MN Boilers – Complete Boiler License Exam Questions & Answers (2025/2026 Update)

MN Boilers – Complete Boiler License Exam Questions & Answers (2025/2026 Update) For the purpose of rating boiler horsepower for an Engineers License only, how many square feet of boiler surface shall be equivalent to one boiler horsepower on a boiler? - Correct Answer 10 Sq. Ft. Heating Surface What is meant by the term "Low Pressure Boiler"? - Correct Answer Boilers operating at a steam or other vapor pressure of 15psig or less, or a hot water or other liquid boiler in which the pressure does not exceed 160 psig or a temperature of 250 degrees F. A person holding a current State of Minnesota Special Engineers License could be in charge of, or a shift engineer in what size plant(s)? - Correct Answer High and Low pressure boilers not to exceed a total of 50 boiler horsepower, or a shift engineer in a 100 horsepower plant. Special Engineer may serve as an apprentice of what size water/liquid or steam/vapor boiler? - Correct Answer In any plant regardless of size under the direct supervision of a properly licensed engineer. The purpose of low water cut out on a steam or hot water boiler is to what? - Correct Answer Shut off the burner when a low water condition exists. The valve or valves that must relieve all excess pressure on a steam or hot water boiler are what? - Correct Answer Safety valve and/or an ASME approved safety relief valve. A Tri indicator could be found on a: - Correct Answer Hot water boiler A tri indicator would inform the boiler operator of what? - Correct Answer The TEMPERATURE of the water, the PRESSURE of the water in PSIG, and the ALTITUDE of water in feet.