Class 5 Boiler Practice Exam 2026 - Free Boiler Certification Practice Questions and Study Guide

Sectional cast iron boilers are designed to handle specific pressures, and the minimum test pressure is crucial to ensure the integrity and safety of the boiler. The correct choice of not less than 60 psi reflects industry standards and practices for testing these types of boilers.

The purpose of the test pressure is to verify that the boiler can handle operating pressures without any leaks or failures. A pressure of 60 psi is deemed sufficient to provide a rigorous assessment of the boiler's construction and safety features. This testing helps to identify any weak points or potential failures in the materials or design before the boiler is put into service.

Choosing a minimum test pressure that is lower than 60 psi would not adequately reflect the maximum operating pressure such boilers may encounter in actual use, potentially compromising safety standards. Therefore, adhering to the 60 psi benchmark ensures that sectional cast iron boilers meet necessary operational safety and efficiency requirements.