307 Advanced Damage Control (DC) Practice Exam 2025 – The Comprehensive All-in-One Resource to Ensure Success!

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What principle does a perijet use to extract water?

Capillary action

Gravity drainage

Venturi effect

A perijet operates on the principle of the Venturi effect, which is fundamental to its ability to extract water. The Venturi effect describes how fluid pressure decreases as fluid flows through a constricted section of pipe, resulting in a lower pressure area that can draw in additional fluid.

In the case of a perijet, water is drawn into the device by the rapid flow of another fluid, typically a jet of water or air, through a narrow nozzle. As this jet speeds up and passes through the constriction, it creates a vacuum that pulls surrounding water into the system. This principle is efficient for moving water and is particularly useful in damage control situations where the rapid removal of water is critical to prevent further damage.

This understanding emphasizes the importance of fluid dynamics in various applications, particularly in damage control environments where effective water extraction is paramount.

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Centrifugal force

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