A. 5
B. 25
C. 55
D. 80
Related Mcqs:
- 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 - Percentage of carbon monoxide in blast furnace gas may be around ____________________ ?
A. 8
B. 14
C. 22
D. 52 - 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 - Blast furnace gas is a very poisonous gas because of its predominantly high _______________ content?
A. H2O
B. CO2
C. CO
D. CH4 - 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. - 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. - Largest constituent of blast furnace gas is__________________?
A. N2
B. CO
C. CO2
D. H2 - Which of the following combustibles is absent in blast furnace gas ?
A. H2
B. CH4
C. CO
D. None of these - Yield of blast furnace gas is about _______________ Nm3 /ton of pig iron?
A. 300
B. 2000
C. 5000
D. 10000 - Blast furnace gas burns with a bluish flame, because of the presence of____________________?
A. CO
B. CH4
C. CO2
D. S
