CUSAT CAT 2019 Question Paper Chemical

CHEMICAL ENGINEERING

019
2
1. T
Bernoulli’s equation for steady frictionless, continuous fluid flow states that the
S
E
________ is same at all sections.
T
(A) total energy N
O
(B) total pressure
SI
(C)
IS
velocity head
M
M
(D) total mass
D
A

2. N
Most commonly used joint in the underground pipe lines is the
O
M flange
O
(A)
M
CO (C) sleeve joint
E
(B) coupling

SAT
C T
(D) expansion joint

CU 3.
AT N
Quicksand is an example of a _____ fluid

19
S IO
(A) Bingham plastic
(B) dilatant
2 0
(C) Newtonian
(D) Pseudo – plastic
ST
4.
C IS N
T E
In the venturi meter, the velocity ______ in the upstream cone.

O
M I
(A) decreases
S
IS
(B) remains constant

D
(C) increases
(D)
M
becomes zero

5. A N
A
D
_____ is defined as the ratio of the shear stress to the product of the velocity head and
density.
O
(A) Drag force M
(B) Drag coefficient M
(C) Friction factor
C O
(D) Coefficient of discharge

AT
S
CU

6. Number of gm moles of solute dissolved in one litre of a solution is called its

(A) equivalent weight 019
(B) molarity 2
(C) molality
S T
E
(D) normality
T
N
O
7. I
A bypass stream in a chemical process is useful because it
S
IS control of the process
(A) facilitates better
(B) improvesM
D the
M
the conversion
A
(C) increases product yield

N the product quality
(D) enriches
O
M
8.

SA
T
O
M
O E
A limiting reactant is the one which decides the ______ in the chemical reaction
C (A) equilibrium constant
C T
(B) reaction order

CU
T
(C) rate constant

N
(D) conversion

9. A
S IO 2 0 19
A gaseous mixture contains 14 kg of N2, 16 kg of O2 and 17 kg of NH3. The mole fraction

of oxygen is

ST
C IS E
(A) 0.16
(B) 0.66
T
(C) 0.25
N
(D) 0.47
O
M IS
S I
D
10. Kirchhoff’s equation relates heat of reaction with
M
(A) pressure
(B) volume
A
(C)
N
number of moles
(D)
O
temperature

M
11. M by mass. The actual quantity of urea sample is
Urea sample contains 42 grams nitrogen

COCH N O and molecular weight = 60 gm mol)
____. (molecular formula of urea is 4 2

(A) 90 grams
A T
(B) 80 grams
S
(C) 95 grams
(D) 60 grams
C U

12. The ratio of the actual mesh dimension of Taylor series to that of the next smaller screen
is
019
(A) 2 2
(B) √ 2
S T
E
(C) 1.5
(D) √ 3 T
N
O
SI
13.
I S
The work required in crushing is proportional to the new surface created. This is the
M crushing law.
M
statement of _____
D
(A) Kick’sA

N
(B) Rittinger’s
O
M
(C) Bond’s
M
O
(D) Hooke’s

SA
CO
C T E
T Solids may be broken using a hammer by ______ type of action
14.

CU (A)
(B)
(C) T
compression

A N
attrition
impact
19
S IO 0
(D) cutting
2
15.
U S ST
_____ is an example for filter aid used to increase filtration rate.

C IS
(A) α - amino acid T E
(B) lignin
N
O
M
(C) diatomaceous earth
(D) sucrose
S I
IS
16.
D M
The SI unit of filter medium resistance is

A
(A)
(B)
(C)
m-1
m2/gm
m/kg
O
N
A
D
(D) kg m-2
M
M
C O
AT
S
CU

17. During filtration, as time passes the pressure drop across the unit

(A) always decreases 019
(B) remains constant 2
(C) T
first increase and then decrease
S
E
(D) always increases
T
N
O
18. I
What is the critical speed in revolutions per second, for a ball mill of 1.2 m diameter
S
IS
charged with 70 mm diameter balls?
M
(A)
(B)
0.5
1.0 A
D
M
(C) N
2.76
(D) O
0.66
M

S
19.
AT
M

(A)
O E
COThe raw materials required for the manufacture of soda ash by Solvay process are
C T
brine, limestone and coal

