chemical engineering MCQs – Page 356

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 Review each marked answer and report any item that may be outdated or unclear.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

7101. Chlorination of benzene is done to produce benzene hexachloride (a pesticide) in a photochemical reactor lined with_____________________?
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A. Fireclay bricks

B. Karbate

C. PVC

D. Lead or glass

7102. Spray dryer for evaporating milk to produce milk powder is made of_________________?
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A. Cast iron

B. Aluminium

C. Lead lined steel

D. Stainless steel

7103. Presence of even 0.005% of _____________ in copper makes it highly brittle, rendering it useless for wire-drawing?
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A. Bismuth

B. Arsenic

C. Antimony

D. Oxygen

7104. In the Kraft (sulphate) process for the paper manufacture, the digestor is made of________________?
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A. Cast iron

B. Stainless steel

C. Karbate carbon

D. Wrought iron

7105. Valves in pipe size of 2? and under are normally made of_______________________?
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A. Bronze

B. Wrought iron

C. Monel

D. Brass

7106. 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.

7107. Brinell Hardness Number (BHN) for talc is approximately in the range of____________________?
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A. 200 250

B. 100 -150

C. 5-Jan

D. 20-30

7108. The material used in the filament of electric bulbs is_________________?
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A. German silver

B. Tungsten

C. Nichrome

D. Constantan

7109. _______________ does not contain tin as an alloying material?
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A. Pewter

B. Brass

C. Solder

D. Babbitt metal

7110. Caustic soda can be stored in _____________ drums?
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A. Steel

B. Brass

C. Cast iron

D. Gun metal

7111. Teflon (PTFE) is corroded by_______________?
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A. Hydrochloric acid (95%)

B. Sulphuric acid

C. None of these

D. Hydrochloric acid (10%)

7112. 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

7113. Which of the following is not used as the ceramic material in cermets??
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A. Nitrides

B. Carbides

C. Oxides

D. Silicides

7114. Which of the following is the lightest of engineering metals ?
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A. Aluminium

B. Titanium

C. Magnesium

D. Tin

7115. An alloy used as thermocouple material comprises of 40% nickel and 60% copper. It is called____________________?
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A. Kanthal

B. Constantan

C. German silver

D. Chromel

7116. To improve the machinability of steel, it is generally subjected to_______________?
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A. Tempering

B. Annealing

C. Normalising

D. Spheroidising

7117. Acetaldehyde is shipped in ____________ drums?
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A. Aluminium

B. Cast iron

C. Either B. & C.

D. Steel

7118. Which of the following is a non-magnetic material ?
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A. Cobalt

B. Zinc

C. None of these

D. Nickel

7119. Chromel (Nichrome) is an alloy of_____________________?
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A. Chromium and molybdenum

B. Molybdenum and nickel

C. Nickel and chromium

D. Chromium and aluminium

7120. Hardest material so far found is__________________?
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A. Pumice stone

B. Diamond

C. Graphite

D. Carborundum

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