Fuels and Combustion
Presence of free moisture in coal is most disadvantageous during

Handling (e.g. when emptying wagons)
Its pulverisation (as it requires more power)
None of these
Combustion of fire slacks on the grates

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Fuels and Combustion
Cannel coal

Is a non-banded coal which can be ignited easily with a match stick or candle flame, hence is so named
Is non-coking
Has a high volatile matter content and burns with a luminous smoky flame
All of these

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