Locksmith Advanced Topics 4

Question 1

What is 'decoding' in the context of locksmithing?

Accepted Answer

Determining the bitting of a lock without the original key

Answer

Decoding is the process of determining the correct cut depths of an existing lock's key, typically using a decoder tool, impressioning, or disassembly.

Question 2

In automotive key programming, what does TPMS stand for, and why is it relevant to a locksmith?

Accepted Answer

Tire Pressure Monitoring System — must not be disrupted during battery disconnect

Answer

TPMS sensors can lose calibration if the vehicle battery is disconnected during programming, a precaution locksmiths must note when working on modern vehicles.

Question 3

A customer has a UL-listed TL-30 rated safe. What does 'TL-30' certify?

Accepted Answer

The safe resists tool attack on the door for a net 30 minutes

Answer

TL-30 is a UL burglary rating indicating the safe body and door withstood a net 30 minutes of tool attack using hand tools, electrical tools, and drills.

Question 4

What is the function of the 'anti-drill plate' inside a high-security lock cylinder?

Accepted Answer

It contains hardened steel balls or plates to destroy drill bits

Answer

Anti-drill plates are made of hardened steel or contain carbide inserts that spin or shatter drill bits before they can destroy the pin stacks.

Question 5

When using a code machine to cut a key by code, what is the 'direct digit system'?

Accepted Answer

A system where the code number directly corresponds to the cut depth

Answer

In the direct digit system, each digit in the key code directly represents a specific cut depth from the manufacturer's bitting depth table.

Locksmith Practice Test

Locksmith Practice Test

Locksmith Advanced Topics 4