Millwright Level 1 Practice Exam 2025 - Free Millwright Practice Questions and Study Guide

Question: 1 / 445

Which of the following is NOT a type of tolerance?

Unilateral

Bilateral

Direct

Geometric

In the context of engineering and manufacturing, tolerances are essential specifications that define the allowable limits for dimensions and physical characteristics of parts. Unilateral tolerance refers to a tolerance that allows variation in one direction (either above or below the nominal dimension) but not both. Bilateral tolerance allows for variation in both directions from the nominal dimension, providing a range above and below.

Geometric tolerance, on the other hand, pertains to the allowable variations related to the geometry of a part, such as its form, orientation, or location. These geometric tolerances are defined in standards like the ASME Y14.5.

The term "direct" does not align with standard tolerance classifications used in machining and engineering. It does not represent a recognized type of tolerance, making it the correct answer to the question. Understanding these classifications is crucial as they guide the manufacturing process and ensure that parts fit and function together correctly within specified limits.

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