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Fuels and Combustion

Fuels and Combustion
Which of the following fuels is the best for burning on chain grate stoker?

Coking coal
Pulverised coal
Non-caking coal
Caking coal

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Fuels and Combustion
Abel apparatus is used for those oils, whose flash points are___°F.

>120
300-600
>280

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Fuels and Combustion
Which of the following has the highest calorific value (kcal/Nm³) ?

Gobar gas
Natural gas
Carburetted water gas
LPG

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Fuels and Combustion
Low temperature oxidation of stored coal results in the

Decrease in its caking power & calorific value
All of these
Decrease in its carbon & hydrogen content
Increase in its oxygen content

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Fuels and Combustion
Gasification of the solid fuel converts its organic part into combustible by interaction with air/oxygen and steam so as to obtain a secondary gaseous fuel of high calorific value having no ash. Gasification reactions are normally carried out at about __________ °C.

400-500
900-1000
1400-1500
1700-1800

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

50
80
25
10

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