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A coal gasifier opearating at 20 atm. (e.g. Lugri gasifier) as compared to one operating at atmospheric pressure (e.g. Kopper-Totzek or Winkler gasifier) will produce a gas having

CHEMICAL ENGINEERING, Fuels and Combustion /
Question: A coal gasifier opearating at 20 atm. (e.g. Lugri gasifier) as compared to one operating at atmospheric pressure (e.g. Kopper-Totzek or Winkler gasifier) will produce a gas having
[A].

higher methane content and thus higher calorific value.

[B].

higher carbon monoxide content.

[C].

lower carbon dioxide content.

[D].

none of these.

Answer: Option A

Explanation:

No answer description available for this question.

A coal gasifier opearating at 20 atm. (e.g. Lugri gasifier) as compared to one operating at atmospheric pressure (e.g. Kopper-Totzek or Winkler gasifier) will produce a gas having Read More »

CHEMICAL ENGINEERING, Fuels and Combustion

A liquid/gaseous fuel containing hydrocarbons and high amount of sulphur is burnt with 40% excess air. The flue gas still contains large amount of carbon monoxide. This may be due to the

CHEMICAL ENGINEERING, Fuels and Combustion /
Question: A liquid/gaseous fuel containing hydrocarbons and high amount of sulphur is burnt with 40% excess air. The flue gas still contains large amount of carbon monoxide. This may be due to the
[A].

presence of large quantity of hydrogen in the fuel.

[B].

low calorific value of the fuel.

[C].

high sulphur content in the fuel.

[D].

lack of thorough mixing of fuel with air.

Answer: Option D

Explanation:

No answer description available for this question.

A liquid/gaseous fuel containing hydrocarbons and high amount of sulphur is burnt with 40% excess air. The flue gas still contains large amount of carbon monoxide. This may be due to the Read More »

CHEMICAL ENGINEERING, Fuels and Combustion

Net calorific value is the gross calorific value less the __________ heat of water in the product of combustion when cooled to 15°C.

CHEMICAL ENGINEERING, Fuels and Combustion /
Question: Net calorific value is the gross calorific value less the __________ heat of water in the product of combustion when cooled to 15°C.
[A].

sensible

[B].

latent

[C].

sensible and latent

[D].

none of these

Answer: Option C

Explanation:

No answer description available for this question.

Net calorific value is the gross calorific value less the __________ heat of water in the product of combustion when cooled to 15°C. Read More »

CHEMICAL ENGINEERING, Fuels and Combustion

Initial pressure of oxygen introduced into the ‘bomb’ of the bomb calorimeter for determination of calorific value of coal/fuel oil may be around __________ atm.

CHEMICAL ENGINEERING, Fuels and Combustion /
Question: Initial pressure of oxygen introduced into the ‘bomb’ of the bomb calorimeter for determination of calorific value of coal/fuel oil may be around __________ atm.
[A].

3-5

[B].

25-30

[C].

60-65

[D].

95-100

Answer: Option B

Explanation:

No answer description available for this question.

Initial pressure of oxygen introduced into the ‘bomb’ of the bomb calorimeter for determination of calorific value of coal/fuel oil may be around __________ atm. Read More »

CHEMICAL ENGINEERING, Fuels and Combustion

The average molecular weight of a flue gas having the composition by volume as CO2 = 25%, O2 = 25%, N2 = 50% will be

CHEMICAL ENGINEERING, Fuels and Combustion /
Question: The average molecular weight of a flue gas having the composition by volume as CO2 = 25%, O2 = 25%, N2 = 50% will be
[A].

27.6

[B].

23

[C].

47.3

[D].

42.9

Answer: Option B

Explanation:

No answer description available for this question.

The average molecular weight of a flue gas having the composition by volume as CO2 = 25%, O2 = 25%, N2 = 50% will be Read More »

CHEMICAL ENGINEERING, Fuels and Combustion