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CHELE > CPI, IPC & Equipment & Plant Design > Flashcards

CPI, IPC & Equipment & Plant Design Flashcards

1
Q

Oxidation of SO2
to SO3 is favored by
A. low temperature and low pressure.
B. low temperature and high pressure.
C. high temperature and low pressure.
D. high temperature and high pressure.

A

b. low temperature & high pressure

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2
Q

Gun powder, an explosive, comprises of
charcoal, sulfur and ____

A

b. saltpeter

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3
Q

The starting raw material for the manufacture
of alum is ____.
A. alumina
B. gypsum
C. bauxite
D. ammonium bicarbonate

A

c. Bauxite

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4
Q

Paper pulp produced by kraft/sulfate process
is _____.
A. bleached easily
B. dull white in color
C. strong & fibrous
D. dark colored

A

C. Strong & fibrous

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5
Q

Claude process of gas liquefaction employs
A. merely compression of gas beyond its critical pressure.
B. Joule-Thomson expansion cooling.
C. heat exchange with colder stream.
D. adiabatic expansion against a piston or in a turbine

A

d

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6
Q

Viscose rayon is chemically ____.
A. cellulose nitrate
B. regenerated cellulose nitrate
C. cellulose acetate
D. regenerated cellulose acetate

A

d

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7
Q

Styrene is produced from ethyl benzene by
the process of _______.
A. dehydrogenation
B. oxidation
C. alkylation
D. dehydration

A

a. dehydrogentation

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8
Q

Gelatin which is a nitrogenous organic protein is obtained by the hydrolysis of _____
a. tannin
b. molasses
c. chitin
d. collagen

A

d. collagen

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9
Q

Sucrose content in the raw juice extracted from sugar cane is about ____ %
a. 1-2
b. 15-20
c. 50-60
d. 80-85

A

b. 15-20%

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10
Q

Fusel oil is a/an
A. essential oil.
B. extract from medicinal herbs.
C.mixture of higher molecular weight alcohols (a byproduct obtained during production of alcohol from molasses).
D. none of these.

A

c

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11
Q

Styrene-butadiene-rubber (SBR) as compared to natural rubber has .
A. poorer tensile strength.
B. poorer resistance to oxidation.
C.greater amount of heat build-up under
heavy loading.
D. all (a), (b) and (c).

A

d

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12
Q

Coefficient of thermal expansion of glass is
decreased by the addition of ____ during its
manufacture.
A. CaO
B. MnO2
C. ZnO
D. FeS

A

c

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13
Q

The catalyst used in the manufacture of DDT (from chloral and chlorobenzene) is
A. dilute H2SO4
B. oleum
C. ultraviolet light
D. none of these

A

b

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14
Q

Epoxy resin
A. is a good adhesive.
B. is an elastomer.
C. cannot be used for surface coatings.
D. is a polyester.

A

a

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15
Q

Which of the following is the most adverse factor challenging the choice of mercury electrolytic cell process for the production of caustic soda?
A. High cost of mercury.
B. High specific gravity of mercury.
C. Non-availability of high purity mercury.
D. Pollution of water stream by mercury.

A

d

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16
Q

Esterification reaction produces
A. aerosol
B. trans fat
C. soap
D. mercaptans

A

c

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17
Q

Wood charcoal is used for decoloration of sugar because it ____ the colored materials.
A. adsorbs
B. oxidizes
C. reduces
D. converts

A

a

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18
Q

Producer gas consists mainly of
A. CO, CO2, N2, H2
B. CO, H2
C. H2, CH4
D. C2H2, CO2, H2

A

a

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19
Q

Neoprene is the trade name of
A. polyurathane
B. phenol formaldehyde
C. polychloroprene
D. styrene-butadiene rubber

A

c

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20
Q

Sulfur addition in soap is done to
A. improve the soap texture.
B. cure pimples & dandruff.
C. fasten lather formation.
D. increase its cleansing action.

