Correct viscosity of furnace oil at the burner tip for proper atomisation is about 25 centistokes. To reduce the viscosity of high viscosity furnace oil (250 centistokes) to the correct atomisation viscosity (i.e. 25 cst), it should be preheated to about____°C.

Fuels and Combustion
Correct viscosity of furnace oil at the burner tip for proper atomisation is about 25 centistokes. To reduce the viscosity of high viscosity furnace oil (250 centistokes) to the correct atomisation viscosity (i.e. 25 cst), it should be preheated to about____°C.

145

105

85

70

145

105

85

70

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Fuels and Combustion
Main use of hard coke produced by high temperature carbonisation is in the

Iron blast furnace

Domestic ovens

Cupola in foundaries

Sinter making

Iron blast furnace

Domestic ovens

Cupola in foundaries

Sinter making

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Fuels and Combustion
A particular coal is said to be free burning when it

Shows little or no fusing action

Burns completely

None of these

Gives smokeless burning

Shows little or no fusing action

Burns completely

None of these

Gives smokeless burning

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Fuels and Combustion
Which of the following constituents of coal is the most important in the production of coke?

Moisture

Volatiles

Ash

Carbon

Moisture

Volatiles

Ash

Carbon

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Fuels and Combustion
Fusion point of coal ash generally varies from 1000 to 1700° C. Ash having fusion point less than __________ °C is liable to form clinker.

1400

1100

1250

1350

1400

1100

1250

1350

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Fuels and Combustion
Froth floatation is used for

Washing lump coal (> 80 mm size)

Removing ash from the coal based on difference in specific gravity of coal and ash

All of these

Washing fine coal dust (< 0.5 mm size)

Washing lump coal (> 80 mm size)

Removing ash from the coal based on difference in specific gravity of coal and ash

All of these

Washing fine coal dust (< 0.5 mm size)

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Fuels and Combustion

Fuels and Combustion Correct viscosity of furnace oil at the burner tip for proper atomisation is about 25 centistokes. To reduce the viscosity of high viscosity furnace oil (250 centistokes) to the correct atomisation viscosity (i.e. 25 cst), it should be preheated to about____°C.

Fuels and Combustion Main use of hard coke produced by high temperature carbonisation is in the

Fuels and Combustion A particular coal is said to be free burning when it

Fuels and Combustion Which of the following constituents of coal is the most important in the production of coke?

Fuels and Combustion Fusion point of coal ash generally varies from 1000 to 1700° C. Ash having fusion point less than __________ °C is liable to form clinker.

Fuels and Combustion Froth floatation is used for

Fuels and Combustion
Correct viscosity of furnace oil at the burner tip for proper atomisation is about 25 centistokes. To reduce the viscosity of high viscosity furnace oil (250 centistokes) to the correct atomisation viscosity (i.e. 25 cst), it should be preheated to about____°C.

Fuels and Combustion
Main use of hard coke produced by high temperature carbonisation is in the

Fuels and Combustion
A particular coal is said to be free burning when it

Fuels and Combustion
Which of the following constituents of coal is the most important in the production of coke?

Fuels and Combustion
Fusion point of coal ash generally varies from 1000 to 1700° C. Ash having fusion point less than __________ °C is liable to form clinker.

Fuels and Combustion
Froth floatation is used for