Related Mcqs:

1. Higher furnace temperature cannot be achieved by use of a lean fuel gas in the furnace by_________________?

   A. Increasing the draft in the furnace
   B. Preheating the fuel gas
   C. Oxygen enrichment of combustion air
   D. Preheating the combustion air

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. 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. Oxygen percentage in the flue gas coming out of a gaseous fuel fired furnace should be ideally about _____________ percent?

   A. < 2
   B. < 5
   C. < 8
   D. < 10

5. Pulverised fuel fired furnaces employ ______________ fuel firing?

   A. Horizontal
   B. Vertical
   C. Tangential
   D. All A., B. and C.

6. 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

7. Which of the following is not a directly fired furnace ?

   A. By-product coke oven
   B. Calcination kiln
   C. Sintering furnace
   D. Open hearth furnace

8. Which of the following is a directly fired intermittent furnace ?

   A. Walking beam reheating furnace
   B. Reverberatory furnace
   C. Tower furnace
   D. Tunnel kiln

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. Flue gas outlet temperature from the chimney of any furnace should be ideally about ______________ °C?

    A. 50
    B. 100
    C. 150
    D. 250