Dust content in raw blast furnace gas is about _______________ gm/Nm3; hence it is cleaned to the dust level of about < 10 mg /Nm3 before use?

Related Mcqs:

1. Explosion limit of blast furnace gas is 37 to 71% gas in gas-air mixture. It means that the blast furnace gas will explode when burnt in a confined space, if its concentration in the gas-air mixture is _______________ percent?

   A. 71%
   C. In between 37 & 71%
   D. None of these

2. Yield of blast furnace gas is about _______________ Nm3 /ton of pig iron?

   A. 300
   B. 2000
   C. 5000
   D. 10000

3. Blast furnace gas is a very poisonous gas because of its predominantly high _______________ content?

   A. H2O
   B. CO2
   C. CO
   D. CH4

4. Calorific value of blast furnace gas is around _____________ KCal/Nm3?

   A. 850
   B. 1800
   C. 4200
   D. 6500

5. Ammonia content in raw coke oven gas is about _____________ gm/Nm3?

   A. 1
   B. 5
   C. 50
   D. 100

6. Dry air requirement for burning 1 Nm3 of CO to CO2 may be around _______________ Nm3 ?

   A. 2.4
   B. 1.75
   C. 0.87
   D. 11.4

7. Blast furnace gas compared to coke oven gas has_________________?

   A. Lower ignition temperature
   B. Narrower limit of inflammability
   C. Higher calorific value
   D. Lower theoretical flame temperature

8. Coke oven gas is a better fuel than blast furnace gas, because of its higher________________?

   A. Calorific value, cleanliness and relatively low distribution cost (due to its low specific gravity)
   B. Adiabatic flame temperature
   C. Heat release rate (thus requiring smaller combustion chamber)
   D. All A., B. and C.

9. Coke oven gas compared to blast furnace gas is________________?

   A. More explosive and inflammable
   B. Less poisonous
   C. Lighter
   D. All A., B. and C.

10. Oxygen required for theoretically complete combustion of 1 Nm3 methane is ______________ Nm3?

    A. 2
    B. 4
    C. 6
    D. 1