The electric furnace in which heat is produced by a combination of induced current and skin effect is called _____________ furnace?

Related Mcqs:

1. An electric furnace producing heat by means of an electric arc struck between each of three electrodes and the charge is called ____________ furnace?

   A. Resistance B. Arc C. Low frequency induction D. None of these...

2. While the fuel fired furnace can be used upto a maximum temperature of about 1700°C, the electric furnace can be used upto a temperature of about _____________ °C?

   A. 2000 B. 3000 C. 4500 D. 6000...

3. _____________ furnace is not an electric furnace?

   A. Arc B. Induction C. Pot D. Resistance...

4. In a furnace, the heat taken by the charge/stock and the heat lost to the furnace structure & flue gases depends on the__________________?

   A. Rate of firing and emissivity of flame B. Thermal conductivity of the charge & structural materials of furnace C. Nature of process; whether batch, continuous or intermittent D. All A., B. and C....

5. Combustion of furnace oil in a furnace (soaking pit) with preheated combustion air at 400°C results in saving of about __________ percent furnace oil as compared to its combustion with atmospheric air, if the flue gas outlet temperature from the soaking pit is 1200°C ?

   A. 5 B. 60 C. 20 D. 40...

6. Ceramic coating material for furnace refractory, which increases its emissivity and thus the radiation heat transfer rate in the furnace, comprises of_________________?

   A. Graphite powder B. Thoria C. Zircon powder D. Beryllium...

7. In low or standard frequency induction furnace, heat is produced by the_______________________?

   A. Combination of induced current and skin effect B. Induction and resistance C. Current flow through a heating element D. None of these...

8. Furnace aerodynamics is related to the _____________ in the furnace?

   A. Movement of gases B. Measurement of flue gas volume C. Temperature control D. Pressure adjustment...

9. Rate of heat release in a furnace, which is the measure of heat intensity, is defined as_________________?

   A. kcal/hr/m3 combustion space B. kcal/m3 combustion space C. kcal/hr D. None of these...

10. Design of waste heat boiler for recovery of waste heat from furnace gases depends upon the_________________?

    A. Quantity & temperature of waste gas B. Dust concentration & nature of dust in waste gas C. Corrosive nature of the waste gas D. All A., B. and C....