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Fuels and Combustion

Fuels and Combustion
Pensky-Marten apparatus is used for those oils, whose flash points are __________ °F.

>120
90-110

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Fuels and Combustion
Which will have the least volatile matter and hence will be the most difficult to ignite?

Bituminous coal
Aanthracite
Coke
Semi-bituminous coal

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Fuels and Combustion
One kg of carbon for theoretically complete combustion requires __________ kg of air.

23
12
11.5
0.5

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Fuels and Combustion
Coke having higher porosity has

Lower bulk density
Lower strength
All of these
Higher reactivity

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

20
2.5
10
0.5

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Fuels and Combustion
The main advantage of forced draft over natural draft is that

All of these
Combustion of fuel is complete
Furnace control is easier
Smaller height chimney can be used

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