FIS 409 Questions with Correct Answers Latest Version 2025 Graded A+
What is a scallop? - Answers An edge characteristic that appears like a series of curves around the edge
of the stain.
T/F? If prevention fails to prevent an accidental exposure to a bloodborne pathogen, the CDC
recommends that the person seek treatment within 3 days from the exposure. - Answers False
Which of the following is/are TRUE about bloodborne pathogens?
a. HBV is the most severe form of hepatitis
b. In a liquid state, the HIV virus can survive outsie the human body for us to 5 days.
c. Scraping dried bloodstains for collection lessons the risk of airborne particles
d.A and C
e.B and C
f. none of the above - Answers f. none of the above.
What term defines a process that involves blood being deposited inside the barrel of a weapon after
discharge? - Answers blowback or drawback effect
What of the following is/are TRUE about wipes and swipes based on OSAC terminology?
a. Swipes indicate the relative motion based on characteristics
b. Wipes are a type of altered stain
c. A victim is bleeding from the head and their head gets pressed against and dragged down a wall
leaving a transfer. This is known as a wipe
d. Both A and B
e. Both B and C
f. All of the above - Answers d. Both A and B
Assuming that a substance at the scene is blood, what is the next question in the B&G classification
system? - Answers Are the stains circular or elliptical?
BPA is based on a simple theory, which states that blood as a ________will react to ________ in a
predictable fashion. - Answers Fluid, External Forces
What are the linear characteristics within the center of a swipe called? - Answers Striations
, In the legacy system, stains resulting from blunt force trauma (between 1-4 mm) were referred to as
_______________ spatter/stains - Answers Medium Velocity
What is a complex pattern? - Answers A pattern that includes characteristics of several/multiple
categories.
This person established three basic groups of bloodstains, based on their mechanisms of creation, that
was published in the IABPA library. These included bloodstains from
1) extravasations,
2) various instruments
3) wiping or removal of blood - Answers Dr. Josef Radziki (last name is most important here)
You visualize a bloodstain that was disturbed but has an outline of its periphery. This is known as a
perimeter stain (OSAC) but may be referred to as ________________. - Answers skeletonized stain or
skeletonization
Why does B&G not include altered stains in their classification system? - Answers Do not define a
singularly distinctive stain or pattern Or Can occur across multiple stain/pattern types
What term describes the pattern created by one liquid dripping into another liquid (one of the liquids
must be blood)? - Answers Drip Pattern
When finding the gamma angle, from which end of the bloodstain do you follow? - Answers The
direction of travel/the tail.
Which of the following is/are TRUE regarding oscillation of blood droplets in flight?
a. Longer in-flight time decreases the amount of oscillation
b. Surface tension acts to maintain a spherical shape
c. Larger volume droplets cease oscillation before smaller volume droplets
d. Both A and B
e. Both B and C
f. All of the above - Answers d. Both A and B
T/F? As you drop blood from increasing heights (assume everything else is constant), the diameter of the
resulting stain will increase. - Answers False
Which of the following is/are TRUE regarding liquid-to-liquid impacts?
What is a scallop? - Answers An edge characteristic that appears like a series of curves around the edge
of the stain.
T/F? If prevention fails to prevent an accidental exposure to a bloodborne pathogen, the CDC
recommends that the person seek treatment within 3 days from the exposure. - Answers False
Which of the following is/are TRUE about bloodborne pathogens?
a. HBV is the most severe form of hepatitis
b. In a liquid state, the HIV virus can survive outsie the human body for us to 5 days.
c. Scraping dried bloodstains for collection lessons the risk of airborne particles
d.A and C
e.B and C
f. none of the above - Answers f. none of the above.
What term defines a process that involves blood being deposited inside the barrel of a weapon after
discharge? - Answers blowback or drawback effect
What of the following is/are TRUE about wipes and swipes based on OSAC terminology?
a. Swipes indicate the relative motion based on characteristics
b. Wipes are a type of altered stain
c. A victim is bleeding from the head and their head gets pressed against and dragged down a wall
leaving a transfer. This is known as a wipe
d. Both A and B
e. Both B and C
f. All of the above - Answers d. Both A and B
Assuming that a substance at the scene is blood, what is the next question in the B&G classification
system? - Answers Are the stains circular or elliptical?
BPA is based on a simple theory, which states that blood as a ________will react to ________ in a
predictable fashion. - Answers Fluid, External Forces
What are the linear characteristics within the center of a swipe called? - Answers Striations
, In the legacy system, stains resulting from blunt force trauma (between 1-4 mm) were referred to as
_______________ spatter/stains - Answers Medium Velocity
What is a complex pattern? - Answers A pattern that includes characteristics of several/multiple
categories.
This person established three basic groups of bloodstains, based on their mechanisms of creation, that
was published in the IABPA library. These included bloodstains from
1) extravasations,
2) various instruments
3) wiping or removal of blood - Answers Dr. Josef Radziki (last name is most important here)
You visualize a bloodstain that was disturbed but has an outline of its periphery. This is known as a
perimeter stain (OSAC) but may be referred to as ________________. - Answers skeletonized stain or
skeletonization
Why does B&G not include altered stains in their classification system? - Answers Do not define a
singularly distinctive stain or pattern Or Can occur across multiple stain/pattern types
What term describes the pattern created by one liquid dripping into another liquid (one of the liquids
must be blood)? - Answers Drip Pattern
When finding the gamma angle, from which end of the bloodstain do you follow? - Answers The
direction of travel/the tail.
Which of the following is/are TRUE regarding oscillation of blood droplets in flight?
a. Longer in-flight time decreases the amount of oscillation
b. Surface tension acts to maintain a spherical shape
c. Larger volume droplets cease oscillation before smaller volume droplets
d. Both A and B
e. Both B and C
f. All of the above - Answers d. Both A and B
T/F? As you drop blood from increasing heights (assume everything else is constant), the diameter of the
resulting stain will increase. - Answers False
Which of the following is/are TRUE regarding liquid-to-liquid impacts?
