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Transcript of GATE Chemical Engineering 1992
8/20/2019 GATE Chemical Engineering 1992
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IGATE 1992
I U( (I
CHEMICAL
ENGINEERING
SECTION A
SOMarks
Fill in
the.blnaks .
a.
' 'he steps 1 1oiled
in the
manufac
ture
of
pbeno
l by chlorobenzene caustic
J l T < ) C C ~ ~
are
ch
lo
rinat
ion or bon
7.Cile.
and
T
:::-
e_ p_o_cess-:-s- compe-.i"'
i
"'.e "-:1-en.
-,l-o-
·
cost
cltloMe Is avrulab
l
e, T1u
s
means
hal the
proces
s must be
cou
pled lo a
~ - _ _ _ - -
a n t
b. For manufacture of slyrene the maJOr
rs11
ms tcnals
are and
;
One
rmportant
co
po
ly
me
r
of
styrene IS Which IS
1
dd
y
us<.\d
in
the
man ufacture or
nut )mobile tyres
e Select the
appropriate name
from the
rigbl
h
i111d co
l
unm
.
against the
processes
memiorted
:
(1) H,
from
light r o l e u m stock
( II ) Hrgh oetanegnsoline
from
nnptha
(lU ) G a s o h n ~ frtlrn g11s oil
(TV) Petroleum
Cl)ke
fro m res
odue
(A)
Pyr'Ol
ysis
( l:l)
Ca
tnl
ytic
ctacking
(C)
Platfonning.
(0)
Steam rcfonnin.g of
napiba
d. n
electrostatic
prec1prtator
ts
normally used lor separating
particl
es
from gases \\hoo
(A
) PartlCie s1ze IS greater
th
an Lmm
\B) Particle
SIZC IS
less
UUIO
I
micron
0 Gases contain g c<
m
cenlmt
l
on
ofcarbon monoxide
(D) Gases con
taon
erv hrgh
concentration
of
so
lid
s, •
Fill
in the blunks
:1.
It is
desired
10 rnnke I
(lO
kg
or
u
solution containing
salt
b)' mixing
solution
A c o n ~ a i n i n g 25% salt and
s o l u t i ~ ; > B cool llni'ng 50°
%
sal
t.
The
mas
s
In Lg of
solution A
rcquored IS
b, 1.2 g
1\
toms of carbon and 1,5 g
moles
or g e n
are
reacted
to
gil'e I g mole
or carbon dioxide. The limitin&
reactant
is
. The per
3.
cent excess reactant supplied is
c. A gaseous
reac
tion A
t
28
+
C takes.
pl
a
ce
isothennnll) in a constant
pressure rea
ctor,
Starling
With
u
gaseous m i ~ t u r e containing S<l •A
(res1 onens),
the
111ll0 of
fi
nal
to
1tt
ial
volume
is
round to he 1,6 The
pcrcen tagecorwersoon ofA is
(A) .30
(B) 50
(( )
(i\)
(D) 74
d. A
multiple effect <.waporator
bas a
capacny to
proce
ss 400tl kg of solrd
caustic
soda
per
day
"
he
n
it is
Iron
ltl
'}o
tQ
2.5
so
lods.
The water
el'nporated
in l.g per day
is
\A) 600
(B) 24.000
\C )
60
,tl0()
(D)
48
.Wil
Ch
oose the correct alternate •
il
.
Theml l:hanicnl energy equaOun
(
( - ) (''' +p) tlrl ,, ,,
•
f.i
•
::o
- +w - - . -
2 ; 2
P
m lm
h
ns peen
obtai
ned
under 1vhich
of
tM
fo ll
o
11in
g assu
r'np
tions
(A)
the
llaw
is stead)
(B) the llow
rs
incomp ressoble
(C}
no viscous work is being done
(D)
(Joints and I are on
the
same
streamline.
