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Mechanical
ME Set-1
Engineering Materials
130

Engineering Materials MCQ with Answers

130) For a steel containing 0.8 percent carbon

there is no critical point

there is only one critical point

there are two critical points

there can be any number of critical points

Answer is:

there is only one critical point

Engineering Materials MCQ with Answers

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Related Engineering Materials MCQ with Answers

131) the essential constituent of a hardened steel is

pearlite

austenite

martensite

troostite

Answer is:

martensite

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

eutectoid steel

hypo-eutectoid steel

hyper-eutectoid steel

none of these

Answer is:

eutectoid steel

133) An eutectoid steel consists of

wholly pearlite

wholly austenite

pearlite and ferrite

pearlite and cementite

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?

Ferrite and pearlite

Cementite and pearlite

Ferrite and bainite

Cementite and martensite

Answer is:

Cementite and pearlite

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