CPL CPL High-Security & Specialty Lock Systems 1 — Questions and Answers
Question 1: What design feature of Medeco locks provides both key control and pick resistance?
- Angled and rotating pins that require correct key bitting height and rotation (Correct answer)
- Double-sided key bitting only
- A magnetic sidebar mechanism
- Dimple key cuts exclusively
Correct answer: Angled and rotating pins that require correct key bitting height and rotation
Medeco cylinders use angled cuts that rotate pins to align a sidebar, requiring both correct height bitting and rotational alignment to open.
Question 2: Mul-T-Lock cylinders achieve high security primarily through which mechanism?
- A telescoping pin-within-pin system that doubles the number of required alignments (Correct answer)
- An electronic RFID verification step
- Magnetic disc tumblers only
- Side-milled key channels
Correct answer: A telescoping pin-within-pin system that doubles the number of required alignments
Mul-T-Lock's telescoping pin system means each pin stack has an inner pin inside the driver pin, requiring two-depth alignment per position.
Question 3: Abloy disc detainer locks are resistant to picking primarily because:
- They use rotating discs with no springs, eliminating the feedback needed for traditional picking (Correct answer)
- They have magnetic pins
- They use electronic verification
- They have more pins than standard cylinders
Correct answer: They use rotating discs with no springs, eliminating the feedback needed for traditional picking
Abloy's springless rotating disc design provides no tactile feedback for picking tools, making traditional picking techniques ineffective.
Question 4: What is the defining characteristic of a dimple key lock compared to a standard pin tumbler lock?
- The key has dimples milled into its flat faces rather than cuts along its edge (Correct answer)
- The key is double-sided with edge cuts only
- The key operates magnetic tumblers
- The key has no bow (handle) section
Correct answer: The key has dimples milled into its flat faces rather than cuts along its edge
Dimple keys have precisely milled dimples on the flat blade surface, allowing the lock to use more pin positions and be used in either orientation.
Question 5: High-security locks that comply with ANSI/BHMA Grade 1 must withstand a minimum of how many open/close cycles?
- 250,000 cycles (Correct answer)
- 100,000 cycles
- 500,000 cycles
- 50,000 cycles
Correct answer: 250,000 cycles
ANSI/BHMA Grade 1 commercial hardware must withstand a minimum of 250,000 operating cycles to meet durability requirements.
Question 6: Which UL listing indicates that a lock cylinder has been tested and certified for pick resistance and attack resistance?
- UL 437 (Correct answer)
- UL 305
- UL 768
- UL 2050
Correct answer: UL 437
UL 437 is the standard for high-security lock cylinders, testing resistance to picking, drilling, pulling, and other attack methods.
CPL CPL High-Security & Specialty Lock Systems 1
What design feature of Medeco locks provides both key control and pick resistance?