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HEAT TREATMENT
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1) Which is a kind of surface hardening process?
Cementide
Ferrite
Nitriding
Tempering
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Correct Answer: Nitriding
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1) Which is a kind of surface hardening process?
Cementide
Ferrite
Nitriding
Tempering
2) How much time is allowed normally in soaking zone for a 10mm thick metal piece while hardening?
5 minutes
10 minutes
15 minutes
20 minutes
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Correct Answer: 5 minutes
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2) How much time is allowed normally in soaking zone for a 10mm thick metal piece while hardening?
5 minutes
10 minutes
15 minutes
20 minutes
3) What is colour of a metal piece when heated to 250 Degree C while doing the tempering process?
Blue
Brown
Purple
Pale
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Correct Answer: Brown
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3) What is colour of a metal piece when heated to 250 Degree C while doing the tempering process?
Blue
Brown
Purple
Pale
4) What is the purpose of tempering a steel?
To reduce the brittleness
To remove the ductility
To increase the hardness
To increase the brittleness
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Correct Answer: To reduce the brittleness
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4) What is the purpose of tempering a steel?
To reduce the brittleness
To remove the ductility
To increase the hardness
To increase the brittleness
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