DRE Final Knowledge Exam Practice Test Bank | Drug
Recognition Expert Certification Actual Questions &
Technical Rationales
Dominate your international certification board with this massive, high-yield DRE Final
Knowledge Exam practice test bank featuring comprehensive questions and answers.
Master all critical 12-step Drug Recognition Expert evaluation protocols, including
nystagmus examinations (HGN/VGN), clinical vital signs matrices, darkroom pupil
evaluations, and the seven major drug category impairment symptomatologies.
Every verified question is paired with a highly thorough forensic and legal rationale to
sharpen your field detection precision, simplify your toxicology reviews, and guarantee a
passing score on your final certification.
EXAM OVERVIEW
The Drug Recognition Expert (DRE) Final Knowledge Exam is administered by the
International Association of Chiefs of Police (IACP) for law enforcement officers seeking
DRE certification. The exam tests knowledge of the 12-step drug influence evaluation
process, the seven drug categories, physiological indicators of impairment, and related
legal/physiological concepts. A passing score is required to achieve certification.
1. During the eye examination, the DRE checks for Horizontal Gaze Nystagmus
(HGN). At what angle should the stimulus be positioned to check for "onset prior
to 45 degrees"?
A. 15 degrees
B. 30 degrees
C. 45 degrees
D. 60 degrees
Rationale: The DRE checks for HGN by moving the stimulus to approximately 30 degrees
(onset prior to 45 degrees) and then to maximum deviation. Onset before 45 degrees is a
validated clue for HGN.
,2. How many validated clues are checked in each eye during the HGN
examination?
A. 2
B. *3*
C. 4
D. 5
Rationale: There are three validated clues checked in each eye: (1) Lack of smooth pursuit,
(2) Distinct and sustained nystagmus at maximum deviation, and (3) Onset of nystagmus
prior to 45 degrees. This gives a maximum of 6 clues total.
3. What is the maximum number of HGN clues that can be observed in a subject?
A. 4
B. *6*
C. 8
D. 10
Rationale: With three clues checked in each eye, the maximum number of HGN clues is
six.
4. During the Walk and Turn test, how many validated clues are possible?
A. 4
B. 6
C. *8*
D. 10
Rationale: There are eight validated clues for the Walk and Turn test: (1) Cannot keep
balance during instructions, (2) Starts too soon, (3) Stops while walking, (4) Misses heel-to-
toe, (5) Steps off line, (6) Uses arms for balance, (7) Improper turn, and (8) Incorrect
number of steps.
5. During the One Leg Stand test, how many validated clues are possible?
A. 2
B. *4*
,C. 6
D. 8
Rationale: There are four validated clues for the One Leg Stand test: (1) Sways while
balancing, (2) Uses arms for balance, (3) Hops, and (4) Puts foot down.
6. During the Modified Romberg Balance test, how long is the subject asked to
estimate?
A. 15 seconds
B. 30 seconds
C. 45 seconds
D. 60 seconds
Rationale: During the Modified Romberg Balance test, the subject is asked to estimate the
passage of 30 seconds.
7. What is the first step in the DRE evaluation process?
A. Interview of the arresting officer
B. Breath alcohol test
C. Preliminary examination and first pulse
D. Eye examination
Rationale: The first step is the breath alcohol test, completed by the arresting officer before
the DRE begins their evaluation.
8. Which step of the DRE evaluation involves the Modified Romberg Balance, Walk
and Turn, and One Leg Stand tests?
A. Step 3
B. Step 4
C. Step 5
D. Step 6
Rationale: Step 5 includes the Divided Attention Tests: Modified Romberg Balance, Walk
and Turn, and One Leg Stand.
9. How many times does the DRE check the subject's pulse during the evaluation?
A. Once
B. Twice
, C. Three times
D. Four times
Rationale: The DRE checks the pulse three times: during the preliminary examination (Step
3), during the divided attention tests (Step 5), and during the check for injection sites (Step
9).
10. The secondary pulse (pulse #2) is taken in conjunction with which other
examination?
A. First pulse
B. Psychophysical tests
C. Dark room examination
D. Muscle tone assessment
Rationale: The secondary pulse (pulse #2) is taken in conjunction with the psychophysical
tests (divided attention tests) in Step 5.
11. What is the primary purpose of the dark room examination?
A. To check for eye injuries
B. To assess pupil size and reaction to light
C. To check for vision problems
D. To measure blood pressure
Rationale: The dark room examination assesses pupil size and reaction to light under
controlled lighting conditions.
12. How long should the DRE wait in the dark room before beginning to check the
suspect's pupils?
A. 1 minute
B. 2 minutes
C. 3 minutes
D. 5 minutes
Rationale: The DRE should wait approximately 3 minutes in the dark room before checking
pupils to allow them to adapt to near total darkness.
