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Fuels and Combustion

Fuels and Combustion
Adiabatic flame temperature of a fuel is dependent on the initial temperature of

Air
Fuel
Both A & B
Neither A nor B

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

3500
1500
5000
150

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Fuels and Combustion
Removal of hydrogen from coke oven gas

Does not alter its calorific value
Increases its calorific value
Decreases its calorific value
Is not possible on commerical scale

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Fuels and Combustion
Grindability index of a coal is 100. It implies that the

Coal can be pulverised with great difficulty
Power consumption in grinding the coal will be very high
Coal can be easily pulverised
Coal can't be pulverised

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Fuels and Combustion
Carbon Content by weight in air dried wood may be about __________ percent.

10
50
25
80

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Fuels and Combustion
The calorific value of 'LPG' (50% propane + 50% butane) is about __________ kcal/Nm³.

10, 000
15, 000
5000
25, 000

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