HPSC Polytechnic Lecturer 2022: Lecturer (Technical Education) Screening Test, Chemical Engineering (Advt. No. 11/2021)
Text of page 1
DO NOT OPEN THE SEAL UNTIL INSTRUCTED TO DO SO
Question Booklet No.
QUESTION BOOKLET
CHEMICAL ENGINEERING
Booklet Series
A
Roll No.
(Enter your Roll number in the above space)
Time Allowed : 2 Hours Maximum Marks : 100
INSTRUCTIONS FOR CANDIDATES
1. IMMEDIATELY AFTER THE COMMENCEMENT OF THE EXAMINATION, YOU SHOULD CHECK THAT
THIS QUESTION BOOKLET DOES NOT HAVE ANY UNPRINTED OR TORN OR MISSING PAGES OR
QUESTIONS ETC. IF SO, GET IT REPLACED BY A COMPLETE QUESTION BOOKLET.
2. Please note that it is the candidate’s responsibility to encode and fill in the Roll Number and
Question Booklet Series Code A, B, C or D carefully and without any omission or discrepancy at
the appropriate places in the OMR Answer Sheet. Any omission/discrepancy will render the
OMR Answer Sheet liable for rejection.
3. This Question Booklet contains 100 questions. Each question is printed in English only. Each
question comprises four responses (answers). You will select the response which you want to
mark on the OMR Answer Sheet. In case you feel that there is more than one correct response,
mark the response which you consider the best. In any case, choose ONLY ONE response for
each question.
4. You have to mark all your responses ONLY on the separate OMR Answer Sheet provided. See
Instructions at the backside of the OMR Answer Sheet.
5. All questions carry equal marks.
6. Before you proceed to mark in the OMR Answer Sheet the response to various questions in the
Question Booklet, you have to fill in some particulars in the OMR Answer Sheet as per
instructions mentioned on the OMR Answer Sheet.
7. After you have completed filling in all your responses on the OMR Answer Sheet and the
examination has concluded, you should hand over to the Invigilator only the OMR Answer
Sheet. You are permitted to take away with you the Question Booklet, along with candidate’s
copy of OMR Answer Sheet.
8. Sheets for rough work are appended in the Question Booklet at the end.
9. Penalty for wrong answers :
THERE WILL BE PENALTY FOR WRONG ANSWERS MARKED BY A CANDIDATE AS UNDER.
(i) There are four alternatives for the answer to every question. For each question for which
a wrong answer has been given by the candidate, 0.25 mark assigned to that question will
be deducted as penalty.
(ii) If a candidate gives more than one answer, it will be treated as a wrong answer even if one
of the given answers happens to be correct and there will be same penalty as above to that
question.
(iii) If a question is left blank, i.e., no answer is given by the candidate, there will be no penalty
for that question.
DO NOT OPEN THE SEAL UNTIL INSTRUCTED TO DO SO
Chemical Engineering /6- A
Text of page 2
1. _____ equation predicts the activity 6. The specific cake resistance for
coefficient from experimental data. compressible sludges is a function
[A] Lewis-Randall of the pressure drop
[B] Margules [A] over cake
[C] Van Saar [B] over medium
[D] Uniquas [C] overall
2. Cp of a gas at its critical [D] over filter medium
temperature becomes
[A] zero 7. Trommels operate at
[B] unity [A] high speed
[C] infinity [B] low speed
[D] 7R/2 (where R = Universal gas [C] intermediate speed
constant)
[D] very high speed
3. Mollier Diagram is a plot of
[A] temperature vs enthalpy 8. Rate determining step in a
reaction consisting of a number of
[B] temperature vs entropy
steps in series is the
[C] enthalpy vs entropy
[A] fastest step
[D] temperature vs internal energy
[B] slowest step
4. Bernoulli’s equation is a [C] intermediate step
mathematical expression of
[D] step with highest rate
[A] the ratio of kinetic to viscous
forces in a flow stream
9. If G (free energy change) for a
[B] friction loss as fluid moves chemical reaction is very large and
through a rough pipe negative, then the reaction is
[C] potential and kinetic energies [A] not feasible
in a flow stream
[B] just feasible
[D] fluid density and
compressibility in a restriction [C] very much feasible
[D] G is no measure of feasibility
5. In which of the following cases, it
of a reaction
is possible for flow to occur from
low pressure to high pressure?
