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- Subject
- Heating and Weldingelectrical-engineering-mcqs › heating-and-welding
- Published
- 17 Dec 2018
- Last updated
- 28 May 2026
Explanation
The electrode in a direct arc furnace is commonly made from graphite due to its excellent electrical conductivity and high resistance to heat, making it suitable for the harsh conditions inside the furnace.
More Heating and Welding MCQs
Practice related questions from the same subject.
- 1.Why is it important for a heating element to have a low temperature coefficient of resistance?
- 2.What is the preferred power factor for running arc furnaces?
- 3.When should the Ajax Wyatt furnace be ignited?
- 4.The radiation emitted by a black body is proportional to which of the following?
- 5.Which technique is commonly employed to regulate the temperature in resistance furnaces?
- 6.What is the role of a choke in an arc furnace?
- 7.In which process are hysteresis and eddy current losses primarily involved?
- 8.Why is mica utilized in electric presses in terms of its thermal and electrical conductivity?
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