A flange coupling is used for which type of shaft alignment?

• A. Collinear shaft
• B. Non-collinear shafts
• C. Rigid coupling
• D. Flexible

Answer: (A)

A flange coupling is primarily used for collinear shaft alignment. This type of coupling connects shafts that are aligned along a common axis, allowing for the efficient transfer of torque between them. The design of the flange coupling, which typically involves two flanges bolted together, ensures that the shafts can be precisely aligned and held securely in place.

When shafts are collinear, they operate effectively with minimal vibrations and misalignments, making flange couplings an ideal choice for such applications. The ability to maintain this alignment is crucial for the performance of rotating equipment, as any significant misalignment can lead to increased wear and tear, reduced efficiency, and potential failure.

Other options relate to different aspects of shaft alignment or coupling types. Non-collinear shafts would require flexible couplings to accommodate angular misalignments, while rigid couplings are meant for shafts that are precisely aligned and do not allow for any movement. Flexible couplings, on the other hand, are designed specifically to handle misalignment, but they are not applicable for collinear shafts where a direct and strong connection is needed.