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Fuels and Combustion

Fuels and Combustion
Percentage of hydrogen in coke oven gas may be around

10
25
45
60

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Fuels and Combustion
Ash content in the middling coal (a byproduct of coal washeries) in India ranges between __________ percent.

55 to 75
15 to 25
35 to 45
75

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Fuels and Combustion
Too much of excess air in combustion results in high

Fuel consumption for the same heat load
Percentage of oxygen in flue gases
All of these
Stack gas temperature

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Fuels and Combustion
The calorific value is the highest out of the following for

Blast furnace gas
Water gas
Producer gas
Coke oven gas

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Fuels and Combustion
Stack (chimney) height in a big thermal power plant is dictated by the

Draught to be created
Pollution control aspect
Limitation of constructional facilities
None of these

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Fuels and Combustion
Producer gas comprises mainly of

CO & N₂
CO₂ & N₂
CO₂ & H₂
CO & H₂

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