Question 160Steam Plants - Assistant Engineer70% to pass
Which of the automatic boiler controls listed should be tested prior to lighting off an auxiliary boiler?
AI Explanation
The correct answer is B) Low water level cutoff switch.
The low water level cutoff switch is a critical safety device on auxiliary boilers that must be tested prior to lighting off the boiler. This switch is designed to automatically shut off the boiler's fuel supply if the water level drops below a safe operating level, preventing damage to the boiler from low water conditions. Ensuring this safety device is functioning properly is a crucial step before firing up the boiler.
The other options are not directly related to the pre-lighting checks required for the auxiliary boiler. Automatic bottom blow valves, voltage output of the ignition transformer, and insulation resistance readings in the ignition system are not part of the mandatory safety checks for this specific task.
Related Questions
#158 Which of the following would indicate a moderate leak in the desuperheater? #159 When preparing to light off a cold boiler equipped with a return flow fuel oil system, the recirculating valve directs the flow of oil _______________.#161 Why should the main steam stop valve of an auxiliary boiler be eased off its seat and then gently closed before lighting off? #162 Which statement is true concerning two-stage air ejector assemblies? #163 Main condensate recirculating systems are primarily intended to _______________.