North Carolina Locksmith Practice Exam

What is referred to as a master key for all combinations obtained by progressing four bitting positions?

1. Double Bitted Key

2. Four Pin Master Key

3. Single Bitted Key

4. Restricted Key

The correct answer is: Four Pin Master Key

A master key system is designed to allow a single key to operate multiple locks within a defined set of combinations, providing both security and convenience. In this case, a master key for all combinations obtained by progressing four bitting positions refers specifically to a system that uses four pins to create various combinations. The term "Four Pin Master Key" accurately describes a key that has been designed to engage with four distinct pins within the locks. This configuration allows the key to access a range of locks set to different combinations based on how the pins are arranged. Each pin can be in various positions, meaning that the possible combinations increase significantly, and the master key can operate multiple locks with varying bitting patterns based on this system. In contrast, a double bitted key features cutting on both sides of the blade, allowing it to operate in a different context and typically does not apply specifically to master key systems. A single bitted key, while it may also function within a locking system, does not support the concept of a master key across multiple combinations derived from four pin positions. A restricted key involves additional features to limit duplication but does not inherently function as a master key for a set range such as the four bitting positions mentioned. Thus, the understanding of master key