Which of the following best describes "flow control" in a pneumatic system?

Flow control in a pneumatic system primarily involves regulating the speed and force of actuators. This is accomplished through the management of airflow and pressure within the system. Flow control devices, like flow control valves or restrictors, can adjust the rate at which air moves to actuators, thereby influencing how quickly they extend or retract. This capability allows for smooth operation and precise control of machinery, which is essential in applications requiring specific speeds and forces to perform tasks efficiently and safely.

The other options do not accurately capture the essence of flow control. Increasing air pressure might help in maintaining system performance but does not directly regulate the speed of actuators. Sealing off the air supply entirely would halt operation rather than control flow. Measuring the temperature of the air supply is unrelated to controlling flow dynamics. Thus, regulating the speed and force of actuators is the key aspect of flow control in pneumatic systems.