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Fuels and Combustion

Fuels and Combustion
Calorific value of coke oven gas is around __________ Kcal/Nm³.

2000
7500
900
4200

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Fuels and Combustion
Which of the following is called "blue gas"?

Coke oven gas
Water gas
Producer gas
Natural gas

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

25, 000
5000
10, 000
15, 000

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Fuels and Combustion
During combustion of a gaseous fuel, the presence of a non-luminous flame is an indication of the

Complete combustion
None of these
High oxygen in flue gas
Incomplete combustion

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

15-25
25-80
0-15
>100

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Fuels and Combustion
Deficiency of combustion air during combustion of a gaseous fuel

Lengthens the flame
Shortens the flame
Causes heat loss of fuel by its partial combustion
Both A & B

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