CFL Lock Identification & Key Systems 3

Question 1

During a crime scene examination, a deadbolt cylinder shows a cracked plug and metal burrs on the plug face. The most likely forced entry method is:

Accepted Answer

Cylinder pulling

Answer

Cylinder pulling uses a slide hammer or dent puller to physically extract the plug from the cylinder, causing cracking, burring, and deformation of the plug face.

Question 2

A warded lock uses internal obstructions (wards) to prevent incorrect keys from turning. Forensically, what is the primary weakness a locksmith would note?

Accepted Answer

A skeleton key with all non-essential metal removed can bypass most ward configurations

Answer

Skeleton keys have material filed away to avoid the wards, allowing them to rotate the bolt mechanism in many warded locks regardless of specific ward patterns.

Question 3

High-security lock standard ANSI/BHMA Grade 1 specifies resistance to which attack that is particularly relevant in forensic cases?

Accepted Answer

Pick and tension tool manipulation

Answer

ANSI/BHMA Grade 1 standards include testing for pick resistance, among other physical attacks, making this rating forensically relevant for assessing expected attack resistance.

Question 4

A locksmith examines a padlock shackle with a clean, flat cut through the metal. This pattern indicates the use of:

Accepted Answer

A bolt cutter

Answer

Bolt cutters produce a clean, opposing shear cut on both sides of the shackle, leaving a distinctive flat, pinched cut pattern.

Question 5

The term 'key control' in a master key system refers to:

Accepted Answer

Restricting unauthorized key duplication through patented keyways and controlled distribution

Answer

Key control systems use patented keyways, restricted blanks, and authorization protocols to prevent unauthorized key copying and maintain a documented chain of key issuance.

(CFL) Certified Forensic Locksmith Practice Test

(CFL) Certified Forensic Locksmith Practice Test

CFL Lock Identification & Key Systems 3