Which of the following best describes the role of a coupling in a compressor?

The correct choice accurately describes the role of a coupling in a compressor as it connects the compressor to the motor. A coupling is a mechanical device designed to transmit power from the motor to the compressor while allowing for some degree of misalignment between the two components. This connection is vital for ensuring that the compressor operates efficiently, as it enables the motor to drive the compressor and thus compress the refrigerant or air involved in various systems.

Understanding the fundamental function of a coupling is essential for grasping how different parts of a compressor system interact. While lubrication, temperature regulation, and filtration are important functions in a refrigeration or air conditioning system, they are not the primary role of a coupling, which is focused on ensuring reliable power transmission between the motor and compressor.