Locksmith Test #3

Question 1

Which type of pick is employed when raking?

Accepted Answer

3/4

Answer

Raking is a lock-picking technique that involves rapidly moving a pick with multiple humps or contours across the pins while applying tension. The '3/4' pick, often referring to a rake like a Bogota or similar multi-humped design, is ideal for this method. Its shape allows it to manipulate several pins simultaneously, attempting to set them by chance.

Question 2

When a security pin is picked, what happens?

Accepted Answer

The keyway moves slightly forward

Answer

Security pins, such as spool, mushroom, or serrated pins, are designed to create false sets or give misleading feedback during picking. When a security pin is correctly manipulated, the plug (keyway) will often give a slight, characteristic 'false set' rotation, moving slightly forward. This indicates that a security pin is binding and needs further manipulation before the true shear line is reached.

Question 3

Which tension wrench is appropriate for high-security locks?

Accepted Answer

Lightweight

Answer

High-security locks often feature tighter tolerances and complex pin configurations, including various security pins. A lightweight or 'featherweight' tension wrench allows for very subtle and precise control over the rotational pressure applied to the plug. This delicate touch is crucial for feeling the nuanced feedback from security pins and avoiding over-tensioning, which can bind the pins excessively.

Question 4

In a lock, where are the pins located?

Accepted Answer

Top

Answer

In a standard pin tumbler lock, the pins are housed vertically within the cylinder. The driver pins are located in the upper part of the cylinder (the housing), and the key pins are in the lower part (the plug). When a key is inserted, it aligns the key pins and driver pins at the shear line, allowing the plug to turn.

Question 5

What purpose does the 3/4 pick serve?

Accepted Answer

Raking

Answer

The 3/4 pick, often a type of rake, is specifically designed for the raking technique in lock picking. Its undulating profile allows it to quickly manipulate multiple pins simultaneously by scrubbing it back and forth in the keyway. This method aims to 'bounce' the pins into their set positions by chance, making it a fast, non-precision picking approach.

Locksmith Practice Test

Locksmith Practice Test

Locksmith Test #3