A

b

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21
Q

Phosphate rock is a raw material for the manufacture of
A. phosphoric acid
B. phosphorous
C. superphosphates
D. all of the above

A

d

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22
Q

Mineral oils (e.g. petroleum oils) are preferred over fatty oils (e.g. mustard oil, ghee, tallow, palm oil, olive oil etc.) as a lubricant due to its
A. poor oxidation stability and high gum forming tendency.
B. greater tendency of decomposition at elevated temperature.
C. hydrolysis tendency in presence of water.
D. all of the above

A

b

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23
Q

Which of the following is NOT a raw material used for the manufacture of ordinary glass?
A. Iron oxide
B. Soda ash
C. Limestone
D. Silica

A

a

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24
Q

Zeolite removes both temporary as well as permanent hardness of water by precipitating calcium and magnesium present in water as insoluble zeolites. Used zeolite is regenerated by flushing with the solution of
A. calcium sulphate
B. sodium chloride
C. sodium sulphate
D. magnesium chloride

A

b

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25
Q

Pasteurization of milk means
A. removal of fatty and albuminous substance from it.
B.killing of organisms present in it by heating it at controlled temperature without changing its natural characteristics.
C.inhibiting the growth of micro-organisms without killing them.
D. none of these.

A

b

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26
Q

Fusion of bauxite and ____ produces high
alumina cement.
A. alum
B. limestone
C. coke
D. quartz

A

b

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27
Q

________ process is used for the manufacture
of sodium carbonate by ammonia soda process.
A. Ostwald’s
B. Bosch
C. Solvay
D. Haber’s

A

c

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28
Q

Polycaprolactum is commercially known as
A. nylon-6
B. nylon-66
C. dacron
D. rayon

A

a

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29
Q

Frasch process is for
A. making oxygen
B. producing helium
C. mining sulfur
D. making nitrogen

A

c

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30
Q

Pitch (a product of coal tar distillation) is always mixed with creosote oil, when it is to be burnt in a burner, because
A. its calorific value is very less.
B. tar neutralizes the residual acids present in pitch.
C.it reduces viscosity and imparts fluidity for its transportation through pipelines at economic pressure drop.
D. all of the above

A

c

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31
Q

Which is the main reducing agent during
production of iron from iron ore in a blast furnace?
A. C
B. CO
C. CO2
D. H2

A

b

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32
Q

The drug used in contraceptives is
A. sulphadizene
B. mestranol
C. methyl salicylate
D. cholecalciferol

A

b

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33
Q

Raw materials used for producing _ _
cement does not contain iron oxide.
A. waterproof
B. slag
C. white
D. pozzolan

A

c

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34
Q

In the Lurgi coal gasifier
A. coking coals cannot be used.
B. low carbon conversion efficiency is achieved.
C. entrainment of solids is higher.
D. large quantity of coal can be processed.

A

d

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35
Q

Neon gas is
A. flammable in nature.
B. used in color discharge tube.
C. filled in lamps having tungsten filament.
D. all (a), (b) and (c).

A

b

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36
Q

Which of the following is an undesirable dynamic characteristic of an instrument?
A. Reproducibility
B. Dead zone
C. Time lag
D. Static error

A

c

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37
Q

Pick out the one which is a first order instrument.
A.Mercury in glass thermometer (without any
covering or air gap)
B. Bare metallic thermometer
C. Bare vapor pressure thermometer
D. All of the above

A

d

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38
Q

Load cells are used for the measurement of
A. stress
B. weight
C. strain
D. velocity

A

b

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39
Q

Which of the following is the dynamic characteristics of an instrument?
A. Reproducibility
B. Sensitivity
C. Dead zone
D. Fidelity

A

d

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40
Q

The ____ of a vapor pressure thermometer
is a functioning element.
A. pointer
B. bourdon tube
C. bulb
D. none of these

A

a

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41
Q

A negative gain margin expressed in decibels
means a/an ____ system.
A. stable
B. unstable
C. critically damped
D. none of these

A

b

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42
Q

Thermistor has a high temperature coefficient of
resistivity which is used as the sensing element in
resistance thermometer. It is a/an
A. insulator
B. conductor
C. solid semiconductor
D. liquid semiconductor

A

c

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43
Q

Flapper nozzle is used in a/an ____ controller.
A. electronic
B. hydraulic
C. pneumatic
D. none of these

A

c

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44
Q

Working principle of radiation pyrometer is based on
the
A. Wien’s law
B. Kirchoff’s law
C. Stefan-Boltzman law
D. Seebeck effect

A

c

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45
Q

Which of the following relates the emf. generated in
a single homogeneous wire to the temperature
difference?
A. Peltier effect
B. Thomson effect
C. Seebeck effect
D. none of these

A

b

46
Q

Dilute wine was initially used as a thermometric liquid to develop temperature scale. empirical
scale developed The first temperature was the
scale.
A. Kelvin
B. Centigrade
C. Fahrenheit
D. Reaumer

A

c

47
Q

Which of the following is a desirable characteristic
of an instrument?
A. High drift
B. High fidelity
C. High measuring lag
D. Poor reproducibility

A

b

48
Q

The operation of a rotameter is based on
A. variable flow area.
B. rotation of a turbine.
C. pressure drop across a nozzle.
D. pressure at a stagnation point.

