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Fuels and Combustion

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

Toluene
Pyridine
Cerosote
Benzol

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Fuels and Combustion
During coking of coal, the ash content (percentage)

Remains constant
Decreases
None of these
Increases

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Fuels and Combustion
Deficiency of combustion air during combustion of a gaseous fuel

Shortens the flame
Lengthens the flame
Both A & B
Causes heat loss of fuel by its partial combustion

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Fuels and Combustion
Coal is heated in absence of air for 7 minutes at a temperature of about __________ °C, during its volatile matter determination for proximate analysis.

1150
750
950
550

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

H₂
CH₄
C₂H₆
CO

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Fuels and Combustion
Incomplete combustion of a fuel is characterised by the high __________ in the flue gas.

Oxygen
Smoke
Carbon monoxide
Temperature

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