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Electrical Engineering- Heating And Welding MCQs
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Electrical Engineering- Heating And Welding MCQs
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25 Questions

1. In resistance heating highest working temperature is obtained from heating elements made of
2. The process of heat transfer during the reentry of satellites and missiles, at very high speeds, into earth's atmosphere is known as
3. Induction heating takes place iitwhich of the following ?
4. For heating element high resistivity material is chosen to
5. is used for heating non-conducting materials.
6. A perfect black body is one that
7. In a domestic cake baking oven the temperature is controlled by
8. For the transmission of heat from one body to another
9. Properly of low temperature co-eflficient of heating element is desired due to which of the following reasons ?
10. Which of the following is an advantage of eddy current heating ?
11. method has leading power factor
12. In a resistance furnace the atmosphere is
13. ________ has the highest value of thermal conductivity.
14. Which of the following heating methods has maximum power factor ?
15. Which of the following insulating materials was suitable for low temperature applications ?
16. Which of the following is an advantage of heating by electricity ?
17. Which of the following will happen if the thickness of refractory wall of furnace is increased ?
18. For intermittent work which of the following furnaces is suitable ?
19. In arc furnace the function of choke is
20. Induction heating process is based on which of the following principles ?
21. Induction furnaces are employed for which of the following ?
22. Radiations from a black body are proportional to
23. The material of the heating element for a furnace should have
24. By which of the following methods the temperature inside arc nace can be varied ?
25. Radiant heating is used for which of the following ?

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