Chemical Engineering - Fuels and Combustion

46. 

Pulverised coal used in boiler firing need not have

A. less moisture content
B. high fusion point of its ash
C. high bulk density
D. lower ash content

Answer: Option B

Explanation:

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47. 

Lurgi coal gasifier is a pressurised __________ bed reactor.

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

Answer: Option A

Explanation:

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48. 

Which is the most matured coal ?

A. Lignite
B. Bituminous
C. Semi-anthracite
D. Anthracite

Answer: Option D

Explanation:

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49. 

The average molecular weight of a flue gas having the composition by volume as CO2 = 25%, O2 = 25%, N2 = 50% will be

A. 27.6
B. 23
C. 47.3
D. 42.9

Answer: Option B

Explanation:

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50. 

Caking index of coal blend used for blast furnace coke making is about

A. 8
B. 12
C. 22
D. 36

Answer: Option C

Explanation:

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