Question

A pulverized coal boiler produces approximately _____ fly ash and ______ bottom ash.
1. 60 %; 40 %
2. 50 %; 50 %
3. 80 %; 20 %
4. 70 %; 30 %

Answer 1

Correct Answer - Option 3 : 80 %; 20 %

Concept:

Coal ash: A collection of residuals produced during the combustion of coal.

Fly ash: A light form of coal ash that floats into the exhaust stacks.

Bottom ash: The heavier portion of coal ash that settles on the ground in the boiler.

Explanation:

In the coal thermal power plant, the steam is produced at high pressure in the steam boiler due to the burning of fuel (pulverized coal) in boiler furnaces. The pulverized coal boiler produces approximately 80% fly ash and 20% bottom ash.