b_ A
sphe
rical partide 1S f i i l l u ~ g slowl)·
Ul
a
visco
us
li
q
wd such
R
ev
no
ld
s
nwnber
Is es
s
than 1. Wh1ch s1aiemenr
is corre
c1
for this SJhlahon
'
(A) Inertial and
drag ro
rces are
1mponant
(B) Dr
ag
,
\ r l l ~
n a l
Md b u o y a o ~ y
forces
are important
(C)
Drng
f o r e < ~
and gra1 ltat1o
nal
fo
rres
ana i
mporlan
t
(
D) one
of
ibe
abore
c. As th
e veloc1l\
V nnd Utus th
e
Re)'l10i
ds
n u
m b
~ of
u
Oow past
o
sphere increases from ve
ry l
o11
'ruues.
the dras,
force
for Re << I
(A) i
nc
reases linenrl) iib \1
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ffi}
d ~ c s l f n e • r l v with V
(
Cl
decre;,se. as v > ·
CD)
none ofUtooc.
tl.
Titc W"bcr numlx"
CAn
be usell I
<l111imate
(.\) mliQ o f i n c : r t i ~ ~ n i l surfac<>tensinn
forces
(B) rntio
of
n<:rlin and . : c > o n p ~ ~ · i l i t y
forces
(('I rAtio uf' mortial
and
ccnltifugal
b i t e ~
(C") t:ttin 1•f .. and \'iurfacc
ten$
on fnn..'ef;
.
C
htJQsc tile
correct J Item ate ;
n. A partl< lo A
of tl
inmoter
10
micro&.
setllos 111 an oil l l f spedlic grnvity 0. 1
nnd
\iscoshy
10
poise under
Stokes
Law. A pat tide B will• diameter 20
truc.rom •o
ttling
in
the
• m
oil will
v
e settling
Yelocity
tA)
s;une n•
thatofA
(B) o o ~ o u d J •
as
that orA
(C ) twic<: •• th.1i of, \
(0)
four-times
o.• tltai of;\,
b.
\Vrile o • ~ ~ J'or
:
lA) Bnud's lllw ofsi:a: t·oductiou
1B)
Fi
ltration
under
constant pressure
c. M•tclt the following :
II) C
ut
diameter
(ll)
Spccl io : a l < e r.:;s-ist:mee
(ill) Sfzc Reduction l ~ t i o
(1 \
)
Angh:
offn
temni
Friction
(A) Filtrnti<m
(131 Cy
clone separllli O•
(C\
Stomgc
ofgoli
ds
(IJ)
d
< During \ \ : l . ~ h i n g
11f i l t « ~ ~
the end uf
~ n - l >
p o : . < ~ = nltroiiiJU
,
the
rot.c
of
wn•h in
g t <
ltta
ls
lhc
(
I \
)
rltte
offi
llr.Hi
<m t i m ~
zem
(Bl
rate q llllr•t
ion at the end c)r
Liltrllllon
lt l tote
of
fiHrotion
whc:n
ha lf t h ~
l i l t r n t ~
h ~ s
be."'
~ t . i n c : d
rule of Glttali<m at the end
of
Liltrntion. but
d<Jc""""""
1vitl• time
s
ub
se<(lltntJy,
Choose tlte correct l t e r n a l I
a. In • heal
cxch3n
gcrWill
>
•L:3m out>lde
the
tub
es. •
Liquid gel•
bcnluct to c
w
hen
ill now
Yelocity
111 the
tub
..
IS
2
mls. ·tftlJe.
now
velocity is •educed to I
s
otl1cr tJ1ings
remaiuiH , t u
same.
G
7.
