TNPSC Executive Officer Grade-I Chemical Engineering

Question 30 :
Rittinger's crushing law states that
work required to form a particle of any size is proportional to the square of the surface to volume ratio of the product.
work required to form a particle of a particular size is proportional to the square root of the surface to volume ratio of the product.
work required in crushing is proportional to the new surface created
for a given machine and feed, crushing efficiency is dependent on the size of feed and product.

Question 31 :
Work index is defined as the
gross energy [kWh/ton of feed] needed to reduce very large feed to such a size that 80% of the product passes a 100 micron screen.
energy needed to crush one ton of feed to 200 microns
energy [kWh/ton of feed] needed to crush small feed to such a size that 80% of the product passes a 200 mesh screen.
energy needed to crush one ton of feed to 100 microns.
Explanation:

Question 32 :
The operating speed of a ball mill should be ............. the critical speed.
less than
much more than
at least equal to
none of these

Question 33 :
A fluid energy mill is used for
cutting
grinding
ultragrinding
crushing

Question 34 :
For the preliminary breaking of hard rock, we use
gyratory crusher
ball mill
tube mill
squirrel-cage disintegrator.

Question 35 :
With increase in the capacity of screens the effectiveness
Remains unchanged
Increases
Decreases
Increases exponentially

Question 36 :
A classifier is a device that
Separates solids into two fractions
Virtually removes all the particles from a liquid
Settles the particles from a liquid by sedimentation
Helps to suspend the particle in the liquid

Question 37 :
Filter medium resistance is that offered by the
filter cloth
embedded particles in the septum
filter cloth and the embedded particle collectively
none of these

Question 38 :
The porosity of a compressible cake is
minimum at the filter medium
minimum at the upstream face
maximum at the filter medium
same throughout the thickness of cake.

Question 39 :
The most common filter aid is
diatomaceous earth
calcium silicate
sodium carbonate
silica gel.

Question 40 :
Catalyst used in manufacture of sulphuric acid by chamber and contact processes are respectively
V₂O₅ and Cr₂O₅
oxides of nitrogen and Cr2O5
V₂O₅ on a porous carrier and oxides of nitrogen
oxides of nitrogen and V₂O₅ on a porous carrier.

Question 41 :
Contact process
yields acid of higher concentration than chamber process
yields acid of lower concentration than chamber process
is obsolete
eliminates absorber.

Question 42 :
Which of the following glasses is optically important for their high index of refraction and dispersion
Sodalime glass
Borosilicate glass
Float glass
Lead glass

Question 43 :
Cement mainly contains
CaO, SiO₂, Al₂O₃
MgO, SiO₂, K₂O
Al₂O₃, MgO, Fe₂O₃
CaO, MgO, K₂O

Question 44 :
Gypsum is
calcium chloride
potassium sulphate
sodium sulphate
calcium sulphate

Question 45 :
Oil is
a mixture of glycerides
a mixture of glycerides of fatty acids
solid at normal temperature
ester of alcohols other than glycerin.

Question 46 :
Unsaturated oils compared to saturated oils have
lower melting point and higher reactivity to oxygen
higher melting point and higher reactivity to oxygen
lower melting point and lower reactivity to oxygen
higher melting point and lower reactivity to oxygen

Question 47 :
Solvent used for extraction of oil is
hexane
methyl ethyl ketone
furfurol
none of these

Question 48 :
Detergents are manufactured from
Fatty acids
Glycerin
Fats
Fatty alcohols.

Question 49 :
Catalyst used in hydrogenation of oil is
nickel
platinum
iron
alumina.

