CFL Safe & Vault Technologies 3 — Questions and Answers
Question 1: A Group 2 combination lock as rated by UL 768 is required to resist manipulation for a minimum of how many hours?
- 10 hours
- 20 hours (Correct answer)
- 40 hours
- 100 hours
Correct answer: 20 hours
UL 768 Group 2 requires the combination lock to resist a skilled manipulation attempt for a minimum of 20 man-hours.
Question 2: What distinguishes a UL TL-15 rated safe from a UL TL-30 rated safe?
- TL-15 resists torch attacks; TL-30 does not
- TL-15 is tested for 15 minutes; TL-30 is tested for 30 minutes of net working time (Correct answer)
- TL-15 uses hand tools only; TL-30 uses power tools only
- TL-30 is a fire rating; TL-15 is a burglary rating
Correct answer: TL-15 is tested for 15 minutes; TL-30 is tested for 30 minutes of net working time
Both TL-15 and TL-30 are tested with power tools, but TL-15 must resist for 15 minutes and TL-30 for 30 minutes of net working time.
Question 3: What term describes the hardened steel insert embedded in a safe body to deflect drill bits away from critical components?
- Glass relocker
- Hardplate (Correct answer)
- Anti-fish baffle
- Fence barrier
Correct answer: Hardplate
A hardplate is a plate of hardened steel or carbide material positioned to deflect or destroy drill bits aimed at the lock or boltwork.
Question 4: In a forensic examination of a safe, evidence of 'pulling' would most likely show damage to which component?
- The door hinges
- The combination dial and spindle area (Correct answer)
- The floor anchor bolts
- The boltwork locking bars
Correct answer: The combination dial and spindle area
Pulling involves attaching a puller to the combination dial or spindle to extract the spindle and expose the lock mechanism, leaving characteristic damage around the dial area.
Question 5: What is a time-delay feature in an electronic safe lock designed to prevent?
- Unauthorized duplication of the combination
- Opening by coercion — forcing the user to open immediately (Correct answer)
- Power drain attacks on the lock battery
- Manipulation of the mechanical relocker
Correct answer: Opening by coercion — forcing the user to open immediately
Time-delay forces a mandatory waiting period before the lock will open after a correct code, making robbery-by-coercion impractical because the criminal must wait in a monitored environment.
Question 6: Which vault door feature is specifically designed to prevent the door from being forced open by hydraulic spreading of the frame?
- Multiple active bolts extending into the door frame on all four sides (Correct answer)
- A glass relocker mounted on the door interior
- Hardened steel hinge protectors
- A time-delay electronic lock
Correct answer: Multiple active bolts extending into the door frame on all four sides
Four-way boltwork (bolts extending top, bottom, and both sides) distributes stress so that no single frame section can be spread open by hydraulic jacks.
Question 7: A forensic locksmith encounters a safe with a UL TRTL-30 rating. What does the 'TR' prefix indicate?
- The safe resists torch and carbide cutting tools
- The safe has been tested at tropical temperatures and humidity
- The safe provides torch-resistant construction in addition to tool resistance (Correct answer)
- The safe resists torque attacks on the boltwork
Correct answer: The safe provides torch-resistant construction in addition to tool resistance
TRTL means the container resists both torch (TR) and tool (TL) attacks during the rated time period, making it a significantly higher security level than TL alone.
CFL Safe & Vault Technologies 3
A Group 2 combination lock as rated by UL 768 is required to resist manipulation for a minimum of how many hours?