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Fuels and Combustion

Fuels and Combustion
Bulk density of pulverised coal may be about __________ kg/m³.

500
1500
1000
100

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Fuels and Combustion
Too much of excess air in combustion results in high

Fuel consumption for the same heat load
Percentage of oxygen in flue gases
Stack gas temperature
All of these

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Fuels and Combustion
Turndown ratio of a gas burner is equal to the

Minimum to maximum heat input ratio
Both A & B
Maximum to minimum permissible gas flow rate
Maximum to minimum heat input ratio

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

Winkler process
Kopper-Totzek process
Lurgi Process
None of these

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Fuels and Combustion
Coke ovens in steel plant are heated by

Electricity
Mixed gas
Both B & C
Coke oven gas

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Fuels and Combustion
Which of the following has the highest heat of combustion?

CH₄
CO
H₂
C₂H₆

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