CU
T
(B) ammonia, CO2 and slaked lime

A N
(C) ammonia, CO and calcium sulphate
(D) sulphur, oxygen and ammonia
19
S IO 2 0
20. Rancidity of fatty oil can be reduced by its

ST
C IS E
(A) decoloration
(B) hydrogenation
T
(C) oxidation
N
(D) hydrolysis
O
M IS
S I
D
21. Power consumption during turbulent flow in agitation tank is proportional to the _____ of
the liquid. M
(A)
(B)
(C)
A viscosity

O
density N
A
D
thermal conductivity

(D) surface tension
M
M
Thinner is added along with paint O
22.
C to

A T
(A) accelerate the oxidation of oil
Sand
(B) prevent gelling of paint

C U
(C) suspend pigments
(D) form a protective film
dissolve film forming materials

23. The ideal pulp for the manufacture of paper should have high ______ content.

(A) chlorophyll 019
(B) lignin 2
(C) iron
S T
E
(D) cellulose
T
N
O
24. Ziegler process
S I
(A) employs high ISpressure
(B) producesM
(C) usesA
M
D high density polyethylene
no catalyst

N low density polyethylene
(D) produces
O
M
25.

SA
T
O
M
O E
The raw materials required for the manufacture of Nylon – 66 are
C (A) hexamethylene diamine and adipic acid
C T
(B) caprolactum and epoxy resin

CU
T
(C) hexamethylene diamine and maleic anhydride

N
(D) dimethyl terephthalate and ethylene glycol

26. A
S IO 2 0 19
Alum is used as a coagulant in water treatment to remove

(A)
(B)
(C)
(D)
U
C IS S
color
turbidity
bacteria
All of the above T E ST
N
O
27.
M S I
Hydrazine (N2H4) is used mainly as an
IS
(A)
D explosive
M
(B) detergent additive
(C)
A
rocket fuel
(D)
N
antibiotic

O
28. M
Bakelite is a type of _________ resin
M
(A) polyacrylic
(B) phenol – formaldehyde C
O
(C) urea – formaldehyde T

SA
(D) polyester

CU

29. Heat flux is the time rate of heat transfer per unit

(A) length 019
(B) cross sectional area 2
(C) volume
S T
E
(D) thickness
T
N
O
30. I
_____ number is the ratio between the temperature gradient at the wall to the average
S
IS
temperature gradient across the entire pipe.
M
(A)
(B)
Grashof
FourierA
D
M
(C) N
Rayleigh’s
(D) O
Nusselt
M

S
31.
AT
M

(A)
O E
COGrashof number is the ratio between ______ and viscous force.
C T
thermal diffusivity

CU
T
(B) heat capacity

A N
(C) buoyancy force
(D) gravity force
19
S IO 2 0
32. ______ usually condense in the dropwise manner.

ST
C IS E
(A) steam
(B) glycerine
T
(C) nitrobenzene
N
(D) liquid metals
O
M IS
S I
D
33. For cross sections other than circular, equivalent diameter is defined as ____ times the
hydraulic radius. M
(A)
(B)
(C)
A two
ten
five
O
N
A
D
(D) four
M
M
Transmissivity of an opaque solid O
34.
C is

(A) unity
A T
(B) zero
S
(C) infinity
(D) negative
C U

35. Baffles are installed in the shell side of a heat exchanger to

(A) 019
promote cross flow and raise the average velocity of the shell side fluid
(B) minimize the cost of heat exchanger2
(C) increase the heat transfer area
S T
E
(D) avoid the scale formation
T
N
O
36. I
The diffusivity (D) in a binary gas mixture is related to the temperature (T) as
S
(A) DαT IS
M
D
M
(B) D α T1.5
(C) A
D α T0.5

(D) N
D α T2
O
M
37.

SA
T
O
M
O E
The enrichment of the vapour stream as it passes up through the distillation column in
C contact with reflux is called
(A) reforming
C T
CU
T
(B) by passing

A N
(C) rectification
(D) channeling
19
S IO 2 0
38. Azeotropic distillation is employed to separate

ST
C IS E
(A) heat sensitive materials
(B) high boiling mixture
T
(C)
N
mixture with very high relative volatility
(D)
O
constant boiling mixture

M IS
S I
D
39. Milk powder is manufactured using _____ dryer.
M
(A) spray
(B) freeze
A
(C) tray
N
(D) rotary
O
M
40. M
Radioactive nuclear waste is treated in

(A) mixer settler extractor C
O
(B) rotating disc contactorT

SA
(C) pulsed column extractor

CU
(D) Bollman extractor

41. Decaffeination of coffee is a practical example of _______ process

(A) adsorption 019
(B) desorption 2
(C) super critical fluid extraction
S T
E
(D) leaching
T
N
O
42. I
Wetted wall tower is used in the measurement of
S
IS
(A) thermal diffusivity
M
D
M
(B) mass diffusivity
A of liquid
(C) viscosity

N transfer coefficient
(D) mass
O
M
43.

