Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

CHE104 > Ch. 8 Firearms > Flashcards

Ch. 8 Firearms Flashcards

1
Q

acid etching method

A

a method in which strong acid is applied to a firearm to reveal the serial number

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

black powder

A

the oldest gunpowder, which was composed of a mixture of potassium nitrate (saltpeter), charcoal, and sulfur

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

bore

A

the interior of a gun barrel

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

breechblock

A

the metal block at the back end of a gun barrel

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

broach cutter

A

a tool that is pushed through the gun barrel to form the rifling

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

caliber

A

the diameter of the bore of a firearm (other than a shotgun)

- usually expressed in hundredths of an inch (0.38 caliber) or in millimeters (9 mm)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

cartridge

A

ammunition enclosed in a cylindrical casing containing an explosive charge and a bullet, which is fired from a rifle or handgun

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

choke

A

a device placed on the end of a shotgun barrel to change the dispersion of pellets

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

ejector

A

the mechanism in a semiautomatic weapon that ejects the spend cartridge from the gun after firing

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

external ballistics

A

a description of the events that occur after the bullet leaves the barrel of the gun but before it strikes its target

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

extractor

A

the device that extracts the spend cartridge from the gun’s chamber

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

gauge

A

the unit used to designate size of a shotgun barrel
- the interior diameter of a shotgun barrel is determined by the number of lead balls that fit exactly in the barrel and are equivalent to 1 lb

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

grooves

A

the cutout section of a rifled barrel

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

internal ballistics

A

a description of the events that transpire within the firearm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

lands

A

the raised section of a rifled barrel

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Magnaflux method

A

a method of restoring a gun’s serial number

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

nitrocellulose

A

a cotton-like material produced when cellulose is treated with sulfuric acid and nitric acid

  • aka guncotton
  • used in the manufacture of explosives
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

nitroglycerin

A

an explosive chemical compound obtained by reacting glycerol with nitric acid
- used in the manufacture of gunpowder and dynamite

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

primer

A

an igniter that is used to initiate the burning of gunpowder

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

rifling

A

the spiral grooves on the inside surface of a gun barrel that make the bullet spin

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

semiautomatic pistol

A

a firearm that fires and reloads itself

22
Q

smokeless powder

A

an explosive charge composed of nitrocellulose or nitrocellulose and nitroglycerin (double-base powders)

23
Q

striations

A

fine scratches left on bullets

- formed from contract of the bullet with imperfections inside the gun barrel

24
Q

terminal ballistics

A

a description of what happens when the bullet strikes its target

25
Q

wad

A

a plastic, cardboard, or fiber disk that is placed between the powder and the shot in a shotgun shell

26
Q

The accuracy of a firearm can be greatly improved by making the barrel ________ (longer/shorter).

A

longer

27
Q

The spiral grooves in a gun barrel are referred to as ________.

A

rifling

28
Q

The rifling on the interior of a gun barrel has spiral grooves and ________.

A

lands

29
Q

The diameter of a gun barrel, as measured from a land on the left to one on the right, is known as the ________ of a weapon.

A

caliber

30
Q

A broach cutter is used to cut the _________ in the interior of the gun barrel.

A

grooves

31
Q

The lands and grooves in a gun barrel are ________ (class/individual) characteristics.

A

individual

32
Q

Besides grooves, the broach cutter produces fine lines called _________.

A

striations

33
Q

As bullets emerge from the gun barrel, they rotate, a phenomenon that is called _______.

A

precession

34
Q

The kinetic energy of a bullet ________ (increases/decreases) as the caliber of the weapon increases.

A

increases

35
Q

The diameter of a shotgun barrel is expressed as a(n) _________.

A

gauge

36
Q

The higher the shotgun gauge, the _______ (larger/smaller) the diameter of the barrel.

A

smaller

37
Q

A sawed-off shotgun is one that has a barrel length less than ________ inches.

A

18

38
Q

In the past, lead was used to make bullets because it has a high ________.

A

density

39
Q

Lead’s low ______ makes it soften at higher velocities.

A

melting point

40
Q

The element _________ is added to lead to raise its melting point.

A

antimony (Sb)

41
Q

The jacket of a cartridge is made from ________ or ________.

A

copper or brass

42
Q

Black powder is a mixture of _________, _________, and ________.

A

charcoal (C), sulfur (S), and potassium nitrate (KNO3)

43
Q

Smokeless powder is made from the chemicals ________ and ________.

A

cordite and ballistite

44
Q

Nitroglycerin is desensitized by adding _______, ________, or _______.

A

10%-30% ethanol, acetone, or dinitroluene

45
Q

The primer of a cartridge holds a(n) _________ explosive mixture.

A

stable but shock-sensitive

46
Q

The ________ was a crucial invention needed to make a gun that would fire in any weather.

A

primer

47
Q

Many firing ranges have banned ________ primers because of their potential health risks.

A

lead

48
Q

In a shotgun shell, the _________ is designed to make an almost gas-tight seal with the barrel.

A

wad

49
Q

The matching of fired bullets is carried out by using a(n) _________ microscope.

A

comparison

50
Q

IBIS is an acronym for _________.

A

Integrated Ballistics Identification System

51
Q

Serial numbers on handguns can be restored by two methods: the ________ method and the _______ method.

A

magnaflux; acid etching

CHE104 (15 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions