Specific heating capacity of a furnace is expressed as_____________________?

Related Mcqs:

1. The heating capacity of muffle furnace depends on the____________________?

   A. Surface area & emissivity of the stock
   B. Properties of the muffle wall (temperature, area, and emissivity)
   C. Both A. & B.
   D. Neither A. nor B.

2. The heating capacity of muffle furnace depends on the_________________?

   A. Surface area & emissivity of the stock
   B. Properties of the muffle wall (temperature, area, and emissivity)
   C. Both A. & 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. Thermal efficiency of blast furnace stoves used for heating blast (air) may be about _____________ percent?

   A. 20
   B. 40
   C. 60
   D. 80

5. Overall thermal efficiency of a lumpy coal fired suitably designed heating furnace, if operated & maintained properly may be about ____________ percent?

   A. 10-15
   B. 25-30
   C. 45-50
   D. 65-70

6. If the flame is produced under the hearth and then sweeps up into the heating chamber, this is called a/an ______________ furnace?

   A. Sidefired
   B. Underfired
   C. Covered
   D. Recirculating

7. Which furnace employs preheating, heating and soaking zones ?

   A. Soaking pit
   B. Reheating furnace
   C. Open hearth furnace
   D. Cupola

8. 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

9. 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

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