Locksmith Test #1

Question 1

Mushroom and Spool pins is:

Accepted Answer

Can hinder normal picking attempts

Answer

Mushroom and spool pins are types of security pins used in locks to increase their resistance to picking. Their irregular shapes create false sets when a pick attempts to manipulate them, making it difficult for a lock picker to determine the true shear line. This effectively hinders normal picking attempts by confusing the picker about the pin's actual position.

Question 2

The 10 cut wafer sidebar locks made by General Motors typically have:

Accepted Answer

A sum total of cut depths that must equal an even number

Answer

General Motors 10-cut wafer sidebar locks often incorporate specific keying rules for security and manufacturing. One such rule dictates that the sum total of all the key cut depths must equal an even number. This mathematical constraint serves as a security feature, making it harder to create unauthorized working keys without knowing this specific pattern.

Question 3

A MACS of a Kwikset Titan is:

Accepted Answer

4

Answer

MACS stands for Maximum Adjacent Cut Specification, which defines the maximum allowable difference in depth between any two adjacent cuts on a key. For Kwikset Titan locks, the MACS is 4. This specification is crucial for preventing key breakage due to excessively deep or shallow adjacent cuts and ensuring the smooth operation of the lock's pinning mechanism.

Question 4

A key in a knob lock whose default setting is that both knobs are locked and demand the use of a key to unlock it is

Accepted Answer

An institution lock

Answer

An institution lock, also known as an institutional function lock, is designed so that both the interior and exterior knobs are always locked. This means a key is required at all times for both entry and exit. This function is typically used in settings like storage rooms or specific institutional areas where strict control over access and egress is necessary.

Question 5

How many pin tumbler sets make up the average house door lock?

Accepted Answer

5 or 6

Answer

Most standard residential pin tumbler locks, commonly found on house doors, utilize either 5 or 6 pin tumbler sets. Each set corresponds to a specific cut on the key, and all pins must be aligned at the shear line for the lock to open. While high-security locks might have more, 5 or 6 is the average for typical household applications.

Locksmith Practice Test

Locksmith Practice Test

Locksmith Test #1