Fuels and Combustion
A fuel with high heat release rate will

Require smaller combustion chamber
Have high calorific value
Have high adiabatic flame temperature
None of these

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Fuels and Combustion
A liquid/gaseous fuel containing hydrocarbons and high amount of sulphur is burnt with 40% excess air. The flue gas still contains large amount of carbon monoxide. This may be due to the

Low calorific value of the fuel
Presence of large quantity of hydrogen in the fuel
Lack of thorough mixing of fuel with air
High sulphur content in the fuel

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Fuels and Combustion
Cannel coal

Has a high volatile matter content and burns with a luminous smoky flame
Is non-coking
All of these
Is a non-banded coal which can be ignited easily with a match stick or candle flame, hence is so named

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Fuels and Combustion
Fixed carbon in coal is defined as

Hundred minus the percentage of volatile matter, ash and moisture
That present in volatile matters
The one which is present in the residue after combustion
The total quantity of carbon present in the coal

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