Before an explosion can occur in a boiler furnace, there must be an accumulation of unburned fuel, sufficient air to form an explosive mixture, and a __________.
A
space large enough for the explosion to occur
B
high steam demand on the boiler
C
source of ignition for the explosive mixture
D
ground in the burner ignition electrode
Loading interactive features...
Question 1 / 205eccefa0bacbc34ba4d46e8b
Question 1 of 205eccefa0bacbc34ba4d46e8b
Before an explosion can occur in a boiler furnace, there must be an accumulation of unburned fuel, sufficient air to form an explosive mixture, and a __________.
Before an explosion can occur in a boiler furnace, there must be an accumulation of unburned fuel, sufficient air to form an explosive mixture, and a __________.