The temperature inside a furnace is usually measured by which of the following?
A. Optical pyrometer
B. Mercury thermometer
C. Alcohol thermometer
D. Any of the above
Answer: Option A
This Question Belongs to Electrical Engineering >> Heating And Welding
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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
In induction heating __________ is abnormally high.
A. Phase angle
B. Frequency
C. Current
D. Voltage
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