Which of the following is NOT a general type of locking method?

The reason "Square lock" is not considered a general type of locking method is because it refers to a specific design or configuration of a lock rather than a widely recognized category or method of locking. In the context of locking methods, general types typically refer to more common mechanisms used across various applications, such as keys, screws, or specialized forms like the rotor jaw and chisel check.

Rotor jaw, for example, pertains to a locking mechanism often used in applications requiring secure clamps, where the motion of the lock enhances gripping. A screw lock is utilized in numerous contexts for its straightforward design, allowing components to be fastened securely. Chisel check, while perhaps less commonly known, still fits within categories of locks that are used for specific operational needs.

In contrast, while a square lock does enable a function of security and locking, it does not fit into the general methodologies of locking mechanisms that are typically categorized for broader applications.