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Fuels and Combustion

Fuels and Combustion
Fusion point of coal ash increases with increase in its __________ content.

All of these
Lime and magnesia
Iron sulphate
Iron silicate

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Fuels and Combustion
With increase in the time of carbonisation at a particular temperature (say 1000°C), the __________ percentage in coke oven gas increases.

All of these
Unsaturated hydrocarbons
Methane
Hydrogen

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Fuels and Combustion
Main constituent of natural gas is

CH₄ (upto 90%)
C₂H₆
H₂
C₃H₈

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Fuels and Combustion
Traces of tar fog present in the coke oven gas is removed by

Electrostatic precipitator
Cyclone separator
Wet packed scrubber
Washing with monoethanolamine

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Fuels and Combustion
The maximum adiabatic flame temperature is attained, when the fuel is burnt with

Theoretically required amount of air
Theoretically required amount of oxygen
Less than theoretically required amount of air
More than theoretically required amount of air

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Fuels and Combustion
Kopper-Totzek coal gasifier (installed in a coal based nitrogeneous fertiliser plant) employs a/an __________ bed gasifier.

Entrained
Fluidised
Fixed
Moving

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