Other Skilled Trades Locksmithing 2 — Questions and Answers
Question 1: What is a master key system?
- An electronic credential management platform
- A key hierarchy where one master key opens all locks while individual keys open only specific locks (Correct answer)
- A universal key that opens any lock regardless of manufacturer
- A computerized lock management system
Correct answer: A key hierarchy where one master key opens all locks while individual keys open only specific locks
A master key system configures locks so a master key opens all locks in a building while individual change keys only operate their own specific lock.
Question 2: How does a bump key open a pin tumbler lock?
- By tracing the key bitting from the lock face
- By using impact to momentarily jump pins to the shear line (Correct answer)
- By applying hydraulic pressure to the plug
- By manipulating wafers in sequence
Correct answer: By using impact to momentarily jump pins to the shear line
A bump key is cut to maximum depth on all bittings; striking it while applying tension causes the pins to jump momentarily to the shear line, allowing the plug to rotate.
Question 3: What is the function of the cam in a lock mechanism?
- To hold the door closed against the strike
- To transmit plug rotation to the latch or bolt mechanism (Correct answer)
- To retain the driver pins in the shell
- To guide the key into the keyway
Correct answer: To transmit plug rotation to the latch or bolt mechanism
The cam is attached to the back of the plug and rotates with it to actuate the latch, bolt, or other mechanism the lock controls.
Question 4: What characterizes a high-security lock?
- Any lock with a retail price above a certain threshold
- A lock with features resistant to picking, drilling, and unauthorized key duplication (Correct answer)
- A lock that simply has more pin stacks than standard
- Any lock with an electronic component
Correct answer: A lock with features resistant to picking, drilling, and unauthorized key duplication
A high-security lock incorporates hardened steel inserts, anti-pick pins, tight tolerances, and patented keyways that resist picking, drilling, and unauthorized key duplication.
Question 5: What is the shear line in a pin tumbler lock?
- The line where the key blade enters the keyway
- The gap between the plug and shell where driver and key pins must align to allow rotation (Correct answer)
- The profile of the keyway cut into the plug
- The point of maximum spring tension in the pin stack
Correct answer: The gap between the plug and shell where driver and key pins must align to allow rotation
The shear line is the interface between the rotating plug and the stationary shell; when all driver pins are lifted exactly to this line, the plug rotates freely.
Question 6: What is a warded lock?
- A modern high-security lock used in commercial applications
- An older lock that uses fixed obstructions the key must navigate to rotate the bolt (Correct answer)
- A digital lock requiring a warden code
- A padlock with a reinforced shackle guard
Correct answer: An older lock that uses fixed obstructions the key must navigate to rotate the bolt
A warded lock uses fixed projections inside the keyhole that block incorrect keys; only a key with matching cutouts can navigate the wards and turn the lock.
Other Skilled Trades Locksmithing 2
What is a master key system?