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Fuels and Combustion

Fuels and Combustion
A good quality coal should have

High ash content
High sulphur
None of these
Low fusion point of ash

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Fuels and Combustion
A particular coal is said to be free burning when it

Gives smokeless burning
Burns completely
None of these
Shows little or no fusing action

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Fuels and Combustion
Gas yield in the Kopper-Totzek coal gasifier is about __________ Nm³/ton coal (ash = 35%).

150
5000
1500
3500

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Fuels and Combustion
Carbon Content by weight in air dried wood may be about __________ percent.

50
10
80
25

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Fuels and Combustion
Caking coal is desirable for

Burning on travelling grate
All of these
Coke making
Burning on firebars

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Fuels and Combustion
C/H ratio is the maximum in case of

Naphtha
Natural gas
Furnace oil
Coal

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