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Fuels and Combustion

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

Exothermic
Catalytic
Autocatalytic
Endothermic

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Fuels and Combustion
In flue gas analysis by Orsat's apparatus, carbon dioxide is absorbed by

Dilute potassium carbonate
Cuporus chloride
Alkaline pyragllol solution
Potassium hydroxide

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Fuels and Combustion
In low temperature carbonisation of coal, the

Volatile matter in coke is zero
Yield of tar is about 3% of dry coal
Yield of coke oven gas is 290 Nm³ /ton dry coal
Temperature maintained is 700°C

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Fuels and Combustion
Out of the following fuels, the difference between the net and gross calorific value is maximum in case of

Blast furnace gas
Pitch
Fuel oil
Bituminous coal

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Fuels and Combustion
Height of coke oven is limited (say maximum upto 7 metres) mainly by the

Structural strength of silica bricks
Buckling of ram of pusher car at the time of coke pushing
Problem of uniform heating along its height
Problem in door cleaning

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Fuels and Combustion
Preheating of __________ the flame temperature.

The gaseous fuel before combustion decreases
Either the fuel or the air does not affect
Either the fuel or the air or both, increases
Combustion air decreases

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