Question 50 :
Which of the following is a detergent
Fatty alcohol
Alkyl benzene sulphonate
Fatty acids
Methylene chloride

Question 51 :
The octane number of gasoline is increased by the addition of
Tetraethyl Lead (TEL)
Organophosphates
Sulphur
Greases

Question 52 :
The ideal pulp for the manufacture of paper should have high
cellulose content
lignin content
both (A) and (B)
none of these

Question 53 :
Bleaching of paper pulp is done with
activated clay
bromine
chlorine or chlorine dioxide
magnesium sulphite

Question 54 :
Which of the following is super-efractory
Silicon carbide
Insulating brick
Magnesia
High alumina refractory

Question 55 :
Which of the following is not an antibiotic
Penicillin
Streptomycin
Tetracyclin
Quinine

Question 56 :
Penicillin is seperated from fermented broth by
extraction with amyl or butyl acetate
ternary azeotropic distillation
evaporation in calendria
extractive distillation

Question 57 :
Carborundum consists mainly of
bauxite
silicon carbide
boron carbide
calcium carbide

Question 58 :
Fire clay is
a basic refractory
an acidic refractory
a neutral refractory
not a refractory material

Question 59 :
Calcination of limestone is not done in a ............ kiln for producing lime.
vertical shaft
rotary
fluidized bed
fixed bed

Question 60 :
A Newtonian fluid is one which
is frictionless and imcompressible
has a linear relationship between the magnitude of applied shear stress and the resulting rate of deformation.
has a non-linear relationship between the magnitude of applied shear stress and the resulting rate of deformation
has a vapour pressure of 1 N/m² at 25⁰ C

Question 61 :
Which curve in the given figure represents Newtonian fluid
A
B
C
E
Explanation:

Question 62 :
Which of the following has the form of a Mach number (NMa)
v/√gl
v/c
P/pv²
v²Lp/σ

Question 63 :
Friction factor f = 16/N_Re is valid for
laminar flow only
both laminar and turbulent flows
turbulent flow only
transition region only

Question 64 :
The momentum correction factor (β) is used in fluid flow problems to account for
change in pressure
change in total energy
change in direction of flow
non-uniform direction of velocities at inlet and outlet sections.

Question 65 :
Cavitation in fluid flow occurs when
the pressure of flow reaches to a value close to its vapour pressure
the total energy increase suddenly
the total energy decreases suddenly
the fluid velocity decreases to zero.

Question 66 :
Select the correct relation for centrifugal pumps at equal efficiencies.

Question 67 :
For a specific impeller diameter, fixed impeller speed of a centrifugal pump, and constant density,
NPSH required decreases with increase in the capacity
NPSH required increases with increase in the capacity
NPSH required increases with increase in the capacity
NPSH required and NPSH available both increase with increase in the capacity

Question 68 :
Cavitation in centrifugal pumps is caused by
high fluid velocity at the suction
low barometric pressure
low suction pressure
high suction pressure

Question 69 :
When heat is transferred by a chain of molecules from the hot area of an object to a colder area, the process of heat transfer is called
natural convection
forced convection
conduction
radiation

Question 70 :
The thermal diffusivity of a material is defined as
K/(pCp)
(pCp)/k
(kCp)/p
(kp)/Cp

Question 71 :
The Fourier number (N) is defined as
tL²/∝
∝t/r²
hL/k
hk/L

Question 72 :
In forced convection the heat transfer depends on
N^Re only
N^Pr only
N^Reand N^Pr
none of these

Question 73 :
Dittus-Boelter equation, N_Nu=0.023 (N_Re) (N_Pr)ⁿ, where n = 0.4 for hot fluid and n = 0.3 for cold fluid, is applicable for
10000Re<1.2×10⁵
0.7Pr<120
L/D>60
all of these

Question 75 :
In a finned tube heat exchanger
only heat transfer area is augmented
only film coefficient is augmented
both heat transfer area & film coefficient are augmented
none of these

Question 76 :
25 per cent cut segmental baffle means
a baffle plate whose height is 25% of the inside diameter of the shell
a baffle plate whose height is 75% of the inside diameter of the shell
a baffle plate whose height is 25% of the inside diameter of the tube
a baffle plate whose height is 25% of the length of tube.

