North Carolina Locksmith Practice Exam

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Which part of the combination lock should always be lubricated?

Wheel Pack
Wheel Post
Drive Pin
Drive Cam

The correct answer is: Wheel Post

In a combination lock, the wheel post is crucial for the proper functioning of the lock mechanism. The wheel post connects the rotating wheels to the rest of the lock assembly, allowing the input of the combination. Regular lubrication of the wheel post helps to ensure that the wheels can turn smoothly and freely, thus maintaining the integrity and reliability of the locking mechanism. Lubrication reduces friction and wear, which can lead to jamming or malfunctions. Proper maintenance, including the lubrication of the wheel post, is essential for ensuring the longevity and effectiveness of the lock system. The other components, while important, do not require the same attention to lubrication to maintain their functionality. The wheel pack consists of the combination wheels and should not be lubricated directly as it can cause debris to collect; the drive pin is typically designed to fit tightly and engage securely, which may not necessitate lubrication; and the drive cam operates based on mechanical engagement rather than needing regular lubrication.