J Ut i)
tltc
lemperoture of the exit
liquid
will
bl>
(A)
l<:s•
thon 45°(
(B) c ~ u o l l o •WC
(C"l
greater rh•n 4S•C
{0)
l 1 1 i t i ~ l l y
dctrl: k'C$ and rtmain•
conswut ll•cJttJ/lc,r.
b. Indirect 1 >:11ltnc1 hcot excltongc't" 01-c
preferrtd over d i ~ l h
eal
e.>«:.ftan
gers
bCC.1USC
(I\ ) heat
t m n ~ f c r
c < > e f l j c i c n t ~
are
high
(B) t l ~ e r c
i•
no risk
()f
cm
ttnm in•liQn
{(') then:
i• n11
mist
l'
nrm ntil)n
(lJ) of
"'JUipment
i; lowc:r
<:. To
JniliAtco boiling
of
n liquid. I l l ~
tcmpornl\111
of
tho heoled surface. if
smooth will be
(higher/lqwer) lhan for • commercial
or
a roughened s ucfaco.
d. 'l'he
ndvanl.lRe
of
backwMd-foed
multiple-etl'ecl e v a p o r o r s oYer
forwnt'd·
foed unit; ls
tbnl
(A) heal scnsltiyc matcrinls can bc
h•ndled
IBJ there
is no additional cost
of
P"'"l''"
C
mo•t n l r a t l
ic
1
uor
is nl
bighestlemperattlro
(D) equnJ be.'lt trnnsf.:r oo<:fficients
~ x l s iu ••nrious effects.
Fill rn he
blanks :
a,
In
•t
ryi
ng
·a
con
hli
nin.g
moi•ture
uoov<
th
e eriti i ul mol,w.rc
cOnte
nt, the
number
of Jee.rec:s C)f
f,-.,edom
IJ
b. In the 1\
n b e . -
l'hlclc tliagram fvr
blnacy
dis tillation.
\'t:l1lcal feed
line
n : p r c t . c r t t ~ teed
und
huri2onlnl feed
l i n ~ ttprel ellb
teed.
c. number in
mass transfer
eom:spon L• to
Nt1 15elt number
iu b o ~ l
lt311
sfer and numllCr I()
l'randt
hlltm
b<:r
.
d. Ill sma ll cb lumn.1- local elfodtncy i•
Murphree e f l i c i ~
tn
'"o-rg_e_ <X l-;1-umns lcoe•l
elfioieJ><Y
is
1\ lurplu·ee efficiency,
Cbo-o-
$o
...,.
h
_e_cor:rccl :.ltcrnnl• •
a. Write "''P"'•••ons.for
(A) Van ·, Hon· oquahon
(.B) Vander Waals 'ruat
iou orS tole
b.
Durmg Joulo-Tiwm e:xpon3io11
of
~ ~ ( $ .
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9
~ Entlllll
py
remains consiBnt
()3) Llnll'OP¥ r ~ ' l l t a i n s COJI itar
tl
(c;) Temperature Temalns c'Qn$tant
(D)
None
of the above
c. Tba necessllty and sufhcient c<lttditiott
for
equ.ilibrill111
between two plll1Ses is
(A.)
concentrdtion Qf each contponenl
should be same in tlte two
phases
(ll)
t h ~ lt'tllperature of <>ach phase
~ h < • l t bes•me
C)
the 11re ;Wre
should be
S<une in
1he
two phases
(D) tlte clumlical potentialofeaclt
C i m l p \ V J e n
s'l\o
u)d
be
S<mll in
Llte
tlyo phases
d. For a single. component,
two
-phase
m x l ~
l}w nunlbat <lf itlih:penJent
v a r i H b l ~ prop
rti s ate
{.b,.) two
(B)
p i t ~
(C) ?.ero
(D)
three
Choose Ue c'Qrrectalll"l1lule :
a.
'Ti
te conversion
of
n .
reaf.)tlln
t;,
undergoing a JID.-1-order
-reaction,
at a
lima equal to
rl
we-
DJUCS me
.half life
ofUte reudioJil
is
(A) 0,875
(B) 0.5
(C) 0.425
D)
not
possibl<> lo c'ilctll.at.e hooanse of
m ~ u f f i c i e n t
data
U The llluts af frequency fuctoc in
A
c:heniLJSequati<111
{A)
are
l'he
sru.ne
·as th(ll;e
e>f.tlte
rare·
conslrutt
(B) depend
em
the·order ffbe l'l'Sction
((.) depenft <trl
tempe.r'J.lllre
, rm•ssure
etc of he reaction
~ arc
eyo
lcs
per
unit rune.
l .
