Q.1.

Presence of manganese in alloy steel improves its

Q.2.

Which metal is protected by the layer of its own oxide ?

Q.3.

Brass is an alloy of

Q.4.

__________ possesses viscoelastic properties.

Q.5.

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

Q.6.

Steel rods are used in reinforced concrete to increase its __________ strength.

Q.7.

Which of the following alloy steels is the most suitable for making gun barrels and projectiles ?

Q.8.

The process of heating the cold pressed metallic powder is called __________ in powder metallurgy.

Q.9.

In order to be called steel, an alloy should have iron percentage greater than

Q.10.

Which of the following undergoes granular fracture ?

Q.11.

Presence of even 0.of __________ in copper makes it highly brittle, rendering it useless for wire-drawing.

Q.12.

Sulphuric acid is mixed with ground phosphate rock (to produce phosphoric acid) in a steel digestor lined with

Q.13.

Corrosion involves exchange of electrons in __________ corrosion.

Q.14.

Sulphuric acid pickling tanks are lined with

Q.15.

Nickel is a constituent of