Intro to Millwright Practice Exam

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True or False: The thimble on an inside micrometer with English (SAE) measurements is marked in 25 increments, each equal to .001 inch.

True
False
Not Applicable
Indeterminate

The correct answer is: True

The statement is true because inside micrometers designed for English (SAE) measurements typically have thimbles that are marked in increments of .001 inch. This allows for precise measurements, as each increment represents a very small and precise change in measurement. When using an inside micrometer, the ability to read these fine increments ensures accuracy when measuring the internal diameters of various components. The design of the thimble is essential for millwrights who rely on precise measurements to ensure proper fitting and functioning of machinery parts. This accuracy is vital in avoiding errors that could lead to improper assembly or function of mechanical systems.