Question 185Steam Plants - 1st Asst/Chief70% to pass
While trying to light off a burner on a semi-automated boiler, you note that the fuel oil solenoid valve at the burner will not stay open. Which of the following conditions could cause this problem?
AI Explanation
The correct answer is B) The forced draft air supply has failed.
If the forced draft air supply has failed, the lack of air flow would prevent the burner from lighting off properly. Without sufficient air, the fuel oil solenoid valve would not be able to stay open, as the burner requires the proper air-fuel ratio to ignite and maintain combustion.
The other answer choices are incorrect because:
A) The flame scanner issue would not directly impact the solenoid valve's ability to stay open.
C) High fuel oil pressure would not prevent the solenoid valve from opening.
D) If the solenoid coil was energized, the valve should open, not remain closed.
Related Questions
#183 Which of the listed operating practices is considered as safe, and should be followed when opening and inspecting the waterside of a boiler? #184 Which of the precautions listed should be taken when gagging a boiler safety valve? #186 In a boiler automation system, if a burner fuel oil solenoid valve continually trips closed under normal steaming conditions, you should _______________.#187 While your vessel is steaming with one boiler, the automatic combustion control system sensing line for the idle boiler is accidentally opened. How will this affect the steaming boiler? #188 Modern day boiler automation allows bypassing the "flame safeguard" system to permit a burner to have a "trial for ignition" period during burner light-off. This period may not exceed _______________.