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Fuels and Combustion

Fuels and Combustion
Combustion reaction of fuels is a/an __________ reaction.

Endothermic
None of these
Auto catalytic
Exothermic

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Fuels and Combustion
C.V. (kcal/Nm³) of gaseous fuels __________ with increase in molecular weight.

Remains constant
Decreases
May increase or decrease, depends on combustibles
Increases

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Fuels and Combustion
__________ of the coal is the basis for Seylor's coal classification.

Proximate analysis
Caking index
Calorific value
Ultimate analysis

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Fuels and Combustion
Which of the following has the highest calorific value (kcal/Nm³) ?

Carburetted water gas
Natural gas
LPG
Gobar gas

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Fuels and Combustion
Ammonia content in raw coke oven gas is about __________ gm/Nm³.

50
1
15
100

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Fuels and Combustion
Which of the following petrological constitutes is responsible for bright and lustrous black band of bituminous coal?

Fussain
Vitrain
Durain
Clarain

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