Chemical Engineering - Fuels and Combustion

41. 

Incomplete combustion of fuel in the furnace is judged by high __________ of the flue gases.

A. CO content
B. dew point
C. CO2 content
D. O2 content

Answer: Option A

Explanation:

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42. 

Which of the following has the highest theoretical flame temperature ?

A. Blast furnace gas
B. Hydrogen
C. Acetylene
D. Coke oven gas

Answer: Option C

Explanation:

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43. 

Ultimate analysis of coal determines its __________ content.

A. carbon, hydrogen, nitrogen & sulphur.
B. carbon, ash, sulphur & nitrogen.
C. carbon, sulphur, volatile matter & ash.
D. carbon, volatile matter, ash & moisture.

Answer: Option A

Explanation:

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44. 

(64-132) rank coal (ASTM) means a coal with 64%

A. fixed carbon and having a heating value around 13, 200 BTU/1b.
B. ash and heating value around 13, 200 BTU/1b.
C. fixed carbon and heating value around 132 BTU/1b.
D. none of these.

Answer: Option A

Explanation:

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45. 

High sulphur (4-6%) coal in India are found in

A. Assam
B. Andhra Pradesh
C. Bengal
D. Madhya Pradesh

Answer: Option A

Explanation:

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