nd what is its im.act.
c. 6ist two designated cons%mers as mentioned in ,4 )ct 2001
d. ,'.*ain brie3*y abo%t 4*ean De/e*o.ment &echanism >
Ans=er
a. renewab*e energy is energy a/ai*ab*e 3ore/er. 8t does not de.*ete with time.
,'am.*es are so*ar2 wind2 geotherma*2 hyde* etc

Non renewab*e energy is *imited. 8t de.*etes with time and cons%m.tion.
,'am.*es are oi*2 coa*2 nat%ra* gas and n%c*ear
!5/ Mar.s
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1%rea% o3 ,nergy ,33iciency
11
Paper 1 –Set A Solutions
b. )cid rain is 3ormed when $02 and N0H re*eased 3rom comb%stion reacts with
water /a.or in atmos.here to 3orm s%*.h%ric and nitric acid which then
.reci.itates as acid rain
)cid rain damages the soi*2 *a(es2 ri/ers2 b%i*dings2 ca%ses corrosion2 a33ects
h%man hea*th etc.
!5/ Mar.s
c. )*%mini%m2 3erti*i;es2 8ron and stee*2 4ement2 -%*. and .a.er2 4h*or a*(a*i2 $%gar2
Te'ti*e2 4hemica*s2 Rai*ways2 -ort tr%st2 Trans.ort sector2 -etrochemica*s2 gas
crac(ers2 Na.tha crac(ers2 .etro*e%m re3ineries2 Therma* .ower stations2 #yde*
.ower stations2 e*ectricity transmission com.anies2 distrib%tion com.anies2
4ommercia* b%i*dings and estab*ishments.
!5/ Mar.s
d. 4*ean De/e*o.ment mechanism is a .rocess by which )nne'e 1 co%ntries
(de/e*o.ed co%ntries with greenho%se gas red%ction committment) .ro/ide
3%nding or s%..ort 3or .roEects in de/e*o.ing co%ntries2 which tend to decrease the
greenho%se gas emissions.
!5/ Mar.s
6 " 7 Fse 4F$F& techni+%e to de/e*o. a tab*e and to ca*c%*ate energy sa/ings 3or 8
months .eriod. ?or ca*c%*ating tota* energy sa/ing2 a/erage .rod%ction can be ta(en
as A2500 &T .er month. Re3er to 3ie*d data gi/en in the tab*e be*ow.
Ans) L :)
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1%rea% o3 ,nergy ,33iciency
&onth )ct%a* $,42 (9hB&T -redicted $,42 (9hB&T
&ay 1!11 1!!5
J%ne 1!08 1!!5
J%*y 1!:8 1!!5
)%g 1!!7 1!!5
$e.t 1!!8 1!!5
0ct 1!51 1!!5
No/ 1!22 1!!5
Dec 1!20 1!!5
12
Paper 1 –Set A Solutions
Month
A*tual
SEC
.7h@MT
Pre;i*te;
SEC .7h@MT
(i22 1 ? A*t F Pre; 8
? F 1 Sa<inA 8
C'S'M
? F 1 Sa<inA 8
MA% 1611 166/ F!: F!:
,'NE 16"# 166/ F!4 F/1
,'L% 166# 166/ 66 F1#
A'$ 166: 166/ F1 F1>
SEPT 166# 166/ 6 F16
OCT 16/1 166/ 16 "
NO- 16!! 166/ F16 F16
(EC 16!" 166/ F1/ F!#
# Mar.s
Positi<e sa<inAs i5e5 sa<inAs in enerAy *onsuBption o<er a perio; o2 eiAht
Bonths are !# 0 4/"" 1 !1"""" .7h
! Mar.s
6 " 5 (a) #ow does the 8nd%stry2 Nation and =*obe bene3it 3rom energy e33iciency .rograms>
(b) 8n a carbonation o3 a so3t drin(2 the tota* +%antity o3 4arbon dio'ide re+%ired is the
e+%i/a*ent o3 7 /o*%mes o3 gas to one /o*%me o3 water at 0
o
4 and atmos.heric
.ress%re. 4a*c%*ate (8) the mass 3raction and (88) the mo*e 3raction o3 4arbon dio'ide
in the drin(. 8gnore a** com.onents other than carbon dio'ide and water. Ta(e gas
constant K 0.0820:
Ans L / ?a8
EnerAy e22i*ien*y 9ene2its 2or In;ustry Nation an; $lo9e are as 2ollo=s.
In;ustry)
Re;u*e; enerAy 9ills
In*rease; *oBpetiti<eness
In*rease; pro;u*ti<ity
IBpro<e; Cuality
In*rease; pro2its
! Mar.s
Nation)
Re;u*e; enerAy iBports
A<oi;e; *osts *an 9e use; 2or po<erty re;u*tion
Conser<ation o2 liBite; resour*es
IBpro<e; enerAy se*urity
! Mar.s
$lo9e)
Re;u*e; $3$ an; other eBissions
Maintains a suita9le en<ironBent
! Mar.s
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1%rea% o3 ,nergy ,33iciency
1!
Paper 1 –Set A Solutions
Ans L / ?98
.
1asis 1 m
!
o3 water K 1000(g
5o*%me o3 402

