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

85

105

145

70

85

105

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Fuels and Combustion
Cannel coal

Is a non-banded coal which can be ignited easily with a match stick or candle flame, hence is so named

Is non-coking

All of these

Has a high volatile matter content and burns with a luminous smoky flame

Is a non-banded coal which can be ignited easily with a match stick or candle flame, hence is so named

Is non-coking

All of these

Has a high volatile matter content and burns with a luminous smoky flame

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Fuels and Combustion
Dry air requirement for burning 1 Nm³ of CO to CO₂ may be around __________ Nm³.

0.87

2.4

11.4

1.75

0.87

2.4

11.4

1.75

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Fuels and Combustion
Pick out the wrong statement.

Regulation of furnace temperature and atmosphere (oxidising or reducing) is easily possible with pulverised fuel firing

None of these

Low grade coal can be used, but generally high volatile matter coals are more suitable for making pulverised fuel

Pulverised fuel can be completely burnt with less percentage of excess air compared to lump coal

Regulation of furnace temperature and atmosphere (oxidising or reducing) is easily possible with pulverised fuel firing

None of these

Low grade coal can be used, but generally high volatile matter coals are more suitable for making pulverised fuel

Pulverised fuel can be completely burnt with less percentage of excess air compared to lump coal

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Fuels and Combustion
Calorific value of pitch creosote mixture (PCM) i.e., C.T.F.-200 is about

8800 kcal/kg

25000 kcal/kg

Same as that of coal middling

8800 kcal/m³

8800 kcal/kg

25000 kcal/kg

Same as that of coal middling

8800 kcal/m³

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Fuels and Combustion
Benzene is used

As a motor fuel

As a perfume

As an explosive

For making insecticides (e.g., DDT, BHC etc.), detergent & rubber (SBR)

As a motor fuel

As a perfume

As an explosive

For making insecticides (e.g., DDT, BHC etc.), detergent & rubber (SBR)

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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 Cannel coal

Fuels and Combustion Dry air requirement for burning 1 Nm³ of CO to CO₂ may be around __________ Nm³.

Fuels and Combustion Pick out the wrong statement.

Fuels and Combustion Calorific value of pitch creosote mixture (PCM) i.e., C.T.F.-200 is about

Fuels and Combustion Benzene is used

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
Cannel coal

Fuels and Combustion
Dry air requirement for burning 1 Nm³ of CO to CO₂ may be around __________ Nm³.

Fuels and Combustion
Pick out the wrong statement.

Fuels and Combustion
Calorific value of pitch creosote mixture (PCM) i.e., C.T.F.-200 is about

Fuels and Combustion
Benzene is used