Exam Practice Questions And Correct

Ohio Locksmith Advanced Certification Exam Practice Questions And Correct Answers (Verified Answers) Plus Rationales 2025|2026 Q&A | Instant Download Pdf

• Which pin tumbler lock component prevents the plug from rotating

until the correct key is inserted?

• Driver pins
• Shear line
• Cylinder housing
• Key ward

Rationale: The shear line is created when key pins align with driver

pins, allowing plug rotation.

2. A locksmith uses a follower tool primarily when:

• Rekeying automotive locks
• Removing a cylinder plug without losing springs/pins 1 / 3

• Cutting a high-security key
• Adjusting a mortise cam

Rationale: A follower keeps pins/springs from spilling during plug

removal.

• Which key machine type is used to create keys without a code using

an existing key as a guide?

• Code machine
• Duplicating machine
• Tubular punch
• Laser tracer

Rationale: Duplicators copy an existing key by tracing it.

• A high-security lock that uses angled side cuts and secondary locking

elements is typically:

• Pin tumbler lock
• Disc detainer lock
• Medeco lock
• Wafer tumbler lock

Rationale: Medeco locks are known for angled cuts and sidebar

mechanisms.

• Which tool is used to decode wafer locks by reading depths directly?
• Tension wrench
• Plug spinner
• Wafer reader 2 / 3

• Shove knife

Rationale: Wafer readers measure wafers in lock to determine key

cuts.

• Which locking mechanism uses a sidebar to prevent plug rotation until

correct alignment occurs?

• Standard pin tumbler
• High-security pin tumbler
• Mortise cylinder
• Double-bitted lever

Rationale: Many high-security pin systems use a sidebar requiring

precise alignment.

• What is the purpose of a plug spinner?
• To remove a cylinder
• To rotate a picked lock plug to the correct position
• To decode a lock
• To lubricate keyways

Rationale: Plug spinners quickly rotate the plug after picking to avoid

relocking.

• Which keying system allows one key to open multiple locks with

different individual keys also working?

• Master ring system
• Master key system
• Sub-pin interlock
• / 3