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Engineering
Mechanical
ME Set-1
Engineering Materials
129

Engineering Materials MCQ with Answers

129) the temperature point at which the change ends on heating the steel is called

lower critical point

upper critical point

point of recalescence

point of decalescence

Answer is:

upper critical point

Engineering Materials MCQ with Answers

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Related 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

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.

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