Heat Treatment Quiz

What is one of the purposes of heat treatment?

• To change the color of steel

• To alter mechanical properties like hardness

• To make steel magnetic

• To reduce the weight of steel

Which of the following is NOT a mechanical property altered by heat treatment?

• Hardness

• Ductility

• Color

• Strength

Heat treatment is used to alter which of the following properties?

• Electrical conductivity

• Hardness

• Transparency

• Magnetism

What does heat treatment NOT affect in steel?

• Hardness

• Ductility

• Strength

• Color

In what conditions is steel heated and cooled during heat treatment?

• Random conditions

• Controlled conditions

• Extreme conditions

• Natural conditions

What is altered in steel to improve its toughness?

• Color

• Mechanical properties

• Electrical properties

• Chemical composition

Which of the following is a result of heat treatment?

• Increased color variety

• Altered mechanical properties

• Reduced material cost

• Enhanced electrical conductivity

At what temperature is steel heated during Sub-Critical Annealing?

• Above 727°C

• Below 727°C

• Exactly 727°C

• At room temperature

What happens to steel after it is heated in Sub-Critical Annealing?

• It is rapidly cooled in water.

• It is cooled slowly in the furnace.

• It is left to cool in air.

• It is immediately used for machining.

How long is the steel held at the sub-critical temperature during annealing?

• It is not held at all.

• Held for a short time.

• Held for some time.

• Held indefinitely.