Fuels and Combustion
Safe condition for storage of high V.M. bituminous coal is that

Maximum 200 tons should be stored in a heap
Neither A nor B
Height of the coal heap should be < 3 metres
Both A and B

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Fuels and Combustion
Fixed carbon in coal is defined as

The total quantity of carbon present in the coal
That present in volatile matters
The one which is present in the residue after combustion
Hundred minus the percentage of volatile matter, ash and moisture

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