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Fuels and Combustion

Fuels and Combustion
Presence of __________ in a dry gaseous fuel does not contribute to its calorific value.

Hydrogen
Sulphur
Oxygen
Carbon

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Fuels and Combustion
High excess air in combustion of fuels results in

None of these
Increased fuel consumption
Smoky flame
Incomplete combustion

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Fuels and Combustion
Highly reactive coke have lower

Critical air blast (CAB) value
Porosity
Coke reactivity index (CRI)
Both B and C

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Fuels and Combustion
Producer gas comprises mainly of

CO₂ & N₂
CO₂ & H₂
CO & N₂
CO & H₂

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Fuels and Combustion
Percentage of nitrogen in blast furnace gas may be around

25
5
55
80

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Fuels and Combustion
__________ is used as jet engine fuel.

Diesel
LPG
Kerosene
Petrol

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