Electric Heating Interview Questions:
Following are the below Electric Heating Interview Questions and Important Questions which is very useful for interviews and exams
1. What are the advantages of electric heating ? Give classification of various electric heating methods along with brief account of their working principles.
2. Write the Stefan’s law of heat radiation and label all constants.
3. Discuss various methods of electric heating and explain any one of them.
4. Explain the different methods of electric heating and their field of applications.
5. What are the desirable properties the materials for heating element should have ? Name a few materials.
6. Discuss the methods of temperature control of resistance ovens.
7. Explain the design procedure of the heating elements when the power and voltage of the oven are known.
8. What are the essential properties of resistance heating elements ? How will you design such elements in case of resistance heating.
9. What are the requirements of a good heating material. Describe different type of heating materials. Also describe causes of failure of heating elements.
10. Describe with the help of neat sketches salient features of (i) air circulation ovens (ii) bright annealing (iii) radiant heating and (iv) salt bath heating and give application of each.
11. What are the different methods of heating ? Describe briefly the methods of direct and indirect resistance heating. List the applications of these two methods.
12. Describe various methods of controlling the temperature in resistance ovens.
13. Describe the construction and operation of direct type arc furnace.
14. Describe advantages of electrical heating and functioning of indirect arc furnace.
15. Describe the construction and working of a 3-phase arc furnace.
16. With neat sketches, describe the construction, principle of operation, applications and control methods of direct and indirect arc furnaces.
17. Explain construction, operation, performance and applicaÂtion of arc furnace.
18. Explain Principle of induction heating.
19. Explain different methods of induction heating. Give some applications of induction heating.
20. With neat sketches, describe the construction, principle of operation, applications and control methods of Ajax-Wyatt vertical core furnace.
21. Explain with neat sketches and describe the construction, principle of operation and application of Ajax Wyatt furnace.
22. Explain the working of Tama furnace with the help of neat diagram.
23. With the help of diagram describe the working of a coreless type induction furnace. Mention advantages of coreless type furnace.
24. Describe a coreless induction furnace.
25. Explain the method of induction heating and describe coreless type of induction furnace.
26. Describe the construction and working of an induction furnace suitable for melting non-ferrous metals. What are the various sources of generating high frequency energy for induction heating ? Describe in brief.
27. Explain the principle of high frequency induction heating.  Discuss the factors affecting the depth of penetration of heat.
28. Describe with the help of a neat sketch, the working of a vertical core type induction furnace. Give the applications of high frequency eddy current heating.
29. Describe the principle of induction heating at high frequency and highlight applications of the eddy current heating.
30. What is dielectric heating ? Explain the factors on which the dielectric loss in a dielectric material depend.
31. Explain dielectric heating. What is the rate of rise of temperature in dielectric heating ? Discuss the advantages of dielectric heating.
32. State the advantages of electric heating. Explain the principle of induction heating. What are the applications of induction heating ?
33. What is dielectric heating and dielectric loss ?
34. Explain the principle of ‘dielectric heating’. Derive the mathematical expression of power consumed in such process. State important applications of dielectric heating.
35. What is dielectric heating ? Explain the factors on which the dielectric loss in a dielectric material depends.
36. What is dielectric heating ? Explain why very high freÂquency should not be used for dielectric heating.
37. Compare induction heating and dielectric heating. Discuss different applications where dielectric heating and induction heating are used.
38. Discuss various applications of dielectric heating.
39. Write short notes on the following
- Electric heating.
- Resistance heating.
- Arc furnace.
- Induction heating.
- Coreless induction furnace.
- Dielectric heating.