Class 5 Boiler Practice Exam

A device that prevents excess generation of steam and maintains the safe pressure limit of a steam boiler is called what?

1. Pressure gauge

2. Pressure control

3. Pressure reducer

4. Pressure relief

The correct answer is: Pressure control

The device that prevents excess generation of steam and maintains the safe pressure limit of a steam boiler is known as a pressure control. This device plays a critical role in ensuring the operational safety of the boiler by monitoring and regulating the pressure. When the pressure reaches a set limit, the pressure control activates to adjust the firing of the boiler or any other system components to prevent pressure from exceeding safe levels. By doing so, it helps to mitigate the risk of hazardous conditions that can arise from excessive pressure, ensuring that the boiler operates within its designed parameters. In contrast, a pressure gauge simply measures and displays the pressure without controlling it. A pressure reducer is designed to lower the pressure of the steam, while a pressure relief device is specifically designed to release pressure in emergency situations to prevent an explosion or other dangerous failures. However, it does not actively maintain pressure during normal operations like a pressure control does. Thus, pressure control is key to continuously managing steam generation within safe thresholds.