FBI Forensic Science & Analysis 3

Question 1

A forensic examiner determines a bullet's caliber by measuring its diameter. A bullet measuring approximately 9mm in diameter is consistent with which of the following cartridges?

Accepted Answer

9mm Luger (9x19mm)

Answer

The 9mm Luger (9x19mm Parabellum) uses a bullet that is approximately 9mm (0.355 inches) in diameter, making it the direct match.

Question 2

When documenting a shooting scene, agents use the term 'entrance wound characteristic' to describe a feature. Which feature is most reliably associated with a contact gunshot entrance wound?

Accepted Answer

Muzzle contusion ring (stellate tearing)

Answer

Contact wounds show stellate (star-shaped) tearing caused by hot propellant gases entering tissue and expanding rapidly before exiting, creating a characteristic pattern.

Question 3

In a questioned document examination, an examiner is asked to determine if two signatures were written by the same person. Which class of handwriting characteristic is examined FIRST?

Accepted Answer

Class characteristics such as letter forms and proportions

Answer

Class characteristics, including general letter forms, spacing, and proportions, are assessed first to determine if signatures belong to the same broad writing system before examining individual characteristics.

Question 4

An FBI lab receives a soil sample from a suspect's boots. Which forensic discipline would analyze mineral composition and pollen content to associate the soil with a specific geographic location?

Accepted Answer

Forensic geology and palynology

Answer

Forensic geology analyzes mineral composition while palynology examines pollen and spores, together providing geographic location evidence through soil comparison.

Question 5

Which type of fingerprint pattern is the most common in the general population, accounting for approximately 65% of all fingerprints?

Accepted Answer

Loop

Answer

Loop patterns are the most common fingerprint pattern type, found in approximately 60-65% of the population, with whorls second at about 30-35%.

(FBI) Federal Bureau of Investigation Certified Marksman Practice Test

(FBI) Federal Bureau of Investigation Certified Marksman Practice Test

FBI Forensic Science & Analysis 3