CFL Tool Mark Analysis 2

Question 1

Which microscopy technique is most commonly used to compare striated tool marks in forensic locksmith casework?

Accepted Answer

Comparison microscopy

Answer

Comparison microscopy allows two specimens to be viewed simultaneously side-by-side, making it the standard tool for striation comparison.

Question 2

A 'negative impression' tool mark is best described as:

Accepted Answer

A three-dimensional impression where the tool shape is transferred into the substrate

Answer

Negative impression marks are three-dimensional indentations where the contours of the tool are pressed into the softer substrate.

Question 3

In tool mark analysis, 'individual characteristics' are defined as:

Accepted Answer

Random imperfections acquired during manufacture or use that distinguish one tool from all others

Answer

Individual characteristics are random, unique features such as nicks and scratches that allow a specific tool to be identified to the exclusion of all others.

Question 4

When examining cut copper wire in a forensic context, the examiner should focus primarily on which surface?

Accepted Answer

The cross-sectional cut face of the wire strands

Answer

The cross-sectional cut face of wire strands contains the striae and class characteristics left by the cutting tool's blade.

Question 5

Which of the following best explains why test marks should be made on the same type of substrate as the evidence?

Accepted Answer

Because substrate hardness affects the nature and depth of tool marks produced

Answer

Substrate hardness and material properties directly influence mark morphology, so test marks must be made on matching material for valid comparison.

(CFL) Certified Forensic Locksmith Practice Test

(CFL) Certified Forensic Locksmith Practice Test

CFL Tool Mark Analysis 2