What is the purpose of a ship's bilge pump?

• A. To pump fuel to engines
• B. To remove water from the bilge to keep the engine room and hull dry
• C. To ventilate the engine room
• D. To power ballast pumps

Answer: (B)

The main idea here is that a bilge pump’s job is to remove water that collects in the bilge, helping to keep the engine room and the hull dry. Water can end up in the bilge from rain, leaks, waves, or condensation, and if it isn’t removed it can cause flooding, damage equipment, and create slippery surfaces. A bilge pump draws water from the lowest space in the hull and pushes it overboard (or into a designated tank) so the area stays dry. It’s typically electric or engine-driven and may operate automatically via a float switch.

It isn’t used to pump fuel to engines, since that’s part of the fuel system. It doesn’t ventilate the engine room, which is done by the engine room ventilation system. And it doesn’t power ballast pumps, which move seawater for trimming and stability.