Answer:
A meter-out flow control circuit controls the speed of an actuator by exhausting excess air and is used in pneumatic and hydraulic systems. The closest multiple-choice option is (c) Exhausting excess air.
Step-by-step explanation:
A meter-out flow control circuit is designed to manage the speed of an actuator in pneumatic and hydraulic systems. The correct answer to the question is that it controls the speed of an actuator by exhausting excess air from the system. This is accomplished by installing a flow control valve at the outlet side of the actuator that restricts the flow of the fluid leaving the actuator. It is not about applying back pressure, restricting air flow to the actuator, or reducing the supply pressure; these may be characteristics of other types of flow control in a circuit.
An easy way to remember this is that 'meter-out' refers to metering, or controlling, the flow as it exits the actuator, not as it enters.
The closest multiple-choice option is (c) Exhausting excess air.