Bennett Mechanical Comprehension Practice Test 2025 - Free Practice Questions and Review Guide

Question: 1 / 400

How does an Archimedean screw function in moving liquids?

By using a piston to push liquids upward

By rotating a helical blade inside a cylinder

An Archimedean screw functions by rotating a helical blade inside a cylinder, which allows it to lift and move liquids effectively. When the screw is turned, the helical shape of the blade captures a volume of liquid at the bottom, transporting it upward as the screw rotates. The design harnesses the principle of mechanical advantage, where the rotation of the screw elevates the liquid against gravitational forces, making this method particularly efficient for transferring water and other fluids from lower to higher elevations.

The effectiveness of this device is derived from the continuous motion and the ability of the helical blade to push the liquid along the spiral path created within the cylinder. This motion creates low-pressure zones that help to lift the fluid, contrasting with systems that rely solely on gravitational pull or vacuum systems that may not provide the same mechanical efficiency in moving liquids.

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By utilizing gravitational force alone

By creating a vacuum to draw liquids

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