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Fuels and Combustion

Fuels and Combustion
Percentage of hydrogen in coke oven gas may be around

60
10
45
25

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Fuels and Combustion
The internal energy of the combustion products is __________ compared to that of reactants.

More
More or less ; (depends on the state of fuel.)
Equal
Less

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Fuels and Combustion
Hard coke is manufactured from

Anthracite
Lignite
Bituminous coal
Semi-anthracite

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

5
2
3
1

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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
100
85
70

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Fuels and Combustion
Atomising steam to fuel oil ratio in a burner should be around

2.5
0.5
3.5
1.5

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