13. Which of the following is NOT a validated clue for the Walk and Turn test?
A. Cannot keep balance during instructions
B. Starts too soon
Recognition Expert Certification Actual Questions &
Technical Rationales
Dominate your international certification board with this massive, high-yield DRE Final
Knowledge Exam practice test bank featuring comprehensive questions and answers.
Master all critical 12-step Drug Recognition Expert evaluation protocols, including
nystagmus examinations (HGN/VGN), clinical vital signs matrices, darkroom pupil
evaluations, and the seven major drug category impairment symptomatologies.
Every verified question is paired with a highly thorough forensic and legal rationale to
sharpen your field detection precision, simplify your toxicology reviews, and guarantee a
passing score on your final certification.
EXAM OVERVIEW
The Drug Recognition Expert (DRE) Final Knowledge Exam is administered by the
International Association of Chiefs of Police (IACP) for law enforcement officers seeking
DRE certification. The exam tests knowledge of the 12-step drug influence evaluation
process, the seven drug categories, physiological indicators of impairment, and related
legal/physiological concepts. A passing score is required to achieve certification.
1. During the eye examination, the DRE checks for Horizontal Gaze Nystagmus
(HGN). At what angle should the stimulus be positioned to check for "onset prior
to 45 degrees"?
A. 15 degrees
B. 30 degrees
C. 45 degrees
D. 60 degrees
Rationale: The DRE checks for HGN by moving the stimulus to approximately 30 degrees
(onset prior to 45 degrees) and then to maximum deviation. Onset before 45 degrees is a
validated clue for HGN.
,2. How many validated clues are checked in each eye during the HGN
examination?
A. 2
B. *3*
C. 4
D. 5
Rationale: There are three validated clues checked in each eye: (1) Lack of smooth pursuit,
(2) Distinct and sustained nystagmus at maximum deviation, and (3) Onset of nystagmus
prior to 45 degrees. This gives a maximum of 6 clues total.
3. What is the maximum number of HGN clues that can be observed in a subject?
A. 4
B. *6*
C. 8
D. 10
Rationale: With three clues checked in each eye, the maximum number of HGN clues is
six.
4. During the Walk and Turn test, how many validated clues are possible?
A. 4
B. 6
C. *8*
D. 10
Rationale: There are eight validated clues for the Walk and Turn test: (1) Cannot keep
balance during instructions, (2) Starts too soon, (3) Stops while walking, (4) Misses heel-to-
toe, (5) Steps off line, (6) Uses arms for balance, (7) Improper turn, and (8) Incorrect
number of steps.
5. During the One Leg Stand test, how many validated clues are possible?
A. 2
B. *4*
,C. 6
D. 8
Rationale: There are four validated clues for the One Leg Stand test: (1) Sways while
balancing, (2) Uses arms for balance, (3) Hops, and (4) Puts foot down.
6. During the Modified Romberg Balance test, how long is the subject asked to
estimate?
A. 15 seconds
B. 30 seconds
C. 45 seconds
D. 60 seconds
Rationale: During the Modified Romberg Balance test, the subject is asked to estimate the
passage of 30 seconds.
7. What is the first step in the DRE evaluation process?
A. Interview of the arresting officer
B. Breath alcohol test
C. Preliminary examination and first pulse
D. Eye examination
Rationale: The first step is the breath alcohol test, completed by the arresting officer before
the DRE begins their evaluation.
8. Which step of the DRE evaluation involves the Modified Romberg Balance, Walk
and Turn, and One Leg Stand tests?
A. Step 3
B. Step 4
C. Step 5
D. Step 6
Rationale: Step 5 includes the Divided Attention Tests: Modified Romberg Balance, Walk
and Turn, and One Leg Stand.
9. How many times does the DRE check the subject's pulse during the evaluation?
A. Once
B. Twice
, C. Three times
D. Four times
Rationale: The DRE checks the pulse three times: during the preliminary examination (Step
3), during the divided attention tests (Step 5), and during the check for injection sites (Step
9).
10. The secondary pulse (pulse #2) is taken in conjunction with which other
examination?
A. First pulse
B. Psychophysical tests
C. Dark room examination
D. Muscle tone assessment
Rationale: The secondary pulse (pulse #2) is taken in conjunction with the psychophysical
tests (divided attention tests) in Step 5.
11. What is the primary purpose of the dark room examination?
A. To check for eye injuries
B. To assess pupil size and reaction to light
C. To check for vision problems
D. To measure blood pressure
Rationale: The dark room examination assesses pupil size and reaction to light under
controlled lighting conditions.
12. How long should the DRE wait in the dark room before beginning to check the
suspect's pupils?
A. 1 minute
B. 2 minutes
C. 3 minutes
D. 5 minutes
Rationale: The DRE should wait approximately 3 minutes in the dark room before checking
pupils to allow them to adapt to near total darkness.
13. Which of the following is NOT a validated clue for the Walk and Turn test?
A. Cannot keep balance during instructions
B. Starts too soon
