Which statement about exhaust in natural ventilation is true?

Which statement about exhaust in natural ventilation is true?

• A. It pulls air into the space via a cowling
• B. It vents into bilge water
• C. It is attached to a hose extending to the lower third of the space and vents overboard
• D. It is located at the bow

Answer: (C)

Exhaust in natural ventilation is about removing used air from a space and venting it overboard to prevent buildup of fumes. The best way to achieve this is to have a hose that reaches into the lower part of the space and carries the air out over the side of the vessel. Placing the exhaust low helps pull air from the lower portion of the space where heavier-than-air contaminants can accumulate, and discharging overboard keeps the exhaust away from crew and living spaces so it can dissipate safely. The other scenarios describe pulling air in through a cowling (an intake, not exhaust), venting into bilge water (dangerous and incorrect), or a fixed bow location (not how exhaust for a natural ventilation system is arranged).

Exhaust in natural ventilation is about removing used air from a space and venting it overboard to prevent buildup of fumes. The best way to achieve this is to have a hose that reaches into the lower part of the space and carries the air out over the side of the vessel. Placing the exhaust low helps pull air from the lower portion of the space where heavier-than-air contaminants can accumulate, and discharging overboard keeps the exhaust away from crew and living spaces so it can dissipate safely. The other scenarios describe pulling air in through a cowling (an intake, not exhaust), venting into bilge water (dangerous and incorrect), or a fixed bow location (not how exhaust for a natural ventilation system is arranged).