Karnataka PGCET 2015 Question Paper Chemical Engineering

POST GRADUATE COMMON ENTRANCE TEST - .201:5;T
DATE & TIME COURSE SUBJECT
08-08-2015 ME / M.Tech/ M.Arch / Courses CHEMICAL
10.30 AM TO 12.30 PM Offered by VTU / UVCE / JBDTCE ENGINEERING

MAXIMUM MARKS TOTAL DURATION MAXIMUM TIME FOR ANSWERING
100 150 MINUTES 120 MINUTES

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SERIAL NUMBER 3111017
VERSION CODE A -1
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MARKS DISTRIBUTION
PART - 1 50 QUESTIONS CARRY ONE MARK EACH (1 TO 50)
PART - 2 25 QUESTIONS CARRY TWO MARKS EACH (51 - 75)

Cieflit

CHEMICAL ENGINEERING
PART - 1
(50 X 1 = 50)
(Each question carry one mark)

1. How many g moles are equivalent to 1.0kg 5. The volume of 25kg of Chlorine at standard
of Hydrogen ? conditions is

a. 250 g mole h 500 g mole a. 6.9 m2 b. 7.9 m2
c. 750 g mole d 900 g mole c. 8.9 m2 d 9.9 m2

6. A perfect gas
2. The temperature measured by a bare
thermometer or thermocouple is called a. is incompressible
h has zero viscosity
a. Dry bulb temperature
c. cannot develop shear stress
h Wet bulb temperature
satisfies PV = nRT
c. Absolute humidity
d. Relative humidity 7. An incompressible flow is one in which
a. fluid is frictionless
3. The standard Heat of Reaction for the b. fluid compressibility is greater than zero
reaction aA+bB -->cC+dp is given by, c. density does not change due to pressure
and temperature
a. A H'; = [C A H,°..,+ d A 11;
1 d1 - [ aA b A 11',.).8 ] d temperature of fluid remains constant

b. A = [aA cA + [b A if:!„ + d A H,%]
8. An example of Newtonian Fluid is
c. A 1-1" = [b A 1-1:!.,+ c A H,?]+ [a A + dA a. Non-colloidal solution
b. Sewage sludge
d. /-1'; = [a A 11:!, + a A H(,),] - [CA 14:"„ + b A 1-11;,]
c. Rubber latex
d Quick sand
4. The temperature to which a substance must
be heated before it may burn is called
9. The device which may be used for measuring
a. Flash Point small differences in pressures is
b. Critical Temperature a. U-tube Manometer
c. Transition Temperature b. Inclined Manometer
d. Ignition Temperature c. Mercury Barometer
d. Hydrometer

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10. Which of the following does not fall in the 15. A propeller is an
category of Variable-Head meters ?
a. axial flow, low speed impeller
a. Venturimeter b. Orifice meter
h radial flow, high speed impeller
c. Pitot tube d Rotameter c. axial flow, high speed impeller
d radial flow, low speed impeller
11. The crusher operates by
a. Impact h Compression 16. The First Law of Thermodynamics is based
on
c. Attrition d. Expansion
a. Law of conservation of mass
b. Law of conservation of energy
12. The centrifuging in a ball mill occurs at a
speed called as c. Law of equiparation of energy

a. Normal speed d. Law of conservation of momentum

h Critical speed
c. Operating speed 17. Which of the following is an Extensive
property ?
d High speed
a. Temperature b. Pressure
c. Density d. Volume
13. The vacuum filters are limited to a maximum
filtering pressure of
18. In reversible isothermal expansion of an
a. 1 atmosphere Ideal gas
b. 2 atmosphere
a. Au = Q b. Q=w
c. 4 atmosphere
C. Au = P AV d. Au=Q+PAV
d. 5 atmosphere

19. In which of the following reaction equilibria,
14. In constant filtration Kp and Ky will have the same value ?
a. A P is minimum at start and maximum a. N2 + 3H2 "c=‘ 2NH,
at the end of the filteration run

b. A P is constant throughout the run b. N2 + 02 ‘=" 2N0

c. A P is maximum at start and minimum c. 2S02 + 02 --
,=' 2S03
at the end

d. A P is zero d. 2C0 + 02 7=1' 2CO2

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20. For a real gas, the Fugacity Co-efficient is 23. Log mean heat transfer area for the two heat
always transfer areas Al and A2 is given by

a. equal to one
212
b. 1Less than one a. 4%)

c. greater than one
112
d less than zero
P (A
/A2)

21. An equation for the heat flow in the cube for
constant thermal diffusivity is
c. ( Ai A2) 41/4)
a2T 5 2T a2T
+—+—
ay 2
=0
az 2
axe

This equation is known as
A1 -A2

a. Newton equation
24. In a double pipe heat exchanger, the outer
h Laplace equation dia. of inner pipe is d1 and inner dia. of outer
pipe is d2. The equivalent dia of annulus for
c. Poisson equation pressure degree calculation is

d Fourier equation
a. (4 —d12 )/ d1 b. 4(4 -d12 )/d1

c. (d2 d. 4(d2 —c11 )
22 In forced convection, fluids move under the
influence of
25. As the distances between heat source and
a. change in fluid pressure produced by object receiving the heat increases, the rate
external work of heat transfer by radiation

b. buoyant forces arising from changes in a. remains constant
density b. increases
c. elastic forces c. decreases
d. increases linearly
d. surface tension forces