10. Condensation of a vapour under
[A] Flow of liquid in a diverging saturation condition means
pipe removal of
[B] Flow of liquid in a converging [A] latent heat
pipe
[B] sensible heat
[C] Flow of air downward in a pipe
[C] super heat
[D] In a constant cross-section
conduit [D] None of the above
Chemical Engineering/6- A 2
Text of page 3
11. Heat transfer rate is maximum in 16. A first-order instrument is
[A] laminar flow [A] two tanks connected in
interacting mode
[B] turbulent flow
[B] vapour pressure thermometer
[C] cocurrent flow (base type)
[C] two tanks connected in non-
[D] countercurrent flow
interacting mode
[D] U-tube manometer
12. Absorption coefficient is maximum
for
17. Ammonia separation process is
[A] aluminium plate performed by
[B] steel [A] absorption process
[B] distillation process
[C] furnace refractories
[C] diffusion process
[D] carbon lamp black
[D] humidification process
13. The diffusivity has same 18. Alcohol is dehydrated using _____
dimension as distillation.
[A] absolute viscosity [A] extractive
[B] kinematic viscosity [B] steam
[C] azeotropic
[C] density
[D] molecular
[D] concentration
19. Mass transfer coefficient of liquid
14. Which one of the following is not a is
diffusional process? [A] affected more by temperature
[A] Mass transfer than that for gases
[B] affected much less by
[B] Heat transfer temperature than that for gases
[C] Momentum transfer [C] not affected by temperature
[D] Molecular diffusion [D] None of the above
20. The percentage humidity is less
15. Most expensive controller is
than the relative humidity only at
[A] P controller _____% humidity.
[B] PI controller [A] 0
[B] 100
[C] PID controller
[C] 0 & 100
[D] PD controller
[D] <0
Chemical Engineering /6- A 3 [ P.T.O.
Text of page 4
21. Nitrous oxide reacts with oxygen to 25. Calculate the difference between
form nitrogen dioxide in a the molar internal energy and the
reversible reaction given below : molar enthalpy for a perfect gas at
NO(g) + O2(g) 2NO2(g), given that 298·15 K.
rG ° = –81·2 kJ mol–1. [A] 35·859 J mol–1
The equilibrium constant at 25 °C [B] 0 J mol–1
for the reaction is
[A] 5·91 × 10–13 [C] 2·4790 J mol–1
[B] 28·2 [D] 8·3145 J mol–1
[C] 1·03
[D] 1014 26. A metallic block weighs 5 kg and
22. The specific heat capacity of has an initial temperature of 500 °C.
air at constant pressure is The block is dropped in a tank
Cp = 26·693 J/mol-K and T is in containing 40 kg of water at 25 °C
kelvin. The heat given off by and left till the equilibrium is
1 mol of air, when cooled at achieved. Specific heat of block
1 atmospheric pressure from material is 0·4 kJ-kg–1-K–1. The total
500 °C to –100 °C, is entropy change in kJ-kg–1-K–1 is
[A] 10·73 kJ [A] –1·87
[B] 16·89 kJ
[B] 0
[C] 16·01 kJ
[D] 18·33 kJ [C] 1·26
23. For a spontaneous change in a [D] 3·91
system at constant temperature
and pressure, which of the following 27. The dimensionless group in mass
statements is true? transfer that is equivalent to
[A] G < 0 Prandtl number in heat transfer is
[B] G = 0 [A] Nusselt number
[C] G > 0 [B] Sherwood number
[D] There is no restriction on the
value of G [C] Schmidt number
24. In a throttling process, the [D] Stanton number
pressure of an ideal gas reduces by
50%. If Cp and Cv are the heat 28. The pressure drop across an orifice
capacities at constant pressure meter is overestimated by 5%.
