Fuels and Combustion
Undercharging of coal in the by-product coke ovens results in

Increase in its throughput
No change in the c.v. of coke oven gas
Increase in the c.v. of coke oven gas
Decrease in the c.v. of coke oven gas

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

Enhanced sensible heat loss in the flue gas
Intermittant and uncontrolled combustion of the fuel
Excessive power requirement of air blower
High exit flue gas temperature from the furnace

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