Which device is used for dewatering in this scenario?

Which device is used for dewatering in this scenario?

• A. Manual bilge pump
• B. Sponge
• C. Eductor
• D. Towline

Answer: (C)

Dewatering with an eductor works best here because it uses the Venturi effect to move water from a bilge or low spot without relying on a pump with moving parts in the suction line. A high-velocity motive fluid—steam or compressed air—flows through a nozzle, creating a vacuum that entrains surrounding water. This mixed stream is then discharged through the outlet, effectively removing water from the area. The eductor is especially useful in confined spaces or hazardous environments where electric pumps aren’t ideal and where you need to move larger volumes with minimal manual effort. In contrast, a sponge can only soak up small amounts and is slow for significant flooding. A manual bilge pump requires physical effort and time, which isn’t efficient for rapid dewatering. A towline is for towing and has no role in removing water.

Dewatering with an eductor works best here because it uses the Venturi effect to move water from a bilge or low spot without relying on a pump with moving parts in the suction line. A high-velocity motive fluid—steam or compressed air—flows through a nozzle, creating a vacuum that entrains surrounding water. This mixed stream is then discharged through the outlet, effectively removing water from the area. The eductor is especially useful in confined spaces or hazardous environments where electric pumps aren’t ideal and where you need to move larger volumes with minimal manual effort.

In contrast, a sponge can only soak up small amounts and is slow for significant flooding. A manual bilge pump requires physical effort and time, which isn’t efficient for rapid dewatering. A towline is for towing and has no role in removing water.