Which of the following would require least amount of secondary air for – McqOptions

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

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