A

a

49
Q

The temperature of tempering oil baths maintained
at 400°C during heat treatment of steel is measured
by a/an ____ thermocouple.
A. chromel-alumel
B. iron-constantan
C. platinum-platinum/rhodium
D. none of these

A

b

50
Q

Instrumentation in a plant offers the advantage of
A. greater safety of operation
B. better quality of product
C. greater operation economy
D. all of these

A

d

51
Q

Which of the following temperature measuring
instruments need not touch the object whose
temperature is being measured?
A. Radiation/infrared pyrometer
B. Filled system thermometer
C. Mercury in glass thermometer
D. Thermo-electric pyrometer

A

a

52
Q

Thermal conductivity measurement comprises the
working principle of a
A. CO2 analyzer
B. polarimeter
C. spectrometer
D. chromatograph

A

a

53
Q

Response of a system to a sinusoidal input is called
____ response.
A. impulse
B. unit step
C. frequency
D. none of these

A

c

54
Q

The closed loop pole of a stable second order
system could be
A. both real and positive.
B. complex conjugate with positive real parts.
C. both real and negative.
D. one real positive and the other real negative.

A

c

55
Q

Smoke density of the flue gas going out of the
chimney is measured by a
A. polarograph
B. thermal conductivity meter
C. photo electric cell
D. chromatograph

A

c

56
Q

Temperature measuring
standardized mostly with
pure substances.
A. melting
B. boiling
C. both (A) & (B)
D. neither (A) nor (B)

A

c

57
Q

Pick out the first order system from among the
following.
A. Damped vibrator.
B. Mercury in glass thermometer kept in boiling water.
C. Interacting system of two tanks in series.
D. Non-interacting system of two tanks in series

A

b

58
Q

The maximum service temperature for fibre glass
used as thermocouple wire insulation material is
____ °C.
A. 250
B. 500
C. 750
D. 1000

A

b

59
Q

Which of the following controllers has the least
maximum deviation?
A. P-controller
B. P-I controller
C. P-I-D controller
D. P-D controller

A

d

60
Q

Volumetric expansion is the working principle of the
______ thermometers.
A. mercury in glass
B. constant volume gas
C. vapor pressure
D. bimetallic

A

a

61
Q

Which of the following measurements can be made
by the measurement of emf?
A. pH value
B. Degree of hydrolysis
C. Composition of complex ions
D. All of the above

A

d

62
Q

A magnetic flowmeter is
A. based on the principle of Faraday’s law.
B.capable of measuring the flow rate of slurries and
electrolytes.
C.based on the linear relationship between the fluid
flow rate and the induced voltage.
D. All of the above.

A

d

63
Q

Zirconia probe is used for the continuous
measurement of flue gases going out
of the furnace.
A. oxygen in
B. carbon dioxide in
C. carbon monoxide in
D. temperature of

A

a

64
Q

Strain gage pressure transducers are used to
______ measure pressures.
A. gage as well as vacuum
B. absolute as well as differential
C. both (A) and (B)
D. neither (A) nor (B)

A

c

65
Q

Compositional analysis of ____ is done
using mass spectrometer.
A. an isotope
B. natural gas
C. a solid
D. an alloy

A

a

66
Q

The function of a transducer is to
A. modify the input signal.
B. amplify the input signal.
C.convert the primary signal into a more useful
quantity, usually an electric impulse.
D. codify/decodify the input signal.

A

c

67
Q

Which of the following thermocouples will give the
highest output for the same value of hot and cold
junction temperature?
A. Platinum-platinum + rhodium.
B. Iron-constantan.
C. Chromel-constantan.
D. All will give the same output

A

c

68
Q

_____ is undesirable in thermocouples used
in industries.
A. Linear relation of emf to temperature
B. Corrosion resistance
C. Oxidation resistance
D. Non-linear relation of emf to temperature

A

d

69
Q

Select the correct statement from the following.
A. The frequency response of a pure capacity process is unbounded.
B. The phase lag of a pure time delay system decreases with increasing
frequency.
C. The amplitude ratio of a pure capacity process is inversely proportional
to frequency.
D.The amplitude ratio of a pure time delay system increases with
frequency

