Engineering Materials

Which of the following factors does not influence the variety and quality of metal?

• Rate of heating and cooling

• Quenching medium

• Grain size

• Furnace

How does the rate of cooling affect the hardness of the metal?

• Slow cooling, hard material

• Slow cooking, soft material

• Rapid cooling, soft material

• No effective change

Which of the following is not a stage of annealing?

• Heating

• Soaking

• Tempering

• Quenching

Full annealing is applied to which kind of materials?

• Steel castings

• Steel wires

• High carbon steels

• Sheet products

For full annealing of hypoeutectoid steels, they are heated in a range above __________

• 153-250 C

• 273-350 C

• 551-770 C

• 723-910 C

Which among the following is not applicable to process annealing of steels?

• Low scaling

• Rapid

• Expensive

• Single phase morphology

What happens when internal residual stresses are not removed?

• Coarse structure

• Reduction of grain size

• Distortion

• Recrystallization

Process annealing is applied to which kind of materials?

• Steel castings

• Low carbon steels

• High carbon steels

• Medium carbon steels

Subcritical annealing is another name for ____________

• Process annealing

• Stress relief annealing

• Recrystallization annealing

• Spheroidise annealing

Commercial annealing is another name for ____________

• Process annealing

• Stress relief annealing

• Recrystallization annealing

• Spheroidise annealing