Engineering Materials MCQs

Question 1

Corundum contains more than 95%

Accepted Answer

Al2O3

Answer

Steel

Answer

SiO2

Answer

MgO

Question 2

For a steel containing 0.8% carbon

Accepted Answer

There is only one critical point

Answer

There is no critical point

Answer

There are two critical points

Answer

There can be any number of critical points

Question 3

Age hardening is related to

Accepted Answer

Duralumin

Answer

Brass

Answer

Copper

Answer

Silver

Question 4

Inconel contains

Accepted Answer

80% nickel, 14% chromium and 6% iron

Answer

65% nickel, 15% chromium and 20% iron

Answer

68% nickel, 29% copper and 3% other constituents

Answer

80% nickel and 20% chromium

Question 5

The presence of sulphur in pig iron makes

Accepted Answer

It brittle

Answer

It easily machinable

Answer

It hard

Answer

The casting unsound

Question 6

There are fourteen atoms in a unit cell of

Accepted Answer

Face centered cubic space lattice

Answer

Body centered cubic space lattice

Answer

Close packed hexagonal space lattice

Answer

None of these

Question 7

Which is false statement about properties of aluminium?

Accepted Answer

Wear resistance is very good

Answer

Modulus of elasticity is fairly low

Answer

Fatigue strength is not high

Answer

Creep strength limits its use to fairly low temperatures

Question 8

Cartridge brass can be

Accepted Answer

Any one of these

Answer

Cold rolled into sheets

Answer

Drawn into wires

Answer

Formed into tube

Question 9

Isotropic materials are those which have the same

Accepted Answer

Elastic properties in all directions

Answer

Stresses induced in all directions

Answer

Thermal properties in all directions

Answer

Electric and magnetic properties in all directions