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Fuels and Combustion

Fuels and Combustion
Blast furnace gas constitutes mainly of

N₂ & CO
CH₄ & CO₂
N₂ & H₂
N₂ & CH₄

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Fuels and Combustion
Calorific values of both the solid as well as the liquid fuels can be determined by __________ calorimeter.

None of these
Boy's
Junkar's
Bomb

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Fuels and Combustion
Dry air requirement for burning 1 Nm³ of CO to CO₂ may be around __________ Nm³.

1.75
11.4
2.4
0.87

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Fuels and Combustion
The main function of primary air in pulverised coal fired burner is to

Preheat the tertiary air used for complete combustion of CO to CO₂
Dry and transport the coal
Burn CO to CO₂
Have proper combustion by supplying it around the burner

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Fuels and Combustion
The ratio of maximum adiabatic flame temperature in air to that in pure oxygen is always

Unpredicatable
> 1
1

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Fuels and Combustion
Gas yield in the Kopper-Totzek coal gasifier is about __________ Nm³/ton coal (ash = 35%).

3500
150
1500
5000

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