Heating and Welding Electrical Engineering MCQ Multiple Choice Questions

Heating and Welding Electrical Engineering MCQ Multiple Choice Questions. Prepare Top Interview Questions and Answers for Civil Engineering Interview Questions, Mechanical Engineering Interview Questions, Electrical Engineering Interview Questions, Online preparation tests for Engineering Students. Latest Heating and Welding Questions and Answers

1.   Which of the following is an advantage of heating by electricity?

2.   ________ has the highest value of thermal conductivity.

3. Which of the following heating methods has maximum power factor?

4. method has a leading power factor

5. is used for heating non-conducting materials.

6. Which of the following methods of heating is not dependent on the frequency of supply?

7. When a body reflects the entire radiation incident on it, then it is known as

8. For the transmission of heat from one body to another

9. Heat transfer by the condition will not occur when

10. A perfect black body is one that

11. Heat is transferred simultaneously by condition, convection, and radiation

12. The process of heat transfer during the reentry of satellites and missiles, at very high speeds, into the earth's atmosphere is known as

13. Which of the following has the highest value of thermal conductivity?

14. Induction heating process is based on which of the following principles?

15. Which of the following insulating materials was suitable for low-temperature applications?

16. A non-dimensional number generally associated with natural convection heat transfer is

17. The temperature inside a furnace is usually measured by which of the following?

18. Which of the following will happen if the thickness of the refractory wall of the furnace is increased?

19. The material of the heating element for a furnace should have

20. In a resistance furnace the atmosphere is 

21. By which of the following methods the temperature inside arc nace can be varied?

22. In induction heating ______ is abnormally high.

23. By the use of which of the following, high-frequency power supply for induction furnaces can be obtained?

24. Induction furnaces are employed for which of the following?

25. In an electric room heat convector the method of heating used is

26. In a domestic cake baking oven the temperature is controlled by

27. In an electric press mica is used

28. Induction heating takes place in which of the following?

29. For heating element high resistivity material is chosen to

30. In resistance heating highest working temperature is obtained from heating elements made of 

31. For intermittent work which of the following furnaces is suitable?

32. Due to which of the following reasons it is desirable to have a short arc length?

33. In the indirect resistance heating method, maximum heat transfer takes place by

34. Properly of low-temperature coefficient of the heating element is desired due to which of the following reasons?

35. Which of the following methods is used to control the temperature in resistance furnaces?

36. It is desirable to operate the arc furnaces at a power factor of

37. Radiations from a black body are proportional to

38. In an arc furnace the function of the choke is

39. Ajax Wyatt furnace is started when

40. In electric press, mica is used because it is _______ conductor of heat but/and ________ conductor of electricity.

41. Resistance variation method of temperature control is done by connecting resistance elements in

42. Hysteresis loss and eddy current loss are used in

43. In heating the ferromagnetic material by induction heating, heat is produced due to

44. Radiant heating is used for which of the following?

45. Which of the following devices is necessarily required for automatic temperature control in a furnace?

46. For radiant heating around 2250°C, the heating elements are made of

47. Which of the following is an advantage of eddy current heating?

48. The electrode of a direct arc furnace is made of

49. Direct arc furnaces have which of the following power factors?

50. Indirect arc furnace, which of the following has high value?

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