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Fuels and Combustion

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

Entrained
Fluidised
Moving
Fixed

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Fuels and Combustion
A fuel containing carbon and carbon monoxide (but containing no hydrogen or its compounds) is burnt in pure oxygen at constant pressure. Its gross calorific value as compared to net calorific value will be

Data insufficient; can't be predicted
Less
More
Same

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Fuels and Combustion
Largest constituent of coke oven gas is

H₂
CO₂
CH₄
N₂

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Fuels and Combustion
Fuel combustion is never cent per cent efficient due to

Moisture loss
Incomplete combustion
All of these
Dry gas/stack gas loss

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Fuels and Combustion
As the C/H ratio of the fuel increases, the amount of CO₂ formed on combustion __________ for the same percentage of excess air.

Increases
May increase or decrease depending on the type of fuel
Remains same
Decreases

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Fuels and Combustion
Bomb calorimeter is used to determine the (where, GCV - Gross Calorific Value. NCV - Net Calorific Value.)

GCV at constant volume
NCV at constant pressure
GCV at constant pressure
NCV at constant volume

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