What removes water from spaces by using a vacuum suction?

What removes water from spaces by using a vacuum suction?

• A. Pumps
• B. Valves
• C. Eductors
• D. Siphons

Answer: (C)

Vacuum-based water removal is accomplished by an eductor. An eductor uses a high-velocity jet of motive fluid to create a low-pressure region (the venturi effect) that entrains surrounding liquid and draws it into the suction line. The energy of the motive fluid generates the suction, so water can be pulled out of a space without a powered pump at the location. In practice, compressed air, steam, or water can serve as the motive fluid, making eductors ideal for dewatering in tight or power-limited areas. By contrast, pumps rely on mechanical energy to push water, valves merely control flow, and siphons depend on gravity and a primed tube to move liquid rather than creating local vacuum suction.

Vacuum-based water removal is accomplished by an eductor. An eductor uses a high-velocity jet of motive fluid to create a low-pressure region (the venturi effect) that entrains surrounding liquid and draws it into the suction line. The energy of the motive fluid generates the suction, so water can be pulled out of a space without a powered pump at the location. In practice, compressed air, steam, or water can serve as the motive fluid, making eductors ideal for dewatering in tight or power-limited areas. By contrast, pumps rely on mechanical energy to push water, valves merely control flow, and siphons depend on gravity and a primed tube to move liquid rather than creating local vacuum suction.