Chemical Engineering - Fuels and Combustion

46. 

Which of the following is not applicable to fluidised bed combustion of coal ?

A. It can not burn low grade coal.
B. It achieves higher fuel combustion efficiency.
C. Less heat transfer surface area is required in boilers.
D. None of these.

Answer: Option A

Explanation:

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47. 

Coal containing large quantity of __________ are difficult to wash.

A. ash
B. inherent mineral matter
C. free impurities
D. volatile matter

Answer: Option B

Explanation:

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48. 

Which of the following is not a micro component present in coal ?

A. Micrinite
B. Clarain
C. Fusinite
D. Liptinite

Answer: Option B

Explanation:

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49. 

Calorific values of both the solid as well as the liquid fuels can be determined by __________ calorimeter.

A. bomb
B. Boy's
C. Junkar's
D. none of these

Answer: Option A

Explanation:

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50. 

A coal containing high amount of volatile matter will have

A. low ignition temperature
B. very little ash content
C. high fusion point of its ash
D. low adiabatic flame temperature

Answer: Option A

Explanation:

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