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A rim cylinder is secured in place by which of the following?

  1. Two screws from the back of the cylinder

  2. One locking bolt

  3. A spring mechanism

  4. Detachable clips

The correct answer is: Two screws from the back of the cylinder

A rim cylinder is secured in place primarily through the use of two screws that are typically fastened from the back of the cylinder into the mounting surface, such as a door. These screws hold the cylinder firmly in position, preventing it from being pulled out or manipulated from outside the door. The design allows for easy installation and replacement of the rim cylinder, which is commonly used in mortise locks. Understanding the mechanism of a rim cylinder is essential for locksmiths, as it is a prevalent component in many types of locking systems. It is important to note that while other locking mechanisms like locking bolts, spring mechanisms, and detachable clips may play roles in different types of locks, they do not serve the primary function of securing a rim cylinder in place.