Question 77 :
Capacity of an evaporator is defined as
the number of kilograms of solvent vapourized per hour
the number of kilograms of solvent vapourized per kilogram of steam fed to the evaporator
the number of kilograms of steam consumed per hour
the number of kilograms of steam consumed per kilogram of sovent vapourized

Question 78 :
Economy of an evaporator is defined as
the number of kilograms of steam consumed per hour
the number of kilograms of steam consumed per kilogram of solvent vaporized
the number of kilograms of solvent vaporized per hour
the number of kilograms of solvent vaporized per kilogram of steam fed to the evaporator

Question 79 :

Match List I correctly with List II and select your answer using the codes given below :

List I	List II
a) Iλ =c₁^λ-5/e^c2/λT -1	1. Wien's Law
b) λT = constant	2. Planck's Law
c) E_b =σT⁴	3. Nusselt equation
d) h = 0.943 [k³ƒp²ƒλ_g/μ_lL∆Tƒ]^1/4	4. Stefan-Boltzmann's Law

Codes :

Question 80 :
If n is the order of reaction, then unit of rate constant is
1/(time) (concentration)^n-1
(time)-1 (concentration)^n-1
(time)^n-1 (concentration)
(time^-1) (concentration)^1-n

Question 81 :
The rate of reaction doubles for each 10⁰C rise in temperature. What activation energy would this suggest at a temperature 25⁰C
11810 cal/mol
11820 cal/mol
11825 cal/mol
11830 cal/mol

Question 82 :
Sum of the powers of the concentration term in the rate equation is called the
order of reaction
molecularity
elementary reaction
none of these

Question 83 :
Transition state theory predicts the temperature dependency of reaction rate as
K ∝ T
K∝ e ^-E/RT
K ∝ Te ^-E/RT
K ∝ Te ^E/RT

Question 84 :
The reaction Cl₂+H₂ → 2HCL is carried out in the presence of sunlight. What is the order of reaction
0
1
2
3

Question 85 :
Integral method is used for analysis of kinetic data
for testing complicated mechanism
when the data are scattered
when rate expressions are simple
none of these

Question 86 :
A batch reactor is characterized by
Constant residence tim
Variation in extent of reaction and proportion of the reaction mixture with time
Variation in reactor volume
Very low conversion

Question 87 :
What is the partial pressure of a gas mixture containing 50 mol % A and 50 mol% inert in a closed vessel at pressure of 10 atm and temperature of 150⁰C
10 atm
4 atm
5 atm
6 atm

Question 88 :
The half-life time t_1/2 = 0.693 / k. Then the reaction is of
Zero order
First order
Second order
Third order

Question 89 :
Oil is hydrogenated using nickel catalyst in a
Batch reactor
Fluidized bed reactor
Slurry reactor
Fixed bed reactor

Question 90 :
Space velocity of 5 hr^-1 means that
Five reactor volume of feed (at specified conditions) are being fed into the reactor per hour
After every 5 hours, the reactor is being filled with the feed
Cent per cent conversion can be achieved in at least 5 hours
A fixed conversion of a given batch of feed takes 5 hours

Question 91 :
For a recycle reactor the recycle ratio is given by
R= Volume of fluid returned to the reactor inlet/Volume of fluid leaving the system
R = Volume of fluid leaving the system/Volume of fluid returned to the reactor outlet
R= Volume of fluid leaving the system/Volume of fluid retained in the reactor
R= Volume of fluid retained in the reactor/Volume of fluid leaving the system

Question 92 :
Fluidised bed reactor is characterized by
uniformity of temperature
comparatively smaller equipment
very small pressure drop
absence of continuous catalyst regeneration facility

Question 93 :
In an ideal P.F.R at steady state conditions
the composition of reactants remains constant along a flow path
the conversion of the reactant varies from point to point along a flow path
there is no lateral mixing of fluid
all of these.

