Boiler Operator Licensing Practice Exam

Cleaning the fire and water sides of a boiler before laying it up is an essential step for several reasons. It helps to prevent corrosion and the buildup of scale, which can negatively impact boiler efficiency and longevity. Removing soot, scale, and other residues from both sides ensures that when the boiler is put back into service, it operates at optimal efficiency and is safe to use. Additionally, a clean boiler is less likely to develop issues during the layup period, as contaminants can cause deterioration if left unattended.

The other options, while important for overall safety and maintenance in different contexts, do not prioritize the immediate condition of the boiler in preparation for layup as cleaning does. Inspecting for leaks ensures structural integrity, checking the fuel supply pertains to operational readiness, and testing safety valves ensures pressure safety; however, these steps are secondary to ensuring that the boiler is thoroughly clean to avoid future operational issues after it resumes service.