General Subjects (Auxiliaries & Systems) USCG Question #982 (Set 16)

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

VAV systems utilize terminal units equipped with control dampers to regulate the volume of air delivered to specific zones based on local temperature requirements. Unlike constant volume systems, these dampers modulate airflow dynamically, allowing the system to respond precisely to varying heat loads across different sections of the vessel.

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