Question 94 :
Arr henius equation shows the variation of ......... with temperature
Reaction rate
Rate constant
Energy of activation
Frequency factor.

Question 95 :
When a catayst alters rate of a chemical reaction, the value of rate constant
increase
decreases
constant
remains increasing or decreasing depending upon the type of reaction

Question 96 :
For a batch system, the selectivity (S) is
S = Moles of desired product formed/Moles of undesired product formed
S= Moles of desired product formed/Moles of feed admitted to the system
S= Moles of undesired product formed/Moles of desired product formed
S = Moles of desired product formed/ Volume of fluid leaving the system

Question 97 :
For a reaction of zero order, the rate of reaction is
independent of the concentration
dependent on concentration
dependent on temperature
independent of temperature

Question 98 :
Inversion of cane sugar is a
Bimolecular reaction with second order
Bimolecular reaction with first order
Unimolecular reaction with second order
Pseudo-unimolecular reaction with first order.

Question 99 :
A photochemical reaction is
Catalyzed by light
Accompanied with emission of light
Initiated by light
Used to convert heat energy to light

Question 100 :
Transfer function of a second order system is
1/r²S^{2^+2६rS+1}
1/r²S^{2^+2rS+1}
1/r²S^{2^+2६r+1}
None of these

Question 101 :
Response of a system to a sinusoidal input is called
impulse response
unit step response
frequency response
none of these

Question 102 :
Which one of the following is a first order system
Damped vibrator
Mercury in glass thermometer kept in boiling water
Interacting system of two tanks in series
Non-interacting system of two tanks in series

Question 103 :
The time required for the response to come within ± 5% of its ultimate value & remain there is known as
Rise time
Response time
Period of oscillation
Decay ratio

Question 104 :
Overshoot and decay ratio are related as
Overshoot = Decay Ratio
Overshoot = (Decay Ratio)²
Overshoot = (Decay Ratio)^1/2
Overshoot = (Decay Ratio)^-1/2

Question 105 :
The difference between the new steady state value & the original value is called as
offset
error
deviation
none of these

Question 106 :
Tracking of missiles & aircrafts are the well known examples of
Servo-type problem
Regulator problem
Response problem
Set point problem

Question 107 :
Transfer function of a transportation lag is

Question 108 :
The transfer function of a process is 1/16s²+8s+4 . If a step change is introduced into the system, then the response will be
overdamped
underdamped
critically damped
none of these

Question 109 :
Dead-time compensation is also referred as
Smith predictor
Single loop control system
Ratio controller
Adaptive controller.

Question 110 :
Hot wire anemometer is used to measure
Temperature
Thermal conductivity
Specific heat
Flow rate of fluids.

Question 111 :
The general condition for stability of a continuous system is
the roots of the characteristic equation fall in the right half of the complex plane.
the roots of the characteristic equation fall in the left half of the complex plane
the roots of the characteristic equation fall in the centre of the complex plane

Question 112 :
Controlling of more than one feedback loop is known as
cascade control
ratio control
feed forward control
feed backward control

Question 113 :
The error required to move the value from fully closed to fully open is termed as
offset
set point
differential gap
proportional band

Question 114 :
Gain margin is equal to the
Amplitude ratio
Gain in P controller
Gain in Pl controller
Reciprocal of Amplitude ratio.

Question 115 :
A sinusoidal variation in the input passing through a linear first order system
becomes more oscillatory (frequency increase)
becomes less oscillatory (frequency decreases)
gets amplified (magnitude increases)
gets attenuated (magnitude decreases)

Question 116 :
The time constant of a first order process with resistance R & capacitance C is
R+C
R-C
RC
1/RC

Question 117 :
The basic principle involved in the measurement of temperature by thermocouple is
Raman effect
Scebeck effect
Peltier & Seebeck effect
Thomson & Peltier effect.

