Engineering Materials MCQs

Question 1

Gamma-iron occurs between the temperature ranges of

Accepted Answer

900°C to 1400°C

Answer

400°C to 600°C

Answer

600°C to 900°C

Answer

1400°C to 1530°C

Question 2

Delta-iron occurs between the temperature ranges of

Accepted Answer

1400°C to 1530°C

Answer

400°C to 600°C

Answer

600°C to 900°C

Answer

900°C to 1400°C

Question 3

The blade of a power saw is made of

Accepted Answer

High speed steel

Answer

Boron steel

Answer

Stainless steel

Answer

Malleable cast iron

Question 4

German silver is an alloy of

Accepted Answer

Nickel, Copper and zinc

Answer

Silver and some impurities

Answer

Refined silver

Answer

Nickel and copper

Question 5

Specify the sequence correctly

Accepted Answer

Stress relief, recrystallization, grain growth

Answer

Grain growth, recrystallization, stress relief

Answer

Stress relief, grain growth, recrystallization

Answer

Grain growth, stress relief, recrystallization

Question 6

Cementite consist of

Accepted Answer

6.67% carbon and 93.33% iron

Answer

13% carbon and 87% ferrite

Answer

13% cementite and 87% ferrite

Answer

13% ferrite and 87% cementite

Question 7

Preheating is essential in welding

Accepted Answer

Cast iron

Answer

High speed steel

Answer

All nonferrous materials

Answer

All of the above

Question 8

Which of the following material has nearly zero coefficient of expansion?

Accepted Answer

Invar

Answer

Stainless steel

Answer

High speed steel

Answer

Heat resisting steel

Question 9

When filing or machining cast iron makes our hands black, then it shows that ________ is present in cast iron.

Accepted Answer

Free graphite

Answer

Cementite

Answer

Both A and B

Answer

None of these