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Fuels and Combustion

Fuels and Combustion
Heat penetration rate in narrow coke ovens in high temperature carbonisation of coal is around __________ cm/hr.

10
20
2.5
0.5

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Fuels and Combustion
The temperature at which plastic layer formation takes place during carbonisation of coal varies from __________ °C.

350 to 450
100 to 150
700 to 850
550 to 650

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Fuels and Combustion
Yield of coke oven gas in low temperature carbonisation of coal is about __________ Nm³ /ton of dry coal.

160
500
60
750

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Fuels and Combustion
Which of the following petrographic constituents of coal is non-coking?

Vitrain
Fussain
Durain
Clarain

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Fuels and Combustion
Main use of hard coke produced by high temperature carbonisation is in the

Cupola in foundaries
Domestic ovens
Sinter making
Iron blast furnace

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

3.5
2.5
1.5
0.5

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