chemical engineering materials and construction MCQs – Page 6

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 Review each marked answer and report any item that may be outdated or unclear.

chemical engineering materials and construction Mcqs
101. The phenomenon in which slow extension of material takes place with the time at constant load is called________________?
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A. Plasticity

B. Ductility

C. Elasticity

D. Creep
102. The carbonating tower used in Solvay process of soda ash manufacture is made of_________________?
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A. Lead lined steel

B. Cast iron

C. Karbate

D. Stainless steel

103. Hardest material so far found is__________________?
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A. Graphite

B. Diamond

C. Pumice stone

D. Carborundum

104. Galvanised iron is___________________?
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A. None of these

B. Protected from rusting

C. Alumina coated iron

D. Harder

105. With increase in carbide/graphite ratio in cast iron, its__________________?
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A. Hardness & brittleness increases

B. Ductility decreases

C. Both A. and B.

D. Neither A. nor B.

106. For platinum thermocouples, lead wires are made of___________________?
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A. Copper & iron

B. Copper & copper-nickel alloys

C. Iron & nickel

D. Tin & nickel

107. Light weight metallic alloy used in aircraft industry is________________?
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A. Phosphor bronze

B. Duralumin

C. High silicon (14%) iron

D. Aluminium

108. Sherardizing process is used for__________________?
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A. Surface coating

B. None of these

C. Cold working on metals

D. Heat treatment of high speed steel

109. Alpha iron is stable ______________ C?
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A. Above 1800

B. Upto 910

C. Above 1403

D. Between 910 & 1403

110. Iron rust is_________________?
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A. Ferrous oxide

B. Ferric sulphide

C. Powdered iron

D. Hydrated ferric oxide
111. ____________ alloys have the highest specific strength of all the structural materials out of the following?
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A. Titanium

B. Magnetic steel

C. Magnesium

D. Chromium

112. _____________ is used for examining the macro-structure of a material?
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A. Metallurgical microscope

B. Optical microscope

C. Visual inspection by naked eye

D. X-rays

113. Nitriding of steel is done (in electric furnace) at _____________ C?
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A. 2210

B. 1720

C. 510

D. 910

114. Carbon is present in the uncombined (graphitic) form in case of__________________?
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A. Steel

B. Cast iron

C. Ferroalloy

D. None of these

115. Thermosetting resins are those polymers, which__________________?
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A. Allow slip to occur between molecules

B. Do not increase in plasticity with rise in temperature

C. Do not take on a permanent set

D. None of these

116. Brinell Hardness Number (BHN) for talc is approximately in the range of____________________?
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A. 100 -150

B. 5-Jan

C. 20-30

D. 200 250

117. Which of the following is a non-magnetic material ?
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A. None of these

B. Zinc

C. Nickel

D. Cobalt

118. Materials having _____________ lattice structure are usually most ductile?
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A. FCC

B. HCP

C. Cubic

D. BCC

119. Most suitable material for high pressure vessel operating at 500 atm. and 500 C is__________________?
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A. Mild steel

B. Molybdenum stainless steel

C. High silicon iron (14% Si)

D. 18/8 stainless steel

120. Presence of 0.3 to 0.5% arsenic in copper increases its____________________?
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A. Ductility

B. Tenacity & hardness

C. Malleability

D. Electrical conductivity