Which furnace employs preheating, heating and soaking zones ?

Related Mcqs:

1. 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...

2. Which furnace employs an I.D. fan for the removal of flue gases from the furnace ?

   A. Coke oven B. Blast furnace stoves C. Beehive coke oven D. High pressure boiler...

3. Soaking pits are meant for heating steel_________________?

   A. Ingots B. Coils C. Sheets D. Slabs...

4. In furnaces operating at very high temperature (say) 1250°C, e.g. soaking pit), the maximum heat transfer takes place by__________________?

   A. Conduction B. Convection C. Radiation D. Cannot be predicted...

5. 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....

6. 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....

7. Thermal efficiency of blast furnace stoves used for heating blast (air) may be about _____________ percent?

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

8. Specific heating capacity of a furnace is expressed as_____________________?

   A. Weight heated/hr B. Weight heated/furnace volume C. Weight heated/hr/furnace volume D. None of these...

9. 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...

10. 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...