Question 204General Subjects - 1st Asst/Chief

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Referring to illustrated diagram, what type of HVAC system is shown? Illustration GS-RA-43

Diagram for USCG General Subjects Chief: Referring to illustrated diagram, what type of HVAC system is shown?...
AA single zone system
BA variable air volume system
CA dual duct system
DA terminal reheat system
AI Explanation

The correct answer is C) A dual duct system. A dual duct system is an HVAC system that uses two separate ductwork systems - one for hot air and one for cold air. This allows the system to deliver a customized mix of hot and cold air to different zones, providing individualized temperature control. This matches the description of the HVAC system shown in the illustrated diagram GS-RA-43. The other answer choices do not accurately describe the system depicted. A single zone system only has one temperature zone, a variable air volume system uses a single duct with dampers to vary airflow, and a terminal reheat system uses a single duct with reheating coils near the outlets.

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Official Resources
46 CFR Machinery & Electrical 46 CFR Engineering USCG National Maritime Center
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