North Carolina Locksmith Practice Exam

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What is a primary feature of a Great Grand Master Key?

Operating only three cylinders
Operating one unique lock
Managing multiple groups with different master keys
Being a reset key

The correct answer is: Managing multiple groups with different master keys

A Great Grand Master Key is specifically designed to manage and operate multiple groups within a keying system, where each group has its own master key. This system allows for a hierarchical structure of key access, providing the ability to control various locks and groups of locks efficiently. The Great Grand Master Key can open all locks in the entire system, which includes both the master keys and the individual locks, making it a powerful tool in facility management. The other options do not accurately represent the functionality of a Great Grand Master Key. For instance, operating only three cylinders or one unique lock would significantly limit its utility and contradict its purpose of providing comprehensive access. Similarly, the term "reset key" does not align with the concept of a Great Grand Master Key, which is more about hierarchical control rather than resetting or altering locks. Thus, the definition of a Great Grand Master Key revolves around its capability to manage multiple groups, making the correct choice clear.