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Fuels and Combustion

Fuels and Combustion
Which of the following has the highest flame velocity?

CH₄
H₂
CO
C₂H₆

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Fuels and Combustion
Ignition temperature of a fuel in air is __________ that in pure oxygen.

Less than
Equal to
More than
Either more or less; depends on the type of fuel

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Fuels and Combustion
Fossil fuels mean

Premature fuels with low calorific value
Those fuels which are found in the crust of earth
Liquid fuels
Solid fuels

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Fuels and Combustion
Nitrogen in coal

Comes from protein in parent vegetable matter
Is recovered as ammonia during its carbonisation
Is present upto 1-2%
All of these

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Fuels and Combustion
Temperature of coke oven gas just before entering into saturator (for recovery of NH₃) is about __________ °C.

65
30
180
120

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Fuels and Combustion
Which of the following is used for making the explosive 'TNT'?

Toluene
Cerosote
Pyridine
Benzol

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