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Medical Science
MEDIUM
ENGLISH
Medical Science
Heat hardening is the process done at_______________?
A
Heating 750°C and slowly cooling to zero degree
Option A
B
Heating quickly upto 450°C followed by sudden quenching
Option B
Heating upto 250°C for 15 to 30 min
Correct answer
D
Heating at 750°C and then quenching to room temperature
Option D
Correct answer: C
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