By which of the following methods the temperature inside arc nace can be varied ?
Correct answer: D. By any of the above method
- A. By disconnecting some of the heating elements
- B. By varying the operating voltage
- C. By varying the current through heating elements
- D. By any of the above method
Explanation
An arc furnace’s heat input depends on its electrical power, approximately given by VI. Therefore, changing the voltage, current, or the number of connected heating elements can vary the furnace temperature.
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