SFST TEST 2026/2027 ACTUAL EXAM
STUDY GUIDE COMPLETE QUESTIONS
AND CORRECT DETAILED ANSWERS WITH
RATIONALES (VERIFIED ANSWERS)
|ALREADY GRADED A+||NEWEST VERSION
During which phase are SFSTs administered? - ANSWER Pre-arrest screening
Name a vehicle cue of impairment. - ANSWER Weaving
Drifting is what type of clue? - ANSWER Vehicle in motion clue
Erratic braking indicates what? - ANSWER Possible impairment
Driving without headlights at night indicates what? - ANSWER Impairment
Failure to maintain lane indicates what? - ANSWER Impairment
Odor of alcohol indicates what? - ANSWER Alcohol consumption
Bloodshot, watery eyes indicate what? - ANSWER Possible impairment
,Slurred speech indicates what? - ANSWER Possible impairment
Fumbling with documents indicates what? - ANSWER Divided attention
impairment
Admission of drinking is what type of evidence? - ANSWER Direct evidence
Using vehicle for balance indicates what? - ANSWER Impairment
Swaying while standing indicates what? - ANSWER Impairment
In the San Diego SFST Field Validation study, the One Leg Stand test was found to
be - ANSWER 83%
Horizontal Gaze nystagmus is defined as - ANSWER the involuntary jerking of
the eyes, occurring as the eyes gaze to the side
Equal pupil size, resting nystagmus and ___ are three checks of the eyes done
prior to the administration of HGN to assess possible medical impairment -
ANSWER equal tracking
The second clue of the HGN test is - ANSWER Distinct and Sustained
Nystagmus at Maximum Deviation
,When checking for the onset of nystagmus prior to 45 degrees, the stimulus should
be moved at a speed from center in approximately ____ seconds to reach a 45
defree angle. - ANSWER a minimum of 4 secs
When checking for the Onset of Nystagmus Prior to 45 degrees, once you see the
jerking begin, you should immediately stop moving the stimulus and hold it steady
to - ANSWER verify that the jerking is continuing
The Walk and Turn test has two stages which are the - ANSWER instruction
and walking
How many clues have been validated for the Walk and Turn test - ANSWER 8
During the walk and turn test, for the turn, the subject is directed to leave his/her
____ food on the line and take a series of small steps around it and return back
down the line - ANSWER front or lead
Which of the following is NOT one of the validated clues for the One Leg Stand -
ANSWER Failure to count out loud
Illegal Per Se - ANSWER having statutory prohibited blood alcohol content,
operating a vehicle while having more than the legal percent of alcohol in blood or
breath
, DWI is committed by what type of group? - ANSWER A large portion of
society
What is general deterrence? - ANSWER Fear of arrest preventing behavior
What is specific deterrence? - ANSWER Punishment preventing repeat
behavior
What is the key factor in deterrence? - ANSWER Fear of being caught
What weakens deterrence? - ANSWER Failure to detect DWI
Alcohol is what type of drug? - ANSWER Central Nervous System depressant
Which alcohol is drinkable? - ANSWER Ethanol
Methanol is what type of alcohol? - ANSWER Toxic (wood alcohol)
What does fermentation require? - ANSWER Sugar and yeast
What does distillation do? - ANSWER Increases alcohol concentration
What is true about standard drinks? - ANSWER They contain equal alcohol
STUDY GUIDE COMPLETE QUESTIONS
AND CORRECT DETAILED ANSWERS WITH
RATIONALES (VERIFIED ANSWERS)
|ALREADY GRADED A+||NEWEST VERSION
During which phase are SFSTs administered? - ANSWER Pre-arrest screening
Name a vehicle cue of impairment. - ANSWER Weaving
Drifting is what type of clue? - ANSWER Vehicle in motion clue
Erratic braking indicates what? - ANSWER Possible impairment
Driving without headlights at night indicates what? - ANSWER Impairment
Failure to maintain lane indicates what? - ANSWER Impairment
Odor of alcohol indicates what? - ANSWER Alcohol consumption
Bloodshot, watery eyes indicate what? - ANSWER Possible impairment
,Slurred speech indicates what? - ANSWER Possible impairment
Fumbling with documents indicates what? - ANSWER Divided attention
impairment
Admission of drinking is what type of evidence? - ANSWER Direct evidence
Using vehicle for balance indicates what? - ANSWER Impairment
Swaying while standing indicates what? - ANSWER Impairment
In the San Diego SFST Field Validation study, the One Leg Stand test was found to
be - ANSWER 83%
Horizontal Gaze nystagmus is defined as - ANSWER the involuntary jerking of
the eyes, occurring as the eyes gaze to the side
Equal pupil size, resting nystagmus and ___ are three checks of the eyes done
prior to the administration of HGN to assess possible medical impairment -
ANSWER equal tracking
The second clue of the HGN test is - ANSWER Distinct and Sustained
Nystagmus at Maximum Deviation
,When checking for the onset of nystagmus prior to 45 degrees, the stimulus should
be moved at a speed from center in approximately ____ seconds to reach a 45
defree angle. - ANSWER a minimum of 4 secs
When checking for the Onset of Nystagmus Prior to 45 degrees, once you see the
jerking begin, you should immediately stop moving the stimulus and hold it steady
to - ANSWER verify that the jerking is continuing
The Walk and Turn test has two stages which are the - ANSWER instruction
and walking
How many clues have been validated for the Walk and Turn test - ANSWER 8
During the walk and turn test, for the turn, the subject is directed to leave his/her
____ food on the line and take a series of small steps around it and return back
down the line - ANSWER front or lead
Which of the following is NOT one of the validated clues for the One Leg Stand -
ANSWER Failure to count out loud
Illegal Per Se - ANSWER having statutory prohibited blood alcohol content,
operating a vehicle while having more than the legal percent of alcohol in blood or
breath
, DWI is committed by what type of group? - ANSWER A large portion of
society
What is general deterrence? - ANSWER Fear of arrest preventing behavior
What is specific deterrence? - ANSWER Punishment preventing repeat
behavior
What is the key factor in deterrence? - ANSWER Fear of being caught
What weakens deterrence? - ANSWER Failure to detect DWI
Alcohol is what type of drug? - ANSWER Central Nervous System depressant
Which alcohol is drinkable? - ANSWER Ethanol
Methanol is what type of alcohol? - ANSWER Toxic (wood alcohol)
What does fermentation require? - ANSWER Sugar and yeast
What does distillation do? - ANSWER Increases alcohol concentration
What is true about standard drinks? - ANSWER They contain equal alcohol
