Mortise cylinders are commonly used in motel doors and aluminum framed doors on commercial buildings.

Mortise cylinders are commonly used in motel doors and aluminum framed doors on commercial buildings.

• A. Mortise cylinder
• B. Knob cylinder
• C. Rim cylinder
• D. Interchangeable core

Answer: (A)

The main idea here is matching the door construction with the right type of cylinder. Mortise cylinders are designed to fit into a recessed pocket inside the door that also houses a mortise lock body. This setup is common in motel doors and in aluminum-framed commercial doors because it provides a compact, secure, heavy-duty hardware arrangement that these doors typically require. Knob cylinders are paired with residential-style knob or lever locks, which isn’t what motel or many commercial aluminum-frame doors use. Rim cylinders sit on the surface with rim locks, which are generally less secure and less common for exterior commercial openings. An interchangeable core is a feature inside some cylinders for quick rekeying, not a distinct cylinder type used specifically for motel or aluminum-frame doors. So the mortise cylinder best fits the described doors.

The main idea here is matching the door construction with the right type of cylinder. Mortise cylinders are designed to fit into a recessed pocket inside the door that also houses a mortise lock body. This setup is common in motel doors and in aluminum-framed commercial doors because it provides a compact, secure, heavy-duty hardware arrangement that these doors typically require.

Knob cylinders are paired with residential-style knob or lever locks, which isn’t what motel or many commercial aluminum-frame doors use. Rim cylinders sit on the surface with rim locks, which are generally less secure and less common for exterior commercial openings. An interchangeable core is a feature inside some cylinders for quick rekeying, not a distinct cylinder type used specifically for motel or aluminum-frame doors. So the mortise cylinder best fits the described doors.