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Fuels and Combustion

Fuels and Combustion
Abrasion index of blast furnace coke should be around __________ percent.

55
20
80
35

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Fuels and Combustion
Atomising steam to fuel oil ratio in a burner should be around

2.5
3.5
1.5
0.5

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Fuels and Combustion
A sooty flame can be made non-luminous by

Admitting more air
Admitting more gas
Shutting gas supply
Shutting air supply

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Fuels and Combustion
Stack (chimney) height in a big thermal power plant is dictated by the

Pollution control aspect
None of these
Limitation of constructional facilities
Draught to be created

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Fuels and Combustion
Yield of blast furnace gas is about __________ Nm³ /ton of pig iron.

10000
300
2000
5000

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Fuels and Combustion
High sulphur content in a fuel __________ of the flue gases.

Increases the dew point
Reduces the combustion efficiency by limiting the permissible temperature reduction
Both B & C
Decreases the dew point

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