Georgiana Forensic Scienceballistics Quiz #1

2.

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

True
False

Correct Answer

A. True

Explanation

Rifled barrels are used in firearms to create a spin on the bullet, which improves accuracy. The rifling process leaves unique markings on the bullet as it passes through the barrel. These markings, known as striations, are influenced by various factors such as the manufacturing process, wear and tear, and individual characteristics of the barrel. Even barrels manufactured in succession will have slight variations in their rifling, resulting in different striation markings. Therefore, it is true that no two rifled barrels, even those manufactured in succession, will create identical striation markings.

Rate this question:

1

3.

Which of the following questions can ballistics NOT answer?

What type of firearm was used?
What was the caliber of the bullet?
What was the angle of impact?
All of these are questions that could be answered.

Correct Answer

A. All of these are questions that could be answered.

Explanation

The correct answer is that all of these questions could be answered by ballistics. Ballistics is the study of projectiles, including bullets, firearms, and their effects. It can determine the type of firearm used by analyzing the characteristics of the bullet, such as its size, shape, and markings. It can also determine the caliber of the bullet by measuring its diameter. Additionally, ballistics can calculate the angle of impact by examining the trajectory and the location of the bullet's entry and exit wounds. Therefore, all of these questions can be answered by ballistics.

Rate this question:

2

4.

This type of handgun has a revolving cylinder that turns as the gun is fired.

Semi-automatic
Fully-automatic
Revolver
Pistol

Correct Answer

A. Revolver

Explanation

A revolver is a type of handgun that has a revolving cylinder. This cylinder holds multiple rounds of ammunition, and it rotates as the gun is fired, aligning each round with the barrel for firing. This design allows for quick and easy reloading, as the shooter can simply rotate the cylinder to bring a fresh round into position. Unlike semi-automatic and fully-automatic handguns, which use a different mechanism to load and fire rounds, a revolver relies on the rotation of the cylinder to cycle through its ammunition. Therefore, the correct answer is revolver.

Rate this question:

2

5.

This type of long gun fires bullets.

Rifle
Pistol
Shotgun
Revolver

Correct Answer

A. Rifle

Explanation

A rifle is a type of long gun that fires bullets. It is designed with a long barrel and is typically fired from the shoulder. Rifles are known for their accuracy and range, making them suitable for long-distance shooting. They are commonly used in hunting, sport shooting, and military applications. Unlike shotguns or pistols, rifles have a rifled barrel, which imparts spin to the bullet, improving its stability and accuracy in flight. Therefore, the correct answer is rifle.

Rate this question:

1

6.

The inner surface of the barrel leaves its striation markings on any bullet passing through it. What type of characteristics are striations?

Class characteristics
Individual characteristics

Correct Answer

A. Individual characteristics

Explanation

Striations are individual characteristics. These are unique and specific marks left on a bullet's surface by the inner surface of the barrel. Each firearm has its own set of striation markings, which are caused by imperfections, wear, and unique tooling marks in the barrel. These marks are distinct and can be used to match a bullet to a specific firearm, making them individual characteristics rather than class characteristics that could be shared among multiple bullets.

Rate this question:

1

7.

What type of long gun can fire either pellets or slugs?

Rifle
Shotgun
Revolver
Pistol

Correct Answer

A. Shotgun

Explanation

A shotgun is a type of long gun that can fire either pellets or slugs. Shotguns are versatile firearms that are commonly used for hunting, sport shooting, and self-defense. The ability to shoot both pellets and slugs makes shotguns suitable for a wide range of purposes. Pellets are small round projectiles that disperse upon firing, making shotguns effective for shooting multiple targets at close range. Slugs, on the other hand, are single large projectiles that provide greater accuracy and range, making shotguns suitable for longer distance shooting.

Rate this question:

1

8.

The grooves cause the fired bullet to spin, improving its ________________.

