Unit 5 Quiz Physics

A tool mark is defined as:

• Any scratch on an object
• A fingerprint on a tool
• A dent on metal
• Any pattern left by a tool coming into contact with a surface

An example of a class characteristic is:

• Scratch width unique to one screwdriver
• The flat head of a standard screwdriver
• A chipped blade
• Rust spot on a knife

In restoration, the obliterated area is first

• X-rayed
• Clean with acetone
• Soaked in water
• Covered with ink

Serial numbers on firearms are considered:

• Personal property
• Class characteristics
• Individual identifiers
• Decorative marks

A skilled forensic examiner can identify tool alteration by:

• Checking weight
• Hearing sound variations
• Comparing temperature changes
• Observing wear patterns and anomalies

Photographic documentation ensures:

• Permanent legal record
• Better reagent reaction
• Electrical grounding
• Temperature control

Forging serial numbers often results in:

• Raised impressions
• Misalignment or uneven depth
• Uniformity
• Transparency

A shovel used to dig in earth will have which type of toolmark

• Indentations
• Scrape marks
• Saw mark
• Drill holes

Which of the following can permanently destroy serial numbers?

• Overstamping another serial number
• Filing the impressions with a soft material
• Melting the surface area
• None of these

Which lighting technique is most useful for photographing shallow marks?

• Oblique lighting
• Infrared
• Fluorescent
• None of these