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Fuels and Combustion

Fuels and Combustion
Pick the odd man out.

Oil gas
Pitch creosote mixture
Briquettes
Wood

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Fuels and Combustion
With increase in C/H ratio of a fuel, the dew point of flue gases

Remains same
Increases
Decreases
May increase or decrease ; depends on the type of fuel

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Fuels and Combustion
Water gas constitutes mainly of

CO₂ & H₂
CO & H₂
CO & N₂
CH₄ & H₂

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Fuels and Combustion
Use of excess of combustion air in the combustion of fuels results in

Condensation of water vapour from the fuel gas
Long flame
Heat losses
None of these

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

35 to 45
55 to 75
75
15 to 25

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Fuels and Combustion
The hottest part of the flame lies in its____zone.

Luminous
Non-luminous
Unburnt gases
Yellow

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