CML Safe & Vault Servicing Flashcards

What is manipulation in safe cracking terminology?

Answer: Opening a combination lock by feel and analysis without drilling

Manipulation is the non-destructive process of opening a combination lock by detecting subtle mechanical feedback to determine the combination.

A vault door's 'swing bolt' design means the bolts:

Answer: Pivot or rotate into locked position rather than extending linearly

Swing bolts rotate on a pivot point to engage the door frame, which is mechanically stronger against prying than linear bolts in some configurations.

What is the typical dial graph used for in safe manipulation?

Answer: Plotting contact points and parking points to identify wheel gate positions

A dial graph charts the resistance and contact points felt when dialing, helping the technician identify where each wheel's gate aligns with the fence.

Which component in a combination lock drops into the wheel gates to allow bolt retraction?

Answer: The fence/lever

The fence (or lever) drops into the aligned gates of all wheels simultaneously, allowing the bolt mechanism to retract and the safe to open.

What does a 'time lock' on a vault do?

Answer: Prevents the vault from being opened until a preset time has elapsed, regardless of whether the combination is known

A time lock uses clockwork mechanisms to physically prevent vault opening until a preset time period has passed, protecting against coercion during off-hours.

When a customer wants to change the combination on their existing UL-listed safe lock, a CML should verify:

Answer: The customer's identity and ownership, and record the new combination in a secure service log

Verifying identity and maintaining a secure record of combination changes protects both the customer and the locksmith from liability.