NHTSA – Ultimate Study Guide With Correct
Solutions
What does "NHTSA" stand for? Correct Answer - National
Highway Traffic Safety Administration
Define a "drug"? Correct Answer - Any substance when taken
into the body can impair one's ability to operate a motor vehicle
safely
What are the 5 eye examinations? Correct Answer - 1. Resting
nystagmus
2. Tracking ability
3. Pupil size
4. HGN
5. VGN
Define "Resting nystagmus"? Correct Answer - The involuntary
jerking of the eyes as the eyes look straight forward
Resting nystagmus usually indicates the presence of what? Correct
Answer - Usually indicates a pathological disorder or high dose
of PCP
If the two eyes do not track properly, it might indicate what?
Correct Answer - The possibility of a medical condition or injury
If the "Pupil size" of both eyes are drastically different, it usually
indicates what? Correct Answer - Usually indicates that the
subject is suffering from a head injury or a neurological disorder
, If "Pupils" are noticeably dilated, the possibility exists that the
subject could be impaired by what? Correct Answer -
Cannabis, CNS stimulant, or Hallucinogen
What are "Standardized Field Sobriety Tests"? Correct Answer -
A battery of scientifically validated tests to determine whether a
subject is impaired by alcohol
Define "Horizontal Gaze nystagmus"? Correct Answer - The
involuntary jerking as the eyes gaze to the side
What causes nystagmus? Correct Answer - Alcohol and certain
other drugs
What are the 6 clues of HGN? Correct Answer - 1. Lack of
smooth pursuit
2. Distinct and sustained nystagmus at maximum deviation
3. Onset of nystagmus prior to 45 degrees
How do you administer the HGN test? Correct Answer - 1.
Instruct the subject to stand with their feet together, arms at sides,
hold the head still, and follow the stimulus with their eyes only.
2. Hold stimulus 12 - 15 inches from subject's nose slightly above
eye level
3. Start with subject's left eye
4. Conduct two or more "passes" before each eye to look for the
clues of nystagmus
What did the Southern California Research Institute conclude about
the HGN test? Correct Answer - That just 4 of 6 clues on HGN is
88% accurate at detecting subjects at or above a.10 BAC
Name the 3 phases of DUI detection? Correct Answer - 1.
Vehicle in motion
Solutions
What does "NHTSA" stand for? Correct Answer - National
Highway Traffic Safety Administration
Define a "drug"? Correct Answer - Any substance when taken
into the body can impair one's ability to operate a motor vehicle
safely
What are the 5 eye examinations? Correct Answer - 1. Resting
nystagmus
2. Tracking ability
3. Pupil size
4. HGN
5. VGN
Define "Resting nystagmus"? Correct Answer - The involuntary
jerking of the eyes as the eyes look straight forward
Resting nystagmus usually indicates the presence of what? Correct
Answer - Usually indicates a pathological disorder or high dose
of PCP
If the two eyes do not track properly, it might indicate what?
Correct Answer - The possibility of a medical condition or injury
If the "Pupil size" of both eyes are drastically different, it usually
indicates what? Correct Answer - Usually indicates that the
subject is suffering from a head injury or a neurological disorder
, If "Pupils" are noticeably dilated, the possibility exists that the
subject could be impaired by what? Correct Answer -
Cannabis, CNS stimulant, or Hallucinogen
What are "Standardized Field Sobriety Tests"? Correct Answer -
A battery of scientifically validated tests to determine whether a
subject is impaired by alcohol
Define "Horizontal Gaze nystagmus"? Correct Answer - The
involuntary jerking as the eyes gaze to the side
What causes nystagmus? Correct Answer - Alcohol and certain
other drugs
What are the 6 clues of HGN? Correct Answer - 1. Lack of
smooth pursuit
2. Distinct and sustained nystagmus at maximum deviation
3. Onset of nystagmus prior to 45 degrees
How do you administer the HGN test? Correct Answer - 1.
Instruct the subject to stand with their feet together, arms at sides,
hold the head still, and follow the stimulus with their eyes only.
2. Hold stimulus 12 - 15 inches from subject's nose slightly above
eye level
3. Start with subject's left eye
4. Conduct two or more "passes" before each eye to look for the
clues of nystagmus
What did the Southern California Research Institute conclude about
the HGN test? Correct Answer - That just 4 of 6 clues on HGN is
88% accurate at detecting subjects at or above a.10 BAC
Name the 3 phases of DUI detection? Correct Answer - 1.
Vehicle in motion