Fill
ill
th
e
blanks
:
l ramition state '
theo
zy
npproaclm
O t ~
problem
of
calculating reaction rates
by
concentrating on,tlte ldeaof.
d. rill1ll he
blank
s:
h1 a ru'St-Qmer reactio,.,
~ P r o o u c t s
the reaction
bECOmes
s l o w ~ r >1s
it
l)r<t<:ee
ds,
because
Ute
concentration of
A artd tl
t
tn l
tle is
Choose th<>right answer;
a
Vllten a bare titcnnocouple
is
cowered
by
a protective sh
< atiL
t11e- response
bec<>me:.;
3 ei' 6
(Aj Fn
st;er
ruid
osci.ll MOJY
(B) Fmllerand
no
.n-QScillitlory
(C) Slower and
osd
lhllory
(p) Slowennd non-oscillatory,
b. ReiU:rllllgc
i.t
tto an ¢qllivalant llllity
fet dtiadt
di
o m :
c. An integrating
p r o t < e s ~
[lfl',sj -ill
conlroU"'i
by
a llr<lflor\ional .:inttroller
[K ;} The
m e n s ~
instrument and
th
o.
futal control olentent
resp<md
it
\stanmtteo\lllly
_ Firld li\e o
ffset
to
llowing a
unit
sler)ohange in load,
d. Slate. whether tlte fol.l
owi
ng
systems
IJJ'e
stable orunsmlile :
(i)
t
G{im) =-110" when IGCiMI= I
(i0
1
G()<O)= -180° wben IG
(io:>)I=0.588
,
10. (]ive HteMSwers ofihe.followi.ng •
a.
l a d i ~ t o tlte lll OSt apprQPriste material
for tlte hanJling of (he c l t e m i ~ a l ~ as
given below ·
c m i c a l ~
( )
'
Dilute Sulplmric
(ll)
Cvrlce
ntrated Flydroch
loricAdd
(Ill) Wetchlonne
(f\ ) C
om::entrated
Caustic
Soda
Mattlri.'ils
(A) K ~
b a t e
Ol) Nkkel
(C)
Lead
(D) Titaniwn
'b. FO : pi]>" lines ihmdling
fluid under
presstlle,
t:irctUnfere
ntial s t i f f e r u n ~
ring> are used for witltstandi.ng higher
intel1bl1Jl re< J<
IU'e,
{l'nte
or
Fills
e).
c. In 1he. layout plan; lor, a vacuum
dlstilla
bQlL
111UI:, operating at @
.tum
Ilg,
suppott< d
by
a blilt>metrie
N ttdenser, f ~ e \IJ)iJTCipriul.e
vJuc
e for
the location
of
VllCUUlll
drum
pr
coUecliiJg tlte cHsM1<Jtewl11 be
(A) atgrnund Jevel
(
B) 2111
111><1\\t> gt'Oun'll
(C) 5 m
abQve
ground
(D) I0 m above gml'md.
d. M a t ~ l t Ute.
following
:
(I) C a p i t a l i z ~
cc'st
(ll) \Jnnmortized vulua
(nl) Payout
pmod
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V) Coet index
(A) Comparing alternative1nvesln
wnl
u it. es
(
B)
Uprt1tmg CtlSI
dnln of eq
1UJlll1enl
(C)
Profttabilily
ev-aluation
(b) CQsl ncootmbitg
(F Rep)acemenL d " " l . ~ i o u
(F} Wo rking capital
SECTION
1 2 0 ~ )
I
I. 'J1u•
ooncentration of
SO, in the lltUHillle <
from a 'boiler tV'SS fowd to be 0.2 kg ';;\ at
N.T.P. Detern;i.Jle the concert1J)IJ:i:On.ofSO:.
in paris per millicm by
l n n t ~ ,
at P.
Ass •Jme t h ~ t the
gil.•es
are perfe<;t .
12. .Answer Uie fllllowing
} T h S 1 1 o r c ~
:
a.
