Refrigeration & Air Conditioning USCG Question #589 (Set 12)

What type of HVAC system is characterized by having control dampers in locations other than the outside air supply, outside air exhaust, and recirculation damper applications?

Official USCG Answer & Rule Citation

Correct Answer: Option D — A variable air volume system

Variable air volume systems regulate airflow dynamically through zone-level control dampers located in distribution ductwork, unlike constant volume systems. This method modulates air quantity rather than supply temperature to meet changing thermal loads across shipboard accommodations.

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