A regulator is used in pneumatics to perform which of the following functions?

The function of a regulator in pneumatics is to control the outlet pressure in a circuit. In pneumatic systems, maintaining the correct air pressure is crucial for the efficient operation of tools and equipment. The regulator ensures that the pressure delivered to the system is at a specified level, regardless of variations in the supply pressure coming from the compressor. This regulation allows for consistent performance and the prevention of damage to pneumatic components that could occur if the pressure were too high or too low.

While removing dirt from the air, shutting off the compressor, and connecting circuits are all important aspects of pneumatic systems, they are functions performed by different components such as filters, valves, and distribution manifolds, rather than by a pressure regulator.