SA
T
O
M
O E
The thermostat mechanism to control temperature in water heaters used in houses is
C ______ type controller.
C T
(A) proportional

CU
T
(B) proportional – derivative

A N
(C) pneumatic
(D) on-off
19
S IO 2 0
44. Wet bulb and dry bulb temperatures become identical at ____ percent saturation curve

ST
C IS E
(A) 50
(B) 75
T
(C) 25
N
(D) 100
O
M IS
S I
D
45. Sherwood number in mass transfer is analogous to the ______ number of heat transfer
M
(A) Grashof
(B) Biot
A
(C) Nusselt
N
(D) Froude
O
M
46. M reaches _____ of its ultimate value when the
The step response of a first order system

CO
time elapsed is equal to one time constant.

(A) 50%
A T
(B) 75%
S
(C) 63.2%
(D) 99%
C U

47. For step response of a second order system, when the damping ratio ζ <1 the response is
said to be
019
(A) critically damped 2
(B) over damped
S T
E
(C) non oscillatory
(D) under damped T
N
O
S I
48.
IS
An example for final control element in a control system is

(A) reactorDM
A valve
(B) control
M
N
(C) thermometer
(D) O
M comparator

SA T
O
M
O
C T E
49. C Use of integral control along with proportional control facilitates

(A) elimination of offset

CU
T
(B) elimination of transportation lag

A N
(C) reduction of stability time
9
(D) the increase in error signal strength
1
S IO 2 0
50. The forcing function used in frequency response analysis is

ST
C IS E
(A) step
(B) pulse
T
(C) sinusoidal
N
(D) ramp
O
M IS
S I
D
51. For plotting the Bode diagram graphs, the variables required are
M
(A) amplitude ratio, frequency and phase angle
(B)
A
amplitude ratio, frequency and time
(C)
N
amplitude ratio, frequency and controller gain
(D)
O
root locus, frequency and offset

M
52. An example for intensive property is M

(A) mass C O
(B) density
A T
(D) number of molesS
(C) volume

CU

53. Efficiency of a heat engine working on Carnot cycle between two temperature levels
depends upon the
019
(A) volume of working fluid 2
(B) pressure of working fluid
S T
E
(C) mass of working fluid
(D) two temperatures only T
N
O
S I
54.
IS of an ideal gas is
Compressibility factor

(A) zero DM
(B) unityA
M
N
(C) negative
O
(D) infinity
M

SA T
O
M
O
C T
(A) disorder E
55. C Entropy is a measure of the ______ of a system

CU
T
(B) orderly behaviour

A N
(C) temperature changes
(D) energy content
19
S IO 2 0
56. Fugacity and pressure are numerically equal, when the gas is

ST
C IS E
(A) in standard state
(B) at high pressure
T
(C) at low temperature
N
(D) in ideal state
O
M IS
S I
D
57. Van Laar equation deals with the activity coefficients in _______ solution
M
(A) binary
(B) ternary
A
(C)
N
azeotropic
(D)
O
multi component

M
58. Mgases
During Joule – Thomson expansion of

(A) entropy remains constantC
O
T
(B) enthalpy remains constant
A
(D) pressure remainsS
(C) temperature remains constant

C U constant

59. For an nth order reaction, the unit of rate constant is

(A) time-1 mole-1 019
(B) time-1 concentration(n-1) 2
(C) time-1 concentration(1-n)
S T
E
(D) concentration(n-1)
T
N
O
60. I
Arrhenius equation shows the variation of _______ with temperature
S
(A) reaction rateI
S
M
D
M
(B) rate constant
A energy
(C) activation

N order
(D) reaction
O
M
61.

