NCCER Millwright Practice Exam

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Study for the NCCER Millwright Exam. Empower your knowledge with quizzes that enhance understanding, and multiple-choice questions that provide hints and explanations. Get fully prepared and ace your exam!

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What is used to measure the precise pitch of a threaded fastener?

Micrometer
Caliper
Thread gauge
Screw pitch gauge

The correct answer is: Thread gauge

The appropriate tool for measuring the precise pitch of a threaded fastener is the thread gauge. This tool is specifically designed to determine the pitch, which refers to the distance between threads. Using a thread gauge allows for exact measurements that are crucial, especially in applications where matching existing threads or ensuring compatibility with nuts and bolts is necessary. Thread gauges typically come in two forms: a simple notch gauge, which has varying notch sizes representing different pitches, and a more detailed gauge that can also measure the diameter of the fastener. This precision is essential in millwright applications where correct assembly and functionality are paramount. While a micrometer and caliper are excellent tools for measuring dimensions and might be used in conjunction with threaded fasteners, they do not specifically measure pitch. A screw pitch gauge serves a similar function to a thread gauge, often providing a way to quickly identify the pitch but is focused solely on screw threads. Thus, the thread gauge is the most direct and reliable method for measuring pitch on threaded fasteners.