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Fuels and Combustion

Fuels and Combustion
The maximum adiabatic flame temperature in air is __________ the maximum flame temperature in pure oxygen.

Not related to
Same as
Lower than
Higher than

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Fuels and Combustion
The average molecular weight of a flue gas having the composition by volume as CO₂ = 25%, O₂ = 25%, N₂ = 50% will be

42.9
27.6
47.3
23

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Fuels and Combustion
In low temperature carbonisation of coal as compared to high temperature carbonisation __________ produced is less.

Free carbon content in tar
Difference in gross & net calorific value of the coke oven gas
Yield percentage of coke
Yield of ammonia present in coke oven gas

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Fuels and Combustion
Degree of carbonisation of coal during coke making can be roughly judged by the __________ of the coke produced.

Colour
Volatile matter
Ash content
Moisture content

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Fuels and Combustion
The main reason for making the copper calorimeter (used in bomb calorimeter) silvery white and shining/polished is to

Minimise its corrosion
None of these
Avoid radiation heat loss
Make it look attractive

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Fuels and Combustion
Which of the following is not a manufactured fuel ?

Kerosene
Bagasse
Furnace oil
Semi-coke

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