CML CML Safe & Vault Servicing 1 — Questions and Answers
Question 1: What is the first step a CML technician should take when a customer reports a safe with an unknown combination?
- Drill immediately at the dial spindle
- Verify ownership documentation before attempting any entry (Correct answer)
- Remove the door hinges to gain access
- Contact the safe manufacturer for a backdoor code
Correct answer: Verify ownership documentation before attempting any entry
Verifying ownership documentation protects the locksmith from liability and ensures legal authorization before any entry attempt.
Question 2: Which safe lock type uses a relocker mechanism that activates when the glass plate is broken?
- Group 1 combination lock
- Electronic keypad lock
- Glass relocker (Correct answer)
- Biometric lock
Correct answer: Glass relocker
A glass relocker is a secondary locking mechanism that triggers when an intruder attempts to drill or punch through the lock area.
Question 3: What UL rating is required for a safe to be classified as TL-15?
- Withstands 15 minutes of attack with common hand tools only
- Withstands 15 minutes of attack with common and electric tools (Correct answer)
- Withstands 15 minutes of torch cutting
- Withstands 15 hours of manipulation
Correct answer: Withstands 15 minutes of attack with common and electric tools
UL TL-15 means the safe resists 15 net working minutes of attack using common hand tools, electrical tools, and picking tools.
Question 4: When drilling a safe, which area is typically targeted to bypass the combination lock?
- The door hinge side
- The bolt area on the locking side
- The drill point above the dial to access the lock lever pack (Correct answer)
- The back wall of the safe
Correct answer: The drill point above the dial to access the lock lever pack
Drilling above the dial provides access to the lock's lever pack or wheel pack, allowing the technician to view and align the gates.
Question 5: A Group 2 combination lock differs from a Group 1 lock primarily in that it:
- Has more wheels
- Offers lower manipulation resistance under UL standards (Correct answer)
- Uses a digital display
- Requires a key override
Correct answer: Offers lower manipulation resistance under UL standards
Group 2 locks meet a lower UL standard for manipulation resistance compared to Group 1 locks, which require significantly more time to manipulate.
Question 6: What is 'scoping' in the context of safe servicing?
- Measuring the safe's external dimensions
- Using a borescope or fiber optic camera through a drill hole to view internal components (Correct answer)
- Assessing fire rating with a thermal scope
- Reviewing service records before opening
Correct answer: Using a borescope or fiber optic camera through a drill hole to view internal components
Scoping involves inserting a borescope through a small drill hole to visually inspect the lock's internal wheel gates and alignment.
CML CML Safe & Vault Servicing 1
What is the first step a CML technician should take when a customer reports a safe with an unknown combination?