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Fuels and Combustion

Fuels and Combustion
Pure carbon is completely burnt in oxygen. The flue gas analysis is 70%CO₂, 20%CO and 10%O₂. The percent excess oxygen used is

0
10
12.5
20

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Fuels and Combustion
Width of the coke oven towards coke side is slightly more than that on pusher side to

Facilitate uniform heating of the oven
Facilitate easy discharging of coke as it swells during carbonisation
Increase the output of the coke
None of these

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Fuels and Combustion
Which of the following is not a product of tar distillation?

Phenol & naphthalene
None of these
Benzol & pitch
Anthracene & creosote

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Fuels and Combustion
Which of the following is not a binder for coal briquetting?

Molasses
None of these
Coal tar
Bitumen

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Fuels and Combustion
Oxygen percentage (by weight) in atmospheric air is

23
21
19
29

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Fuels and Combustion
Natural draft created by the chimney depends upon

Its height
Temperature of the flue gas
Neither A nor B
Both A & B

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