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