CML Keying Systems & Key Control 2

Question 1

In a master key system, what does the term 'cross keying' refer to?

Accepted Answer

Keying a lock to operate under two or more keys that are not in a hierarchical relationship

Answer

Cross keying allows a lock to be operated by two or more keys that are not master keys of each other, used for shared access areas like restrooms.

Question 2

What is the maximum number of change keys typically possible under a single master key in a standard pin tumbler system using 6 pins?

Accepted Answer

120

Answer

With 6 pins and standard progression, the theoretical maximum is 120 change keys under a single master key.

Question 3

A 'rotating master key system' is primarily used to:

Accepted Answer

Periodically change the master key without rekeying individual locks

Answer

A rotating master key system allows the master key to be changed periodically for security reasons without the need to rekey every lock in the system.

Question 4

What is a 'key section' in the context of key control?

Accepted Answer

The unique profile or cross-sectional shape of the key blade that restricts duplication to authorized dealers

Answer

The key section is the cross-sectional profile of the key blade that matches a specific keyway, and proprietary sections help restrict unauthorized key duplication.

Question 5

In a master key system, a 'maison keying' arrangement is most commonly found in:

Accepted Answer

Residential apartment complexes

Answer

Maison keying is used in apartment buildings where each tenant's key opens their own unit plus common areas, while the master key opens all units.

(CML) Certified Master Locksmith Practice Test

(CML) Certified Master Locksmith Practice Test

CML Keying Systems & Key Control 2