SA
T
O
M
O E
Differential method of analyzing kinetic data’s is used
C (A) for testing complicated mechanism
C T
(B) when the data’s are scattered

CU
T
(C) when rate expression is simple

N
(D) when testing specific mechanism

62. A
S IO 2 0 19
For all positive reaction order and for a particular duty, the size of mixed flow reactor is

always ________ the plug flow reactor

ST
C IS E
(A) smaller than
(B) equal to
T
(C) larger than
N
(D)
O
data insufficient; can’t predict

M IS
S I
D
63. The concentration of reactant ‘A’ in a first order reaction, A→B, decreases_______ with
time. M
(A)
(B)
(C)
A linearly

O
N
A
D
exponentially
parabolically
(D) logarithmically
M
M
64.
C O
A plug flow reactor is characterized by

(A) variable residence time
A T
(C) lateral mixing S
(B) axial mixing

CU profile
(D) non – flat velocity

65. Household domestic refrigerator work on principle of ____ refrigeration cycle

(A) Carnot 019
(B) air 2
(C) absorption
S T
E
(D) vapour ejection
T
N
O
66. I
Mollier chart is a plot of
S
S
(A) temperatureIversus enthalpy
M versus entropy
D
M
(B) temperature
A versus entropy
(C) enthalpy

N
(D) temperature versus internal energy
O
M
67.

SA
T
O
M
O E
Equilibrium constant of a reversible reaction depends mainly on
C (A) initial reactant concentration
C T
(B) temperature

CU
T
(C) pressure

N
(D) amount of catalyst

68. A
S IO 2 0 19
The frequency at which the maximum amplitude ratio attained is called ____ frequency.

(A)
(B)
(C)
(D)
corner

C IS
crossover
resonant
natural T E ST
N
O
69.
M S I
Thermistors are used in ______ devices
IS
(A)
D M
voltage measuring

(B) only temperature measuring
(C)
A
only temperature compensating
(D)
N
both temperature measuring and compensating

O
70. M
At steady state condition in a process, the value of error signal is
M
(A)
(B)
zero
very large C O
(C)
(D)
negative
unity AT
S
CU

71. The desired value of a variable in a process is also called as

(A) controlled variable 019
(B) set point 2
(C) disturbance
S T
E
(D) offset
T
N
O
72. I
Freundlich equation applies to the adsorption of solute from
S
IS over a small concentration range
(A) dilute solutions
M at high pressure
D
M
(B) gaseous mixture
(C) highlyA concentrated solutions

N component liquid mixtures
(D) multi
O
M
73.

SA
T
O
M
O E
An operation carried out to recover valuable solute from the absorbing solution and
C regenerating the solution is called
C T
(A) absorption

CU
T
(B) leaching

A N
(C) stripping
(D) diffusion
19
S IO 2 0
74. Heat transfer rate is low in the case of _______ boiling.

ST
C IS E
(A) film
(B) nucleate
T
(C) sub cooled
N
(D) transition
O
M IS
S I
D
75. For most of the liquids the thermal boundary layer is thinner than the hydrodynamic
M
boundary layer when Prandtl number is

(A)
(B)
(C)
A O
N
A
D
less than unity
equal to unity
greater than unity
(D) zero
M
M
76. O
C carbonisation of coal is
The main product of high temperature

(A) tar
A T
(B) ammonia
S
(C) coke
(D) phenol
C U

77. An example for continuous vacuum filter is _________ filter

(A) plate and frame 019
(B) rotary drum 2
(C) trickling
S T
E
(D) centrifugal
T
N
O
78. I
Kopp’s rule is concerned with the calculation of
S
IS
(A) thermal conductivity
M
D
M
(B) heat capacity
A tension
(C) surface

N
(D) viscosity
O
M
79.

SA
T
O
M
O E
Cavitation occurs in a centrifugal pump when the suction pressure is
C (A) less than the vapour pressure of the liquid at that temperature
C T
(B) greater than the vapour pressure of the liquid at that temperature

CU
T
(C) equal to the vapour pressure of the liquid

N
(D) equal to the developed head

80. A
S IO
Terminal settling velocity is
2 0 19
(A)
(B)
(C)
(D)
a fluctuating velocity

C IS
ST
attained after moving one half of total distance

T E
a uniform velocity with constant acceleration
a constant velocity with no acceleration
N
O
81.
M S I
The ratio of inertial forces to viscous forces is _______ number.
IS
(A)
D Mach
M
(B) Weber
(C) Fourier
A
(D) Reynolds
N
O
82. M
Discharge in laminar flow through a pipe varies
M
(B) inversely as the pressureC
O
(A) as the square of the pipe length
drop
(C) inversely as the fluid T
viscosity
(D) as the square of theApipe radius
S
CU

