North Carolina Locksmith Practice Exam

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What term describes a spring-loaded device that fills gaps between the cylinder head and door?

Adjustable Mortise Cylinder
Gap Filler
Adjustable Collar
Cylinder Spacer

The correct answer is: Adjustable Collar

The term "Adjustable Collar" refers to a spring-loaded device designed to fill gaps between the cylinder head and the door. This component is crucial for ensuring that locks fit securely and operate effectively, preventing any undue movement or misalignment that could compromise the lock's function. An adjustable collar allows for flexibility in installation, accommodating variations in door thickness or cylinder placement. Its design helps to provide a snug fit and maintain the integrity of the locking mechanism, which is essential for security applications. The other terms mentioned do not accurately describe this specific device. A gap filler generally refers to a broader concept without the specific characteristics of an adjustable collar, while cylinder spacers may imply a rigid element rather than an adjustable one. An adjustable mortise cylinder pertains to a different type of lock mechanism, focusing more on the cylinder itself rather than the gap-filling aspect. Thus, "Adjustable Collar" is the most precise and relevant term in this context.