Related Questions

Percentage of nitrogen in blast furnace gas may be around
A 5
B 25
C 55
D 80
Thermal efficiency of blast furnace stoves used for heating blast (air) may be about __________ percent.
A 20
B 40
C 60
D 80
In the blast furnace, incorporation of water vapour in the blast gives the following effect.
A Increases the reducing potential of the gas
B Increases the flame temperature
C No significant change occurs
D Increases the hydrogen content in the metal
Operation of blast furnace stove is based on the principles of a __________ furnace.
A Regenerative
B Recuperative
C Both A and B
D Neither A nor B
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
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 of the above
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 compared to blast furnace gas is
A More explosive and inflammable
B Less poisonous
C Lighter
D All of the above
The impure iron (pig iron) that is tapped out from blast furnace contains about __________ percent carbon.
A 0.2
B 2
C 4
D 8
Skull is not formed on the carbon blocks in the hearth of a blast furnace, when it becomes cold, becaus of its
A Non-wetting characteristic
B High thermal conductivity
C High crushing strength
D None of these

Next steps