Materials and Construction MCQs

Question 1

The chlorinator used in the manufacture of DDT is made of

Accepted Answer

Glass lined steel

Answer

Glass

Answer

Teflon

Answer

Bakelite

Question 2

Carbon percentage in medium carbon steel is around

Accepted Answer

0.35 to 0.5

Answer

0.1 to 0.35

Answer

0.8 to 1.4

Answer

1 to 1. 5

Question 3

Addition of nickel to copper improves its

Accepted Answer

Hardness

Answer

Machinability

Answer

Ductility

Answer

Strength

Question 4

Gunmetal and bronze are not corroded by the action of

Accepted Answer

Synthetic detergent solution

Answer

Wet chlorine

Answer

Hydrochloric acid (10%)

Answer

Nitric acid (< 25%)

Question 5

Glass lined vessels are not used for handling/storing

Accepted Answer

Hydroflouric acid

Answer

Dilute H 2 SO 4

Answer

Dilute HNO 3

Answer

Dilute HCl

Question 6

For handling sulphuric acid of 95% strength, the suitable material of construction for pipes is

Accepted Answer

Cast iron

Answer

Stainless steel

Answer

Aluminium

Answer

Nickel

Question 7

Percentage of silver in German silver is

Accepted Answer

0

Answer

5

Answer

10

Answer

20

Question 8

Sulphuric acid pickling tanks are lined with

Accepted Answer

Rubber

Answer

Nickel

Answer

Aluminium

Answer

Glass

Question 9

__________ iron is produced, when molten pig iron is chilled suddenly.

Accepted Answer

White cast

Answer

Grey cast

Answer

Wrought

Answer

None of these