CPL Key Systems & Key Control 2

Question 1

In a master key system, what term describes a key that operates all locks within a single department or zone?

Accepted Answer

Sub-master key

Answer

A sub-master key operates all locks within a specific department or zone, sitting between the change key and master key in the hierarchy.

Question 2

What is the primary purpose of a key control log in a commercial facility?

Accepted Answer

To track who has been issued which keys and when

Answer

A key control log tracks key issuance, returns, and accountability to maintain security and audit trails.

Question 3

Which key system feature prevents unauthorized key duplication at a hardware store?

Accepted Answer

Patent-protected keyway restrictions

Answer

Patent-protected keyways are restricted by law, preventing blanks from being sold to non-authorized dealers.

Question 4

A 'do not duplicate' stamp on a key is considered:

Accepted Answer

An honor system with no legal force

Answer

'Do not duplicate' markings are not legally enforceable and any locksmith or hardware store may still copy the key.

Question 5

In a large master key system, what is a 'grand master key' (GMK)?

Accepted Answer

A key that operates all locks across all groups in the system

Answer

A grand master key operates every lock in the entire system, sitting at the top of the key hierarchy.

(CPL) Certified Professional Locksmith Practice Test