Materials and Construction MCQs

Question 1

Which of the following is not an alloy of copper?

Accepted Answer

Pewter metal

Answer

Muntz metal

Answer

Admirability gun metal

Answer

German silver

Question 2

Softness of silver can be converted into hardness by alloying it with small quantity of

Accepted Answer

Copper & nickel

Answer

Zinc

Answer

Aluminium

Answer

Tin

Question 3

Tempering of steel is done to make it

Accepted Answer

Soft

Answer

Brittle

Answer

Hard

Answer

Rollable

Question 4

Galvanising (i.e., zinc coating) of steel sheets is done to

Accepted Answer

Both A & B

Answer

Prevent its rusting by contact with corrosive atmosphere

Answer

Protect the base metal by cathodic protection

Answer

Neither A nor B

Question 5

Nickel is a constituent of

Accepted Answer

Monel metal

Answer

Bronze

Answer

Solder

Answer

Duralumin

Question 6

Stainless steel is not corroded by

Accepted Answer

Nitric acid (10%)

Answer

Hydrochloric acid (10%)

Answer

Sulphuric acid (10%)

Answer

Saturated brine

Question 7

Which of the following stainless steels is non-magnetic?

Accepted Answer

Austenitic

Answer

Ferritic

Answer

Martensitic

Answer

None of these

Question 8

In a plate type heat exchanger, heat transfer plates are never made of

Accepted Answer

Cast iron

Answer

Stainless steel

Answer

Titanium

Answer

Hastealloy C

Question 9

Platinum and silver are corroded by

Accepted Answer

None of these

Answer

Caustic soda solution

Answer

Phosphoric acid

Answer

Sulphuric acid (10%)