83. Pressure drop in a packed bed for laminar flow is given by the _______ equation.

(A) Blake – Plummer
019
(B) Kozney – Karman 2
(C) Fanning’s
S T
E
(D) Hagen – Poiseuille
T
N
O
84. I
_____ type of closure is the weakest closure for cylindrical vessels
S
(A) HemisphericalIS
M
D
M
(B) Torispherical
(C) Flat Aplate

N
(D) Elliptical
O
M
85.

SA
T
O
M
C (A) shape
(B) diameter
O
C T E
The force due to wind load acting on a tall vessel depends upon its

CU
T
(C) height

N
(D) shape, diameter and height

86. A
S IO 2
Vertical vessels are not supported by0 19
(A)
(B)
(C)
(D)
brackets

C IS
skirts
columns
saddles T E ST
N
O
87.
M S I
Ultimate analysis of coal determines its
IS
(A)
D M
Carbon, hydrogen, nitrogen and Sulfur

(B) moisture, volatile matter and ash
(C)
A
calorific value
(D)
N
combined molecular mass

O
88. M
Steel rods are used in reinforced concrete to increase its _____ strength
M
(A)
(B)
shear
tensile C O
(C)
(D)
compressive
A
rigidity modulus
T
S
CU

89. Most suitable material for the storage of concentrated HNO3 is

(A) cast iron 019
(B) white metal 2
(C) karbate
S T
E
(D) aluminium alloys
T
N
O
90. I
The hardest known substance based on Mho scale reading is
S
(A) quartz IS
M
D
M
(B) gypsum
(C) A
diamond

(D) N
calcite
O
M
91.

SA
T
O
M
O
C (A) cutting ability
C T E
Presence of cobalt in steel improves its

(B) corrosion resistance

CU
T
(C) tensile strength

N
(D) ductility

92. A
S IO 2 0 19
Ceramic materials fabrication cannot be done by

(A)
(B)
(C)
(D)
welding

C IS
casting
extrusion
pressing T E ST
N
O
93.
M S I
A ‘rupture disc’ is provided in chemical equipments as an accessory meant for
IS
(A)
D M
relieving excess pressure

(B) creating turbulence
(C)
A
enhancing mixing rate
(D)
N
avoiding vortex formation

O
94. M
In the agitators, the power required will be changed with the increase of diameter of
agitator (D) as M
(A) D2 C O
(B) D5
AT
(C) D½
S
(D) D10
CU

95. Percentage of hydrogen in coke oven gas may be around

(A) 10 019
(B) 25 2
(C) 45
S T
E
(D) 60
T
N
O
96. I
_________ is also called as blue gas.
S
(A) Coke oven gas IS
M
D
M
(B) Water gas
A gas
(C) Natural

N gas
(D) Producer
O
M
97.

SA
T
O
M
O E
Orsat analysis is meant for
C (A) finding volumetric composition of flue gases
C T
(B) finding combustion efficiency

CU
T
(C) finding flame temperature

N
(D) calculating calorific value of fuel

98. A
S IO 2 0 19
If the value of Thiele modulus is >>>1, then the rate controlling factor is

(A)
(B)
(C)
(D)
U
C IS S
surface reaction rate
diffusion rate
pore diameter
pore length T E ST
N
O
99.
M S I
Catalyst support (carrier) is used to improve
IS
(A)
D M
surface area

(B) number of active centre
(C)
A
selectivity
(D)
N
reaction rate

O
100. M
In tanks – in – series model, the system behaviour approaches plug flow when the
M
number of tanks connected in series becomes

(A) zero C O
(B) unity
AT
(C) infinite
S
(D) fractional
CU

101. ______ is not a process step in fluid – particle heterogeneous catalytic reaction

(A) Desorption 019
(B) Absorption 2
(C) Surface reaction
S T
E
(D) Adsorption
T
N
O
102. I
BET apparatus is used to determine the _______ of a catalyst.
S
(A) pore volumeI
S
M
D
M
(B) bulk density
A surface area
(C) specific

