Industrial Maintenance Technician Practice Test 2025 – Your All-in-One Guide to Exam Success!

The ball valve is a common choice in plumbing systems due to its efficient design and reliable operation. This type of valve utilizes a spherical disc, or "ball," with a hole in the center that allows fluid to pass through when the valve is open. When the ball is rotated a quarter turn, the hole is perpendicular to the flow, effectively stopping the flow of fluid.

Ball valves provide excellent sealing capabilities and are capable of working well under various pressures and temperatures, making them suitable for many plumbing applications. Their straightforward operation and durability lead to their popularity in residential and commercial plumbing systems, particularly in situations where quick shut-off is needed.

While other valve types, such as butterfly and gate valves, have their uses, ball valves are generally preferred for on/off control applications in plumbing because of their ease of use and minimal resistance to flow.