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Fuels and Combustion

Fuels and Combustion
For long flame and easy ignition, the coal used should have

High ash
High calorific value
Low ash
High volatile matter

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Fuels and Combustion
Yield of coke oven gas in low temperature carbonisation of coal is about __________ Nm³ /ton of dry coal.

160
60
750
500

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Fuels and Combustion
The ratio of maximum adiabatic flame temperature in air to that in pure oxygen is always

Unpredicatable
1
> 1

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Fuels and Combustion
Pitch creosote mixture (PCM) as compared to furnace oil is a better fuel, because its

Sulphur content is lower
Emissivity factor is higher
All of these
Flue gas has lower dew point thereby facilitating more waste heat recovery

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Fuels and Combustion
Furnace oil consumption in a furnace for a given duty employing preheated combination air (at 300° ) may be reduced by about __________ percent as compared to the use of atmospheric combustion air.

35
5
10
20

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

Fluidised
Fixed
Moving
Entrained

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MORE MCQ ON Fuels and Combustion

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