IAI Certification Exam UPDATED ACTUAL Questions and CORRECT Answers
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IAI Certification
IAI Certification Exam UPDATED
ACTUAL Questions and CORRECT
Answers
1:1 magnification Ratio - CORRECT ANSWER- Item of evidence is life-size on sensor;
appropriate for photographing latent print.
Reciprocity Failure - CORRECT ANSWER- Tendency towards over/under exposing with
a long shutter...
IAI Certification Exam UPDATED
ACTUAL Questions and CORRECT
Answers
1:1 magnification Ratio - CORRECT ANSWER✔✔- Item of evidence is life-size on sensor;
appropriate for photographing latent print.
Reciprocity Failure - CORRECT ANSWER✔✔- Tendency towards over/under exposing with
a long shutter speed in a film, appears as dark noise.
Distance in "mm", optical center of a Lense and sensor when a camera is focused on infinity.
- CORRECT ANSWER✔✔- Focal Length
Diffraction (loss of...) - CORRECT ANSWER✔✔- Resolution, edge sharpness and clarity of
an image.
Light bends when the edge is struck.
Aberrations - CORRECT ANSWER✔✔- Image formed by a lens is blurred or distorted
generally at the widest aperture.
Focal Length - CORRECT ANSWER✔✔- Distance in "nm" optical center of a lens and
sensor when camera focused on infinity.
Telephoto Lens - CORRECT ANSWER✔✔- Compresses the distance between the
foreground and the background.
What is the "Shutter" - CORRECT ANSWER✔✔- Opening/ close to control the amount of
light striking the camera lens.
,SWGIT - CORRECT ANSWER✔✔- Scientific Working Group on Imaging Technology
SWGFAST - CORRECT ANSWER✔✔- Scientific Working Group on Friction Ridge
Analysis, Study and Technology
Overcast ( no shadows) Day - CORRECT ANSWER✔✔- F/8
ISO 100
1/125 SS
or
F/11
ISO 100
1/60 SS
is better due to DOF
What is "ISO" - CORRECT ANSWER✔✔- Sensors relative Sensitivity to light
ISO 100 - Sensitive to light
ISO 3200 - Requires less light.
Larger ISO - grainier and noise
4 Variables that directly affect Exposure - CORRECT ANSWER✔✔- Shutter Speed
Apertures
ISO
Ambient Lighting
Rule of Thirds - CORRECT ANSWER✔✔- DOF extends 1/3 in front of the point of exact
focus and 2/3 behind the point of exact focus
,Luminescence - CORRECT ANSWER✔✔- Ability of a molecule to emit light from a cause
other than heat. Phosphorescence and Fluorescence
RUVIS - CORRECT ANSWER✔✔- Reflected Ultraviolet Imaging System, uses short wave
ultraviolet light to visualize untreated fingerprints
Absorbed ultraviolet light - CORRECT ANSWER✔✔- Blood will absorb UV light, making it
contrast with surfaces similar in color to blood.
Visible light fluorescence - CORRECT ANSWER✔✔- Powders, chemicals, non-blood body
fluids, fibers and drug residue
Sync Speed - CORRECT ANSWER✔✔- Shutter speed at which cameras should be set when
an electronic flash is used
Each camera has one particular shutter speed that is designed as its sync speed
Avoid fast shutter speeds, shutter closes when flash is on
Image Stabilization - CORRECT ANSWER✔✔- Also known as vibration reduction lens
elements or sensors can move gyroscopically when movement is detected, allows use of
shutter speed 2 stops slower than normal
Hyperfocal Focus - CORRECT ANSWER✔✔- Infinity is in the background
maximizes DOF
What lens doesn't cause distortion - CORRECT ANSWER✔✔- 50 mm Lens
Photographing Fluorescent evidence - CORRECT ANSWER✔✔- Proper exposure is
frequently -2 ( two stops less)
, Photographing Fluorescence in visible light range - CORRECT ANSWER✔✔- F/11
ISO 100
aperture priority
Photogrammetry refers to: - CORRECT ANSWER✔✔- Photographing an object
measuring the image of the object on the processed photograph
reducing the measurements to some form such as a topographic map or scale crime scene
diagram
Proper Exposure Triangle - CORRECT ANSWER✔✔- F/Stop (Apature) ISO
\ flash/ambient light /
\/
Shutter Speed
F/Stop - CORRECT ANSWER✔✔- Refers to aperture, represents fraction of focal length of
lens over diameter of diaphragm.
*** like gauged wire big number = small and vice versa
Focal Length multiplier - CORRECT ANSWER✔✔- Corrects "cropped" field of view in
camera where sensor is smaller than the original film negatives for that size
Sunny Day Rule F/16 - CORRECT ANSWER✔✔- Sunny day with hard shadows selects
F/16 and shutter speed faster than your ISO
Beware of Diffraction- light bending when it strikes the edge, issue with small apature
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