The spiral pattern cut into the bore consists of raised areas called __________ and depressions called __________.
1 point
1
Question 2
2.
Drag and drop the terms onto the image to label the schematic of a bullet.
Other Answer Choices:
primer
propellant
extracting groove
copper jacket
lead core
brass cartridge case
1 point
1
Question 3
3.
Explain why GSR cannot be used to connect a suspect to a weapon used in commission of a crime.
1 point
1
Question 4
4.
A firearm is discharged 500 feet away from a target (as shown in the figure below). The bullet travels at a speed of 750 ft/sec when ejected from the barrel.
How long does the bullet take to reach the target?
_______ (round to 2 decimal places)
How far does the bullet fall while it is airborne?
_______ (round to 2 decimal places)
1 point
1
Question 5
5.
Calculate the entry angle of the bullet that made this hole (see show your work)!
_______ (round to 2 decimal places)
1 point
1
Question 6
6.
Examine the following bullet and note its dimensions:
- 6 lands/grooves
- cut rifling
- groove width = 0.037 - 0.041 inches
- land width = 0.188 - 0.190 inches
Check the "show your work" section and select all of the possible firearm manufacturers from the list below:
1 point
1
Question 7
7.
Count how many lands/grooves are shown on each barrel cross-section!
Other Answer Choices:
8
1
6
4
3
7
5
9
2
1 point
1
Question 8
8.
Calculate the height above the car!
_______ (round to nearest whole number)
1 point
1
Question 9
9.
Categorize the following breechface impression!
1 point
1
Question 10
10.
Categorize the bullets as left twist or right twist.
LEFT
RIGHT
1 point
1
Question 11
11.
Label the cartridge casings as centerfire or rimfire.
