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Fuels and Combustion

Fuels and Combustion
About __________ Nm³ of air will be required for the complete combustion of 2Nm³ of CO.

3
5
1
2

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Fuels and Combustion
(64-132) rank coal (ASTM) means a coal with 64%

Fixed carbon and having a heat value of 13, 200 BTU/1b
Ash and a heating value of 13, 200 BTU/1b
None of these
Fixed carbon and a heating value of 132 BTU/1b

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Fuels and Combustion
Critical Air Blast (CAB) value of coke is a direct measure of its

Hardness
None of these
Strength
Reactivity

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Fuels and Combustion
A coal with high __________ content, would ignite most easily.

Volatile matter
Oxygen
Ash
Fixed carbon

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Fuels and Combustion
Size of blast furnace grade coke is __________ mm.

25-80
0-15
15-25
>100

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Fuels and Combustion
Artificial draught produced by a fan can be controlled by the

Damper
Speed of the fan
All of these
Variation in the pitch of the fan blades

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