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Fuels and Combustion

Fuels and Combustion
Volumetric ratio of N₂ to O₂ in dry atmospheric air is

0.79
0.21
3.76
4.76

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Fuels and Combustion
Gobar gas is produced by the __________ of cown dung.

Fermentation
None of these
Oxidation
Hydrogenation

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Fuels and Combustion
A travelling grate stoker is meant for the efficient burning of __________ coal.

Non-caking
Pulverised
Caking
High ash

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Fuels and Combustion
For long flame and easy ignition, the coal used should have

High calorific value
Low ash
High volatile matter
High ash

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Fuels and Combustion
In high temperature carbonisation (as compared to low temperature carbonisation) of coal

All of these
Calorific value of coke oven gas is less
Tar yield is less but free carbon in tar is more
Coke oven gas yield is more

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

Lurgi Process
None of these
Winkler process
Kopper-Totzek process

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