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Fuels and Combustion

Fuels and Combustion
Coal is heated in absence of air for 7 minutes at a temperature of about __________ °C, during its volatile matter determination for proximate analysis.

950
750
550
1150

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Fuels and Combustion
Percentage of hydrogen in coke oven gas may be around

25
10
60
45

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Fuels and Combustion
'Fuel' can be defined as a substance which produces heat by

All of these
Nuclear fusion
Combustion
Nuclear fission

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Fuels and Combustion
__________ process is meant for direct hydrogenation of coal to produce liquid fuel.

Lurgi
Fischer-Tropsch
Bergius
None of these

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Fuels and Combustion
Preheating of a gaseous fuel results in increased

Ignition temperature
Quantity of flue gas
Flame length
Flame temperature

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Fuels and Combustion
As the equilibrium moisture content of the coal increases, its

Swelling number increases
Swelling number decreases
Bulk density decreases
Calorific value increases

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