A

c

70
Q

Continuous shell temperature measurement in a
liquid-liquid heat exchanger is done by a
A. thermocouple
B. resistance thermometer
C. mercury in glass thermometer
D. vapor pressure thermometer

A

a

71
Q

The _____ of a vapor pressure thermometer
is a secondary element.
A. pointer
B. Bourdon tube
C. bulb
D. none of these

A

b

72
Q

Emf developed by a thermocouple while measuring
a temperature of 600°C is about 5.5 mV. The type of
thermocouple used is
A. chromel-alumel
B. iron-constantan
C. platinum-platinum+rhodium
D. either (A), (B) or (C)

A

c

73
Q

Which of the following relates the absorption &
evolution of heat at the junctions of a thermocouple
to the current flow in the circuit?
A. Seebeck effect
B. Peltier effect
C. Joule heating effect
D. Thomson effect

A

b

74
Q

In a shell and tube heat exchanger, the flow rate of
heating/cooling fluid is the variable.
A. load
B. controlled
C. manipulated
D. none of these

A

c

75
Q

Typical specifications for design stipulates the gain
margin and phase margin to be respectively
A. >1.7 and >30°
B. <1.7 and >30°
C. <1.7 and <30°
D. >1.7 and <30°

A

a

76
Q

The ratio of shear stress to shear strain is called
A. bulk modulus
B. shear modulus
C. modulus of rigidity
D. modulus of elasticity

A

b

77
Q

Which of the following material is seldom used for pressure
vessel construction?
A. Rimmed still
B. Mild steel
C. Killed steel
D. Semi-killed steel

A

a

78
Q

Fresh water carrying pipelines in chemical industries are colored with _____ color.
A. sea green
B. brown
C. yellow
D. red

A

a

79
Q

25% cut segmental baffle means that the baffle
A. height is 75% of the I.D. of the shell.
B. height is 25% of the I.D. of the shell.
C. spacing is 75% of its height.
D. width is 25% of its height.

A

a

80
Q

Liquid/petroleum fuel storage tanks are built underground (as in case of petrol pumps), when the storage capacity is less than kilolitres.
A. 20
B. 30
C. 45
D. 85

A

c

81
Q

Le/D for fully open globe value may be around
A. 10
B. 25
C. 75
D. 300

A

d

82
Q

Lug support is
A. the most suitable for thick vertical vessel.
B. same as bracket support.
C.provided usually for vessels of much smaller height than skirt supported vessels.
D. (a), (b) and (c).

A

d

83
Q

With increase in the number of shell passes, the value of FT
A. increases
B. decreases
C. remains same
D.remains same, only if the number of tube passes does not change.

A

a

84
Q

Holes of a sieve tray are arranged in triangular pitch of ______ times the hole diameter.
A. 1.5 to 2
B. 2.5 to 5
C. 5 to 10
D. 10 to 15

A

b

85
Q

In case of a shell and tube heat exchanger, the minimum shell thickness for carbon steel (inclusive of corrosion allowance) depends on shell diameter and is in the range of ____ mm.
A. 3-5
B. 5-11
C. 8-15
D. 12-18

A

b

86
Q

The stress developed in a material without any permanent set is called the
A. ultimate stress
B. yield stress
C. elastic limit
D. breaking stress

A

c

87
Q

In a shell and tube heat exchanger, the ‘tube pitch’ is defined as the
A. O.D. of the tube for square pitch.
B. shortest distance between two adjacent tube holes.
C. shortest centre to centre distance between adjacent tubes.
D. none of these.

A

c

88
Q

Which of the following is not a valid assumption in continuous binary distillation for calculating the number of equilibrium stages by Mc-Cabe-Thiele’s method ?
A. Sensible heat changes for vapor & liquid are negligibly small.
B. Reflux is not a saturated liquid.
C. Molar latent heat of the two components are equal.
D. Heat of mixing of normal liquid is assumed to be zero.

A

b

89
Q

The value of fouling factor depends upon the
A. characteristic of process fluid.
B. velocity of process fluid containing suspended solids.
C. suspended solids in the fluid.
D. (a), (b) and (c).