N
(D) porosity
O
M

SA
M
T (B) C – curve O
C T E
103. The dimensionless form of step response curve (C ) is called
CO (A) E - curve
step

CU
T
(C) binomial curve

N
(D) F curve

104. A
S IO 2 0 19
For shrinking spherical particles fluid – solid non catalytic reaction ____ layer is absent

(A)
(B)
(C)
(D)
Uash
S
gas film

C IS
boundary
buffer zone T E ST
N
O
105.
M S I
For a first order reaction, half – life period is _____ the initial reactant concentration
IS
(A)
D M
independent of

(B) directly proportional to
(C)
A
inversely proportional to
(D)
N
varying exponentially with

O
106. Humidity of air can be determined by a M
M
(A)
(B)
chromatograph
sling psychrometer C O
(C)
(D)
mass spectrometer
polarimeter AT
S
CU

107. The Laplace transform of the function y(t) = sin at is

S
019
(A)
S + a2
2 2
a S T
E
(B)
S + a2
2
T
N
S
O
(C) 2
S −a
2
SI
a IS
M
M
(D) 2
S −a
2
D
A

N
108. ForM
O
distillation column, if the nature of feed is partial vapour, then the moles of liquid

SA
T
O
M
C (A) 0 < q < 1
(B) q = 0
O
C T E
flow in the stripping section (q) has the numerical limit

CU
T
(C) q > 1

N
(D) q = 1

109. A
S IO 2 0 19
The condensing temperature of a single pure substance depends only on the

(A)
(B)
(C)
(D)
U
C IS S
pressure
temperature
surface area
density T E ST
N
O
110.
M S I
Most commonly used rubber vulcanising agent is
IS
(A)
D bromine
M
(B) sulphuric acid
(C)
(D)
thiokol
sulphur A
N
O
111. M
Molasses is the starting material for the production of
M
(A)
(B)
alcohol
edible oils C O
(C)
(D)
fatty acids
hard soaps AT
S
CU

019
2
S T
E
T
N
O
SI
IS
M
A
D
M
N
O
M

SAT
CO
M
O
C T E
CU
AT N 19
S IO 2 0
U
C IS S T E ST
N
O
M IS
S I
D M
A O
N
A
D

M
M
C O
AT
S
CU

112. Essential oils are usually obtained by

(A) solvent extraction 019
(B) extractive distillation 2
(C) steam distillation
S T
E
(D) leaching
T
N
O
113. I
Top suspended basket centrifuges are used extensively in
S
IS
(A) plastic manufacture
Mrefining
D
M
(B) petroleum
(C) sugarArefining

N powder manufacture
(D) milk
O
M

SA T
M

(A) 10 2
O
C T E
114. The ratio of the diameters of the largest and smallest particles in a comminuted product is
COgenerally of the order of

CU
T
10
(B) 10

A N
(C) 106
(D) 104
19
S IO 2 0
115. For a spherical particle of diameter (Dp), the value of sphericity is

ST
C IS E
(A) 1.414
(B) 0.5
T
(C) 0
N
(D) 1
O
M IS
S I
D
116. Blake crusher is the common type of _____ crusher
M
(A) Jaw
(B) gyratory
A
(C)
N
smooth – roll
(D)
O
toothed – roll

M
117. ______ scale is only used for liquids M
with specific gravity greater than water.

(A) degree Baumme C O
(B) API
A T
(C) Twaddell
S
(D) Brix
C U

118. 1 torr pressure is equivalent to

(A) 1 Pascal 019
(B) 1 mmHg 2
(C) 1 bar
S T
E
(D) 1 psi
T
N
O
119. I
One gm mole of ideal gas occupies a volume of ______ at STP
S
(A) 22.4 liters I
S
M
D
M
3
(B) 1 m
(C) 22.4Am 3

N liter
(D) 22400
O
M

SA
M
CO (A) 1
T (B) 8 O
C T E
120. The number of moles present in 32 gms of oxygen is

CU
T
23
(C) 6.023 × 10

N
(D) 2

121. A
S IO 2 0 19
The drag coefficient in hindered settling is ________ in free settling.

(A)
(B)
(C)
(D)
greater than

C IS
same as
lesser than
T E ST
0.01 times of drag coefficient
N
O
122.
M S I
Dimension of kinematic viscosity is
IS
(A)
D MLT-1
M
(B) L2T-1
(C) L2T
A
(D) L2T-2
N
O
123. Newton’s law of viscosity relates M
(A) pressure gradient and fluid O
M
velocity
(B) concentration gradient andCgradient
rate of angular deformation

