Free carbon in iron makes the metal - Engineering Materials Quiz

Mechanical Engineering : Engineering Materials - Quiz(MCQ)

Free carbon in iron makes the metal

soft and gives a coarse grained crystalline structure

hard and gives a fine grained crystalline structure

soft and gives a fine grained crystalline structure

hard and gives a coarse grained crystalline structure

Correct Answer : Option (A) : soft and gives a coarse grained crystalline structure

Recently Updated in Engineering Materials Questions

Babbit metal contains

92% tin, 6% copper and 2% antimony

88% tin, 4% copper and 8% antimony

66% tin, 30% copper and 4% antimony

50% tin and 50% antimony

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

What is the result of full annealing of hypoeutectoid steels?

Bainite

Silicon

Cementite

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

is less tough and has a less tendency to distort during heat treatment

is less tough and has a greater tendency to distort during heat treatment

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

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

Mechanical Engineering MCQ's

Theory of Machines

Engineering Mechanics

Machine Design

Strength of Materials

Engineering Materials

Automobile Engineering

Steam Boilers and Engines