1000+ Materials of Construction Objective Questions & Answers Pdf - 1
Question: 1
Spray dryer for evaporating milk to produce milk powder is made of
(A) cast iron
(B) aluminium
(C) lead lined steel
(D) stainless steel
Ans: D
stainless steel
Question: 2
German silver is an alloy of
(A) silver, nickel and zinc
(B) silver, zinc and aluminium
(C) copper, aluminium and silver
(D) copper, nickel and zinc
Ans: D
copper, nickel and zinc
Question: 3
Duralumin is an alloy of
(A) aluminium and nickel
(B) aluminium, nickel and silicon
(C) aluminium, copper and manganese
(D) none of these
Ans: C
aluminium, copper and manganese
Question: 4
Which metal is protected by the layer of its own oxide?
(A) aluminium
(B) calcium
(C) silver
(D) iron
Ans: A
aluminium
Question: 5
Mercury is transported in metal containers made of
(A) copper
(B) lead
(C) aluminium
(D) iron
Ans: D
iron
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