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