In a boiler installation the natural draught is produced________?
Adue to the fact that furnace gases being light go through the chimney giving place to cold air from outside to rush in
Bdue to the fact that at the chimney top the pressure is more than its environmental pressure
Cdue to the fact that pressure at the grate due to cold column is higher than the pressure at the chimney base due to hot column
Dall of the above
Correct answer
C. due to the fact that pressure at the grate due to cold column is higher than the pressure at the chimney base due to hot column
Explanation
The correct answer is due to the fact that pressure at the grate due to cold column is higher than the pressure at the chimney base due to hot column.