chemical engineering MCQs – Page 5

Practise multiple-choice questions from chemical engineering for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

chemical engineering Mcqs
81. In chemical dehumidification process___________________?
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A. Dry bulb temperature remains constant

B. Wet bulb temperature increases

C. Dry bulb temperature increases

D. Dew point temperature increases

82. The most commonly used moderator in nuclear power plants is__________________?
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A. Heavy water

B. Beryllium

C. Light water

D. Graphite
83. Property responsible for the talcum powder to cling to the skin is the__________________?
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A. Capillary action

B. Surface tension

C. Adhesion

D. Cohesion

84. Which of the following is used to produce draught in the locomotive boilers ?
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A. Chimney

B. Forced draught fan

C. Steam jet arrangement

D. Induced draught fan

85. Silicon percentage in silicon steel used for electrical equipments is about______________?
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A. 4.0

B. 1

C. 8

D. 14

86. Which of the following phenomenon will exhibit the minimum heat transfer ?
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A. Free convection in air

B. Forced convection in air

C. Boiling

D. Conduction in air
87. Cryogenics is concerned with the generation & use of low temperature in the range of____________________?
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A. 0C to 123C

B. 0K to 123K

C. 0C to 273C

D. 0K to 273K

88. Corrosion is____________________?
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A. A physical phenomenon

B. Same as erosion

C. A chemical phenomenon

D. An uncontrollable phenomenon

89. Corona discharge is related to the operation of a/an_______________________?
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A. Fast breeder reactor

B. Electrostatic precipitator

C. Induction motor

D. Magneto hydrodynamic generator (MHD)

90. A gas which is collected over water becomes moistened due to water vapor, exerts its own partial pressure at the gas temperature, which is termed as its_______________?
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A. Vapor pressure

B. Saturated humidity

C. Aqueous tension

D. Absolute humidity

91. A dummy activity is used in PERT network to describe the_____________________?
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A. Precedence relationship

B. Necessary time delay

C. Resource idleness

D. Resource restriction

92. Magnetic permeability of iron is increased by its_____________________?
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A. Alloying with cobalt

B. Purification

C. Alternate heating & cooling

D. Decarburising

93. Dryness factor of steam is defined as the ratio of the mass of vapor in the mixture to the mass of the mixture. Dryness factor of steam is measured by a _______________ calorimeter ?
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A. Bomb

B. Boys

C. Junkers

D. Throttling
94. In fluid flow, and heat and mass transfer, one encounters (i) kinematic velocity (?), (ii) molecular diffusivity (?) and thermal diffusivity (?). The units of these quantities are ?
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A. ? , ? and ? all have units of m2/s

B. ? , ? and ? all have units of m/s

C. ? and ? have units of m/s, while ? has unit of m2/s

D. ? and ? have units of m2/s, while ? has unit of m/s
95. Gratings is associated with the measurement of____________________?
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A. Surface texture

B. Flatness

C. Linear displacement

D. Concavity/convexity

96. Amortization in respect of financial obligation of a company means the_____________________?
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A. Liquidation of financial obligations on instalment basis

B. Modernisation of the plant equipments

C. Liquidation of all the obsolete equipments of the company

D. Commitment of financial obligation on priority

97. ______________________ is used as a material of construction for the blade of power saw ?
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A. High speed steel

B. Wrought iron

C. Mild steel

D. Stainless steel

98. The noble metals________________?
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A. Are the lowermost in the electro-chemical series of metals

B. Do not resist corrosion very strongly

C. Are exemplified by Na, K and Li

D. None of these

99. Which of the following hardness tests does not measure the indentation hardness of metals and alloys ?
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A. Brinell hardness test

B. Vickers hardness test

C. Shore scleroscope test

D. Rockwell hardness test

100. The process of removal of scale formed during hot rolling of steel is termed as_________________?
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A. Skimming

B. Descaling

C. Shot blasting

D. Pickling