Engineering · Pumps — Eductor
An eductor (jet pump) used to dewater a space has the advantage of:
- AHaving no moving parts and tolerating debris-laden water, using a high-pressure driving fluid✓ Correct
- BPumping against very high discharge head
- CRequiring no driving fluid
- DProducing potable water
Explanation
An eductor uses a high-velocity driving fluid through a venturi to entrain and remove water. With no moving parts it handles trash and silt well and cannot be air-bound, which makes it useful for emergency bilge/dewatering service.
Authority: Modern Marine Engineer's Manual; eductor principle
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