and constant volume respectively What will be the percentage error
( = Cp/Cv), the specific volume will while measuring the flow rate?
change by a factor of [A] +2·47
[A] 2
[B] 5
[B] 21/
[C] –2·47
[C] 2 –1/
[D] 0·5 [D] –5
Chemical Engineering/6- A 4
Text of page 5
29. Size reduction of coarse hard 33. During the transient convective
solids using a crusher is cooling of a solid object, the Biot
accomplished by number approaches 0. This
indicates
[A] attrition
[A] uniform temperature
[B] compression throughout the object
[C] cutting [B] negligible convection at the
surface of the object
[D] impact
[C] significant thermal resistance
30. Lower BWG means _____ of the within the object
tube. [D] significant temperature
gradient within the object
[A] lower thickness
[B] lower cross-section area 34. For flow of fluid over a heated
plate, the following fluid properties
[C] outer diameter
are known :
[D] inner diameter
Viscosity = 0·001 Pa-s; Specific heat
at constant pressure = 1 kJ/kg-K;
31. Dilute slurry is filtered at constant Thermal conductivity = 1 W/m-K.
pressure to recover the solids. To
The hydrodynamic boundary layer
reduce the time of filtration, the
thickness at a specified location on
dilute slurry is initially evaporated
the plate is 1 mm. The thermal
to remove one-fourth of the
boundary layer thickness at the
solvent. If the resistance of the
same location is
filter medium is neglected,
filtration time will be reduced by a [A] 0·001 mm
factor of [B] 0·01 mm
[A] 32 [C] 1 mm
[B] 16 [D] 1000 mm
[C] 8
35. A hollow sphere of internal diameter
[D] 4 ID = 20 cm and outer diameter
OD = 30 cm contains hot fluid. What
32. Water flows through a circular pipe should be the critical radius of
having diameter 5 cm with a insulation for maximum rate of heat
pressure of 2 bars and velocity of transfer? (Thermal conductivity
2 m/s. The kinetic head of water is k = 0·86 W/m-K and convection heat
equal to transfer coefficient of the outer fluid
ho = 20 W/m2-K)
[A] 20·4 m
[A] 0·086 cm
[B] 0·101 m
[B] 0·86 m
[C] 0·204 m [C] 8·6 mm
[D] 10·1 m [D] 8·6 cm
Chemical Engineering /6- A 5 [ P.T.O.
Text of page 6
36. A composite flat wall of a furnace 39. If the distillation is operating at
is made up of two materials A and total reflux, the distillation column
B. The thermal conductivity of A is requires minimum
twice that of B, while the thickness
[A] reboiler load
of layer of A is half that of B. If the
temperatures at the two sides of [B] condenser load
the wall are 400 K and 1200 K, [C] number of plates
then the temperature drop (in K)
across the layer of material A is [D] diameter of column
[A] 125 40. The flooding velocity in a plate
column operating at 1 atm
[B] 133
pressure is 3 m/s. If the column is
[C] 150 operated at 2 atm pressure under
otherwise identical conditions, the
[D] 160
flooding velocity will be
[A] 3/2
37. The formula for thermal
resistance (Rk) of a spherical shell [B] 3/2
of inner and outer radii as ri and ro [C] 1
respectively (where k is the
thermal conductivity), is [D] 3/4
[A] Rk = (ri – ro)/4 ri ro k 41. If the relative humidity is 90% and
temperature is 25 °C, the water
[B] Rk = 4 ri ro k / (ri – ro)
evaporates from the surface of a
[C] Rk = (r i – ro)/4 k water body at a rate of 1·0 kg/m2-h.
