Chemical Engineering - Fuels and Combustion

26. 

Orsat apparatus

A. gives flue gas analysis on dry basis.
B. determines N2 in flue gas indirectly.
C. can't determine CO in flue gas, if it is < 0.2%.
D. all (a), (b) & (c).

Answer: Option D

Explanation:

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27. 

In flue gas analysis by Orsat's apparatus, carbon dioxide is absorbed by

A. potassium hydroxide.
B. dilute potassium carbonate.
C. cuporus chloride.
D. alkaline pyragllol solution.

Answer: Option A

Explanation:

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28. 

Caking index of the coal blend used for the manufacture of metallurgical coke should be around

A. 5
B. 21
C. 40
D. 48

Answer: Option B

Explanation:

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29. 

With increase in moisture content of coal, its

A. calorific value increases sometimes.
B. bulk density always decreases.
C. clinkering tendency during combustion increases.
D. none of these.

Answer: Option D

Explanation:

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30. 

Proximate analysis of coal determines its __________ content.

A. moisture, ash, sulphur & volatile matter.
B. moisture, volatile matter, ash & fixed carbon.
C. moisture, sulphur, nitrogen & fixed carbon.
D. none of these.

Answer: Option B

Explanation:

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