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chemical engineering fuels and combustion
1. Which of the following would require least amount of secondary air for combustion ?
(A): Anthracite containing 10% volatile matter and 8% ash.
(B): Bituminous coal containing 20% ash and 25% volatile matter.
(C): Coke breeze containing 25% ash and 2% volatile matter.
(D): Semi-bituminous coal containing 25% ash and 20% volatile matter.
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