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Fuels and Combustion

Fuels and Combustion
Which of the following is not a micro component present in coal?

Fusinite
Liptinite
Micrinite
Clarain

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Fuels and Combustion
With increase in C/H ratio of a fuel, the dew point of flue gases

Decreases
Remains same
May increase or decrease ; depends on the type of fuel
Increases

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Fuels and Combustion
A coal containing high amount of volatile matter will have

Very little ash content
High fusion point of its ash
Low adiabatic flame temperature
Low ignition temperature

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Fuels and Combustion
Hardgrove grindability index of four coal samples are given below. Which of them is the easiest to grind?

50
85
100
70

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Fuels and Combustion
Which of the following is not applicable to fluidised bed combustion of coal?

Less heat transfer surface area is required in boilers
It can not burn low grade coal
None of these
It achieves higher fuel combustion efficiency

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Fuels and Combustion
With increase in C/H ratio of a fuel, the amount of CO₂ formed on its complete combustion

Increases
Remains same
Either A or B, depends on other factors
Decreases

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