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

70

105

85

145

70

105

85

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Fuels and Combustion
The function of secondary combustion air is to

Pneumatically convey the pulverised coal

None of these

Completely burn the volatile matter

Burn the lumpy coal

Pneumatically convey the pulverised coal

None of these

Completely burn the volatile matter

Burn the lumpy coal

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Fuels and Combustion
Anthracite coal

Ignites more easily than bituminous coal

Burns with short, bluish, yellow-tipped flame producing very little smoke

Is essentially a coking coal

Contains more volatile matter than bituminous coal

Ignites more easily than bituminous coal

Burns with short, bluish, yellow-tipped flame producing very little smoke

Is essentially a coking coal

Contains more volatile matter than bituminous coal

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Fuels and Combustion
High sulphur content in a fuel __________ of the flue gases.

Increases the dew point

Decreases the dew point

Reduces the combustion efficiency by limiting the permissible temperature reduction

Both B & C

Increases the dew point

Decreases the dew point

Reduces the combustion efficiency by limiting the permissible temperature reduction

Both B & C

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Fuels and Combustion
Coal is heated in absence of air for 7 minutes at a temperature of about __________ °C, during its volatile matter determination for proximate analysis.

950

550

750

1150

950

550

750

1150

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Fuels and Combustion
Yield of blast furnace gas is about __________ Nm³ /ton of pig iron.

2000

5000

300

10000

2000

5000

300

10000

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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 The function of secondary combustion air is to

Fuels and Combustion Anthracite coal

Fuels and Combustion High sulphur content in a fuel __________ of the flue gases.

Fuels and Combustion Coal is heated in absence of air for 7 minutes at a temperature of about __________ °C, during its volatile matter determination for proximate analysis.

Fuels and Combustion Yield of blast furnace gas is about __________ Nm³ /ton of pig iron.

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
The function of secondary combustion air is to

Fuels and Combustion
Anthracite coal

Fuels and Combustion
High sulphur content in a fuel __________ of the flue gases.

Fuels and Combustion
Coal is heated in absence of air for 7 minutes at a temperature of about __________ °C, during its volatile matter determination for proximate analysis.

Fuels and Combustion
Yield of blast furnace gas is about __________ Nm³ /ton of pig iron.