Sometimes water is sprayed during coal charging in the coke oven, which helps in

Fuels and Combustion
Sometimes water is sprayed during coal charging in the coke oven, which helps in

Controlling the dust nuisance while charging the coal

Reducing the cracking of hydrocarbons in the gas and increasing the percentage of CO & H₂ in the gas (due to the endothermic reaction represented by C + H₂O = CO + H₂)

All of these

Prevention of clinker formation in the oven

Controlling the dust nuisance while charging the coal

Reducing the cracking of hydrocarbons in the gas and increasing the percentage of CO & H₂ in the gas (due to the endothermic reaction represented by C + H₂O = CO + H₂)

All of these

Prevention of clinker formation in the oven

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Fuels and Combustion
A carbonaceous fuel (containing no H₂ or hydrocarbons) is burnt and the resulting flue gas contains 21% CO₂. It means that

No excess air has been used for combustion

21% excess oxygen has been used for combustion

Complete combustion of fuel has taken place

21% excess air has been used for combustion

No excess air has been used for combustion

21% excess oxygen has been used for combustion

Complete combustion of fuel has taken place

21% excess air has been used for combustion

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Fuels and Combustion
Incomplete combustion of fuel in the furnace is judged by high __________ of the flue gases.

Dew point

CO₂ content

CO content

O₂ content

Dew point

CO₂ content

CO content

O₂ content

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Fuels and Combustion
Coals used for the generation of producer gas should have

High caking index

Very low ash content (8-10%)

Low fusion point of ash

High volatile matter content

High caking index

Very low ash content (8-10%)

Low fusion point of ash

High volatile matter content

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Fuels and Combustion
Fuel consumption in coke making can be reduced by

All of these

Preheating, blending and de-ashing the coal

Stamped charging of coal

Dry quenching of coke

All of these

Preheating, blending and de-ashing the coal

Stamped charging of coal

Dry quenching of coke

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Fuels and Combustion
Which of the following is a rich fuel gas?

Coal gas from underground gasification of coal

Producer gas

Refinery gases

None of these

Coal gas from underground gasification of coal

Producer gas

Refinery gases

None of these

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Fuels and Combustion

Fuels and Combustion Sometimes water is sprayed during coal charging in the coke oven, which helps in

Fuels and Combustion A carbonaceous fuel (containing no H₂ or hydrocarbons) is burnt and the resulting flue gas contains 21% CO₂. It means that

Fuels and Combustion Incomplete combustion of fuel in the furnace is judged by high __________ of the flue gases.

Fuels and Combustion Coals used for the generation of producer gas should have

Fuels and Combustion Fuel consumption in coke making can be reduced by

Fuels and Combustion Which of the following is a rich fuel gas?

Fuels and Combustion
Sometimes water is sprayed during coal charging in the coke oven, which helps in

Fuels and Combustion
A carbonaceous fuel (containing no H₂ or hydrocarbons) is burnt and the resulting flue gas contains 21% CO₂. It means that

Fuels and Combustion
Incomplete combustion of fuel in the furnace is judged by high __________ of the flue gases.

Fuels and Combustion
Coals used for the generation of producer gas should have

Fuels and Combustion
Fuel consumption in coke making can be reduced by

Fuels and Combustion
Which of the following is a rich fuel gas?