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Fuels and Combustion

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

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

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Fuels and Combustion
Purity of coke means that, it is high in carbon and low in

Ash
Iron
Moisture
Volatiles

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Fuels and Combustion
Advantages of fluidised bed combustion are

High heat transfer rate
All of these
Reduced NOx formation in flue gas
Lower furnace operating temperature

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Fuels and Combustion
Yield of charcoal in high temperature carbonisation of wood is about __________ percent.

75
50
25
10

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Fuels and Combustion
Coals used for the generation of producer gas should have

Low fusion point of ash
Very low ash content (8-10%)
High volatile matter content
High caking index

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Fuels and Combustion
Caking index of a coal is a measure of its

Porosity
Agglutinating (binding) properties
Abradability
Reactivity

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