Minnesota Special Engineer Boiler License Practice Exam

What specific device would only be found on a steam boiler?

1. Pressure control valve

2. Tricocks

3. Expansion tank

4. Hot water gauge

The correct answer is: Tricocks

Tricocks are specific types of water level indication devices typically found on steam boilers. They consist of three small valves connected to the boiler at various heights to check the water level and ensure proper operation. By opening these valves, operators can ascertain the presence of water at different levels in the boiler, which is crucial for preventing dry firing and ensuring safe boiler operation. The importance of tricocks in steam boilers stems from the need to monitor water levels closely due to the high pressures and temperatures involved. In contrast, while pressure control valves and expansion tanks are also essential components in various boiler systems, they can be found in both steam and hot water boilers. A hot water gauge is specific to hot water systems, as it is designed to measure water temperature and not steam pressure. Therefore, the presence of tricocks uniquely identifies the steam boiler design and operation.