The RH that will lead to an
[D] Rk = r i ro /4 k (ri – ro)
evaporation rate of 3·0 kg/m2-h,
with other conditions remaining
38. A hot liquid is to be cooled in a 1-1 same, is
shell and tube heat exchanger
[A] 30%
from 80 °C to 50 °C. Cooling water
enters the tube side at 30 °C and [B] 50%
exits at 45 ºC. The properties of the [C] 60%
liquids are constant. Also, the
overall heat transfer coefficient is [D] 70%
same for counter-current and co-
current modes. The percentage 42. Stanton number for mass transfer
saving in heat transfer area for is defined as
counter-current option with [A] Schmidt number / (Sherwood
respect to the area of co-current Number × Re)
option is
[B] Re / (Schmidt Number ×
[A] 22·12 Sherwood Number)
[B] 36·32 [C] (Re × Sherwood Number) /
Schmidt Number
[C] 27·10
[D] Sherwood Number / (Re ×
[D] 44·50 Schmidt Number)
Chemical Engineering/6- A 6
Text of page 7
43. Consider the reaction 46. For a chemical reaction, the ratio of
k1(1st order) k2 (1st order) rate constant at 500 K to that at 400 K
A R
S
is 2·5. Given R = 8·314 J-mol–1-K–1,
R is the desired product. Step (1) the value of activation energy (in
kJ/mol) is
has activation energy of
20 kcal/mol and Step (2) has
[A] 10·5
activation energy of 10 kcal/mol.
In order to promote the production
[B] 12·0
of R, the reaction should be
conducted [C] 15·2
[A] at the lowest possible
temperature [D] 18·4
[B] at the highest possible
temperature 47. Gas chromatography is used for
[C] at an intermediate temperature the measurement of
(between the highest and the
[A] temperature
lowest temperature)
[D] in accordance with a [B] pressure
temperature progression; low
temperature followed by high [C] concentration
temperature
[D] flow rate
44. A plot of ln k vs 1/T, where k is the
rate constant is known as
[A] Bode diagram 48. The working principle of a Pirani
gauge is based on
[B] van’t Hoff plot
[C] Arrhenius plot [A] change in thermal
conductivity
[D] heat flow diagram
45. The vapour pressures of toluene are [B] change in ionization potential
6·811 kPa at 310 K and 24·15 kPa
at 340 K. Assuming that the [C] deformation of elastic body
variation of the vapour pressure P
[D] change in inductance
with temperature T may be
described by the expression
B 49. The flapper nozzle is the primary
log(P ) = A – device for all _____ instruments.
T
where P is in kPa. What are the
[A] electronic
values of A and B ?
[A] A = 7·059, B = 1930 K [B] hydraulic
[B] A = 5·307, B = 1930 K
[C] pneumatic
[C] A = 6·971, B = 7780 K
[D] electrical
[D] A = 5·307, B = 7780 K
Chemical Engineering /6- A 7 [ P.T.O.
Text of page 8
50. A system demonstrates inverse 53. The major component of Chemical
response for a unit step change in Engineering Plant Cost Index is
the input. Which one of the
following is true for such a system? [A] fabricated equipment and
machinery
[A] The transfer function of the
system has at least one [B] process instruments and
negative pole control
[B] The transfer function of the
[C] pumps and compressor
system has at least one
positive pole [D] electrical equipment and
[C] The transfer function of the material
system has at least one
negative zero
54. In case of a multiple effect
[D] The transfer function of the evaporator, the optimum number of
system has at least one effects is decided using
positive zero
[A] cost-benefit analysis
51. In a chemical process plant,
[B] floor area availability
utilities include steam, water,
compressed air, electricity, oxygen, [C] terminal parameters
fuel gases etc. The cost of utilities
in a common chemical process [D] evaporation capacity required
plant is roughly what percentage of
the total product cost?
55. Which of the following methods is
[A] 1 to 5 commonly used to commercially
[B] 10 to 20 produce ethylene from naphtha?
[C] 25 to 35 [A] Catalytic cracking
[D] 35 to 40
[B] Catalytic dehydrogenation
52. A company issues bonds worth [C] Pyrolysis
INR 5,00,000 having a coupon rate
of 10% and maturing in 10 years. [D] Hydrocracking
The company has set up sinking
fund method to pay off the bonds.
