FUELS AND COMBUSTION QUIZ

More than theoretically required amount of air

Theoretically required amount of air

Theoretically required amount of oxygen

Less than theoretically required amount of air

All of these

1kg mole

32 kg

22.4 Nm³

Calorific value of the coke oven gas decreases due to cracking of hydrocarbons which is not compensated by increase in CO & H? content

All of these

Methane content in the coke oven gas decreases and carbon monoxide content increases

Hydrogen content of coke oven gas increases due to cracking of hydrocarbons

Drug intermediates e.g. β-naphthol

Unsaturated polyesters

All of these

Insecticides (e.g. moth balls)

Provides a lower rate of heat release

Develops a low temperature flame

Can be done with less excess air

Develops a non-luminous flame

May increase or decrease ; depends on the quantity of products of combustion

Decrease

Remain unchanged

Increase

LPG

Diesel

Kerosene

Petrol

Affects the quality of steel produced as cracks develop on the surface while rolling the steel

Both A and B

Contributes to its heating value

Neither A nor B

Increase the gas production rate

Increase the combustion rate

Minimise the chances of clinker formation

Convert CO to CO₂

Time of carbonisation

All of these

Yield of gas and tar

Fuel consumption in coking