Chemical Engineering - Fuels and Combustion

11. 

Oxygen required for theoretically complete combustion of 1 Nm3 methane is __________ Nm3.

A. 2
B. 4
C. 6
D. 1

Answer: Option A

Explanation:

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12. 

Bomb calorimeter is used for the determination of calorific value of the __________ fuels.

A. gaseous
B. solid
C. liquid
D. both (b) and (c)

Answer: Option D

Explanation:

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13. 

As the C/H ratio of the fuel increases, the amount of CO2 formed on combustion __________ for the same percentage of excess air.

A. decreases
B. increases
C. remains same
D. may increase or decrease depending on the type of fuel

Answer: Option B

Explanation:

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14. 

Which of the following fuel gases has the highest calorific value ?

A. Natural gas.
B. Coal bed methane (CBM).
C. Liquefied petroleum gas (LPG).
D. Sewage gas.

Answer: Option C

Explanation:

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15. 

Calorific value as determined by bomb calorimeter is the

A. higher calorific value at constant volume.
B. gross calorific value at constant pressure.
C. lower calorific value at constant pressure.
D. net calorific value at constant volume.

Answer: Option A

Explanation:

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