Question 118 :
A proportional controller with a gain of KC is used to control a first order process. The offset will increase if
KC is reduced
KC is increased
Integral control action is introduced
Derivative control action is introduced.

Question 119 :
The primary task of a microprocessor based controller is
implementation of control algorithm
provide static & dynamic display on the monitor
provide data acquisition & storage
all of these

Question 120 :
For a differential function f(x) to have maximum, df/dx & d²f/dx2 should be
zero & negative
negative & zero
zero & positive
positive & zero

Question 121 :
If p & q are roots of x²+px+q=0 then
p=1
p=2
p=0
p=-2

Question 122 :
Integrating factor of differential equation cos x dy/dx + y sin x = 1 is
cos x
tan x
sec x
sin x

Question 123 :
Differential equation for y = A cos ∝ x + B sin ∝x, where A & B are arbitary constants, is
d²y/dx²- ∝²y=0
d²y/dx²+ ∝²y=0
d²y/dx²+ ∝y=0
d²y/dx²- ∝y=0

Question 124 :
The first differentiation of a constant is equal to.
1
> 1
< 1
0

Question 125 :
The PDE ∂²u/∂x²+∂²u/∂y² = f(x,y) is called as
Heat equation
Wave equation
Laplace equation
Poisson's equation

Question 126 :
The auxiliary equation of (aD²+bD+c) = 0 is having two real & distinct roots m₁ & m_² then the general solution is
y=Ae^m₁y+Be^m₂y
y= Ae^m₁x+Be^m₂x
y=(Ax+B)e^m₁x
y=(Ax+B)e^m₂x

Question 127 :
Solution of differential equation xdy-ydx=0 represents
Rectangular hyperbola
Straight line passing through origin
Parabola whose vertex is at origin
Circle whose centre is at origin

Question 128 :
Order & degree of differential equation d²y/dx²={y+[dy/dx]²}^1/4 are
4 & 2
1 & 2
1 & 4
2 & 4

Question 129 :
The number of real roots of the equation

(x-1)²+(x-2)²+(x-3)² = 0 is
2
1
0
3

Question 130 :
The solution for L (t² e^2t) is
2/s³
2/(s-2)³
2(s+2)³
4/(s+2)³

Question 131 :
The line y = mx +1 is a tangent to y² = 4x if m equals
4
2
1
-1

Question 132 :
The sum of the infinite series 3+1+1/3+(1/3)²+.........(1/3)ⁿ+.......... is
9
9/2
15/2
∞

Question 133 :
What type of graph sheet is used to get a straight line by plotting (x,y) for the equation y=axⁿ
Semi-log graph
Log-Log graph
Polar graph
None of these

Question 134 :
Which one of the following is a method of curve fitting
Method of group averages
Least square method
Method of moments
all of these

Question 135 :
The normal equation for fitting a straight line y = ax+b is

Question 136 :
If a chemical substance disintegrates at a rate inversely proportional to the square of the amount present at any instant, what is the differential equation governing this law
dN/dx ∝ 1/N²
dN/dt ∝ 1/N
dN/dt ∝ 1/N²
dN²/dt² ∝ 1/N

Question 137 :
How many arbitrary constants will be there in the solution of second order differential equation
Three
One
Two
Zero

Question 138 :
The solution for the equation ax²+bx+c=0 is given by

Question 139 :
The equation to find the roots by Regula falsi method is

Question 140 :
In a distillation operation, the heat removed in condenser
remains unaffected with change in reflux ratio
increases with increase in reflux ratio
decreases with increase in reflux ratio
and the heat required in reboiler decrease with increase in reflux ratio.

