During coal carbonisation process, the conversion of semi-coke to coke is accompanied by an increase in the __________ of the mass.

Fuels and Combustion
During coal carbonisation process, the conversion of semi-coke to coke is accompanied by an increase in the __________ of the mass.

None of these

Density

Porosity

Electrical resistivity

None of these

Density

Porosity

Electrical resistivity

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Fuels and Combustion
Combustion reaction of fuels is a/an __________ reaction.

None of these

Exothermic

Auto catalytic

Endothermic

None of these

Exothermic

Auto catalytic

Endothermic

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Fuels and Combustion
About __________ Nm³ of air will be required for the complete combustion of 2Nm³ of CO.

1

5

3

2

1

5

3

2

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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

Prevention of clinker formation in the oven

All of these

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)

Controlling the dust nuisance while charging the coal

Prevention of clinker formation in the oven

All of these

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)

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Fuels and Combustion
If the specific heat of gaseous products of combustion of a fuel is high, the abiabatic flame temperature will be

High

Very high, if the fuel is of low calorific value

None of these

Low

High

Very high, if the fuel is of low calorific value

None of these

Low

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Fuels and Combustion
Caking index of the coal blend used for the manufacture of metallurgical coke should be around

40

5

48

21

40

5

48

21

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Fuels and Combustion

Fuels and Combustion During coal carbonisation process, the conversion of semi-coke to coke is accompanied by an increase in the __________ of the mass.

Fuels and Combustion Combustion reaction of fuels is a/an __________ reaction.

Fuels and Combustion About __________ Nm³ of air will be required for the complete combustion of 2Nm³ of CO.

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

Fuels and Combustion If the specific heat of gaseous products of combustion of a fuel is high, the abiabatic flame temperature will be

Fuels and Combustion Caking index of the coal blend used for the manufacture of metallurgical coke should be around

Fuels and Combustion
During coal carbonisation process, the conversion of semi-coke to coke is accompanied by an increase in the __________ of the mass.

Fuels and Combustion
Combustion reaction of fuels is a/an __________ reaction.

Fuels and Combustion
About __________ Nm³ of air will be required for the complete combustion of 2Nm³ of CO.

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

Fuels and Combustion
If the specific heat of gaseous products of combustion of a fuel is high, the abiabatic flame temperature will be

Fuels and Combustion
Caking index of the coal blend used for the manufacture of metallurgical coke should be around