Intro to Millwright Practice Exam 2025 - Free Millwright Skills Practice Questions and Study Guide

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Which of these best describes the function of a pneumatic jack?

Lifting heavy loads

The function of a pneumatic jack is primarily to lift heavy loads using compressed air. These jacks operate based on the principles of pneumatic pressure, where air pressure is harnessed to create mechanical force that raises heavy objects. This makes them particularly useful in various industrial and maintenance applications, such as lifting vehicles for repairs or supporting heavy machinery for installation or maintenance tasks. Their design and operation are specifically focused on providing the force needed to elevate objects safely and efficiently.

While cutting materials, welding components, and prying open items are important functions in different contexts, they do not align with the primary purpose of a pneumatic jack, which is centered on lifting rather than manipulating or altering materials.

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Cutting materials

Welding components

Prying open items

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