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Fuels and Combustion

Fuels and Combustion
Flue gas obtained on complete combustion of pure acetylene (a hydrocarbon fuel) will contain

CO
Both B & C
CO₂
H₂O

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Fuels and Combustion
Presence of __________ in a dry gaseous fuel does not contribute to its calorific value.

Sulphur
Carbon
Oxygen
Hydrogen

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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
For long flame and easy ignition, the coal used should have

High calorific value
High ash
High volatile matter
Low ash

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Fuels and Combustion
Calorific values of both the solid as well as the liquid fuels can be determined by __________ calorimeter.

Boy's
None of these
Junkar's
Bomb

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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

10
12.5
20
0

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