Question 141 :
Relative humidity is the ratio of
partial pressure of the vapour to the vapour pressure of the liquid at room temperature
partial pressure of the vapour to the vapour pressure of the liquid at gas temperature
actual humidity to saturation humidity
none of these

Question 142 :
In concurrent liquid-liquid extraction, the solvent B is used to separate solute C from a given solution A and C, The liquids A and B are insoluble. the slop of the operating line for each state will be
zero
positive
infinity
negative

Question 143 :
At plait point of a ternary system
the selectivity of solvent will be unity
the distribution coefficient for solute will be unity
the density difference between the two equilibrium phases becomes zero
all of these

Question 144 :
in counter-current liquid-liquid extraction, the maximum concentration of solute in extract layer
is that corresponding to equilibrium with the incoming feed
is less than the concentration corresponding to equilibrium with the incoming feed
can be increased than that obtained in (A) above by using raffinate reflux
none of these

Question 145 :
Absorption factor is defined as
S₂/S₁
S₁ × S₂
S₂ - S₁
S₁/S₂

Question 146 :
Desorption of the absorbed solute by solvent is called
reverse osmosis
dialysis
sublimation
elution

Question 147 :
Higher hold up of the solid in the rotary drier results in
increased drying action
poor exposure of the solid to the gas
an increase in power required for operating the drier
all of these

Question 148 :
Minimum number of ideal stages are required in a fractionating column when the reflux ratio is equal to
minimum reflux ratio
optimum reflux ratio
zero
infinity

Question 149 :
Constant rate period is that drying period during which
the rate of vaporization per units of drying surface area is constant
the rate of vaporization continually decreases with time.
the rate of vaporization continually increases with time
the moisture content of the substance remains constant

Question 150 :
Match List I correctly with List II and select your answer using the codes given below :

List I List II

a) Distillation 1. Solvent

b) Absorption 2. Heat

c) Adsorption 3. Absorbent

d) Ion exchange 4. Resin
A-2, B-1, C-3, D-4
A-3, B-1, C-2, D-4
A-4, B-3, C-2, D-1
A-2, B-4, C-1, D-3

Question 151 :
HETP is numerically equal to HTU only when operating line
lies below the equilibrium line
lies above the equilibrium line
is parallel to equilibrium lines
is far from the equilibrium lines.

Question 152 :
Absorption accompanied by heat evolution results in
increased capacity of the absorber
increase in equilibrium solubility
decrease in equilibrium solubility
none of these

Question 153 :
Humidification involves mass transfer between a pure liquid phase and a fixed gas which is
insoluble in the liquid
soluble in the liquid
non-ideal in nature
at a fixed temperature

Question 154 :
The equipment frequently used for adiabatic humidification operation with recirculating liquid is
natural draft cooling tower
induced draft cooling tower
spray chamber
none of these

Question 155 :
Flooding in a column results due to
high pressure drop
low pressure drop
low velocity of the liquid
high velocity of the liquid

Question 156 :
If the selectivity of the solvent used in liquid-liquid extraction is unity
any degree of separation of solute is possible
only little amount of solute may be seperated
no separation is possible
none of these

Question 157 :
The most economical range of absorption factor is
0 to 0.5
0 to 3
1.25 to 2
5 to 15

Question 158 :

Match List I correctly with List II and select your answer using the codes given below :

List I	List II
a) Underwood's equation	1. Number of real trays
b) Fenske's equation	2. Column diameter
c) Gilliland's equation	3. Minimum number of ideal trays
d) Vapour velocity at flooding	4. Actual number of ideal trays
	5. Actual number of ideal trays
	6. Tray efficiency

Question 159 :
The rate of drying during constant-rate period
is unaffected by the air humidity
increases with increased air humidity
decreases with increased air humidity
increases linearly with increase in air humidity

Question 160 :
The expansion of term "HAZOP" is
Hazard operation
Hazard operability studies
Hazard zone
None of these

Question 161 :
Which is not a chemical coagulant
Aluminium sulphate
Ferrous sulphate
Hydrated lime
None of these

Question 162 :
Match List I relating health hazards correctly with List II and select your answer using the codes given below :

