chemical engineering chemical engineering basics MCQs – Page 5

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 Review each marked answer and report any item that may be outdated or unclear.

chemical engineering chemical engineering basics Mcqs

81. Steel is welded using the ________________ flame ?
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A. Oxidising

B. Carburising

C. All A, B. & C

D. Neutral

82. The lightest non-inflammable gas is_________________?
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A. H2

B. He

C. Ar

D. O2

83. With increase in annealing temperature, the following defect density decreases?
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A. Vacancy

B. All of these

C. Dislocation

D. Grain boundary

84. Biological shield in a nuclear reactor is generally provided to protect against the__________________?
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A. Electrons

B. Gamma rays & neutrons

C. ?-rays

D. ?-rays

85. _______________ test determines the yield strength, Youngs modulus of elasticity, percentage reduction in area & percentage elongation of a material ?
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A. Fatigue

B. Impact

C. None of these

D. Tensile

86. Which of the following varies as the square root of oil pressure during atomisation of fuel oil through a pressure jet burner ?
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A. Output & fineness

B. Velocity

C. Both A. & B.

D. None of these

87. With increase in compression ratio, the volumetric efficiency of air compressor____________________?
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A. May increase or decrease (depends on the suction pressure)

B. Remain same

C. Increases

D. Decreases

88. The most detrimental impurity in high pressure boiler feed water is ___________________?
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A. Suspended salt

B. Turbidity

C. Dissolved salt

D. Silica

89. Maximum hardenability of steel depends upon its_______________________?
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A. Alloying elements content

B. Chemical composition

C. Grain size

D. Carbon content

90. Heating of ferromagnetic materials to a temperature above Curie temperature makes it ________________________?
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A. Superconductor

B. Ferritic

C. Insulator for heat & electricity transmission

D. Behave like paramagnetic materials

91. The dimensional formula of bulk modulus of elasticity is same as that of the ____________________?
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A. Force

B. Pressure

C. Density

D. None of these

92. Stresses encountered in the metal forming processes are less than the _____________ of the material?
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A. Limit of proportionality

B. Fracture strength

C. Yield strength

D. Elastic limit

93. Large diameter reinforced cement concrete (RCC) pipes are generally joined by ____________________ joint ?
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A. Flanged iron

B. Collar

C. Flexible

D. Expansion

94. Which of the following is a commonly used manometric liquid for low pressure range ?
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A. Ethylene glycol

B. Carbon tetrachloride

C. Glycerol

D. Ethyl alcohol

95. Carbide tipped cutting tools are manufactured by powder metallurgy techniques and have a composition of_____________________?
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A. 90% tungsten carbide and 10% cobalt

B. 30% nickel, 15% chromium & 55% tungsten

C. 65% tungsten & 35% zirconium

D. 70% aluminium oxide & 30% silica

96. ________________ is a special constituent of chlorophyll without which photosynthesis is not possible ?
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A. Hydrogen

B. Phosphorous

C. Nitrogen

D. Calcium

97. The rolling process cannot be used to produce______________________?
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A. Rods

B. Plates

C. Tubes

D. Wires

98. The softness or hardness of a grinding wheel depends upon the type & amount of bonding material used. For general purpose cutter grinding _______________ grinding wheel is normally used ?
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A. Aluminium oxide

B. Hard

C. Silicon carbide

D. Soft

99. In multipass welds, shot peening is done after each pass to__________________?
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A. Close the surface porosity

B. Break the continuity of columnar grains

C. Introduce texture in the weld

D. Flatten the weldment

100. A common disinfectant used in village wells for disinfection of water is __________________?
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A. Iodine

B. Bromine

C. Potassium permanganate

D. Free chlorine

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