Locksmith Advanced Topics 3

Question 1

Which safe lock type uses a relocker that activates if the safe dial or lock is attacked?

Accepted Answer

Mechanical relocker

Answer

A mechanical relocker is a secondary locking device that engages when glass or metal relocker plates are broken during an attack, making the bolt work immovable.

Question 2

In an electrified door hardware installation, what is the function of a 'request to exit' (REX) device?

Accepted Answer

It signals the access control system to unlock the door for egress

Answer

A REX device, such as a motion sensor or push bar, sends a signal to the access control panel to release the door lock so occupants can exit freely.

Question 3

A locksmith decodes a padlock using the 'shackle shimming' technique. What does this exploit?

Accepted Answer

The gap between the shackle and the locking lug to bypass the latch

Answer

Shimming inserts a thin metal shim into the shackle gap to depress the spring-loaded latch, allowing the shackle to release without a key.

Question 4

What is the purpose of 'key control' in a master key system?

Accepted Answer

Preventing unauthorized duplication of keys in the system

Answer

Key control involves using patented keyways, restricted blanks, and authorization records to ensure only authorized personnel can have duplicate keys made.

Question 5

When installing a door closer, what adjustment controls the speed of the door during the final few degrees of closing?

Accepted Answer

Latch speed valve

Answer

The latch speed (or latching) valve controls how quickly the door moves in the final inches of closure, allowing it to latch without slamming.

Locksmith Practice Test

Locksmith Practice Test

Locksmith Advanced Topics 3