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Fuels and Combustion

Fuels and Combustion
Which of the following is a primary fuel?

Blast furnace coke
Wood charcoal
Gasoline
Natural gas

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Fuels and Combustion
Gasification of the solid fuel converts its organic part into combustible by interaction with air/oxygen and steam so as to obtain a secondary gaseous fuel of high calorific value having no ash. Gasification reactions are normally carried out at about __________ °C.

1400-1500
400-500
1700-1800
900-1000

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Fuels and Combustion
Actual flame temperature is always lower than the adiabatic flame temperature, because there is

Both A & B
Always loss of heat from the flame
No possibility of obtaining complete combustion at high temperature
Neither A nor B

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Fuels and Combustion
Adiabatic flame temperature of a fuel is dependent on the initial temperature of

Air
Both A & B
Neither A nor B
Fuel

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Fuels and Combustion
The temperature at which plastic layer formation takes place during carbonisation of coal varies from __________ °C.

100 to 150
550 to 650
700 to 850
350 to 450

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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)

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