The coupons are to be paid 56. Which of the following is
biannually at an interest rate of undesirable in gasoline but
6%. The periodic payment of desirable in kerosene?
coupon will be in INR
[A] Aromatics
[A] 40,096·25
[B] Mercaptans
[B] 18,607·85
[C] 15,000·00 [C] Naphthenic acid
[D] 17,980·00 [D] Paraffins
Chemical Engineering/6- A 8
Text of page 9
57. The material used to give blue 61. The dynamic viscosity of water at
coloration to glass is room temperature will be close to
unity in which of the following
[A] NiO units?
[B] CoO
[A] Poise
[C] FeSO 4
[B] Centistoke
[D] CdS
[C] Milli N-s/m2
58. Antioxidants are added to rubber [D] Pa-s
to protect it from the attack of
light, heat and atmospheric ozone.
62. Purging is necessary in the
Which of the following is an
production of ammonia because
antioxidant used in rubber?
[A] Carbon [A] nitrogen is in excess
[B] Alkylated diphenylamine [B] argon gets accumulated
[C] Thiokol [C] reactants are not in
stoichiometric proportions
[D] Magnesium
[D] conversion is not 100%
59. Butyl rubber is a copolymer of
63. The coefficient of performance
[A] 1-butene with a small amount (COP) of a Carnot heat pump
of isobutene operating between T1 and T2 (such
[B] isobutene with a small that T1 > T2) is given by
amount of 2-methyl butadiene
[A] T2/(T1–T2)
(isoprene)
[B] T1/T2
[C] butadiene with a small
amount of propylene [C] T1/(T1–T2)
[D] 1-butene with a small amount
[D] T2/T1
of butadiene
64. For the fully developed laminar
60. Wood and cotton are mostly made
flow through the parallel plates,
up of
the ratio of maximum velocity to
[A] glucose monomers linked up in that of average velocity is
a polymer
[A] 2
[B] polyisoprene
[B] 2
[C] polysaccharides called cellulose
[C] 4/3
[D] amino acids in the form of
polypeptides [D] 3/2
Chemical Engineering /6- A 9 [ P.T.O.
Text of page 10
65. For the flow measurement of a 69. A cross-flow type air heater has an
canal, which device is used? area of 50 cm2. The overall heat
transfer coefficient is 100 W/m2-K
[A] Rectangular weir
and heat capacity of both hot and
[B] Venturimeter cold steam is 1000 W/m-K. The
value of NTU is
[C] Pitot tube
[D] Rotameter [A] 0·2
[B] 6·0
66. A centrifugal pump having an
impeller of diameter 120 mm, [C] 1000
delivers a power of 12 HP. If the
diameter of impeller is halved, [D] 5·0
what is the power, if other
parameters are kept constant? 70. A heat exchanger shell of outside
[A] 6 HP radius 15 cm is to be insulated
with glass wool of thermal
[B] 2 HP conductivity 0·0825 W/m degree
[C] 4 HP Celsius. The temperature at the
surface is 280 degree Celsius and
[D] 3 HP it can be assumed to remain
constant after the layer of
67. The apparent viscosity of a fluid is insulation has been applied to the
0·3
dV shell. The convective film
dV
given by 0·007 , where coefficient between the outside
dY dY
surface of glass wool and the
is the velocity gradient. The fluid
surrounding air is estimated to be
is
8 W/m2 degree Celsius. What is
[A] Bingham plastic the value of a critical radius?
