A _____ is a Complex Device That Controls the Flow

Question

A _____ is a complex device that controls the flow of pressurized liquids and gases.
A) return bend
B) connector
C) nipple
D) valve

Accepted Answer

A valve is specifically designed to control the flow of liquids and gases under pressure, making it the best choice for this definition. While the other options are all types of fittings or connectors commonly used in plumbing and piping systems, they do not have the same specific function as a valve.