CRL Master Key Systems & Key Control 1

Question 1

In a master key system, what is the function of a 'change key'?

Accepted Answer

It opens only one specific lock within the system

Answer

It opens every lock in the system

Answer

It is used to re-key all locks simultaneously

Answer

It overrides all other keys in the system

Question 2

What term describes a key that operates all locks within a specific group or section of a master key system?

Accepted Answer

Master key

Answer

Change key

Answer

Control key

Answer

Grand master key

Question 3

In a master key system hierarchy, what does a 'Grand Master Key' (GMK) operate?

Accepted Answer

Multiple groups or sections, each of which has its own master key

Answer

Only executive suites and restricted areas

Answer

Only one specific high-security lock

Answer

A duplicate set of locks kept in emergency storage

Question 4

What does 'MACS' stand for in master key system design?

Accepted Answer

Maximum Adjacent Cut Specification

Answer

Master Access Control System

Answer

Multiple Actuator Cylinder Standard

Answer

Master Alignment and Cut Setting

Question 5

Which key occupies the apex of a complex master key system hierarchy and operates every lock in the entire system?

Accepted Answer

Top master key

Answer

Sub-master key

Answer

Grand master key

Answer

Control key

Question 6

What is a 'sub-master key' in a master key system?

Accepted Answer

A key that operates a defined subset of locks within a larger master key group

Answer

An emergency copy of the master key stored in a safe

Answer

A key used only in basement or sub-level areas

Answer

A reduced-security version of the master key

Question 7

What is the primary purpose of a 'key control' system in a locksmith's security recommendations?

Accepted Answer

To prevent unauthorized key duplication

Answer

To reduce the overall cost of key duplication

Answer

To ensure all keys are color-coded for easy identification

Answer

To standardize key sizes across all locks in a facility