Which statement correctly describes the placement of ducts in a powered ventilation system?

Which statement correctly describes the placement of ducts in a powered ventilation system?

• A. Ducts are flexible and not fixed
• B. Located above the bilge water level
• C. Ducts are permanently fixed to the blower
• D. Ducts run below the engine

Answer: (C)

In a powered ventilation system, the ducts must be permanently fixed to the blower so the air path stays secure and sealed even when the vessel moves or vibrates. If the ducts are flexible and not fixed, they can loosen or detach, causing leaks, backflow of fumes, and reduced ventilation efficiency, which is dangerous in enclosed spaces. The exact placement relative to bilge water or engine location isn’t the defining factor; the key point is that the ductwork remains firmly attached to the blower for a continuous, reliable airflow.

In a powered ventilation system, the ducts must be permanently fixed to the blower so the air path stays secure and sealed even when the vessel moves or vibrates. If the ducts are flexible and not fixed, they can loosen or detach, causing leaks, backflow of fumes, and reduced ventilation efficiency, which is dangerous in enclosed spaces. The exact placement relative to bilge water or engine location isn’t the defining factor; the key point is that the ductwork remains firmly attached to the blower for a continuous, reliable airflow.