Question 271Steam Plants - Assistant Engineer70% to pass
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 _______________.
AI Explanation
The correct answer is C) 15 seconds.
Modern boiler automation systems allow a "trial for ignition" period during burner light-off, where the flame safeguard system is temporarily bypassed. This period is limited to 15 seconds by regulation to ensure safety. The 15-second limit allows sufficient time for the burner to ignite while preventing an unsafe condition if the burner fails to light.
The other options are incorrect because 5 seconds may not be enough time for the burner to ignite, and 30 seconds would be an excessively long period that could pose a safety risk if the burner does not light within that time.
Related Questions
#269 Which of the following represents the proper color of the flame end farthest from the boiler burner during normal operations? #270 If one burner of a group of operating steam atomizing burners in a steaming boiler is cut out, the register doors for that burner should be _______________.#272 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? #273 In a boiler automation system, if a burner fuel oil solenoid valve continually trips closed under normal steaming conditions, you should _______________.#274 If an automatically fired burner ignites, but repeatedly goes out within two seconds, the cause could be a/an _______________.