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Fuels and Combustion

Fuels and Combustion
Mineral matter content (M) and ash content (A) in coal are approximately related as

M = 2A
M = 1.1A
M = A
M = 1.5A

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Fuels and Combustion
Fossil fuels mean

Premature fuels with low calorific value
Solid fuels
Those fuels which are found in the crust of earth
Liquid fuels

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

90-110
>120

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Fuels and Combustion
The cooling medium used in dry quenching of coke is

Nitrogen
Air
Phenolic water
Carbon dioxide

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

300-600
>280
>120

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Fuels and Combustion
Coal is heated in presence of air to a temperature of about __________ °C, while determining its ash content for proximate analysis.

1100
950
500
750

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