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Fuels and Combustion

Fuels and Combustion
Size of blast furnace grade coke is __________ mm.

0-15
25-80
>100
15-25

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Fuels and Combustion
KOH solution used in orsat apparatus absorbs

Both A & B
CO₂
Neither A nor B
SO₂

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Fuels and Combustion
Which of the following is not a by-product fuel?

Pitch
Petrol
Blast furnace gas
Refinery gas

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Fuels and Combustion
During coking of coal, the ash content (percentage)

Decreases
Remains constant
Increases
None of these

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Fuels and Combustion
Height of coke oven is limited (say maximum upto 7 metres) mainly by the

Structural strength of silica bricks
Problem in door cleaning
Problem of uniform heating along its height
Buckling of ram of pusher car at the time of coke pushing

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Fuels and Combustion
Assam coals suffers mainly from the disadvantage of high __________ content.

Volatile matter
Moisture
Ash
Sulphur (4-6%)

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