Fuels and Combustion
Which of the following would require least amount of secondary air for combustion?

Semi-bituminous coal containing 25% ash and 20% volatile matter
Anthracite containing 10% volatile matter and 8% ash
Bituminous coal containing 20% ash and 25% volatile matter
Coke breeze containing 25% ash and 2% volatile matter

ANSWER DOWNLOAD EXAMIANS APP