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Rigid duct weight is carried by the equipment's flexible connector. What support change is needed?

California C-20 exam practice question · Fabrication, Installation & Startup

Rigid duct weight is carried by the equipment's flexible connector. What support change is needed?

  • Provide independent supports without stressing the flexible connector
  • BUse the connector as a hanger
  • CIncrease fan horsepower
  • DSupport it from electrical conduit for the described HVAC equipment and measured operating conditions

Why A is correct

The best answer is: Provide independent supports without stressing the flexible connector. Flexible connectors isolate vibration and are not structural supports. Independent hangers protect joints, clearances, drainage, and equipment from imposed duct weight. The transferred operating condition requires the same design, installation, diagnostic, or safety principle in a different HVAC context. The other choices skip a prerequisite, conflict with the listed procedure, or treat a symptom without controlling its cause.

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