North Carolina Locksmith Practice Exam

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Prepare for the North Carolina Locksmith Exam with engaging quiz materials that enhance your study experience. Access flashcards and multiple-choice questions crafted to boost your knowledge and confidence for the upcoming test.

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Which of the following best describes a 2-1/8" cross-bore?

A standard size for a lock installation
The maximum depth for a borehole
A specific type of mortise lock
An alternative bore size

The correct answer is: A standard size for a lock installation

The correct answer is rooted in the context of locksmithing and door preparation for lock installation. A 2-1/8" cross-bore is indeed recognized as a standard size for prepping doors to accommodate cylindrical locks. This dimension specifically refers to the diameter of the bore hole that is drilled through the door to allow the lock cylinder to fit properly. Understanding that the cross-bore is a standard size is crucial for locksmiths, as it ensures that the lock installed will align with the existing hardware and provide a secure fit. This standardization simplifies the process of installation and allows for compatibility with most commercially available locks. The other options do not accurately describe the cross-bore. For example, while boreholes can have specific depths, the 2-1/8" measurement specifically pertains to diameter rather than depth. Additionally, it does not specify a particular type of mortise lock, nor is it an alternative bore size; rather, it is a widely accepted standard in the industry.