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Fuels and Combustion

Fuels and Combustion
The calorific value is the highest out of the following for

Producer gas
Blast furnace gas
Water gas
Coke oven gas

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Fuels and Combustion
(64-132) rank coal (ASTM) means a coal with 64%

None of these
Ash and a heating value of 13, 200 BTU/1b
Fixed carbon and a heating value of 132 BTU/1b
Fixed carbon and having a heat value of 13, 200 BTU/1b

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

CO₂
S
CO
CH₄

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

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

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Fuels and Combustion
Low temperature oxidation of coal is accelerated by the

All of these
Storage in large heaps
Storage in compressed piles
Absence of porous or friable particles

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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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