added K 7 m
!
?rom =as e+%ation -5 K nRT
-5 K nRT
1 ' 7 K n '0.0820: '2A!
n K 0.1A85 mo*es
&o*ec%*ar wt o3 402 77
9t o3 402

added 0.1A85 ' 77 K A.85: (g.
&ass 3raction o3 402 A.85:
(1000 O A.85:)
1 454>/ 0 1"
– 6

&o*e 3raction o3 402 K 0.1A85
1000 B18 O 0.1A85
1 65! 01"
– 6


/ Mar.s
6 " : The 3eed water to a boi*er enters the 3eed water tan( at !2
o
4 where steam 3rom the
same boi*er is mi'ed into it. The mass o3 the steam mi'ed is !@ o3 steam o%t.%t 3rom
the boi*er. The boi*er o.erates with 2@ contin%o%s b*ow down. The entha*.y o3 the
steam is 5! (4a*B(g and s.eci3ic heat o3 water is 1 (4a*B(g
o
4. ?ind o%t the
tem.erat%re o3 water a3ter the 3eed water tan(. Neg*ect heat *oss i3 any.
Ans) L 6
Ta.e 1"" .A Fee; =ater AoinA into the 9oiler
7ater lost ;ue to !G 9lo= ;o=n 1 ! .A
SteaB Aenerate; 1 ># .A5
Huantity o2 steaB 9lo=n into 2ee; =ater heater 1 6G o2 ># .A
1 !5>: .A5
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1%rea% o3 ,nergy ,33iciency
17
Paper 1 –Set A Solutions
Huantity o2 2ee; =ater to 2ee; =ater heater 1 1"" – !5>:
1 >45"6 .A

/ Mar.s
AssuBe the =ater teBp a2ter 2ee; =ater heater 1 T
o
C
Enthalpy o2 inlet 2ee; =ater at 6!
o
C 1 B Cp Ot
1 >45"6 0 1 0 ? 6! F "8
1 61"/5>! .Cal
Enthalpy o2 e0haust steaB Bi0inA =ith 2ee; =ater 1 !5>: 0 />6
1 14:65:! .Cal
Total enthalpy at the inlet o2 2ee; =ater heater
1 61"/5>! L 14:65:!
1 :#:>56: .Cal
Enthalpy at the outlet o2 2ee; =ater heater 1 1"" 0 1 0 T
As there is no heat loss
Enthalpy Inlet 1 Enthalpy outlet
:#:>56: 1 1"" T
7ater teBp a2ter 2ee; =ater heater T 1 :#5:>
o
C
/ Mar.s

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1%rea% o3 ,nergy ,33iciency
FEE(
7ATER
3EATER
+OILER
1""G
1"".A
T
o
C +lo=;o=n
!G
!.A
>#G
>#.A
6G o2 ># .A
!5>: .A
/>6 .Cal
1"" – !5>: .A
>45"6 .A
6!
o
C
15
Paper 1 –Set A Solutions
Note ) Flo= ;iaAraB is not *oBpulsory it is Dust 2or un;erstan;inA the
situation5

…….……. End of Section – III ………..….
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1%rea% o3 ,nergy ,33iciency
1: