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.

105

70

145

85

105

70

145

85

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Fuels and Combustion
The maximum adiabatic flame temperature in air as compared to that in pure oxygen is

Much higher

Much lower

Same

Either lower or higher, depends on the type of fuel

Much higher

Much lower

Same

Either lower or higher, depends on the type of fuel

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Fuels and Combustion
__________ has the widest inflammability limit (explosion limit) of all the gases.

Acetylene

Methane

Carbon monoxide

Hydrogen

Acetylene

Methane

Carbon monoxide

Hydrogen

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Fuels and Combustion
Which of the following is not a by-product recovered in a high temperature coal carbonisation plant?

Benzol

Ethylene

Napthalene

Pitch-cresosote mixture (PCM)

Benzol

Ethylene

Napthalene

Pitch-cresosote mixture (PCM)

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Fuels and Combustion
Beehive coke oven

Facilitates by-products recovery

Takes 2-3 days for coking of coal but requires no external fuel for heating

Produces coke with very poor strength

Gives larger yield of coke (around 85%) as compared to by-product ovens

Facilitates by-products recovery

Takes 2-3 days for coking of coal but requires no external fuel for heating

Produces coke with very poor strength

Gives larger yield of coke (around 85%) as compared to by-product ovens

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Fuels and Combustion
Bituminous coal

Both B and C

Burns with smoky yellow flame

Ignites less easily than anthracite

Is generally coking

Both B and C

Burns with smoky yellow flame

Ignites less easily than anthracite

Is generally coking

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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 maximum adiabatic flame temperature in air as compared to that in pure oxygen is

Fuels and Combustion __________ has the widest inflammability limit (explosion limit) of all the gases.

Fuels and Combustion Which of the following is not a by-product recovered in a high temperature coal carbonisation plant?

Fuels and Combustion Beehive coke oven

Fuels and Combustion Bituminous coal

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 maximum adiabatic flame temperature in air as compared to that in pure oxygen is

Fuels and Combustion
__________ has the widest inflammability limit (explosion limit) of all the gases.

Fuels and Combustion
Which of the following is not a by-product recovered in a high temperature coal carbonisation plant?

Fuels and Combustion
Beehive coke oven

Fuels and Combustion
Bituminous coal