The Qn
alysill Cf
l i t ~ J .aS entering- the
sec'Onda
f)' C1Jnver1< r
in
9
CQfllact
snlphur.ic ncirl pl811t .is 4% S02. J3
< ) . ~ , 1:'3% · , (l•olum e %). In t
he
<:Onve t1er s o is ,ucidised to so,. 'l'lie
gases l
eavmg
he converter
contaln
0,
45
% SOa
on au t
free basis
{volume ).
Calcnlate
1he percent
w nversion
<:>fS0
1
b. D.ry
methane
is bii.Oled with.
dry air.
Both are
at 2s
•c initially.
'rhe
llame
tempe.ranue
1s
1300 C,
1(
complete
combustion. Is assumed how Jnuch
axcess air is
being
used
? 'lite
reaction
C t L Z O 4 H O
Standard heat of
~ c t i 0 1 1 "' -8.028 ~
I0
5
J/g
mole of
OH. :reacted. Mean
molal specific heats
of
gases
betWeen
25
°C and
1300•c &' '
.
in
J/
(g
. mole)
( K) :
CO
a -
51.88
I·h0 - 40.45
~
3 4 . Q l
N
2=
J2.2 1
13. Aru;.wer th<t followiltg :
tt.
Wallrr
Is
forced
h;
to 1he
device
showrt
m g l t r e b e l o W ~ t
h e r o
e . , f
Iof6
0.15 lT
' tsec ihrouglt
pipe
A,
wJtile
oil
of
specific gravity ).8
for,-e
d
in i l l th
e
rate
ofO.OS
m
1
/sec through
lripe
B.
If
~ h e liqnid• .are ITIC<lmp rem'ble and
lom1 a IJ.omogeneous mixmre of oil
gl<bules in ·wale,,
wh>.tl
i ;· llie liVernge
v ~ o q and densi ty of [he m.biture
leaving throll l
•
pip
C
havmg
a
di;uneter
of
" 7 /
22
J11
For Oow over a llal
plttle
where'JJ, a
laminar bP lJld.'JJY
la
yer 1• present for
th,. ~ • e nh :tero presS1.1fl>gradien1; the
fllli"Jbotic
llfOfile l
br
\teloci ty U ,. given
by
u = y y for y s 8
u=Vu f o ~ ;y
1
0
r ind a; ar
td
,
.,
.
--
L
~
. .. _ ...
; ~ s . .-:.. ..
]< i\llliWSr lttefoll<>
"
in£:
a. Prutit:lcs o.f sve1'age .feed size
~
4
10
m are
crushed to an average
prnilu{'t sizt- of) •< J0'"' 1T1 nl t
he
ml
,e
of
l5 t.ons per hoOT. AI Ih
ilt
rnl.e the
crusher consun1es 32 kW ofpower of
w.
hic;h
7
kW m
fllil
'
lired
for
11111ning
tl
te mill
empty. what
wollld
be
01e
power &
wn;mmption
i
40
tolL ' _per
hllut of
this.
product s
.
further oru£ltcd
to
I ' 10_.
ru s i z ~
.iu l h ~
Slll
ne mill1
Assrune llllll Rittinaer·s law is
applicab le. -
b. A tillerl)ress
oo
n
lai.ns- 2()
frames, each
of 0.6
m.
by 0.6
m
f11Slde duneJtSion
'111- .6'llll.1es ate 1'>.02.5 m luck. 'rltu
press
l• equiwed wiLI1
l
il ld ~ u l t o n
plates for wliSh.ing. The l u w e
of
wrt
$h water
nsecl
is
l
0%
of
lhe filtrate
per cycle, The
time required
fur
filterin
g,
nt
,'On.stlmt.
pressrn:e
, is
2
h
OUJJi oy wJiich
time he IDUtle.< ·are
fuU , Washing
.s
done ·at
dte
same
p r i o i ~ I U ' e as filtering and ti
le
viso;osity
of wash water .is nearly
( : \ 1 ~
same as
tru t
of
he Jj.Jbute. Wltat l.s the time for
washing? Thc:re
is
0.05 m
of
cake per m
3
of illlrate, Neglect the
rc.-is
lmt
ce
of
he 1iltermedium .
