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Fuels and Combustion

Fuels and Combustion
Quantity of coke produced from metallurgical coal may be around __________ percent.

30
95
75
50

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Fuels and Combustion
In low temperature carbonisation of coal as compared to high temperature carbonisation __________ produced is less.

Yield of ammonia present in coke oven gas
Free carbon content in tar
Yield percentage of coke
Difference in gross & net calorific value of the coke oven gas

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Fuels and Combustion
If the specific heat of gaseous products of combustion of a fuel is high, the abiabatic flame temperature will be

Low
Very high, if the fuel is of low calorific value
High
None of these

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Fuels and Combustion
Narrow coke ovens as compared to wider coke ovens

Produce stronger coke
Require less time of carbonisation
All of these
Produce smaller coke

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Fuels and Combustion
Efficiency of the combustion of a fuel is judged by the __________ the flue gas.

%of CO₂ in
% of O₂in
Colour of
Temperature of

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Fuels and Combustion
Which of the following is not a micro component present in coal?

Fusinite
Clarain
Liptinite
Micrinite

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