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Fuels and Combustion

Fuels and Combustion
Which of the following combustibles is absent in blast furnace gas?

None of these
H₂
CH₄
CO

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Fuels and Combustion
Ignition temperature of a fuel in air is __________ that in pure oxygen.

Either more or less; depends on the type of fuel
More than
Less than
Equal to

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Fuels and Combustion
Higher efficiency in the combustion of solid fuel can not be achieved by

Supplying correct quantity of combustion air
Proper fuel preparation
Keeping the flue gas exhaust temperature very high
Adopting efficient-fuel firing technique & equipment

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Fuels and Combustion
While the first commercial low temperature coal carbonisation plant is located at Neyveli (in Chennai), the second such plant has been built at

Raniganj
Singreni (AP.)
Dankuni (West Bengal)
Dhanbad

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Fuels and Combustion
The gasification reaction represented by, C + H₂O = CO + H₂, is

Autocatalytic
Catalytic
Exothermic
Endothermic

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Fuels and Combustion
Advantages of fluidised bed combustion are

Reduced NOx formation in flue gas
High heat transfer rate
Lower furnace operating temperature
All of these

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