Safe Manipulation & Lock Opening Flashcards
7 cards from real CPL practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Safe Manipulation & Lock Opening flashcards as text
When manipulating a three-wheel combination lock, the locksmith graphs the lock by charting dial positions. What pattern indicates that a true gate has been found on one wheel?
Answer: The graph shows a dip or valley at consistent dial positions when comparing multiple graphing passes
True gates produce repeatable low-resistance points (dips/valleys) in the graph at consistent dial positions across multiple passes, distinguishing them from random variation.
A safe customer reports their electronic combination lock displays an error code but the battery is new. What is the FIRST step a locksmith should take?
Answer: Consult the manufacturer's documentation or technical support to interpret the error code before any physical intervention
Error codes on electronic locks are diagnostic indicators, and consulting manufacturer documentation first prevents unnecessary damage and guides the correct repair path.
The 'Sparrows' or 'Klori' method of safe manipulation refers to:
Answer: A systematic graphing approach that maps the contact area for each wheel across the full dial range
This systematic manipulation method involves mapping contact areas for all wheels across the entire dial to identify gate positions through overlapping contact region analysis.
Which of the following best describes the difference between a 'torch attack' and a 'thermal lance attack' on a safe?
Answer: A torch attack uses controlled flame cutting, while a thermal lance uses a burning iron pipe filled with metal rods that burns through almost any material
A thermal lance burns at extremely high temperatures and can cut through hardplate, concrete, and high-alloy steels that resist conventional torch cutting.
When changing a combination on a Sergeant & Greenleaf Group 2 lock, which step is critical to avoid setting an unknown combination?
Answer: Verifying the new combination dials correctly and opens the lock BEFORE closing the safe door
Always test the new combination with the door open before closing to ensure the change was made correctly and avoid an unintentional lockout.
What is the purpose of a 'relocker bypass tool' used during certain safe openings?
Answer: It is inserted through a drilled hole to physically push or release a triggered relocker bolt, allowing the safe to open
A relocker bypass tool is inserted through a precision-drilled hole to mechanically disengage a triggered relocker, allowing the main bolt work to retract.
In a safe with a Type 1 UL-listed electronic lock, what does the 'duress code' feature allow?
Answer: It opens the safe normally while simultaneously sending a silent alarm signal to a monitoring service
A duress code opens the safe normally to avoid escalating a threat situation while silently alerting a security monitoring service that the user is under duress.