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Fuels and Combustion

Fuels and Combustion
Pure carbon is completely burnt in oxygen. The flue gas analysis is 70%CO₂, 20%CO and 10%O₂. The percent excess oxygen used is

12.5
10
20
0

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Fuels and Combustion
Percentage of carbon monoxide in blast furnace gas may be around

14
22
8
52

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

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

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Fuels and Combustion
Which of the following is a lean fuel gas?

Blast furnace gas
Coke oven gas
LPG
Natural gas

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Fuels and Combustion
Correct viscosity of furnace oil at the burner tip for proper atomisation is about 25 centistokes. To reduce the viscosity of high viscosity furnace oil (250 centistokes) to the correct atomisation viscosity (i.e. 25 cst), it should be preheated to about____°C.

70
105
85
145

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Fuels and Combustion
Which of the following oil gasification processes is non-catalytic?

Onia-Gegi process
Steam reforming of naphtha
Semet-Solvay process
Segas process

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