Materials and Construction MCQs

Question 1

Presence of high amount of silicon in cast iron

Accepted Answer

Increases the formation of graphite

Answer

Suppresses the decomposition of Fe 3 C

Answer

Increases the contraction of the metal

Answer

Reduces its fluidity

Question 2

18/8 steel is a/an __________ stainless steel.

Accepted Answer

Austenitic

Answer

Ferritic

Answer

Martensitic

Answer

None of these

Question 3

German silver is an alloy of copper, nickel and

Accepted Answer

Zinc

Answer

Silver

Answer

Tin

Answer

Lead

Question 4

Valves in pipe size of 2" and under are normally made of

Accepted Answer

Brass

Answer

Wrought iron

Answer

Bronze

Answer

Monel

Question 5

Wrought iron is a suitable material of construction for handling __________ solutions.

Accepted Answer

Alkalis & alkaline

Answer

Dilute acidic

Answer

Concentrated acidic

Answer

None of these

Question 6

The preferred material of construction for storage tanks for 98% sulphuric acid is

Accepted Answer

Lead

Answer

Aluminium

Answer

Stainless steel 316

Answer

Mild steel

Question 7

Dilute sulphuric acid is transported in __________ pipes.

Accepted Answer

Lead

Answer

Mild steel

Answer

Copper

Answer

Special alloys

Question 8

Silicone rubber is not resistant to the corrosive action of

Accepted Answer

Both B and C

Answer

Sulphuric acid (10%)

Answer

Sulphuric acid (95%)

Answer

Ether

Question 9

With increase in carbide/graphite ratio in cast iron, its

Accepted Answer

Both A & B

Answer

Hardness & brittleness increases

Answer

Ductility decreases

Answer

Neither A nor B