(D) viscosity and fluid A
T
(C) shear stress and velocity
temperature
S
C U

124. Friction factor for a hydraulically smooth pipe at Reynolds number, NRe = 2100 is f1. If

19
the pipe is further smoothened (roughness is reduced) the friction factor at the same value
0
of NRe, will
2
(A) increase S T
E
(B) decrease
(C) remain unchanged T
N
(D) O
increase or decrease depending on the pipe material

SI
IS oxygen by mass
M
M
125. Air contains _______
D
(A) 21%A

(B) 79%N
O
(C) 23%
M
M
O
(D) 77%

E
126. OAs the product becomes finer, the energy required for grinding
C
SA T (A) decreases
C T
T
(B) increases
CU
N
(C) is same as for coarse solid grinding

A
(D) is 1.5 times that for coarse solid grinding

19
127.
S IO
Wheat is ground into flour in a 2 0
(A)
(B)
(C)
U
C IS S
hammer crusher
roller crusher
impact mill T E ST
(D) fluid energy mill
N
O
128.
M ( ) IS
S I
Dittus – Boelter equation for heat transfer by forced convection in turbulent flow is

D ( ) ( ) ADM
hi D 0 .8
CP μ
1/3 0 .14

A ( ) ( ) ON
DG μ
(A) =0. 023
k μ k μw

0 .8 1/3
hi D DG CP μ
(B) =0. 023
k μ k
M
C μM 0 .33 0 .8
hD

CkO)
DG
(C)
k
i
=0. 0023 (
μ ) ( P

(D) h =0 .0023 G kA C
T
0. 8 2/3 1/3

i ( UDS μ ) 0 .2 0 . 47
P

C

129. The unit of thermal conductivity is

(A) W/(m oK) 019
(B) W/(gmole oK) 2
(C) W/m2 oK
S T
E
(D) J/kg oK
T
N
O
130. I
Emissivities are low for
S
IS
(A) oxidized metals
(B) paints M
(C) non A
D
metals
M
N metals
(D) polished
O
M

SA
M
O E
131. Ficks law statement is
CO (A) (heat flux) α (temperature gradient)
C T
T (B) (molar flux) α (concentration gradient)
CU
T
(C) (momentum flux) α (velocity gradient)

N
(D) (molar flux) α (pressure gradient)

132. A
S IO 2 0 19
Pressure of 0.0001 absolute psi can be measured by ______ gauge.

(A)
(B)
(C)
(D)
U
C IS S
ionization
pirani
thermocouple
Mcleoid T E ST
N
O
133.
M S I
In an adiabatic process the
IS
(A)
D M
heat transfer is zero

(B) temperature change is zero
(C)
A
work done is infinite
(D)
N
enthalpy remains constant

O
134. M
Second law of thermodynamics is concerned with the
M
(A) amount of energy transferred
C
(B) irreversible processes only
O
(D) direction of energyA
T
(C) non cyclic processes only
transfer
S
C U

135. One ton of refrigeration capacity is equivalent to the heat removal rate of

(A) 1 kcal/sec 019
(B) 200 BTU/hr 2
(C) 200 BTU/day
S T
E
(D) 200 B TU/min
T
N
O
136. I
For transportation of materials which are lumpy, abrasive and hot we use
S
(A) belt conveyor IS
M
M
(B) apron conveyor
D
Aof(A)theorabove
(C) either (B)

N
(D) None
O
M

S
137.

AT
M
O
CO (A) diesel oil
C T
(B) naphtha E
Octane number is a measure of anti-knock properties of

T
(C) gasoline
CU
N
(D) jet fuel

138. A
S IO 0 1
Titanium dioxide is a pigment of colour
2
9

U S T
(A) blue
(B) black S
C IS E
(C) yellow
(D) white T
N
O
139.
M S I
For precise control of fluid flow rate the best performance is obtained by

IS
(A)

D gate valve
M
A
(B) check valve
(C) D
globe valve
(D) A
None of the above
N
O
140. Steam traps are used to
M
M
(A) remove condensate
C
(B) remove liquid from vapour O
(D) None of the above T
(C) regulate pressure

