Forensic Science: Firearms and Toolmarks Analysis

What is a common feature of semi-automatic pistols?

Solid frame

Swing-out cylinder

Removable magazine (correct)

Break-top design

Which type of handgun has several firing chambers within a revolving cylinder?

Single shot pistol

Break-top revolver

Solid frame revolver

Revolver (correct)

In firearms, what is the purpose of rifling twist direction?

To concentrate shot when fired

To create a spark

To determine the number of lands and grooves

To impart unique characteristics to the bullet (correct)

What is the main function of the primer in a firearm?

To create a spark Signup and view all the answers

What do striations represent in firearm examination?

Minute scratches from metal on metal contact Signup and view all the answers

What technology is used for gunshot residue distance determination?

Griess test for lead detection Signup and view all the answers

Which feature distinguishes single action from double action firearms?

"Pulling the trigger performs two tasks" Signup and view all the answers

What distinguishes shotguns from rifles?

"Contain numerous ball-shaped projectiles" Signup and view all the answers

"National Integrated Ballistic Information Network (NIBIN)" primarily aids in:

"Imaging bullets and cartridge cases" Signup and view all the answers

What did Dr. Calvin Hooker Goddard adapt for simultaneous examinations?

Comparison microscope Signup and view all the answers

Which of the following is NOT a function of the Firearms Section?

Fingerprint analysis Signup and view all the answers

What is the primary difference between impressed and striated toolmarks?

Impressed toolmarks are caused by force and motion applied perpendicular to the plane, while striated toolmarks are caused by force and motion applied parallel to the plane. Signup and view all the answers

What is the validity of gunpowder residue detection according to the text?

Questionable validity and reliability Signup and view all the answers