North Carolina Locksmith Practice Exam

What type of key is derived from progressing four bitting positions?

1. Grand Master Key

2. Great Grand Master Key

3. Four Pin Master Key

4. Build-Up Pin

The correct answer is: Four Pin Master Key

The correct answer is derived from the concept of a key system that utilizes bitting positions to create varying key combinations. In the context of locksmithing, bitting positions refer to the specific cuts or notches that are made on a key to determine how it will interact with the pins inside a lock. A key derived from progressing four bitting positions would typically have variations in the depths and spacing of its cuts that correspond to four different pin positions within a lock. This means that the key can be used to operate a lock that is designed to take advantage of four unique depths, allowing for a certain degree of security and flexibility. The other choices involve more complex key management systems or other key configurations. For example, a grand master key system allows for multiple levels of access, while a great grand master key extends that concept further, adding additional layers of complexity. Similarly, a build-up pin is a technical term that refers to a specific type of pin utilized in cylinder locks, rather than a key derived from bitting positions. Each of these alternatives plays a different role in locksmithing, but the direct connection to four bitting positions points specifically to the concept of a four-pin master key.