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26. Fick's first law of diffusion for the z- direction 30. Synthetic detergent powder is produced by
is drying deteregent slurry in a

ac, a. Spray dryer
az b. Cylinder dryer

n ac A c. Freeze dryer
b. A —1-,AB
az d. Open post evaporator
32c
c• A = DAB az2A
31. The rate constant of a reaction depends on

a. Temperature of the System
a2cA
d. .1A =
az 2 b. Time of Reaction

c. Extent of Reaction
27. The temperature at which a vapour-gas d. Initial concentration of Reactants
mixture becomes saturated when cooled at
constant total pressure out of contact with a
liquid is called
32. In an ideal plug flow reactor at steady state:
a. Bubble point
b. Dew point a. There may be diffusion along the flow
path
c. Wet-bulb temperature
b. There may be lateral mixing of fluid
d. Dry-bulb temperature
c. Composition of reactant remains
constant along flow path
28. In a distillation operation, total reflux
requires cL Fractional conversion of reactant varies
from point to point along a flow path
a. minimum no. of plates
b. minimum reboiler and condeser load
c. infinite no. of plates 33. For a chemical reaction A B C , the
d. flow of fresh feed must continue fractional conversion of reactant A is
proportional to time. The order of reaction
must be
29. The distribution coefficient for the system
water (A) - Chloroform (B) - Acetone (C) is a. 0 b. 1
a. 1
c. d. 2
c. <1

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34. Which of the following types of tracer input 38. Root-locus method for stability of control
signal can be used to study the extent of systems
Non-ideal flow ?
a. is a graphical procedure
a. Periodical signal
h difficult to apply to system containing
b. Step signal transportation by
c. Pulse signal c. provides roots of characterestic equation
d. All of the above d. All of the above

35. The action of a catalyst follows its ability to 39. Which of the controllers has smallest
change the maximum deviation ?
a. Heat of reaction a. P-controller
b. Heat of formation of product b. R-I controller
c. Activation energy c. P-D controller
d. Equilibrium constant d. P-I-D controller

36. The Laplace Transform of unit step change is
40. The transfer function of an ideal proportional
controller is
a. 1

a. K,
c. S

c. 1 + Kc
37. The response of a first-order system
[G(S) = 1/(TS+1)1 to a unit-step change in
input is given by
41. The biochemical treatment of sewage
effluents is essentially a process of

a. reduction

b. oxidation

e ir c. dehydration
c. v
T I +e
alkalinisation

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42. For protection of acquatic life in a fresh 47. Crude petroleum consists of
water stream, sewage effluent, dissolved
oxygen content should not be less than a. 84 -87 percent carbon and 11 - 14 percent
Hydrogen
a. 15 ppm b. 10 ppm
c. 5 ppm d. 20 ppm b. 11 -14 percent carbon and 84 - 87 percent
Hydrogen

c. 54 percent carbon and 25 percent
43. The most efficient equipment for removal of Hydrogen
sub micron dust particles from blast furnace
gas is d. 70 - 72 percent carbon and 5 - 7 percent
a. Venturi Scrubber Hydrogen

b. Gravity Settling Chamber
c. Electrostatic Precipitator 48. Which of the following products contain
11 Cyclone Seperator minimum sulphur ?

a. Naptha
44. Which of the following nitrogen oxides is
b. Kerosene
neutral in character
c. High speed Diesel oil
a. N 2 04 b. N205
d. Furnace oil
c. N 2 0 d N203

49. Formation of soap involves
45. Gas temperature is an important
consideration in the design of fabric filter a. Hydrolysis
because it affects
b. Esterification
a. gas velocity
b. gas density c. Hydrogenation

c. selection of fabric d. All of the above
id. all of the above

50. The products of saponification of a fat are
46. The best fertilizer for rice paddies is
a. Glycerol and salts of higher fatty acids
a. Urea
b. Ammonium sulphate b. Glycerol and higher aliphatic alcohols
c. Super phosphate c. Glycerol and organic acids
d. Calcium Ammonium nitrate
d. Ethylene Glycol and organic acids