[B] dilatant [A] 9·31 mm
[C] pseudoplastic
[B] 10·31 mm
[D] thixotropic
[C] 11·31 mm
68. Where the density difference of [D] 12·31 mm
the two liquid phases to be
separated is very small (as in milk
cream separator), the most 71. Controlling heat transfer film
suitable separator is a coefficient is the one which offers
_____ resistance to heat transfer.
[A] tubular-bowl centrifuge
[A] no
[B] disc-bowl centrifuge
[C] suspended batch basket [B] the least
centrifuge
[C] the largest
[D] perforated horizontal basket
continuous centrifuge [D] lower
Chemical Engineering/6- A 10
Text of page 11
72. The advantage of backward-feed 76. For the nth tray (counted from the
multiple effect evaporators over top of distillation column), the
forward-feed evaporators is that Murphree tray efficiency is given by
[A] heat sensitive materials can Yn 1 – Yn
be handled [A] Y – Y
n n –1
[B] there is no additional cost of Yn – Yn 1
pumping [B] Y – Y
n n 1
[C] most concentrated liquor is at Yn –1 – Yn
highest temperature [C] Y – Y
n 1 n –1
[D] equal heat transfer
coefficients exist in various Yn – Yn –1
[D]
effects Yn – Yn 1
73. In pool-boiling, the highest heat 77. Liquid redistributors are
transfer coefficient occurs in necessary in packed towers to
[A] subcooled boiling zone avoid
[B] nucleate boiling zone [A] flooding
[C] partial film boiling zone [B] weeping
[D] film boiling zone [C] channelling
[D] coning
74. Find the time taken to dry 50% to
40% of moisture (dry basis) if
critical moisture content is 30%. 78. For gas phase controlled mass
(If the weight of the wet solid is transfer, which one is not true?
5 kg and the product of area and [A] The gas is readily soluble in
the constant rate is 0·5 kg/min) liquid
[A] 20 sec [B] The gas is sparingly soluble in
[B] 40 sec liquid
[C] 60 sec [C] The equilibrium curve is flat
[D] 80 sec [D] Overall resistance to mass
transfer is equal to the
75. For a saturated liquid-vapour resistance on gas side
mixture, if the liquid flow rates
inside the enriching and the 79. If the operating line coincides with
stripping section of a fractionator the equilibrium curve, which one
are 30 mol/hr and 20 mol/hr of the following is not true for
respectively and also the feed rate absorbers?
is 10 mol/hr, find the feed condition.
[A] The solvent rate is minimum
[A] Saturated vapour
[B] The number of plates is
[B] Saturated liquid infinity
[C] Superheated vapour [C] The L/G ratio is maximum
[D] 50% vapour [D] The driving force becomes zero
Chemical Engineering /6- A 11 [ P.T.O.
Text of page 12
80. Consider a reversible reaction in a 81. For which reaction order, the half-
plug flow reactor. The maximum life of the reactant is half of the
and minimum permissible full lifetime (time for 100%
temperatures are Tmax and Tmin conversion) of the reactant?
respectively. Which of the [A] Zero order
following temperature (T ) profiles
[B] Half order
will require the shortest residence
time to achieve the desired [C] First order
conversion? [D] Second order
82. If Thiele modulus is _____, then
the pore diffusion resistance in a
catalyst may be considered as
[A] negligible.
[A] > 0·5
[B]
[C] < 0·5
[D] 0
83. For the irreversible reactions
k1 k2
[B] A R and A S , the rate
of disappearance of A is given by
[A] k1 – k 2 C A
[B] k1 k 2 C A
[C] 0·5 k1 k 2 C A
[D] k1C A
[C] 84. The conversion of a first order
liquid-phase A B in an ideal
continuous stirred tank reactor
(CSTR) is 50%. If another ideal
continuous stirred tank reactor
(CSTR) of the same volume is
connected in series, then %
conversion at the exit of second
reactor will be
[D] [A] 60
[B] 75
[C] 90
[D] 100
Chemical Engineering/6- A 12
Text of page 13
85. The open-loop transfer function of 89. A first order system with unity
a unity-gain feedback control gain and time constant is
system is given by subjected to a sinusoidal input of
frequency 1/. The amplitude
K
G (s ) ratio for this system is
(s 1)(s 2)
[A] 1
The gain margin of the system in
1
dB is [B]
2
[A] 0 [C] 1/2
[B] 1 1
[D]
[C] 2 4
[D] 90. The circumferential (hoop) stress
in a thin walled cylindrical vessel
under internal pressure is
86. Which one of the following sensors
is used for the measurement of pd
[A]
temperature in a combustion 2t
process (T > 800 °C)? pd
[B]
t
[A] Type J thermocouple
pd
[B] Thermistor [C]
3t
[C] Resistance temperature detector pd
[D]
4t
[D] Pyrometer
91. The term ‘knuckle radius’ is
associated with
87. Which of the following is a static
characteristic of instrument? [A] flat heads
[A] Fidelity [B] torispherical heads
[B] Dynamic error [C] hemispherical heads
[C] Reproducibility [D] conical heads
[D] Speed of Response 92. For a given fluid, as the pipe
diameter increases, the pumping
cost
88. An example of an open-loop second
order underdamped system is [A] decreases
[A] liquid level in tank [B] increases
[B] U-tube manometer [C] remains the same
[D] may increase or decrease,
[C] thermocouple in a thermo-well
depending upon whether the
[D] two non-interacting first order fluid is Newtonian or non-
systems in series Newtonian
Chemical Engineering /6- A 13 [ P.T.O.
