Red Seal Steamfitter/Pipefitter Practice Exam

What is the role of a relief valve in a pressure system?

1. To increase pressure in the system

2. To adjust fluid flow rates

3. To release excess pressure to prevent over-pressurization

4. To maintain a constant pressure

The correct answer is: To release excess pressure to prevent over-pressurization

A relief valve is an essential safety component in a pressure system, designed specifically to manage and control pressure levels. Its primary function is to release excess pressure that may build up within the system, which helps prevent over-pressurization that can lead to equipment failure, leaks, or catastrophic explosions. By allowing fluid or gas to escape when a pre-set pressure limit is reached, the relief valve effectively protects the integrity of the system and ensures safe operation. In a malfunctioning or overloaded system, without the relief valve performing its function, the pressure could rise to dangerous levels, posing significant safety risks. Therefore, the relief valve is vital in maintaining operational safety by preventing pressure from reaching harmful levels. This is a key reason why it is a crucial part of many hydraulic and pneumatic systems.