What is a unilateral tolerance?

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Master the Task Group 142 Tolerances Test with comprehensive quizzes and insights, including question explanations and essential tips. Prepare for success!

Multiple Choice

What is a unilateral tolerance?

Explanation:
Unilateral tolerance means you permit variation in only one direction from the basic size. In practice, the part can be larger (or smaller) than the nominal, but not both directions. For example, a dimension specified as 50.00 +0.10 / -0.00 may range from 50.00 to 50.10, but never below 50.00. This is different from a bilateral tolerance, which allows equal variation in both directions around the nominal (± value). It’s also not a fixed dimension, which would imply zero tolerance.

Unilateral tolerance means you permit variation in only one direction from the basic size. In practice, the part can be larger (or smaller) than the nominal, but not both directions. For example, a dimension specified as 50.00 +0.10 / -0.00 may range from 50.00 to 50.10, but never below 50.00. This is different from a bilateral tolerance, which allows equal variation in both directions around the nominal (± value). It’s also not a fixed dimension, which would imply zero tolerance.

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