Module 4 Examination

These marks are more or less found on the anterior portion of the fired bullets or slugs and are caused by the forward movement of the build before it rotates as required by riflings and common on a bullet fired at a revolver.

At the scene of the crime, the picking up of a weapon by its barrel with a pencil or stick in order to protect fingerprints is one that "must be avoided".

In pistols, the empty shells are found in a cylindrical magazine chamber after the fire, but in cases of revolvers, the empty shells are driven out a weapon after the shot to give way to live cartridge to be in the firing chamber.

This is the process of barrel production, creating a rough hole of uniform diameter on the selected metal, thus producing several scars and scratches on its interior surface that becomes permanent.

No two rifled barrels, even those manufactured in succession, will have identical striation markings.

They are found on the cylindrical portion of the fired bullets or slugs and are caused by the riflings inside the barrel.

In bullet identification lead bullet gives clearer striated marks than that a jacketed bullet?

This is a forensic science discipline that has as its primary concern the determination of whether or not a toolmark was produced by a particular tool. This determination is based on the class and individual marks in a given toolmark, which are products of the manufacturing process.

What part of the firearms must be marked by the investigator?

If bullets are found at the crime scene, what are things that need to be noted?

Which of the statement below is correct?

This mark is produced when a tool is placed against another object and moved parallel to and across the object with pressure applied.

All barrels produced by a single manufacturer are microscopically alike or identical as the internal surface of the bore or barrels all possess the same characteristics of their own;

The number of land and grooves is a (n) ___________________ characteristics of a barrel?

Can there be chamber marks when a cartridge had just been drawn from the chamber by pulling the slide of the pistol without firing it?

Which of the following statement in the choices are the foundational techniques in "toolmark identifications"?

The clothing of a firearm victim must be carefully preserved so as to prevent damage or disruption to powder residues deposited around a bullet or shotshell hole.

Discharged evidence bullet should be marked on the base or nose.

When marks produced a contour in the process of interaction that produces marks, obviously this is an example of _______________.

As with any other type of physical evidence recovered at a crime scene, firearm evidence must be marked for identification and a chain of custody must be established.

What will be the basis of the firearms examiner in establishing the identity of the firearms?

Every barrel leaves its thumb mark on every bullet, which is fired through it, just as every breech-face leaves its thumb mark on the base of the fired cartridge case.

Striated action marks include the following, what is NOT?

It refers to the distance advance by riflings in one complete run.

Every barrel will not leave its mark known as a “thumb mark or fingerprint” on every bullet that passes through it.

This is the depressed portions canal-like structure inside the barrel.

Which of the following should be avoided in marking firearms evidence?

The protection of class and individual markings on bullets and cartridge cases must be the primary concern of the field investigator who is handling such evidence.

These are indications peculiar to one weapon, which can be seen on the cartridge case and or on the bullet fired from it:

Which of the following terms do NOT fall under the category of striated marks from where the word striated action marks come from?

A small instrument sometimes used in examining the internal surface of the gun barrel. It has a tiny lamp at the internal portion and this is inserted inside the bore for internal examinations.

Firing pin marks is an example of what marks?

Another term for incidental marks as used in forensic science is what?

When cartridge cases expand when fired pressing out against the walls of the chamber, what marks are produced?

What is a compression mark?