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Fuels and Combustion

Fuels and Combustion
By-products are __________ recovered in 'Beehive ovens'.

Not at all
Partially
Fully
Negligibly

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

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

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Fuels and Combustion
Which of the following is not endothermic?

Partial oxidation
Cracking
Gasification
Reforming

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Fuels and Combustion
The internal energy of the combustion products is __________ compared to that of reactants.

Less
More or less ; (depends on the state of fuel.)
More
Equal

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Fuels and Combustion
Bomb calorimeter can be used to determine the __________ of the coal.

Neither A nor B
Calorific value
Both A & B
Sulphur content

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Fuels and Combustion
Stack heat losses can be minimised by

Using low c.v. fuels
Controlling the excess air
Oxygen enrichment of combustion air
Maintaining proper draft in the furnace

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