The primary function of couplings in a pump system is to transmit rotary motion from the motor to which component?

• A. Pump casing
• B. Pump impeller
• C. Pump shaft
• D. Pump motor

Answer: (C)

The primary function of couplings in a pump system is to ensure effective communication of rotary motion from the motor to the pump shaft. The coupling serves as a mechanical link that connects the motor shaft to the pump shaft, allowing for the transfer of rotational energy needed for the pump to operate efficiently.

When the motor is activated, its rotation is transmitted to the pump shaft via the coupling, driving the impeller and enabling the pump to move fluids. This connection is crucial for the overall functionality of the pump system, as any misalignment or failure in the coupling can result in operational inefficiencies or system breakdowns.

Understanding the role of the coupling is essential for maintenance and troubleshooting, as it influences not only mechanical performance but also the longevity of the components involved. Proper selection and installation of couplings can minimize wear, vibration, and potential failures in the pump system.