ASSEMBLY - Practice Mode

1) What is the temperature that change of structure to austenite starts at 723? in heat treatment process?

Lower critical temperature Upper critical temperature Melting temperature Critical temperature

Correct Answer: Lower critical temperature

2) What is the process if hot steel is cooled slowly the old structure is retained and it will have fine grains that makes it easily machined?

Annealing Hardening Tempering Normalising

Correct Answer: Annealing

3) What is the name if hot steel cooled rapidly to form a new structure ?

Ferrite Austenite Martensite Pearlite

Correct Answer: Martensite

4) What is the process to add cutting ability and wear resistance on steel?

Tempering Annealing Normalising Hardening

Correct Answer: Hardening

5) What is the heat treatment process to remove extreme brittleness and induce toughness and shock resistance in steel?

Tempering Annealing Normalising Hardening

Correct Answer: Tempering

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