Heat Treatment MCQ - Machinist(Set-1) with Answers

Heat Treatment MCQ - Machinist(Set-1) with Answers

36) Which one of the following heat treatment processes produces a scale-free surface on the component ?

Answer is:

Induction hardening

37) In heat treatment process annealing is done to

Answer is:

increase the softness

38) After hardening process, the metal becomes more hardened and also will become more

Answer is:

Brittle

39) For case hardening the first stage is carburizing. By carburizing it is meant ?

Answer is:

Increasing the percentage of carbon on the surface

For case hardening the first stage is carburizing. By carburizing it is meant ?

40) For annealing hypoeutectoid steel according to the carbon content, it should be heated to

Answer is:

30 Degree Centigrade to 50 Degree Centigrade above the upper critical point