Engineering Materials MCQ with Answers

Engineering Materials MCQ with Answers

131) the essential constituent of a hardened steel is

Answer is:

martensite

132) A steel with 0.8 percent carbon and 100 percent pearlite is called

Answer is:

eutectoid steel

133) An eutectoid steel consists of

Answer is:

wholly pearlite

Explanation:

The steels which contains less than 0.8% carbon are known as hypo eutectoid steels. It consists of pearlite and proeutectoid ferrite.

134) which one of the following sets of constituents is expected in equilibrium cooling of a hyper eutectoid steel from austenitic state?

Answer is:

Cementite and pearlite

135) When a steel containing less than 0.8 percent carbon is cooled slowly from temperatures above or within the critical range, it consists of

Answer is:

ferrite and pearlite

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