Chemical Engineering - Fuels and Combustion

1. 

The reaction, C + CO2 2CO, taking place during coal gasification is called the __________ reaction.

A. Neumann reversal
B. shift conversion
C. Boudouard
D. reduction

Answer: Option C

Explanation:

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2. 

The maximum percentage of CO2 in a flue gas (from a carbonaceous fuel) can be

A. 21
B. 77
C. 79
D. 29

Answer: Option A

Explanation:

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3. 

A good quality coal should have

A. low fusion point of ash
B. high ash content
C. high sulphur
D. none of these

Answer: Option D

Explanation:

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4. 

High amount of sulphur and phosphorous in coke causes

A. decrease in its calorific value.
B. increase in its strength.
C. brittleness of steel made by using it.
D. none of these.

Answer: Option C

Explanation:

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5. 

The difference between total carbon and fixed carbon of coal will be minimum in case of

A. lignite
B. bituminous coal
C. anthracite
D. high temperature coke (V.M < 0.5%)

Answer: Option D

Explanation:

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