CPL CPL High-Security & Specialty Lock Systems 2

Question 1

A BiLock cylinder uses which unique feature to achieve key control?

Accepted Answer

Two rows of pins that require simultaneous alignment from a key with two sets of bitting

Answer

BiLock cylinders have two parallel rows of pins, both of which must be simultaneously set by the corresponding bitting cuts on opposite sides of the key blade.

Question 2

What is 'key control' in the context of high-security lock systems?

Accepted Answer

The ability to restrict unauthorized key duplication through patented keyways or mechanical features

Answer

Key control refers to proprietary keyway patents and restricted key blanks that prevent duplication without authorization from the key system owner.

Question 3

Which attack method is a high-security lock cylinder's hardened steel inserts specifically designed to defeat?

Accepted Answer

Drill attacks targeting pin stack chambers

Answer

Hardened steel anti-drill pins or inserts are placed at drilling target points in the cylinder to break or redirect drill bits.

Question 4

When a high-security cylinder has a 'sidebar' mechanism, what does the sidebar do?

Accepted Answer

Provides a secondary locking element that must align independently of the shear line for the plug to rotate

Answer

A sidebar is an additional locking bar that only retracts when supplementary notches on the pins align, adding a second factor beyond the standard shear line.

Question 5

What is the purpose of a 'paracentric' keyway design in high-security lock systems?

Accepted Answer

To make picking more difficult by obstructing the insertion of pick tools into the keyway

Answer

Paracentric keyways have complex, winding profiles with projections that physically obstruct picking tools while still allowing the correct key to pass.

(CPL) Certified Professional Locksmith Practice Test

(CPL) Certified Professional Locksmith Practice Test

CPL CPL High-Security & Specialty Lock Systems 2