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Fuels and Combustion

Fuels and Combustion
One kg of carbon for theoretically complete combustion requires __________ kg of air.

11.5
23
12
0.5

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Fuels and Combustion
Main constituents of benzol are

Ammonia & phenol
Tar & creosote
Benzene, toluene & xylene
Anthracene & phenol

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Fuels and Combustion
To avoid fire by spontaneous combustion of coal due to its low temperature oxidation, it should be stored in

Closed space without any ventilation facility
Large heaps with small surface to volume ratio
Shallow and small piles
Fine sizes without the presence of any lump

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Fuels and Combustion
Efficient burning of anthracite coal requires

High excess air
All of these
Low preheat of air
Fine grinding

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Fuels and Combustion
For maximum discharge through a chimney, its height should be

200 meters
Equal to the height of the hot gas column producing draught
Infinitely long
More than 105.7 metres

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Fuels and Combustion
Which of the following is a single stage, fixed bed high pressure coal gasification process?

Lurgi Process
Winkler process
None of these
Kopper-Totzek process

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