A

d

90
Q

In case of bubble cap distillation column of diameter greater than 1.2 m, the cap diameter is roughly about _____ cm.
A. 10
B. 20
C. 30
D. 40

A

a

91
Q

Tube side pressure drop in a 1-2 heat exchanger (for turbulent flow of fluids through the tubes) is about _______ times, that in a 1-1 heat exchanger having the same size & number of tubes and operated at the same liquid flow rate.
A. 2
B. 1/2
C. 4
D. 8

A

d

92
Q

To keep the power input constant for a stirred vessel operating under fully developed turbulent flow conditions (constant power number), if the impeller diameter is increased by 20%, the impeller speed should be decreased by a factor of
A. (1.2)^3/2
B. (1.2)^3/5
C. (1.2)^2/3
D. (1.2)^5/3

A

d

93
Q

In a heat exchanger, shell side fluid velocity can be changed by changing the tube
A. layout
B. pitch
C. both (a) & (b)
D. neither (a) nor (b)

A

c

94
Q

Where does the maximum tensile strength occur in a thick cylindrical vessel subjected to internal pressure?
A. At the inner surface.
B. At the mid thickness of the cylindrical wall.
C. At the outer surface.
D. None of these.

A

a

95
Q

It is not desirable to design a heat exchanger for LMTD correction factor, FT, of less than
A. 0.99
B. 0.95
C. 0.80
D. 0.55

A

c

96
Q

Arivetted joint does not fail by _______ of rivets.
A. 0.99
B. 0.95
C. 0.80
D. 0.55

A

d

97
Q

Triangular pitch tube layout as compared to square pitch in a shell and tube heat exchanger
A. permits the use of less tubes in a given shell diameter.
B.facilitates comparatively easier external cleaning because of large clearance.
C. permits the use of more tubes in a given shell diameter.
D. both (b) and (c).

A

c

98
Q

Bracket supports are the most suitable for supporting
_____________ vessels.
A. thick walled vertical
B. horizontal
C. thin spherical (e.g. Horton sphere)
D. none of these

A

a

99
Q

In a multi-pass shell and tube heat exchanger, the shell side cross flow area does not depend upon
A. baffle spacing
B. clearance
C. pitch
D. none of these

A

d

100
Q

Two iron pipes of the same nominal diameter but different schedule numbers will have the same
A. inside diameter
B. outside diameter
C. wall thickness
D. none of these

A

a

101
Q

Lessing ring is formed by the addition of a partition across the centre of a raschig ring, which results in an area increase of about percent.
A. 5
B. 20
C. 35
D. 55

A

b

102
Q

In chemical process equipment, the conical bottom heads used, usually has an apex angle of
A. 20°
B. 40°
C. 60°
D. 80°

A

c

103
Q

Smaller sized packings are generally dumped to the packed columns, and the large ones of size greater than mm are stacked individually, which provides better control over bed porosity and offers lower gas pressure drop.
A. 25
B. 50
C. 75
D. 150

A

c

104
Q

Correct use of ‘factor of safety’ is very important in equipment design. It is defined as the ratio of the
A. ultimate stress to breaking stress.
B. ultimate stress to working stress.
C. working stress to ultimate stress.
D. none of these.

A

b

105
Q

The operating velocity in the absorption tower is usually 40-50% of the flooding velocity. Packed absorption towers are normally designed for a pressure drop of about mm of water column per meter height of packing.
A. 1-5
B. 20-40
C. 100-150
D. 1000-1500

A

b

106
Q

In perforated plate towers, the
A. hole sizes may be around 1/8” or 3/16”.
B.total hole area may be around 6 to 15% of tower crosssectional area.
C. pressure drop is less compared is similar bubble cap towers.
D. all (a), (b) and (c).

A

d

107
Q

The ends of a cylindrical vessel can be closed by a head, which
can be one of the four shapes. For the same thickness, choose
the one which can withstand the highest pressure.
A. Flat plate
B. Hemispherical
C. Torispherical
D. Ellipsoidal

A

d

108
Q

Wall thickness of schedule 40 pipe as compared to that of schedule 80 pipe is
A. more
B. less
C. same
D. either (a) or (b); depends upon the I.D. of the pipe

A

b

109
Q

Pick out the wrong statement pertaining to the design of a basket type evaporator.
A. It is used for high viscosity liquor having large rate of scaling.
B. The tube bundle is suspended on bracket.
C. There is no central downtake.
D.Downtake is formed by the annular space between the bundle
and the shell.

A

a

110
Q

Speed of the drum of the rotary vacuum filter normally ranges from __________ rpm.
A. 0.1 to 2
B. 5 to 7
C. 3 to 8
D. 8 to 15

A

a

111
Q

Astuffing box is used for
A.absorbing the contraction/expansion of pipeline due to
temperature changes.
B. prevention of fluid leakage around moving parts.
C. facilitating smooth opening and closing of a valve.
D. reducing the resistance of fluid flow.

A

b

CHELE (17 decks)

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