Related Questions

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
Thermal efficiency of blast furnace stoves used for heating blast (air) may be about __________ percent.
A 20
B 40
C 60
D 80
Waste/polluted water discharged from electroplating, blast furnace and coal mining industries contain mainly __________ substances.
A Radioactive
B Organic
C Inorganic
D None of these
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
Supplies, plant maintenance, plant rent, plant insurance and cleaning labour comes under which type of costs?
A labour costs
B factory overhead costs
C finished costs
D manufacturing costs
Which of the following combustibles is absent in blast furnace gas?
A H2
B CH4
C CO
D None of these

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