Question 516General Subjects - Assistant Engineer

70% to pass

Which of the following types of nuts would be best suited to use when it is important that a nut not work itself loose due to vibration?

ASquare nut

BCastellated nut

CCap nut

DWing nut

AI Explanation

The correct answer is B) Castellated nut. Castellated nuts are specifically designed to resist loosening due to vibration. They have a series of notches or slots cut around the top edge that allow a cotter pin or locking device to be inserted through the nut and bolt, preventing the nut from working itself loose. This makes castellated nuts the best choice when vibration is a concern, as required for many marine and industrial applications. The other options are not as well-suited for vibration resistance. Square nuts and cap nuts do not have any locking features, while wing nuts are designed for easy hand-tightening and loosening, rather than vibration resistance.

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Official Resources

46 CFR Machinery & Electrical 46 CFR Engineering USCG National Maritime Center

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