Text of page 14
93. A five-year asset which had an 97. Styrene is produced from ethyl-
initial cost of ` 2,00,000 with a benzene by
salvage value of ` 20,000, was
[A] dehydrogenation
depreciated by the straight line
method. The book value of asset at [B] alkylation
the end of four years will be
[C] oxidation
[A] ` 36,000
[D] dehydration
[B] ` 42,000
[C] ` 48,000 98. In the Fluid Catalytic Cracker
(FCC), the cracking reaction is
[D] ` 56,000 _____ and the regeneration
reaction is _____ respectively.
94. Direct cost component of the fixed [A] exothermic, endothermic
capital consists of
[B] endothermic, endothermic
[A] contingencies
[C] exothermic, exothermic
[B] onsite and offsite costs
[D] endothermic, exothermic
[C] labour costs
99. The final boiling points of gasoline,
[D] raw material costs
diesel, atmospheric gas oil (AGO)
and lubricating oils vary as
95. With increase in the discounted
[A] gasoline > diesel > AGO >
cash flow rate of return, the ratio
lubricating oils
of the total present value to the
initial investment of a given [B] lubricating oils > AGO >
project diesel > gasoline
[A] decreases [C] AGO > lubricating oils >
diesel > gasoline
[B] increases
[D] lubricating oils > diesel >
[C] increases linearly AGO > gasoline
[D] remains constant
100. Triple superphosphate is
manufactured by reacting
96. For the hydrogenation of oils, _____
is used as a catalyst and _____ is a [A] phosphate rock with
catalyst poison. phosphoric acid
[A] platinum, sulphur [B] phosphate rock with sulphuric
acid
[B] platinum, oxygen
[C] phosphate rock with nitric acid
[C] nickel, sulphur
[D] ammonium phosphate with
[D] nickel, oxygen phosphoric acid
Chemical Engineering/6- A 14
Text of page 15
SPACE FOR ROUGH WORK Chemical Engineering /6- A 15 [ P.T.O.
