CAL CAL - Certified Automotive Locksmith Lock Cylinder Service and Rekeying Questions and Answers 2 — Questions and Answers
Question 1: Which automotive lock component links the lock cylinder rotation to the actual locking/unlocking mechanism inside the door?
- The actuator rod or connecting rod (Correct answer)
- The key retainer spring
- The tumbler wafer
- The plug follower
Correct answer: The actuator rod or connecting rod
The actuator rod connects the rotating cylinder to the door's latch mechanism, translating cylinder rotation into a lock or unlock action.
Question 2: When an automotive lock cylinder is 'seized' and will not turn, what is the first recommended diagnostic step before attempting disassembly?
- Apply an appropriate lubricant such as dry graphite or Teflon spray and attempt to work the cylinder with a key (Correct answer)
- Drill the cylinder immediately
- Replace the entire door lock assembly
- Apply WD-40 heavily and leave it overnight
Correct answer: Apply an appropriate lubricant such as dry graphite or Teflon spray and attempt to work the cylinder with a key
Lubricating with a dry graphite or Teflon-based product and gently working the cylinder often resolves a seized lock without requiring destructive entry or full replacement.
Question 3: What is the purpose of the 'sidebar' found in some high-security automotive lock cylinders?
- It provides a secondary locking mechanism that must be satisfied in addition to standard tumblers, preventing picking and bumping (Correct answer)
- It connects the cylinder to the door panel
- It holds the key blank in the correct position during cutting
- It stores the key code in an encrypted format
Correct answer: It provides a secondary locking mechanism that must be satisfied in addition to standard tumblers, preventing picking and bumping
A sidebar is a secondary locking element that engages when the correct key is inserted, providing an additional layer of security beyond standard tumbler alignment.
Question 4: When measuring the depths of a cut on a decoded automotive key, a locksmith uses which tool?
- A key gauge or digital calipers referenced against the manufacturer's depth chart (Correct answer)
- A feeler gauge set
- An oscilloscope
- A micrometer set to millimeter resolution only
Correct answer: A key gauge or digital calipers referenced against the manufacturer's depth chart
A key gauge or digital calipers, compared against the manufacturer's bitting depth chart, accurately measures each cut position on a key.
Question 5: Which problem causes an automotive lock cylinder to turn but fail to operate the latch or ignition switch?
- A broken or disconnected actuator rod (Correct answer)
- Worn tumblers causing wrong key operation
- A seized plug due to lack of lubrication
- Incorrect key bitting
Correct answer: A broken or disconnected actuator rod
If the actuator rod is broken or disconnected, cylinder rotation cannot transfer to the latch or switch, so the cylinder turns freely without effect.
Question 6: What is the correct orientation of wafers when reassembling an automotive wafer-tumbler cylinder after rekeying?
- All wafers must be fully retracted to the shear line when the correct key is inserted, with no wafer extending beyond the plug diameter (Correct answer)
- Wafers should be installed randomly and adjusted with the key inserted
- Every other wafer should face in the opposite direction
- Wafers are not orientation-dependent and can be installed in any direction
Correct answer: All wafers must be fully retracted to the shear line when the correct key is inserted, with no wafer extending beyond the plug diameter
Correct reassembly requires that the appropriate key bitting retracts each wafer exactly to the shear line, with no wafer protruding into the shell when the correct key is fully inserted.
CAL CAL - Certified Automotive Locksmith Lock Cylinder Service and Rekeying Questions and Answers 2
Which automotive lock component links the lock cylinder rotation to the actual locking/unlocking mechanism inside the door?