List I List II

a) Irritant 1. CO₂

b) Asphyxiant 2. Chlorine

c) Lung damage 3. Lead

d) systemic poison 4. Dust
A-4, B-3, C-2, D-1
A-2, B-1, C-4, D-3
A-2, B-4, C-1, D-3
none of these

Question 163 :
Radioactive substances present in the polluted water stream can be removed by
biological treatment
coagulation & filtration
adsorption in ion-exchange materials
all of these

Question 164 :
Fault free analysis is an effective tool to identify
the system failure which results in loss
the potential of malfunction of the equipment
the areas of concentration of loss producing events
none of these

Question 165 :
Correct use of 'factor of safety' is very important in equipment design. It is defined as the ratio of the
ultimate stress to breaking stress
ultimate stress to working stress
working stress to ultimate stress
none of these

Question 166 :
Chemical foam extinguishers are applicable only for
solid fire
liquid fire
gaseous fire
all of these

Question 167 :
Factor of safety or overdesign factor in heat transfer equipment is about ........... per cent more than the actual theoretical design factor.
15-20
10-15
5-10
20-25

Question 168 :
Both liquid fire and gaseous fire can be extinguished by
water gas extinguishers
mechanical foam extinguishers
carbon dioxide extinguishers
all of these

Question 169 :
In water chemical treatment plant, use of chloramines ensures
disinfection
taste and odour control
weed control in reservoirs
removal of permanent hardness

Question 170 :
Which of the following is the most lethal water pollutant
Phenol and cyanide.
Chlorine
Alkalis
Suspended solids.

Question 171 :
Freshwater carrying pipelines in chemical industries are coloured with
green
brown
yellow
red

Question 172 :
Which of the following processes is involved in the biochemical treatment of sewage effluents
Oxidation
Reduction
Dehydration
Hydrogenation

Question 173 :
Accidents in chemical plants are mostly due to
faulty operating procedures
improper layout of the equipment
failure of equipment
inadequate equipment design

Question 174 :
Which one of the following is not a main industrial heat source
Electricity
Smoking
Chemical action
None of these

Question 175 :
Which of the following is not a natural source of air pollution
Volcanic cruption and lightning discharges
Biological decay of vegetable matter
Photochemical oxidation of organic matter
None of these

Question 176 :
Radioactive solid nuclear wastes are disposed off by
high temperature incineration
pathological incineration
pyrolysis
underground burial in concrete containers.

Question 177 :
Carbon monoxide is pollutant, which causes
respiratory disease
asphyxiation leading to death
retardation in crop growth
damage to building materials

Question 178 :
Four major constituents of atmospheric air are
1. N²
2. Ar
3. O²
4. CO²
^{Arrange them in ascending order of their % in air :}
IV,II,III,I
I,IV,II,III
III,IV,II,I
I,III,IV,II

Question 179 :
The total capital investment for a chemical process plant comprises the fixed capital investment and the
coverhead cost
working capital
indirect production cost
direct production cost

Question 180 :
In a manufacturing industry, break-even point occurs when
the total annual rate of production equals the assigned value
the total annual product cost equals the total annual sales
the annual profit equals the expected value
the annual sales equals the fixed cost

Question 181 :

Match List I correctly with List II and select your answer using the codes given below :

List I	List II
a) Capitalized cost	1. Comparing alternative investment choices
b) Unamortized value	2. Updating cost data of equipment
c) Pay-out period	3. Profitability evaluation
d) Cost index	4. Cost accounting
	5. Replacement decisions
	6. Working capital

Question 182 :
An investment of Rs. 1000 is carrying an interest of 10% compounded quarterly. The value of the investment at the end of five years will be
1000 [1+0.1/4]²⁰
1000(1+0.10)²⁰
1000 [1+0.1/4]⁵
1000 [1+0.1/2]⁵

