Red Seal Steamfitter/Pipefitter Practice Exam

What is the primary function of a check valve?

1. To regulate the temperature of the fluid

2. To prevent backflow in a piping system

3. To increase the flow rate of the liquid

4. To decrease the pressure within the system

The correct answer is: To prevent backflow in a piping system

The primary function of a check valve is to prevent backflow in a piping system. This is a crucial role in ensuring that fluids only flow in one direction, which helps to maintain the intended flow throughout the piping network. By allowing fluid to pass through in the desired direction while automatically closing to block any reverse flow, check valves protect equipment from damage, maintain system pressure, and prevent contamination that could occur if fluids were allowed to flow backward. Check valves are commonly used in various applications, including water and wastewater systems, as well as in heating and cooling circuits. Their ability to function without the need for external control makes them essential components in ensuring the safety and efficiency of fluid handling systems.