chemical engineering MCQs – Page 355

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 Review each marked answer and report any item that may be outdated or unclear.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
7081. Iron rust is_________________?
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A. Ferric sulphide

B. Hydrated ferric oxide

C. Ferrous oxide

D. Powdered iron

7082. A steel alloy containing 36% nickel is called _____________________, which has a zero co-efficient of expansion?
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A. Austenitic stainless steel

B. Invar

C. High speed steel

D. Heat resisting steel

7083. Dilute sulphuric acid is transported in _____________ pipes?
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A. Mild steel

B. Copper

C. Lead

D. Special alloys

7084. A measure of toughness of a material is its________________?
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A. Ultimate strength

B. Percentage elongation

C. Area under stress-strain diagram

D. Yield strength
7085. Metal at the top of the electromotive series is________________?
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A. Most stable

B. Most noble

C. Most active

D. Least active

7086. Fatigue failure of a material results from ______________ stress?
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A. None of these

B. Fluctuating

C. Tensile

D. Compressive

7087. For storing water and acid free benzol, use a ______________ vessel?
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A. Stainless steel

B. Steel

C. None of these

D. Karbate

7088. The main purpose of galvanising iron sheets is to___________________?
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A. Increase its glossiness and lustre

B. Harden the surface

C. Prevent the action of oxygen

D. Prevent the action of water
7089. The behaviour of visco-elastic material is time dependent. This behaviour is common in _____________ materials?
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A. Non-crystalline organic polymeric

B. Crystalline

C. Non-crystalline solid

D. Rubbery

7090. Mercury is transported in metal containers made of________________?
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A. Iron

B. Lead

C. Aluminium

D. Nickel

7091. Which one contains the least percentage of carbon ?
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A. Wrought iron

B. High speed steel

C. Pig iron

D. Cast iron

7092. Rubber lined vessels are corroded by the action of__________________?
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A. Chloroform

B. All A., B. and C.

C. Sulphuric acid (95%)

D. Aqua regia

7093. Nickel and molybdenum are the basic constituents of___________________?
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A. Hastelloy

B. Solder

C. Inconel

D. German silver

7094. Silicon percentage in acid resistant cast iron is about________________?
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A. 14

B. 4

C. 8

D. 20

7095. Lead pipes are not safe for carrying drinking water because water containing dissolved oxygen attacks lead thereby forming poisonous Pb (OH)2. Lead pipes are readily corroded by_________________?
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A. Concentrated H2SO4

B. Dilute HCI

C. None of these

D. Acetic acid
7096. Generally _____________ are subjected to galvanising (i.e., zinc coating)?
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A. Non-metals

B. Non-ferrous metals

C. Stainless steel

D. Low carbon steels
7097. Plate and frame filter press is usually made of__________________?
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A. Cast iron

B. Stainless steel

C. Mild steel

D. Galvanised iron

7098. Polythene (low or high density) containers are not corroded by___________________?
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A. Nitric acid (95%) at room temperature

B. Sulphuric acid (10%) at room temperature

C. Sulphur trioxide at 60C

D. Any of these

7099. Constantan is an alloy of____________________?
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A. Cu (55%) & Sn (45%)

B. Pt (95%) & Rh (10%)

C. Fe (80%) & Ni (20%)

D. Cu (55%) & Ni (45%)
7100. Invar used in thermocouples is an alloy of nickel and________________?
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A. Chromium

B. Copper

C. Iron

D. Lead