A. induction heating of steel
B. dielectric heating
C. induction heating of brass
D. resistance heating
Related Mcqs:
- Which of the following is an advantage of eddy current heating ?
A. The amount of heat generated can be controlled accurately
B. Heat at very high rate can be gene-rated
C. The area of the surface over which heat is produced can be accurately controlled
D. All of the above - Which of the following methods of heating is not dependent on the frequency of supply ?
A. Induction heating
B. Dielectric heating
C. Electric resistance heating
D. All of the above - When a body reflects entire radiation incident on it, then it is known as____________?
A. white body
B. grey body
C. black body
D. transparent body - A perfect black body is one that_____________?
A. transmits all incident radiations
B. absorbs all incident radiations
C. reflects all incident radiations
D. absorbs, reflects and transmits all incident radiations - In a resistance furnace the atmosphere is_____________?
A. oxidizing
B. deoxidising
C. reducing
D. neutral - In the indirect resistance heating method, maximum heat-transfer takes place by____________?
A. radiation
B. convection
C. conduction
D. any of the above - Induction furnaces are employed for which of the following ?
A. Heat treatment of castings
B. Heating of insulators
C. Melting aluminium
D. None of the above - In a domestic cake baking oven the temperature is controlled by________________?
A. voltage variation
B. thermostat
C. auto-transformer
D. series-parallel operation - Direct arc furnaces have which of the following power factors ?
A. Unity
B. Low, lagging
C. Low, leading
D. Any of the above - Radiations from a black body are proportional to____________?
A. T1
B. T2
C. T3
D. T*
