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Fuels and Combustion

Fuels and Combustion
The calorific value of producer gas is around __________ kcal/Nm³

9000
1300
4500
500

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Fuels and Combustion
Volatile matter content of metallurgical coke may be around __________ percent.

1-2
22-26
10-15
30-33

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

1
Unpredicatable
> 1

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Fuels and Combustion
Which of the following is unsuitable fuel for producer gas manufacture?

Anthracite
Coal having low fusion point of its ash
Coke
Coal having high fusion point of its ash

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Fuels and Combustion
Which of the following has the highest gross calorific value?

Oil refinery gas
Carburetted water gas
Blast furnace gas
Coke oven gas

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Fuels and Combustion
Coke oven gas burns with an yellowish flame, because of the presence of

H₂
NH₃
CH₄
CO₂

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