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Fuels and Combustion

Fuels and Combustion
The gas which contributes maximum to the heating value of natural gas is

CH₄
H₂
CO₂
CO

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Fuels and Combustion
Laboratory gas is obtained by the cracking of

Gasoline
Diesel
Fuel oil
Kerosene

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Fuels and Combustion
Coking time in a commercial high temperature coal carbonisation plant is about __________ hours.

18
36
6
28

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Fuels and Combustion
Natural draft created by the chimney depends upon

Both A & B
Its height
Neither A nor B
Temperature of the flue gas

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Fuels and Combustion
As time passes, the calorific value of stored coal

Decreases
Remains unaltered
May increase or decrease (depends on the method of storage)
Increases

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Fuels and Combustion
Atomising steam to fuel oil ratio in a burner should be around

2.5
1.5
0.5
3.5

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