Question 183 :
P is the investment made on an equipment, S is its salvage value and n is the life of the equipment in years. The depreciation for the m^th year by the sum-of-year-digit method will be
P-S/n
1-[P/S]^m
m/n(P-S)
2(n-m+1)/n(n+1) (P-S)

Question 184 :

Match List I (Terminology used in plant economics) correctly with List II (Factor) and select your answer using the codes given below :

List I	List II
a) Lang factor for a chemical plant	1. Ratio of gross annual sales to the fixed capital investment.
b) Depreciation	2. Ratio of capital investment to the delivered cost of major equipment.
c) Break-even point	3. It figures in the calculation of income tax liability on cash flows from an investment.
d) Turnover ratio	4. It is the point of intersection of total cost and sales revenue.

Question 185 :
Pick out the wrong statement :
Net worth means paid up share capital and reserve & surplus (i.e. share-holder's equity)
Return on equity = profit after tax/net worth
Working capital turnover ratio = sales / net working capital
Total cost of production is more than net sales realization (NSR) at break-even point.

Question 186 :
Utilities cost in the operation of chemical process plant comes under the
plant overhead cost
fixed charges
direct production cost
general expenses.

Question 187 :
'Six tenth factor' rule is used for estimating the
equipment installation cost
equipment cost by scaling
cost of piping
utilities cost

Question 188 :
Direct costs component of the fixed capital consists of
contingency
on-site and off-site costs
labour costs
raw material costs

Question 189 :
A series of equal payments (e.g., deposit or cost) made at equal intervals of time is known as
perpetuity
capital charge factor
annuity
future worth.

Question 190 :
Payback method for measurement of return on investment
gives a correct picture of profitability
underemphasizes liquidity
does not measure the discounted rate of return
takes into account the cash inflows after the recovery of investments.

Question 191 :
A balance sheet for an industrial concern shows
the financial condition at any given time
only current assets
only fixed assets
current and fixed assets

Question 192 :
Chemical engineering plant cost index is used for finding the present cost of a particular chemical plant, if the cost of similar plant at some time in the past is known. the present cost of the plant =

Original cost × [index value at present / index value at the time of original cost was obtained]

The most major component of this cost index is
fabricated equipment and machinery
process instruments and control
pumps and compressor
electrical equipment and material

Question 193 :
Pick out the wrong statement :
Gross margin = Net income - Net expenditure
Net sales realization (NSR) = Gross sales - Selling expenses
At break-even point, NSR is more than the total production cost
Net profit = Gross margin - Depreciation - Interest

Question 194 :
Gantt chart or Bar chart is helpful in
efficient utilization of man power and machines
preparing production schedule
efficient despatching of products
inventory control

Question 195 :
Which of the following is not a principle of Pinch Technology
Do not use a hot utility below the pinch point
Do not use a cold utility above the pinch point
Avoid loops in the heat integration system
none of these

Question 196 :
If an amount R is paid at the end of every year for n years then the net present value of the annuity at an interest rate of i is
R[(1+i)ⁿ-1/i]
R[(1+i)ⁿ-1/i(1+i)ⁿ]
R(1+i)ⁿ
R/(1+i)ⁿ

Question 197 :
Optimum economic pipe diameter for fluid is determined by the
viscosity of the fluid
density of the fluid
total cost consideration (pumping cost plus fixed cost of the pipe)
none of these

Question 198 :
Operating profit of a chemical plant is equal to
profit before interest & tax
profit after tax plus depreciation
net profit + tax
profit after tax

Question 199 :
Which of the following is not related to the flow diagram in the chemical process industries
Qualitative flow diagram
Quantitative flow diagram
Combined detail flow diagram
None of these

List I	List II
a) Distillation	1. Solvent
b) Absorption	2. Heat
c) Adsorption	3. Absorbent
d) Ion exchange	4. Resin

List I	List II
a) Irritant	1. CO₂
b) Asphyxiant	2. Chlorine
c) Lung damage	3. Lead
d) systemic poison	4. Dust