North Carolina Locksmith Practice Exam

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What is the term for a spindle assembly designed so its two halves turn independently?

Swivel Spindle
Fixed Spindle
Rotary Spindle
Independent Spindle

The correct answer is: Swivel Spindle

The term "Swivel Spindle" refers to a spindle assembly that allows its two halves to turn independently of each other. This design enables a flexible movement, which is particularly beneficial in applications where simultaneous or separate rotation is needed, such as door handles or mechanisms that require a degree of freedom between the components. This type of spindle is often utilized in locks and doors where the locking mechanism and the door handle must operate without interfering with one another. The independent movement facilitates smoother operation and enhances usability, making it easier for users to engage or disengage the locking mechanism without affecting the handle's position. The other terms, while they may sound plausible, do not accurately describe the functionality of a spindle assembly that rotates independently. A Fixed Spindle would not allow for any movement between its parts, a Rotary Spindle typically denotes a type of spindle that rotates as a whole, and the term Independent Spindle is less commonly used in the locksmithing context to describe this specific assembly.