Which of the following would require least amount of secondary air for combustion ?
Correct answer: A. Coke breeze containing 25% ash and 2% volatile matter
- 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
Explanation
Secondary air mainly burns volatile combustible gases released from the fuel. Coke breeze has only about 2% volatile matter, so it requires the least secondary air among the listed fuels.
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