SFST EXAM AND PRACTICE EXAM NEWEST 2026/
2027 TEST BANK / STANDARDIZED FIELD SOBRIETY
TESTING (SFST) EXAM PREP WITH COMPLETE 300
REAL EXAM QUESTIONS AND CORRECT VERIFIED
ANSWERS/ ALREADY GRADED A+ (MOST RECENT!!)
During an HGN examination, an officer observes that the subject’s eyes
begin jerking before reaching a 45-degree angle. Which clue is
indicated?
A. Lack of smooth pursuit
B. Vertical nystagmus
C. Onset before 45 degrees
D. Equal pupil size - Correct answer - C
The clue is onset of nystagmus prior to 45 degrees. The officer must
follow standardized stimulus positioning and timing procedures.
A subject begins the Walk-and-Turn test before the officer finishes
explaining the instructions. What is the primary concern?
A. The test is automatically invalid
B. Instructions may not have been understood
C. The subject has failed the test
D. The subject is necessarily impaired - Correct answer - B
The officer must ensure that instructions are understood and
administered according to the standardized procedure before interpreting
performance.
pg. 1
,While administering the One-Leg Stand, an officer observes the subject
putting the raised foot down several times. How is this behavior
classified?
A. Sways while balancing
B. Uses arms for balance
C. Hops
D. Puts foot down - Correct answer - D
Putting the raised foot down is one of the four standardized clues for the
One-Leg Stand.
An officer moves the HGN stimulus too quickly across the subject’s
field of vision. Why is this a problem?
A. It departs from standardized administration
B. It proves the subject is sober
C. It eliminates all observable clues
D. It confirms a medical condition - Correct answer - A
HGN testing requires standardized stimulus speed and positioning.
Deviations may compromise the reliability and defensibility of
observations.
A subject completes the Walk-and-Turn test but steps off the line twice.
Which clue does this demonstrate?
A. Improper turn
B. Steps off the line
C. Incorrect number of steps
D. Starts too soon - Correct answer - B
pg. 2
,Stepping off the line is a standardized Walk-and-Turn clue. The officer
should document the actual behavior rather than draw conclusions from
a single observation.
A subject raises both arms substantially while attempting to maintain the
One-Leg Stand position. Which standardized clue is present?
A. Uses arms for balance
B. Incorrect counting
C. Steps off the line
D. Improper turn - Correct answer - A
Using the arms for balance is a standardized One-Leg Stand clue when
the movement meets the training criteria.
Before beginning SFSTs, an officer notices that the roadside surface is
uneven and covered with loose gravel. What is the principal concern?
A. The surface guarantees a failed test
B. The subject must perform faster
C. The officer should ignore the surface
D. The environment may affect performance - Correct answer - D
Uneven or unstable surfaces can affect balance and coordination. The
officer should consider safety, document relevant conditions, and follow
training procedures.
During the Walk-and-Turn test, a subject turns by pivoting on one foot
rather than using the prescribed series of small steps. Which clue is
indicated?
A. Starts too soon
pg. 3
, B. Improper turn
C. Misses heel-to-toe
D. Uses arms for balance - Correct answer - B
An improper turn is a standardized clue when the subject fails to follow
the prescribed turning method.
An officer observes four distinct HGN clues across the two eyes. What
is the total possible number of standardized HGN clues?
A. Four
B. Five
C. Six
D. Eight - Correct answer - C
The standardized HGN assessment evaluates three clues in each eye, for
six possible clues total.
A subject reports a recent ankle injury before the One-Leg Stand test.
Which response is most appropriate?
A. Consider the injury and document it
B. Treat the injury as proof of intoxication
C. Ignore the disclosure
D. Require the subject to continue regardless - Correct answer - A
An ankle injury may affect balance and test performance. The officer
should consider safety and the injury’s potential effect when selecting
and interpreting tests.
pg. 4
2027 TEST BANK / STANDARDIZED FIELD SOBRIETY
TESTING (SFST) EXAM PREP WITH COMPLETE 300
REAL EXAM QUESTIONS AND CORRECT VERIFIED
ANSWERS/ ALREADY GRADED A+ (MOST RECENT!!)
During an HGN examination, an officer observes that the subject’s eyes
begin jerking before reaching a 45-degree angle. Which clue is
indicated?
A. Lack of smooth pursuit
B. Vertical nystagmus
C. Onset before 45 degrees
D. Equal pupil size - Correct answer - C
The clue is onset of nystagmus prior to 45 degrees. The officer must
follow standardized stimulus positioning and timing procedures.
A subject begins the Walk-and-Turn test before the officer finishes
explaining the instructions. What is the primary concern?
A. The test is automatically invalid
B. Instructions may not have been understood
C. The subject has failed the test
D. The subject is necessarily impaired - Correct answer - B
The officer must ensure that instructions are understood and
administered according to the standardized procedure before interpreting
performance.
pg. 1
,While administering the One-Leg Stand, an officer observes the subject
putting the raised foot down several times. How is this behavior
classified?
A. Sways while balancing
B. Uses arms for balance
C. Hops
D. Puts foot down - Correct answer - D
Putting the raised foot down is one of the four standardized clues for the
One-Leg Stand.
An officer moves the HGN stimulus too quickly across the subject’s
field of vision. Why is this a problem?
A. It departs from standardized administration
B. It proves the subject is sober
C. It eliminates all observable clues
D. It confirms a medical condition - Correct answer - A
HGN testing requires standardized stimulus speed and positioning.
Deviations may compromise the reliability and defensibility of
observations.
A subject completes the Walk-and-Turn test but steps off the line twice.
Which clue does this demonstrate?
A. Improper turn
B. Steps off the line
C. Incorrect number of steps
D. Starts too soon - Correct answer - B
pg. 2
,Stepping off the line is a standardized Walk-and-Turn clue. The officer
should document the actual behavior rather than draw conclusions from
a single observation.
A subject raises both arms substantially while attempting to maintain the
One-Leg Stand position. Which standardized clue is present?
A. Uses arms for balance
B. Incorrect counting
C. Steps off the line
D. Improper turn - Correct answer - A
Using the arms for balance is a standardized One-Leg Stand clue when
the movement meets the training criteria.
Before beginning SFSTs, an officer notices that the roadside surface is
uneven and covered with loose gravel. What is the principal concern?
A. The surface guarantees a failed test
B. The subject must perform faster
C. The officer should ignore the surface
D. The environment may affect performance - Correct answer - D
Uneven or unstable surfaces can affect balance and coordination. The
officer should consider safety, document relevant conditions, and follow
training procedures.
During the Walk-and-Turn test, a subject turns by pivoting on one foot
rather than using the prescribed series of small steps. Which clue is
indicated?
A. Starts too soon
pg. 3
, B. Improper turn
C. Misses heel-to-toe
D. Uses arms for balance - Correct answer - B
An improper turn is a standardized clue when the subject fails to follow
the prescribed turning method.
An officer observes four distinct HGN clues across the two eyes. What
is the total possible number of standardized HGN clues?
A. Four
B. Five
C. Six
D. Eight - Correct answer - C
The standardized HGN assessment evaluates three clues in each eye, for
six possible clues total.
A subject reports a recent ankle injury before the One-Leg Stand test.
Which response is most appropriate?
A. Consider the injury and document it
B. Treat the injury as proof of intoxication
C. Ignore the disclosure
D. Require the subject to continue regardless - Correct answer - A
An ankle injury may affect balance and test performance. The officer
should consider safety and the injury’s potential effect when selecting
and interpreting tests.
pg. 4
