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Fuels and Combustion

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

Refinery gas
Blast furnace gas
Converter gas
Gobar gas

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Fuels and Combustion
Blast furnace gas burns with a bluish flame, because of the presence of

CO₂
CO
S
CH₄

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Fuels and Combustion
Blast furnace gas compared to coke oven gas has

Lower theoretical flame temperature
Narrower limit of inflammability
Lower ignition temperature
Higher calorific value

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Fuels and Combustion
Which of the following is the most reactive (as regards the formation of CO + H₂ from C + H₂O) ?

Sub-bituminous coal
Blast furnace coke
Anthracite coal
Low temperature coke

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Fuels and Combustion
Natural draught produced by a chimney depends upon the

Both A & B
Neither A nor B
Density of the chimney gases
Height of the chimney

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Fuels and Combustion
Which of the following fuels is generally not used in thermal power plant boiler firing?

Coal middling from washeries
Furnace oil, light diesel oil and tar/PCM
F. gas, coke oven gas and L.D. converter gas
Pulverised coking coal

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