15. A u . ~ \ v e r tlte following questions .
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. c o m
ot. Comider
~ infinite
pmll
el ¢ 1 1 .
Plat
e I is m:n
nL
1.ned • I 1227"C
and
pl
ate 3 il mtu
nta
i
ned ot
Euti.8ivilics ure
equ• l
to
thM <l"
a hla ck
hlldy. PIole 2
pl•c
ed
betwe
en plnr
e,
I
:mel
3; :md receive,; t"' he
nt
li'
CJ
m
~ t c r u C O i l Wllttl is Ute
ltmtpCI'
aiU
rc
of p into 2 'I
ll A nicke l steel rod S m OJ) ongjnnlly
al n b:mJlomiru
n;
31)0"(' i>
imoocr.<c
d
iu • li4uid
ol
H c
ror
wlticb
lh
<> L'O
liVt
div
c heat transf
er
coall
ici;;nt
is
1
0\J \\11m
2
K. Del
e111tin«
Ute ti
m
c-l'e(IUir
ed for Ihe
ro
d
to t
each 3 -
m p o u t u r of
150"C. (Hint: C•ku lote
the Bioi number
nnd nu
ke tho
necessa
ry assumpt
io
n).
P l < : $ ofnid,"el steel
K SOW/ru. K :
t>-
81100
kglm
1
:
I p= 0.5 J/k
g.
K.
1
6.
Answer the
ro
llo
win
g questjons :
<L Equilibr
ium
re.ll
liCJI\
$hir f
()t'
Lbe ~ t o m
lt
"J)t.on
e-oil· •ir
iS
givcu
by Y
: 2.'(
(Y
and
X nre
kg
-hepume kg .
nir a n ~ kg
hep
tan eik&"Qil re•pectivcly).
f'HI
n t . o i n i
0.005
p b n ~ · u
being U led as
ll> r re
ducing tht:
hep Ani
co
ntent
or
from
\
,10
to
()
.
021.:g-heplnnclkg
-sir
in • co olt
lnuo
\1$
co
unter-current k l l d hed
~ l . l l
W h
col
umn
n:q
uired to trc
ot
1
400
kW(hr) (m
1
tol' "'"PLYluwer cr
oss
i t l l i of
pure ni
r «m
lili
ning iO<:(>tn.nc
if Uo
c
tl"c
ull
"" nln
l•
transll:r
cnefficienl is
~ 2 0
kgl(
hr
) lm'
1
)
p<:r
unit
~ 1 1 1 t : n t
of Y
'r
hc: oil ra
a.:
C J T I < l l l
l•
31
00 \4 i(
br){m
1
) .
Solve
n
h. 'l'he fo
ll
o
win
g iltformnt
io
n l• av:ulublo
lrum Ut
e
reco rd, of a binlll')
Jraclioua tiug <:O lumo :
Fwd 180 kg-molell tt and
6 0 ~ •
ya
po
ro
se
d;
Dlsti iJ,,te = 100 kg
-m
ole br wl Ut 0.9 C
mole froctioo of tho moro • l i l
compone
t
Reboiler st...,m demand = 420 kgtlu-;
U.tent b
«o
t of
column
liqu
id = 3 10'
Jig
nlOi
c
lloHI
U.lent
or ,
teauo u•o< in
ro
huili:r -
22( 0 J/j .
(
nlcuiUie
(I) IJ)e Qpot
at
in£, ~ r.uin
:t
nd
, ur l
{i i th
e compos
iti
on of-v
a
por r i n ~ thai
pla1e
fro
m 11hich liqu
id W 6 W
cOr\tuin$ 0.7 mnlo
l'ra
otiun Qf the mb
l'
o
' ul•lile t t t p
c. l m
(),S m Chi
ck
CQnl
:tini
ng
SOt) ol'dry o c k m·
1
of original Wt.
