CML Safe & Vault Servicing Flashcards

What does the fire rating label 'UL Class 350-1 hour' mean on a safe?

Answer: The safe interior will stay below 350°F for at least 1 hour in a fire

UL Class 350-1 Hour means the interior temperature will not exceed 350°F during a one-hour fire test, which is the threshold that protects paper documents.

Which type of vault door locking mechanism uses multiple large bolts that extend in several directions simultaneously?

Answer: Four-way bolt work

Four-way bolt work extends bolts in four directions (top, bottom, left, right) simultaneously, dramatically increasing forced-entry resistance.

When servicing a Sergeant & Greenleaf (S&G) three-wheel combination lock, what is the standard method to set a new combination?

Answer: Use the change key inserted in the back of the lock to set each wheel's gate position

S&G combination locks use a change key inserted through the back or a special procedure to rotate each wheel's gate to the new combination numbers.

What is the purpose of a 'day gate' feature found on some high-security combination locks?

Answer: Enables the safe to open with only a partial combination rotation for quick daytime access

A day gate allows authorized users to open the safe with an abbreviated dialing procedure during business hours, while the full combination reactivates after hours.

Which standard governs the residential security container (RSC) rating for burglary-resistant safes?

Answer: UL 687

UL 687 is the standard for burglary-resistant safes, while the RSC (Residential Security Container) rating is a subset for consumer-grade units tested against hand tool attacks.

After drilling a safe and completing repairs, a CML should:

Answer: Plug the drill hole with a hardened steel insert and document the service

Best practice requires plugging drill holes with hardened steel to restore security, then documenting the service entry for liability and warranty purposes.