Text of page 16
SPACE FOR ROUGH WORK
Chemical Engineering/6- A 16 LLL22/6—54×4
Text of page 1
Final Answer Key - Chemical Enggineering
Held on 11.06.2022
Series 'A'
Q.No. Ans Q.No. Ans Q.No. Ans Q.No. Ans
1 B 26 C 51 B 76 B
2 C 27 C 52 B 77 C
3 C 28 A 53 A 78 B
4 C 29 B 54 A 79 C
5 A 30 B 55 C 80 B
6 A 31 B 56 A 81 A
7 B 32 C 57 B 82 C
8 B 33 A 58 B 83 B
9 C 34 C 59 B 84 B
10 A 35 D 60 C 85 D
11 B 36 D 61 C 86 D
12 D 37 A 62 B 87 C
13 B 38 C 63 C 88 B
14 D 39 C 64 D 89 C
15 C 40 A 65 A 90 A
16 B 41 D 66 D 91 B
17 A 42 D 67 B 92 A
18 C 43 B 68 B 93 D
19 A 44 C 69 D 94 B
20 B 45 A 70 B 95 A
21 D 46 C 71 C 96 C
22 C 47 C 72 C 97 A
23 A 48 A 73 B 98 D
24 A 49 C 74 C 99 B
25 C 50 D 75 B 100 A
Text of page 2
Final Answer Key - Chemical Enggineering
Held on 11.06.2022
Series 'B'
Q No. Ans Q No. Ans Q No. Ans Q No. Ans
1 B 26 A 51 B 76 C
2 A 27 A 52 B 77 A
3 C 28 B 53 C 78 B
4 B 29 B 54 A 79 B
5 B 30 C 55 C 80 B
6 D 31 A 56 D 81 C
7 D 32 B 57 D 82 C
8 C 33 D 58 A 83 B
9 B 34 B 59 C 84 C
10 C 35 D 60 C 85 D
11 A 36 C 61 A 86 A
12 B 37 B 62 D 87 D
13 A 38 A 63 D 88 B
14 D 39 C 64 B 89 B
15 B 40 A 65 C 90 D
16 A 41 B 66 A 91 B
17 C 42 D 67 C 92 C
18 A 43 C 68 C 93 C
19 D 44 A 69 A 94 B
20 B 45 A 70 C 95 C
21 A 46 C 71 D 96 B
22 B 47 C 72 B 97 B
23 C 48 C 73 B 98 C
24 C 49 A 74 A 99 B
25 C 50 B 75 A 100 C
Text of page 3
Final Answer Key - Chemical Enggineering
Held on 11.06.2022
Series 'C'
Q No. Ans Q No. Ans Q No. Ans Q No. Ans
1 B 26 C 51 B 76 C
2 B 27 B 52 B 77 A
3 B 28 B 53 C 78 C
4 C 29 D 54 A 79 D
5 C 30 D 55 B 80 D
6 B 31 C 56 D 81 A
7 C 32 B 57 B 82 C
8 D 33 C 58 D 83 C
9 A 34 A 59 C 84 A
10 D 35 B 60 B 85 D
11 B 36 A 61 A 86 D
12 B 37 D 62 C 87 B
13 D 38 B 63 A 88 C
14 B 39 A 64 B 89 A
15 C 40 C 65 D 90 C
16 C 41 A 66 C 91 C
17 B 42 D 67 A 92 A
18 C 43 B 68 A 93 C
19 B 44 A 69 C 94 D
20 B 45 B 70 C 95 B
21 C 46 C 71 C 96 B
22 B 47 C 72 A 97 A
23 C 48 C 73 B 98 A
24 B 49 A 74 B 99 C
25 A 50 A 75 B 100 A
Text of page 4
Final Answer Key - Chemical Enggineering
Held on 11.06.2022
Series 'D'
Q No. Ans Q No. Ans Q No. Ans Q No. Ans
1 B 26 A 51 C 76 C
2 B 27 C 52 B 77 A
3 B 28 A 53 A 78 A
4 C 29 B 54 C 79 B
5 A 30 B 55 B 80 B
6 C 31 B 56 B 81 C
7 D 32 C 57 D 82 A
8 D 33 C 58 D 83 B
9 A 34 B 59 C 84 D
10 C 35 C 60 B 85 B
11 C 36 D 61 C 86 D
12 A 37 A 62 A 87 C
13 D 38 D 63 B 88 B
14 D 39 B 64 A 89 A
15 B 40 B 65 D 90 C
16 C 41 D 66 B 91 A
17 A 42 B 67 A 92 B
18 C 43 C 68 C 93 D
19 C 44 C 69 A 94 C
20 A 45 B 70 D 95 A
21 C 46 C 71 B 96 A
22 D 47 B 72 A 97 C
23 B 48 B 73 B 98 C
24 B 49 C 74 C 99 C
25 A 50 B 75 C 100 APage 1 of 16
Source: Haryana Public Service Commission. Question paper published by Haryana Public Service Commission.