~ l O t
ii
to
be dried al CQnownt dtying
w nditiOnM Th<' initiJ>l drying mte is
kgl(
hr
) (m
1
) at dtc initio
m
t u r e
<l 3
3°0. Th
e lin"Id
l)
'ilig
rotc
ill
I kgl(ltr) m JJl 6 ~ ~ final mvislw e
contanL The
CjUilibrium moisture
co
ntent
s neg l
igible.
If drying is fr
om
two htr
ge s
url'a
= iltld i f cb
e
dry
in,g
in t h ~ filling rntc p<riud
t.
prnportionnl to the lh:c moi sture
e n l , o lcnlate the lolnl
dryi
ng
time,
AIJ mois luo
'e
co nlen ls ore OJI th e dry
.
Two, s x MAJUtS
QUDTIONa 1
7-20)
11
. All.\<wc
nl
c following :
•· 10
6
Joul
es
of
ate
r a r u ~ m : d ti·om
• "'-"t:niOr al ~ to
ll1l
gffie
lh;,t
x : r o t ~ on lhc C'amol cyd
o.
Th .;.
cop oc
rejects
hQnl to • r(.-,urvuit ol
27"C. Dete
rm
ine
d•
e
tb
etJn"l
effiai
ency of the cycle
~ n d
the wor
li;
don"
by
Oc
e
cnglM.
13
nw
rks)
b.
An
tnvo::
nt
or
clnims 10
h
ow duvoloJ"'<<
o rofnserntion unit whc ch mn
int:>in
• lhe
rd h genned spa
:<> at
- 3"
(" wh ile
opor3tinj in • room "'l
u:rc
tlce
tcmpct:alun: it
2 °
C nnd wlo.::h
ha
s •
ooefficient of perl'o
ml3n
ce of 9,5, How
do you evaluate-his claim? {3 marks)
.:. Consider the compt'tssion of ail' from
UY Pa
;\(
27'C Ill 3 10
6
P ~ In •n
iuo•l
tw ll-•lt{ge
n t p m
~ o r
with
inl.:t'C Wiing,
o \ . , ~ u m
U1
lll
th"
m
o r : ~ l u
..
r
lht: u
it
lcnv
in
J
th
e
intctCAlulor is
aiM>
27 C •nd thnt
lloc
op1imu111
~ g e
n : . . ~
u r < : is used,
Tbc; c o t n c ~ ; ~ c • i < w 3nd
Ul t I
>O
iyltt)l)iO CXf
l()ll
eni ii is [ ,31) fhr
both D e t o r m the
\\
Ork of
~ m p r e s s i o
per
kg of air, (tl mnrks)
IK Answer tho l>
ll
uwing -
a.
& plsin
in nne or
t
"o
li<nlcncc.,. why
Ute g ~ t c : r n e n t l o .,..,
( i)
'f]l
e
- s t a t
•ppr
ox im
;
tlinn
i
q"
8/20/2019 GATE Chemical Engineering 1992
http://slidepdf.com/reader/full/gate-chemical-engineering-1992 6/6
w w
w . e x a
m r a c e
. c o m
rodtc
al
c)twq
mcc
hanu
nt illv
olv
ll$S
Wnp
tion
that
sinc
e tlt
e
ronc
entrn
li oll
of
any
par
ticula
r
al
l1mic
or
radi
cal
i < l is
oo
im
all 1
11at
tl
can be
tak
en t
o be
(2 tn
ad:s)
(
i:i) C
oal
f
\)nJI
lfl in
Loxpl<
:lsive
mixtu
re
w
itlt a
ir
a
t o
rdimu
y
tern
perat
ntes
w
henlt
l
fine l
y diVtd
cd fo
rm .
(2
marl:
s)
(
)
lnl
tibitio
n
JB the J
li'OCC
fS whe
re the
ra
te-of
reac
tion
11
by
low
t'riu
g tho
tcmJX
:nuu
ro .
(
3 m
arks
)
b.
A l
lomo
geneo
o E
iquid
phas
d
r
eactio
n
~
R
;
, .
