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Fuels and Combustion

Fuels and Combustion
Main constituent of natural gas is

C₂H₆
H₂
CH₄ (upto 90%)
C₃H₈

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Fuels and Combustion
Power alcohol as compared to straight run gasoline has lower

Viscosity
Specific gravity
Octane number
Calorific value

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Fuels and Combustion
Gobar gas constitutes mainly of

CH₄ & N₂
CO & CO₂
CO & N₂
CH₄ & CO₂

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Fuels and Combustion
Emission of dense white smoke out of the chimney of a thermal power plant is an indication of the use of

Too much air for combustion
Less air for combustion
Pulverised coal in boilers
Correct amount of air for combustion

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Fuels and Combustion
Calorific value of coal middling generated in coal washeries during washing of coal may be around __________ Kcal/kg.

1000
4000
6000
8000

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Fuels and Combustion
The gasification reaction represented by, C + H₂O = CO + H₂, is

Endothermic
Autocatalytic
Exothermic
Catalytic

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