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Fuels and Combustion

Fuels and Combustion
Which of the following is the most poisonous gas?

Blast furnace gas
Producer gas
Coke oven gas
L.D. converter gas

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Fuels and Combustion
As the C/H ratio of the fuel increases, the amount of CO₂ formed on combustion __________ for the same percentage of excess air.

Increases
Remains same
May increase or decrease depending on the type of fuel
Decreases

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Fuels and Combustion
High temperature in gasification of coal favours

High production of CO₂
High production of CO
Low production of CO₂
Both B and C

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

1500
500
1000
100

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Fuels and Combustion
Lurgi gasifier (high pressure gasifier) as compared to Kopper Totzek gasifier (atmospheric pressure gasifier) produces

Higher amount of both methane and hydrogen
Both A & B
Higher amount of methane
Lower amount of hydrogen

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

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

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