What is the primary purpose of a coupling in machine alignment?

• A. To connect two shafts
• B. To make the machine run faster
• C. To increase power output
• D. To reduce noise during operation

Answer: (A)

The primary purpose of a coupling in machine alignment is to connect two shafts. Couplings serve as mechanical devices that link the rotational axes of two different components, facilitating the transmission of power and torque between them. In alignment practices, ensuring that these shafts are properly connected and aligned is crucial for the smooth operation of the machinery. Misalignment can lead to increased wear, energy loss, and potential mechanical failure. Couplings also allow for slight misalignments and can dampen vibrations, but their fundamental role remains in connecting shafts to ensure efficient power transfer.