______________ is an indirectly heated furnace?

Related Mcqs:

1. An example of indirectly heated furnace is the_________________?

   A. Soaking pit
   B. Muffle furnace
   C. Reheating furnace
   D. None of these

2. Example of an indirectly heated furnace is__________________?

   A. Hood annealing furnace
   B. Muffle furnace
   C. Both A. and B.
   D. Neither A. nor B.

3. 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

4. An improved and fuel efficient version of the pusher type reheating furnace is the ______________ furnace?

   A. Walking beam
   B. Shaft
   C. Tunnel
   D. Rotary hearth

5. In reverberatory furnace, charge is heated mainly by__________________?

   A. Conduction
   B. Natural convection
   C. Radiation of heat from the roof of the combustion chamber
   D. None of these

6. 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.

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

   A. Arc
   B. Resistance
   C. Low frequency induction
   D. High frequency induction

8. 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

9. _____________ furnace is not an electric furnace?

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

10. 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