A liquid/gaseous fuel containing hydrocarbons and high amount of sulphur is burnt with 40% excess air. The flue gas still contains large amount of carbon monoxide. This may be due to the

Fuels and Combustion
A liquid/gaseous fuel containing hydrocarbons and high amount of sulphur is burnt with 40% excess air. The flue gas still contains large amount of carbon monoxide. This may be due to the

Lack of thorough mixing of fuel with air

Presence of large quantity of hydrogen in the fuel

High sulphur content in the fuel

Low calorific value of the fuel

Lack of thorough mixing of fuel with air

Presence of large quantity of hydrogen in the fuel

High sulphur content in the fuel

Low calorific value of the fuel

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Fuels and Combustion
For every 10% increase in the excess air; the fuel consumption increases by __________ percent.

5

2

10

0.1

5

2

10

0.1

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Fuels and Combustion
Gray King Assay and Swelling Index of a coal is a measure of its

Swelling characteristics

Resistance to impact breakage

Abradability

Agglutinating properties

Swelling characteristics

Resistance to impact breakage

Abradability

Agglutinating properties

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Fuels and Combustion
Anthracite can be used for

Recarbonising steel

All of these

Making carbon electrodes

Blending with highly coking coal to check its swelling which helps in saving coke even walls from damage and to produce high strength coke

Recarbonising steel

All of these

Making carbon electrodes

Blending with highly coking coal to check its swelling which helps in saving coke even walls from damage and to produce high strength coke

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Fuels and Combustion
Dust content in raw blast furnace gas is about __________ gm/Nm³ , hence it is cleaned to the dust level of about < 10 mg /Nm³ before use.

70-100

15-30

43832

150-200

70-100

15-30

43832

150-200

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Fuels and Combustion
Ash content in the middling coal (a byproduct of coal washeries) in India ranges between __________ percent.

55 to 75

15 to 25

75

35 to 45

55 to 75

15 to 25

75

35 to 45

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Fuels and Combustion

Fuels and Combustion A liquid/gaseous fuel containing hydrocarbons and high amount of sulphur is burnt with 40% excess air. The flue gas still contains large amount of carbon monoxide. This may be due to the

Fuels and Combustion For every 10% increase in the excess air; the fuel consumption increases by __________ percent.

Fuels and Combustion Gray King Assay and Swelling Index of a coal is a measure of its

Fuels and Combustion Anthracite can be used for

Fuels and Combustion Dust content in raw blast furnace gas is about __________ gm/Nm³ , hence it is cleaned to the dust level of about < 10 mg /Nm³ before use.

Fuels and Combustion Ash content in the middling coal (a byproduct of coal washeries) in India ranges between __________ percent.

Fuels and Combustion
A liquid/gaseous fuel containing hydrocarbons and high amount of sulphur is burnt with 40% excess air. The flue gas still contains large amount of carbon monoxide. This may be due to the

Fuels and Combustion
For every 10% increase in the excess air; the fuel consumption increases by __________ percent.

Fuels and Combustion
Gray King Assay and Swelling Index of a coal is a measure of its

Fuels and Combustion
Anthracite can be used for

Fuels and Combustion
Dust content in raw blast furnace gas is about __________ gm/Nm³ , hence it is cleaned to the dust level of about < 10 mg /Nm³ before use.

Fuels and Combustion
Ash content in the middling coal (a byproduct of coal washeries) in India ranges between __________ percent.