A ceiling is being closed before the HVAC contractor has balanced branch airflows, and several balancing dampers will be inaccessible. What should be done?
Correct Answer
C) Coordinate access and complete or preserve access for balancing before concealment
Air balancing needs access to dampers and devices; ceilings should not conceal required adjustment points without access panels or completed balancing. Other choices prevent proper commissioning.
Why This Is the Correct Answer
Air balancing needs access to dampers and devices; ceilings should not conceal required adjustment points without access panels or completed balancing. Other choices prevent proper commissioning.
Why the Other Options Are Wrong
Option A: Close the ceiling and estimate airflows later, leaving balancing dampers unverified
Choice A gives Close the ceiling and estimate airflows later. Its specific error: it answers the Balancing dampers prompt with the wrong practical move.
Option B: The contractor should remove all dampers so balancing is unnecessary
Choice B (Remove all dampers so balancing is unnecessary) is rejected because it leaves out the controlling Balancing dampers result: Coordinate access and complete or preserve access for balancing before concealment.
Option D: Balance only the nearest diffuser and close the remaining ceiling
The trap in D is Balance only the nearest diffuser. That selection is wrong because it tries to bypass the Balancing dampers checkpoint.
Memory Technique
Pair balancing dampers with the real field trigger, then choose the response that produces Coordinate access and complete or preserve access for balancing before concealment.
Reference Hint
Open Mechanical and Electrical Systems for Construction Managers, 4th Ed., 2024; use the index entry or section for "HVAC testing, adjusting, and balancing access" to confirm that Air balancing needs access to dampers and devices; ceilings should not conceal required adjustment points without access panels or completed balancing.
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