North Carolina Locksmith Practice Exam

What term describes a keyway that has wards on each side to prevent picking?

1. Paracentric

2. Mortise

3. Profile

4. Retainer

The correct answer is: Paracentric

The term that describes a keyway with wards on each side to prevent picking is paracentric. Paracentric keyways are specifically designed with obstructions, known as wards, that disrupt the line of sight through the keyway, thereby making it more difficult for a picker to manipulate the pins within the lock without the proper key. This design enhances the security of the lock, as it requires a key that specifically counters these wards to align the pins for unlocking. In contrast, mortise refers to a type of lock that is installed within a mortise or pocket cut into the edge of a door, which does not inherently relate to the concept of wards preventing picking. Profile typically refers to the shape or design of the key or lock cylinder itself, also not specifically connected to the mechanism of wards. Retainer is more associated with components in a lock system that secure certain parts together, again, without directly indicating protection against picking. Thus, the specificity of paracentric as being geared towards inhibiting picking by incorporation of wards makes it the correct term in this context.