In a face centred cubic space lattice, there are_________.

Mechanical Engineering : Engineering Materials - Quiz(MCQ)

hexagonal faces and three atoms are symmetrically arranged in the body of the cell

fourteen atoms out of which eight atoms are located at the corners of the cube and six atoms at the centres of six faces

nine atoms out of which eight atoms are located at the corners of the cube and one atom at its centre

seventeen atoms out of which twelve atoms are located at the twelve corners of the hexagonal prism, one atom at the centre of each of the two

Correct Answer : Option (B) : fourteen atoms out of which eight atoms are located at the corners of the cube and six atoms at the centres of six faces

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