Q
In a boiler installation the natural draught is produced_____________?
-
A
A. Due to the fact that furnace gases being light go through the chimney giving place to cold air from outside to rush in
-
B
B. 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
-
C
C. Due to the fact that at the chimney top the pressure is more than its environmental pressure
-
D
D. All of the above
Correct Answer:
B. B. 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
