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Fuels and Combustion

Fuels and Combustion
Which of the following is not endothermic?

Reforming
Gasification
Cracking
Partial oxidation

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Fuels and Combustion
The calorific value of 'LPG' (50% propane + 50% butane) is about __________ kcal/Nm³.

15, 000
10, 000
5000
25, 000

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

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

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Fuels and Combustion
Volumetric ratio of N₂ to O₂ in dry atmospheric air is

4.76
0.79
0.21
3.76

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Fuels and Combustion
'Fat coals' are those coals which have very high

Fusion point of its ash
Volatile matter content
Caking capacity
Inherent moisture content

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Fuels and Combustion
Advantages of fluidised bed combustion are

All of these
Lower furnace operating temperature
High heat transfer rate
Reduced NOx formation in flue gas

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