Red Seal Industrial Mechanic (Millwright) Practice Exam

What is the purpose of a safety valve in a pressurized system?

1. To increase system performance

2. To relieve excess pressure and prevent system failure

3. To maintain constant temperature

4. To regulate fluid flow

The correct answer is: To relieve excess pressure and prevent system failure

A safety valve in a pressurized system is designed specifically to relieve excess pressure that may build up due to overpressure conditions. This is crucial for preventing potential system failures, such as catastrophic leaks or explosions, which can occur if the pressure exceeds the safe operating limits of the system components. When the pressure reaches a pre-set level, the safety valve opens to release excess pressure, thereby ensuring the integrity and safety of the system. This mechanism acts as a protective device, allowing for safe operation and safeguarding both equipment and personnel from harm. Understanding this function highlights the importance of safety valves in industrial applications, where managing pressure is critical to maintaining system stability and operational safety.