. .
k
c .=
Iukes
pla
ce witl1
S
O c
onven
;ion
Ul a
w
eU
r
eacto
r
' f l l O
isolh
erm a
lly.
Whu
l w
ill b
e r h
e
conv<mm:m
it
Ute
reuctN ts
replacYd
by
n
v
ug
flo
w lyl
'e of <'<\lU
ll
size
a
ll e
lse
rema
irung
the s
ame1
(
3
rna
s:ks)
o
C
mst
del: tb
e
l el
·\ lf e
lem e
ntal)
•
react
iow:
A
4
.
n
:
c
A
t
time
I
=
0
, n ba
tch
react
or
IS
fill
ed
with
a
mix
ture o
A
an d 0
W
hat
is ilie
re ls
tim bctw
CCII
th<'
oonc
cntrat
io IS
of
B
andD
after
n
time
I?
(
3 ma
rks)
A.
n.-we
r tbe
f<ilowllll
qu.
.'Stions
a ,
A thC
illiO
mcte
r f
oDov.-s
ti
m-or
der
dynam
ics w
ith
a tim
e
oo
n
l 1anl
0 2 m
in .
l
t is
p i ~
i11
11 te
Jnper
nrure
ball
t at
Joo•
c an
d is aU
o
wl
'll
tn
reach
ste
-ad)
'
stal
e. lt
is
sudd
enly
b·uu
sfenc
d
to
unol
l
1e
r ba.lh
ul 15
0 C
n.l ti
me I
=
0 a
nd
is
leJ1 t
ht)J: e
f1
1r 0
2 min
II
y
retu
rned
to
Ute or
ig ina
l
bath
a
t 1
oo•c.
C
'al
culate
r
endin
g' at
20
o
C
(i )
I
= O
J mm
(
ii )
I = O
m
in.
6mark
s)
b.
~ n n i
:
(
i) Th
e ma
. mu
m 1\IDI
I fo
r l111lb1
e
op
erntiC
'Il.
( i
i)
1
1 t
e
C
Orre
JlOPd
ing
freq
uenc
y
Qf
o n
~ ~ ~ r
( (> 1TlJ
1b)
Am
wer
tlte fu
llowm
g •
a G
ive
the
e;>.. ]J.t
'l$8tC'J
tt
~ th
e tw
o
princ
ipal
stres
ses
fo r
a ~ y ~ n
d n c a
~ u r
clo
sed
at b
oU
t
e
nds .
(2
mark
s)
b
. For
a s
as
cylin
der,
dcSts
ncd
01 1 th
e
• f
hin
Cyli
nder P
rinc ip
l
e'·, c
alcu l
ate
the-
tlticl:ness
of
o
acnmless
cylinder
u
nder
th
e f<lilo
whl8
con
dition
. :
o
f N.
g
as
in
d
te ey
lutde
.
=
100
10
5
N
Te
lliile
st
re 'S
o
~ 120
0
10
5
N/m
.:
ilte
rnal
dia
mete
r of c
yluld
er = 2
5
e
m
(
I m
arks)
c
. 11te
pl l
llt of
o
c l l ~ J
i c n l c
o
ru
prury
h
as
initi
al wo1
li
o
f
Rli S
l:
lkbs,
and au
l' lrim
aled
s a l V
val
ue
o f
R.B . 2 lu
khl
itt
a
s-ervice
l
if
e o
f8
y
enrr
.
(i )
G ive
n
8 o
bel
wee
11 the
s
irnig
ht-lln
e an
d de
clinin
g-ba
lance
u
tetho
ds o
f de
prec
iation
. \Vl
uclt
me
thod
woul
d
you
recom
men
d to
•
-ave
tall
w
1d
w
hy
?
(3
marl:
s)
(
ti) '&
ttm at
e U1e
l>oo
k valu
e of
he pl
ant
at
he
e
nd
.
of
I
yenn
f<'r
ea
ch.
o
f U
te
two
me
thodP. of
dopr
oclnti
cn
.
(3
rnark
s)