Flexible coupling connects air lines to the blower to:

• A. Minimize air loss
• B. Minimize vibration
• C. Reduce moisture
• D. Reduce noise

Answer: (B)

The main idea is that rotating equipment like a blower creates vibration that can be transmitted into the piping and surrounding structure. A flexible coupling provides a compliant, elastic connection that can absorb small movements and accommodate slight misalignment between the blower and the air lines. By doing so, it dampens the vibrational energy that would otherwise travel through the piping, reducing stress, wear, and noise from vibration. While it may indirectly lower noise, the primary purpose is vibration isolation. It isn’t designed to minimize air loss or moisture, which would be addressed by seals and other components.