Questions: A meter-out flow control circuit is used to control aiding loads, builds back pressure at the actuator, is used to control opposing loads, all of the above.

Solution Steps

A meter-out flow control circuit is a hydraulic circuit configuration where the flow control valve is placed on the outlet side of the actuator. This setup is used to control the speed of the actuator by restricting the flow of hydraulic fluid leaving the actuator.

• Is used to control aiding loads: Aiding loads are those that assist the movement of the actuator. Meter-out circuits are not typically used for aiding loads because they can cause cavitation.
• Builds back pressure at the actuator: Meter-out circuits do build back pressure at the actuator, which helps in controlling the speed and preventing cavitation.
• Is used to control opposing loads: Opposing loads resist the movement of the actuator. Meter-out circuits are effective for controlling opposing loads because they provide the necessary back pressure.
• All of the above: This option would be correct if all the previous statements were true.

Based on the analysis, a meter-out flow control circuit is primarily used to build back pressure at the actuator and control opposing loads. It is not typically used for aiding loads.

Final Answer