Correct Answer
Accuracy
accuracy

Explanation
The grooves on a fired bullet cause it to spin, which improves its accuracy. When a bullet spins, it stabilizes its flight path, reducing any wobbling or tumbling that may occur. This rotation helps the bullet maintain a straight trajectory, making it more likely to hit the intended target accurately. Therefore, the grooves play a crucial role in enhancing the bullet's accuracy.

Rate this question:

1

9.

The single most important tool for a firearm examiner is:

Gun range
Computerized Imaging
Trajectory
Microscopes

Correct Answer

A. Microscopes

Explanation

Microscopes are the most important tool for a firearm examiner because they allow for detailed examination and analysis of bullet casings, gun barrels, and other microscopic evidence. They enable examiners to identify unique markings on bullets and cartridge cases, which can help in linking a specific firearm to a crime. Microscopes also allow for the comparison of toolmarks on bullets and casings, aiding in the determination of whether they were fired from the same gun. Overall, microscopes play a crucial role in the forensic analysis of firearms and are essential for accurate and reliable results.

Rate this question:

1

10.

The ______ maintains a database of bullets and cartridge casings reviewed from crime scenes or test fires from retrieved firearms.

NCIS
NBIN
NIBIN
BAN

Correct Answer

A. NIBIN

Explanation

NIBIN stands for National Integrated Ballistic Information Network. It is a database that stores information about bullets and cartridge casings collected from crime scenes or test fires from firearms. NIBIN helps law enforcement agencies to link different crime scenes or shootings together based on the unique characteristics of the bullets or casings found. This enables investigators to identify potential connections between different cases and helps in solving crimes.

Rate this question:

1

11.

This stops a spent case from recoiling towards the user and makes the bottom of the case.

Extractor
Ejector
Breechblock
Safety

Correct Answer

A. Breechblock

Explanation

The correct answer is Breechblock. The breechblock is a component of a firearm that closes the rear of the barrel and contains the firing mechanism. It is designed to prevent the spent case from recoiling towards the user by securely holding it in place. The breechblock also helps in sealing the chamber during firing and ensures that the pressure generated by the propellant gases is directed forward, propelling the bullet out of the barrel.

Rate this question:

1

12.

This part of the gun brings a cartridge into firing chamber and can leave scratches on the cartridge casing.

Extractor
Ejector
Breechblock
Safety

Correct Answer

A. Extractor

Explanation

The extractor is responsible for bringing a cartridge into the firing chamber of a gun. As it grips the rim of the cartridge, it may cause scratches on the casing. This is because the extractor exerts force on the cartridge during the loading process, which can result in minor abrasions or marks on the casing.

Rate this question:

1

13.

What pushes the bullet from the casing into the barrel of a firearm? This should be one complete sentence.

14.

Scenario: Dr. Mims has arrived at the crime scene of a homicide. Bullets are found near the dead body recovered at the scene. Dr. Mims analyzes the cartridges using computerized technology. Once he receives his results, he sends them over to the FBI for further analysis. Is. Dr. Mims' job complete? Why or why not?

Georgiana Forensic Scienceballistics Quiz #1

________________ is the study of bullets and firearms.

Quiz Preview

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

Which of the following questions can ballistics NOT answer?

This type of handgun has a revolving cylinder that turns as the gun is fired.

This type of long gun fires bullets.

The inner surface of the barrel leaves its striation markings on any bullet passing through it. What type of characteristics are striations?

What type of long gun can fire either pellets or slugs?

The grooves cause the fired bullet to spin, improving its ________________.

The single most important tool for a firearm examiner is:

The ______ maintains a database of bullets and cartridge casings reviewed from crime scenes or test fires from retrieved firearms.

This stops a spent case from recoiling towards the user and makes the bottom of the case.

This part of the gun brings a cartridge into firing chamber and can leave scratches on the cartridge casing.

What pushes the bullet from the casing into the barrel of a firearm? This should be one complete sentence.