Which of the following is called “blue gas”?

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. The gas which contributes maximum to the heating value of natural gas is __________________?

   A. CO
   B. CO2
   C. H2
   D. CH4

3. Main constituent of the gas produced from a gobar gas plant is___________________?

   A. CO2
   B. CH4
   C. H2
   D. CO

4. 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

5. The calorific value of a gas of composition CO2 = 20%, H2 = 50%, CH4 = 30%, is y. If the composition of gas is changed to H2 = 50%, CH4 = 30%, CO2 = 10%, N2 = 10%, then the calorific value will be___________________?

   A. y
   B. 0.95 y
   C. 1.05 y
   D. 1.8 y

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

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

7. 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.

8. 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.

9. Which of the following is a poisonous fuel gas ?

   A. Coke oven gas
   B. Blast furnace gas
   C. Natural gas
   D. None of these

10. Which of the following combustibles is absent in blast furnace gas ?

    A. H2
    B. CH4
    C. CO
    D. None of these