MCQs of Heat Treatment of Steel (Material Science And Metallurgy - 3131904)

Showing 11 to 20 out of 40 Questions

11.

While normalizing the steel should be cooled

(a)	In still air to room temperature
(b)	In oil
(c)	By forced air
(d)	In water

12.

A given component cracked after heat treatment. What can be the possible reason ?

(a)	It was heated for long time
(b)	It was not properly cleaned before heating
(c)	It was suddenly cooled in brine
(d)	It was slowly cooled in air

13.

After heating up to required hardening temperature, why must tool steels be quenched ?

(a)	To induce internal stresses
(b)	To build up hardening structure
(c)	To fall off the scale
(d)	To retain it to its original structure

14.

Case Hardening is a method of producing hard skin on the surface of

15.

The external surface of the part made of mild steel can be hardened by

16.

The process of producing a component with tough and ductile core and a hard outer surface is known as

17.

Cyaniding' and 'Nitriding' are two methods of

18.

The external surface of the part made of mild steel can be hardened by

19.

Which one of the following processes is used for hardening the surface of tool steel ?

20.

Which one of the following structures of steel is obtained due to the drastic cooling from the austenite structure ?

Showing 11 to 20 out of 40 Questions