Engineering Materials MCQs

Question 1

Super conduction by metals is observed in the temperature range of

Accepted Answer

Below 10°K

Answer

Above 100°K

Answer

Around 0°C

Answer

Around 100°C

Question 2

Ferromagnetic alpha iron exists in temperature range of

Accepted Answer

Below 723°C

Answer

770 to 910°C

Answer

910 to 1440°C

Answer

1400 to 1539°C

Question 3

Gamma iron exits at following temperature

Accepted Answer

Between 910°C and 1400°C

Answer

Room temperature

Answer

Near melting point

Answer

Between 1400°C and 1539°C

Question 4

Dow metal contains

Accepted Answer

90% magnesium and 9% aluminium with some copper

Answer

94% aluminium, 4% copper and 0.5% Mn, Mg, Si and Fe

Answer

92.5% aluminium and, 4% copper, 2% nickel and 1.5% Mg

Answer

90% aluminium and 90% copper

Question 5

The material in which the atoms are arranged regularly in some directions but not in others, is called

Accepted Answer

Mesomorphous material

Answer

Amorphous material

Answer

Crystalline material

Answer

None of these

Question 6

The property of a material due to which it breaks with little permanent distortion, is called

Accepted Answer

Brittleness

Answer

Ductility

Answer

Malleability

Answer

Plasticity

Question 7

Which of the following is an amorphous material?

Accepted Answer

Glass

Answer

Mica

Answer

Silver

Answer

Lead

Question 8

Which of the following is used for bearing liner?

Accepted Answer

Babbitt metal

Answer

Gun metal

Answer

Bronze

Answer

Bell metal

Question 9

White cast iron contains carbon in the form of

Accepted Answer

Cementite

Answer

Free carbon

Answer

Graphite

Answer

White carbon