Fuels and Combustion
The difference between total carbon and fixed carbon of coal will be minimum in case of

Lignite
Bituminous coal
High temperature coke (V.M < 0.5%)
Anthracite

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Fuels and Combustion
Which of the following would require least amount of secondary air for combustion?

Anthracite containing 10% volatile matter and 8% ash
Bituminous coal containing 20% ash and 25% volatile matter
Semi-bituminous coal containing 25% ash and 20% volatile matter
Coke breeze containing 25% ash and 2% volatile matter

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Fuels and Combustion
Cannel coal

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

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