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Fuels and Combustion

The main drawback of supplying more excess air in the combustion of fuel is the_________________?

Fuels and Combustion /
The main drawback of supplying more excess air in the combustion of fuel is the_________________?

A. Excessive power requirement of air blower
B. Enhanced sensible heat loss in the flue gas
C. Intermittent and uncontrolled combustion of the fuel
D. High exit flue gas temperature from the furnace

The main drawback of supplying more excess air in the combustion of fuel is the_________________? Read More »

Fuels and Combustion

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

Fuels and Combustion /
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

Which of the following would require least amount of secondary air for combustion ? Read More »

Fuels and Combustion

To avoid fire by spontaneous combustion of coal due to its low temperature oxidation, it should be stored in___________________?

Fuels and Combustion /
To avoid fire by spontaneous combustion of coal due to its low temperature oxidation, it should be stored in___________________?

A. Shallow and small piles
B. Fine sizes without the presence of any lump
C. Closed space without any ventilation facility
D. Large heaps with small surface to volume ratio

To avoid fire by spontaneous combustion of coal due to its low temperature oxidation, it should be stored in___________________? Read More »

Fuels and Combustion