Materials and Construction MCQs

479 MCQs  — Chemical Engineering MCQs  (Page 27 of 48)

Attempt Materials and Construction Quiz
The temperature at which new grains are formed in the metal is called the ______________ temperature?
A. Eutectic
B. Recrystallisation
C. Upper critical
D. Lower critical
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The main purpose of galvanising iron sheets is to___________________?
A. Harden the surface
B. Increase its glossiness and lustre
C. Prevent the action of water
D. Prevent the action of oxygen
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Presence of high amount of silicon in cast iron________________?
A. Suppresses the decomposition of fe3c
B. Increases the formation of graphite
C. Increases the contraction of the metal
D. Reduces its fluidity
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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_________________?
A. Dilute hci
B. Acetic acid
C. Concentrated h2so4
D. None of these
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Tin vessels are corroded by____________________?
A. Anhydrous ammonia
B. Aromatic solvents
C. Synthetic detergent solution
D. None of these
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Percentage elongation of a material is a measure of its _______________________?
A. Ductility
B. Brittleness
C. Toughness
D. Malleability
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18/8 steel is a/an __________ stainless steel ?
A. Austenitic
B. Ferritic
C. Martensitic
D. None of these
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Which of the following is a non-magnetic material ?
A. Cobalt
B. Zinc
C. Nickel
D. None of these
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Work hardening of a material ________________?
A. Decreases its tensile strength
B. Decreases its ductility
C. Increases its ductility
D. Does not affect its ductility
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German silver in an alloy of________________?
A. Copper, nickel and zinc
B. Copper, aluminium and silver
C. Silver, zinc and aluminium
D. Silver, nickel and zinc
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Word of the Day
24 Jul
Untenable
(especially of a position or view) not able to be maintained or defended against attack or objection.
ناقابل مدافعت، غیر مستحکم، جو دلیل سے ثابت نہ ہو سکے

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