Page | 1
OPA SFST STUDY GUIDE 2026
LATEST QUESTIONS AND
ANSWERS| ACE YOUR GRADES.
How many clues do you need for OLS for a good case? - correct
answer -2+ clues
What are the stages for OLS? - correct answer -Instruction stage,
balance and counting stage
If you notice resting nystagmus or unequal pupils, what should
you do? - correct answer -Contact EMS for a possible head injury
Things to observe when interviewing a potentially drunk subject
operating a motor vehicle - correct answer -Bloodshot eyes,
soiled clothing, fumbling fingers, alcohol containers,
drugs/paraphernalia, bruises, bumps, scratches, unusual actions,
slurred speech, admission of drinking, inconsistent responses,
unusual statements, abusive language, smells of alcoholic
beverage, marijuana, coverup odors
, Page | 2
Before administering HGN, what should you ask the subject
about? - correct answer -Whether they wear contacts or glasses,
and if they wear contacts, whether they're colored, soft, or hard
contacts
Before administering SFST's, what should you do? - correct
answer -Ask the subject medical questions
When administering HGN, how should you have the subject
faced? - correct answer -Away from your patrol car lights
Is a preliminary breath test (PBT) admissible in court? - correct
answer -No
When administering HGN/VGN, how far away should the stimulus
be away from the person's face? - correct answer -12-15 inches
away, and slightly above eye level
Can the same clue be used against a subject numerous times? -
correct answer -No
OPA SFST STUDY GUIDE 2026
LATEST QUESTIONS AND
ANSWERS| ACE YOUR GRADES.
How many clues do you need for OLS for a good case? - correct
answer -2+ clues
What are the stages for OLS? - correct answer -Instruction stage,
balance and counting stage
If you notice resting nystagmus or unequal pupils, what should
you do? - correct answer -Contact EMS for a possible head injury
Things to observe when interviewing a potentially drunk subject
operating a motor vehicle - correct answer -Bloodshot eyes,
soiled clothing, fumbling fingers, alcohol containers,
drugs/paraphernalia, bruises, bumps, scratches, unusual actions,
slurred speech, admission of drinking, inconsistent responses,
unusual statements, abusive language, smells of alcoholic
beverage, marijuana, coverup odors
, Page | 2
Before administering HGN, what should you ask the subject
about? - correct answer -Whether they wear contacts or glasses,
and if they wear contacts, whether they're colored, soft, or hard
contacts
Before administering SFST's, what should you do? - correct
answer -Ask the subject medical questions
When administering HGN, how should you have the subject
faced? - correct answer -Away from your patrol car lights
Is a preliminary breath test (PBT) admissible in court? - correct
answer -No
When administering HGN/VGN, how far away should the stimulus
be away from the person's face? - correct answer -12-15 inches
away, and slightly above eye level
Can the same clue be used against a subject numerous times? -
correct answer -No
