New York Low Pressure Boiler COF Practice 2025 - Free Practice Questions and Study Guide

The correct answer is that a steam boiler has a maximum output regulated by the presence of a safety valve. Steam boilers operate by converting water into steam through the addition of heat, and they operate under pressure. The safety valve is a critical safety feature designed to prevent dangerous over-pressurization of the boiler. If the steam pressure exceeds a predetermined limit, the safety valve will open to release steam and alleviate pressure, thereby protecting the boiler and preventing potential explosions. This mechanism is essential for maintaining safe operating conditions in steam boilers.

In contrast, electric boilers typically do not use pressure regulation in the same way as steam boilers, as they usually operate at lower pressures and do not produce steam. Hot water boilers also do not generally rely on safety valves for regulating output but instead use pressure relief valves as a preventive measure against excessive pressure. Gas-fired boilers may have safety mechanisms, but they primarily focus on combustion and operational efficiency rather than pressure regulation in the same context as steam boilers.