Chemical Engineering - Fuels and Combustion

21. 

Pick out the correct statement.

A. Oxygen content decreases from lignite to bituminous coal as the coalification increases.
B. The less the oxygen content, better is the coal, as it reduces the calorific value.
C. With increase in oxygen content, moisture holding capacity of coal increases and the caking power decreases.
D. all (a), (b) and (c)

Answer: Option D

Explanation:

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22. 

Which of the following is a single stage, fixed bed high pressure coal gasification process ?

A. Winkler process
B. Kopper-Totzek process
C. Lurgi Process
D. None of these

Answer: Option C

Explanation:

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23. 

Kopper-Totzek coal gasifier (installed in a coal based nitrogeneous fertiliser plant) employs a/an __________ bed gasifier.

A. entrained
B. moving
C. fixed
D. fluidised

Answer: Option A

Explanation:

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24. 

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

A. cuprous chloride
B. potassium hydroxide
C. alkaline pyrogallol solution
D. none of these.

Answer: Option A

Explanation:

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25. 

Gas yield in the Kopper-Totzek coal gasifier is about __________ Nm3/ton coal (ash = 35%).

A. 150
B. 1500
C. 3500
D. 5000

Answer: Option B

Explanation:

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