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FUELS AND COMBUSTION

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

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

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Fuels and Combustion
Coal is pulverised before burning in large capacity boiler furnaces mainly to

Enhance its calorific value
Facilitate easy ash removal
Provide trouble free operation
Ensure its complete combustion

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Fuels and Combustion
Spontaneous combustion of coal on storage results due to

Low temperature oxidation
Storage in large heaps with small surface to volume ratio
Inadequate ventilation
All of these

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Fuels and Combustion
Coalification means the

Complete combustion of coal
Direct hydrogenation of coal
Underground gasification of coal
Process of conversion of lignite into anthracite

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Fuels and Combustion
Coking coals are invariably

Lignites
Semi-anthracites
Bituminous coals
Anthracites

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