SA
CU

141. Preheating of food into an evaporator

(A) reduces economy 019
(B) increases the heat transfer are 2
(C) decreases the heat transfer are
S T
E
(D) requires higher pressure for operation
T
N
O
142. I
To extract oil from oil seeds the following equipment is used
S
IS
(A) centrifugal extractor
(B) Bollman M

M
D extractor
(C) pulseAcolumn

N column
(D) packed
O
M

SA
M
O
CO (A) tray drier
C T
T (B) rotary drier E
143. Sticky material is dried in a

CU
T
(C) fluid bed drier

N
(D) spouted bed drier

144. A
S IO
Unit of fugacity is
2 0 19
(A)
(B)
(C)
(D)
U
C IS S
atm./mole
atm.
atm/K
None of the above T E ST
N
O
145.
M S I
For a spontaneous process, G is
IS
(A)
D negative
M
(B) zero
(C) positive
A
(D)
N
None of the above

O
146. M
The most suitable reactor for autocatalytic reaction is
M
(A)
(B)
plug flow
CSTR C O
(C)
(D)
recycle reactor
CSTRs in seriesAT
S
CU

147. For prevention of fluid leakage around moving ports, normal device used is

(A) stuffing box 019
(B) bellow 2
(C) packless joint
S T
E
(D) expansion loop
T
N
O
148. I
Gas oil is converted to gasoline by the process of
S
(A) stabilizationI
S
(B) cracking M
A
(C) coking
D
M
N
(D) isomerisation
O
M

SA
M
O
CO (A) viscous liquor
C T
T (B) scaling liquor E
149. Long-tube vertical evaporators have excellent performance for

CU
T
(C) salting liquor

N
(D) foamy liquor

150. A
S IO
Cascade control means
2 0 19
(A)
(B)
(C)
(D)
U
C IS S
two feed forward

T
two feed backs or more
None of the above
E
T
one feed back and one feed forward
S
N
O
M IS
S I
D M
A O
N
A
D

M
M
C O
AT
S
CU

CHEMICAL ENGINEERING 9 - ANSWER KEY
1
20 CODE: 603
TEST
QN. NO. KEY QN. NO. KEY QN. NO. T KEY QN. NO. KEY QN. NO. KEY
E S

1 A 26 D 51 T A 76 C 101 B
2 C 27 C N
O52 B 77 B 102 C

I
3 B 28 B
ISS 53 D 78 B 103 D
4 C 29 B M 54 B 79 A 104 B
5 C 30 D AD 55
M A 80 D 105 A

6 B 31 CN 56 D 81 D 106 B
OD
7 A 32 M 57 A 82 D 107 B
8
9
10
D
C
D
33
34 T C
SA
35
O
M D
B
A
O
C TE
59
60
58
C
B
B 83
84
85
C
D
B 108
109
110
A
A
D
11
12
A
B
U
C 36
37
B
C
AT N
61
62
A
C
86
87
19
D
A
111
112
A
C
13 B 38 D
S I O 63 B 88
2 0 B 113 C

14 C 39 A 64 C 89 D 114 D
15 C 40 C 65 C ST
90 C 115 D
16
17
A
D
41
42 C IS
C
D
66
67
C
B
O
N
T E 91
92
A
A
116
117
A
C
18 D 43 D
M 68
IS
SCI 93 A 118 B

D
19 A 44 D 69 D 94 B 119 A
20 B 45 C 70 M A 95 D 120 D
21
22
23
C
C
D
46
47
48
A C
D
B O
71
N
72
73
A
D B
A
C
96
97
98
B
A
B
121
122
123
A
B
C
M
24 B 49 A 74
MA 99 A 124 A

CO
25 A 50 C 75 C 100 C 125 C

AT
S
CU

019
2
QN. NO. KEY
S T
TE
126 B
127 B N
O
128 B SI
129 A IS
M
130 D A
D
M
131 B N
O
132 D M
133
134
135
A
D
D SA
T
CO
M
O
C TE
136
137
B
C
CU
AT N 19
138 D
S I O 2 0
139 C
140 A ST
141
142
C
B C IS O
N
T E
143 A
M IS
S I
D
144 B
145 A M
146
147
148
C
A
B
A O
N
A
D

M
149 D
M
CO
150 C

AT
S
CU