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Fuels and Combustion

Fuels and Combustion
Which of the following petrographic constituents of coal is non-coking?

Clarain
Fussain
Durain
Vitrain

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Fuels and Combustion
Which of the following fuel gases is heavier than air?

Coke oven gas
Water gas
Natural gas
Blast furnace gas

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Fuels and Combustion
Which of the following will be unsuitable for dust cleaning from flue gas at 400°C from a pulverised coal fired boiler ?

Wet scrubber
Multicyclones
Bag filter
Hydrocyclones

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Fuels and Combustion
Ionisation potential applied across the electrodes of electrostatic tar precipitator is around

230 V AC
60 KV DC
60 KV AC
230 V DC

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Fuels and Combustion
Which of the following gaseous fuels has the lowest calorific value?

Gobar gas
Converter gas
Blast furnace gas
Refinery gas

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Fuels and Combustion
Gross calorific value will be equal to the net calorific value for

C₂H₆
CO
C₂H₂
H₂

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