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PART - 2
(Each question carries two marks)
(25 X 2 = 50)
51. Calculate the standard heat of reaction : 55. What will be the power required to crush 150
tonnes per hour of limestone if 80 percent of
CaC2
+ 2H20 Ca(OH)2 + C2H2
AH feed passes 50 mm screen and 80 percent of
4) product a 3.125 mm screen ?
Cal I mol -15000 -68317.4 -235800 541941
Work index of lime stone =12.74
a. - 29971.2 Cal / mol a. 155.4 kW h 200 kW
h - 39971.2 Cal / mol c. 256.4 kW d. 300 kW
c. - 49971.2 Cal / mol
56. A centrifugal pump with an efficiency of 65%
d. - 59971.2 Cal / mol
is driven by an electric motor having an
efficiency of 90%. The pump delivers water
52. Calculate the enthalpy of sublimation of at a rate of 4 kg/ s against a total head of 25m.
Iodine from the following reaction and data: What is the power delivered by the motor ?
(A) H2(g) + 12 (s) --> 2H1 (g) = 57.9 kJ a. 508 W h 1000 W
(B) H2(g) + 12 (s) 2HI (g) 011 = -9.2 kJ
c. 1509 W d. 1600 W
Desired reaction is 12 (S) --> I, (g)
57. Find the transfer function C/R for the block
a. 67.1 kJ b. 47.1 kJ diagram shown in the figure
c. 57.1 kJ d. 77.1 kJ

53. What is the volume of 25kg of Chlorine at
standard condition ?
a. 6.9 m3 b. 7.9 m3 Ga + GaGbGc Gc. + GaGbG,
a.
c. 8.5 m3 d 9.1 m3 1+ Gi,G, h 1+ GbGe

54. A plate 0.6 mm distant from a fixed plate, GaGbGC GaGbG„
moves at 0.24 m/s and requires a force per c.
unit area of 1N/ m2 to maintain this speed. 1+ GaGI,G, GbG,
The fluid viscosity of the substance between
the plates in N/ s m2 is 58. The number of poles in the open loop transfer
a. 1.5 x 10-3N/s m2
b. 2.5x 10-3N/s m2 function G (s) = ( + 6S2 +11S + 6) are
c. 3.5x 10-3N/s m2
a. 1 b. 2
d_ 4.5 x 10-3N/sm2
c. 3 d 0

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59. The characterestic equation for the control 63. What is the change in internal energy when
system with a closed loop transfer function 5g of air is heated from 0°C to 2°C ? The
specific heat at constant volume is 0.172
G1
cal/°C
1+G is
a. 0.172 cal h 1.72 cal
G1 _ 0 c. 17.2 cal d. 0
a. b. 1+G=0
1+G —

c. G=0 d. GI =l+G 64. In a reversible isothermal process an ideal
gas expands to four times its initial volume.
The change in entropy is
60. For continuous reverse air cleaning in a
fabric filter, gas-to-fabric ratio normally a. R 1og10 4 b. R log 4
varies from
a. 8 to 15 cfm / sq ft c. C„ 1og10 4 d. C,, log 4

b. 0.2 to 0.5 cfm / sq ft
c. 50 to 60 cfm / sq ft 65. The general formula of paraffins is
d. 0.01 to 0.1 cfm / sq ft a. Cn H2n b. Cn H2n.2

61. The lowest layer of atmosphere is called c. cH2.+2 d C.H2,1
a. Ionosphere
b. Troposphere
66. For petroleum products, °API is given by
c. Stratosphere
d_ Exosphere 131.5
a. °API= 141.5
s
62. A closed vessel contains equal number of 02
and H2 molecules at a total pressure of 141 5
760mm of Hg. If 02 can be removed from the b. °API — . 131.5
s
system, the pressure will be
a. 380 mm Hg 145
c. °API = 130
s
b. 1520 mm of Hg
c. Remain unchanged 131 5
d °API = 141.5 .
d Initial decrease but will soon reach s
original Value

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67. Producer gas is obtained by 72. Temperature of hot fluid changes from
80°C to 50°C which will heat another fluid
a. Thermal cracking of Naptha from 30°C to 60°C in a counter-current
b. Passing steam and air through red hot heat exchanger. What is logrithmic mean
coke temperature difference ?
c. Passing air through red hot coke a. 0 b. 20°C
d. Passing steam through red hot coke c. 1 cL Not defined

68. Which of the following is a polysaccharide ?
73. Minimum number of ideal stages in a
a. Starch b. Sucrose distillation column corresponds to reflux
c. Glucose d. Fructose ratio equal to

a. 0 b. 1
69. Nitrile rubber is a polymer of c. 2 d. Infinity
a. Acrylonitrile and styrene
Butadiene and styrene
74. A wet solid is to be dried from 80 to 10 °A)
c. Butadiene and acrylonitrile moisture on wet basis. The moisture to be
d. Isobutylene and isoprene evaporated per 1000 kg of dried product is

a. 630 kg b. 3888.89 kg
70. In the sulphate pulp process, the digestor c. 700 kg d. 3500 kg
conditions are

a. 120 - 130°C and 5 atm 75. The following parallel reaction is carried out
in a CSTR in which concentration of A
b. 120 - 130°C and 1 atm changes from 1 to 0.5 mol/lt. There is no R
and S present in the feed. What is the
c. 75 - 80°C and 15 atm concentration of R at the exit?

d 175 - 180°C and 10 atm A —> R, rR = 0.2C42 , mo/ / it min

71. Space time and holding time are equal to A —> S, r„ =0.4CA,mol Iltmin
each other for
a. Batch reactor 5 7
a. b. 13
b. Plug flow reactor 14
c. Mixed flow reactor
3 1
cL semi-batch reactor c. d.
8 3

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