NEIEP Mechanics Practice Exam

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Prepare for the NEIEP Mechanics Exam with multiple choice questions, hints, and detailed explanations. Ace your test and advance your career!

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How many threads per inch are there on a 10-24 machine screw?

  1. 16

  2. 20

  3. 22

  4. 24

The correct answer is: 24

A 10-24 machine screw has a designation that indicates both its size and the number of threads per inch. The "10" refers to the nominal screw size, while the "24" indicates the pitch, meaning that there are 24 threads per inch on that screw. This is a standard measurement in the Unified Thread Standard (UTS) system, where the first number corresponds to the screw's diameter size, and the second number specifies the threads per inch. Therefore, understanding this thread designation is crucial for identifying the compatibility of screws with corresponding nuts, bolts, and tapped holes in mechanical applications.

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