Minnesota Boiler License Practice Exam 2025 - Free Boiler License Practice Questions and Study Guide

A 2nd Class Grade A, B, or C License is the appropriate credential for a shift engineer under a chief engineer for a hot water plant operating at under 250 degrees Fahrenheit and 160 PSIG with a total boiler horsepower of 500 bhp. This licensing requirement is determined by state regulations that categorize boiler operations into different classes depending on the temperature, pressure, and horsepower of the boilers used.

In Minnesota, the 2nd Class license is specifically tailored for the operation of low-pressure and limited-capacity boilers, making it suitable for the conditions outlined in this scenario. The flexibility offered by allowing Grade A, B, or C indicates that while the 2nd Class designation is essential, there is room for the engineer to hold any of these grades depending on their specific training and experience.

The other options do not fit the criteria as precisely. A 1st Class license generally pertains to higher power or more complex systems, beyond the specifications given in the question. The phrase "Only a 2nd Class A or B" excludes the option for a Grade C license, which is acceptable, while "Any Class Grade license" is too broad and does not comply with the specific requirements stated for the role in question. Thus, the