Minnesota Boiler License Practice Exam 2026 – All-in-One Guide to Passing with Confidence

The term "low pressure boiler" refers specifically to boilers that operate under certain pressure and temperature limits which define their classification. The correct definition states that low pressure boilers are those that have a steam or other vapor pressure of 15 psig or less. Additionally, for water or other liquid boilers, the pressure must not exceed 160 psig, nor should the temperature exceed 250 degrees Fahrenheit. This classification is crucial for safety and regulatory compliance in boiler operation.

Understanding these limits is important for anyone working in this field, as it impacts the safety protocols, maintenance requirements, and operational procedures that must be followed. Many jurisdictions use these definitions to establish guidelines for inspections, operator qualifications, and pressure vessel standards. The other options either misstate these pressure limits or do not incorporate both the specific pressure and temperature criteria needed to accurately define a low pressure boiler.