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Heating and Welding - Interview Questions and Answers

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36. Induction heating takes place iitwhich of the following ?
A. Insulating materials
B. Conducting materials which are magnetic
C. Conducting materials which are non-magnetic
D. Conducting materials which may or may not be magnetic
Explanation:
37. For intermittent work which of the following furnaces is suitable ?
A. Indirect arc furnace
B. Core less furnace
C. Either of the above
D. None of the above
Explanation:
38. Which of the following devices is necessarily required for automatic temperature control in a furnace ?
A. Thermostat
B. Thermocouple
C. Auto-transformer
D. Heating elements of variable resis-tance material
Explanation:
39. In an electric press mica is used
A. as an insulator
B. as a device for power factor improvement
C. for dielectric heating
D. for induction heating
Explanation:
40. Ajax Wyatt furnace is started when
A. it is filled below core level
B. it is filled above core level
C. it is fully empty
D. none of the above
Explanation:
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