Correctional Officer Basic Training Practice Test 2025 – The All-in-One Guide to Master Your Exam Success!

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What type of lock is referred to as a master lock?

Electronic keycard lock

Combination dial lock

Black box type

A master lock typically refers to a specific type of locking mechanism that allows one key to operate multiple locks, while each individual lock can also be operated by its own unique key. In the context of the question, the black box type is often associated with older systems where a master key can override several locks without needing to go through the individual locking mechanisms.

This type of lock system is particularly useful in correctional facilities where security and control over various areas are necessary. It enables authorized personnel to access numerous secured locations with a single key, enhancing efficiency in monitoring and managing inmates and staff movement.

In contrast, electronic keycard locks use technology for access control, combination dial locks require a specific number code to open, and magnetic lock systems rely on magnetism to secure doors, none of which inherently embody the concept of a master lock in the traditional sense.

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Magnetic lock system

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