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

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. 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?

   A. 15-30
   B. 1-2
   C. 70-100
   D. 150-200

3. Gas yield in the Kopper-Totzek coal gasifier is about ______________ Nm3/ton coal (ash = 35%)?

   A. 150
   B. 1500
   C. 3500
   D. 5000

4. Yield of coke oven gas in low temperature carbonisation of coal is about ______________ Nm3 /ton of dry coal?

   A. 60
   B. 160
   C. 500
   D. 750

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

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

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

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

7. 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

8. Quantity of coke oven gas produced by high temperature carbonisation of one ton of dry coal may be around ______________ Nm3?

   A. 30
   B. 300
   C. 3,000
   D. 30,000

9. 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

10. 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.