Cementite consist of

A)
13% carbon and 87% ferrite
B)
13% cementite and 87% ferrite
C)
6.67% carbon and 93.33% iron
D)
13% ferrite and 87% cementite

Correct Answer : Option (C) :   6.67% carbon and 93.33% iron

Recently Updated in Engineering Materials Questions
Babbit metal contains
A)
92% tin, 6% copper and 2% antimony
B)
88% tin, 4% copper and 8% antimony
C)
66% tin, 30% copper and 4% antimony
D)
50% tin and 50% antimony

Correct Answer :   88% tin, 4% copper and 8% antimony

What is the result of full annealing of hypoeutectoid steels?
A)
Bainite
B)
Silicon
C)
Cementite
D)
Coarse pearlite

Correct Answer :   Coarse pearlite

Explanation : Hypoeutectoid steels are heated above the A3 line and then cooled in the furnace. Then it removed from the furnace and then cooled at room temperature. This results in coarse pearlite with excess ferrite.

A fine grained steel
A)
is less tough and has a less tendency to distort during heat treatment
B)
is less tough and has a greater tendency to distort during heat treatment
C)
is more ductile and has a less tendency to distort during heat treatment
D)
is more ductile and has a greater tendency to distort during heat treatment

Correct Answer :   is more ductile and has a less tendency to distort during heat treatment

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