Induction furnaces are employed for which of the following?
A. Heat treatment of castings
B. Heating of insulators
C. Melting aluminium
D. None of the above
Answer: Option A
A. Heat treatment of castings
B. Heating of insulators
C. Melting aluminium
D. None of the above
Answer: Option A
A. To avoid initial rush of current
B. To avoid change in kW rating with temperature
C. Both (A) and (B)
D. Either (A) or (B)
The material of the heating element for a furnace should have
A. Lower melting point
B. Higher temperature coefficient
C. High specific resistance
D. All of the above
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