DOT CERTIFICATION EXAM – NEWEST 2025/2026
COMPLETE REAL EXAM QUESTIONS WITH
CORRECT DETAILED ANSWERS AND RATIONALES
(VERIFIED) GRADED A+
SECTION 1: NEUROLOGICAL ASSESSMENT (Questions 1–50)
1. Which of the following is an assessment of L4 nerve root pathology?
A) Plantar flexion
B) Patellar reflex
C) Hip Extension
D) Big toe extension
Correct Answer: B
Rationale: The patellar reflex tests L4 nerve root. Plantar flexion tests S1-S2, hip
extension tests L5-S1, and big toe extension tests L5.
2. A 64-year-old male driver presents for his DOT exam. His signature is much less
legible than on his license, and he has lapses in concentration. What should the
examiner do next?
A) Obtain a non-DOT drug test
B) Perform cognitive testing
C) Refer to neurologist immediately
D) Issue a 1-year certificate
Correct Answer: B
Rationale: Changes in handwriting and concentration lapses warrant cognitive
screening (e.g., Mini-Cog) to rule out dementia or cognitive impairment before
certification.
3. A driver has a positive Romberg test. This indicates dysfunction in which
system?
A) Cerebellar
B) Proprioceptive/vestibular
1
,C) Cranial nerve III
D) Lower motor neuron
Correct Answer: B
Rationale: Romberg tests dorsal column (proprioception) and vestibular
pathways. A positive test (loss of balance with eyes closed) indicates sensory
ataxia.
4. Hyperactive deep tendon reflexes with clonus suggest:
A) Peripheral neuropathy
B) Upper motor neuron lesion
C) Lower motor neuron lesion
D) Myasthenia gravis
Correct Answer: B
Rationale: Hyperreflexia and clonus are hallmarks of upper motor neuron lesions
(e.g., stroke, spinal cord compression, multiple sclerosis).
5. A driver presents with acute unilateral facial droop, arm weakness, and slurred
speech. What is the appropriate action?
A) Issue a 3-month certificate
B) Send to emergency department immediately
C) Schedule MRI outpatient
D) Administer aspirin and observe
Correct Answer: B
Rationale: These are acute stroke symptoms requiring emergency evaluation.
Certification is contraindicated; the driver is not fit to operate a CMV.
6. Which cranial nerve is assessed by the gag reflex?
A) CN V and VII
B) CN IX and X
C) CN III and IV
D) CN XI and XII
Correct Answer: B
2
,Rationale: The gag reflex tests sensory CN IX (glossopharyngeal) and motor CN X
(vagus).
7. A driver reports a single seizure 8 months ago while off medication. Can he be
certified?
A) Yes, because it was a single seizure
B) No, because he has had a seizure within 12 months
C) Yes, if EEG is normal
D) Yes, with a 6-month certificate
Correct Answer: B
Rationale: FMCSA disqualifies drivers with a seizure within the past 12 months,
regardless of medication status. Exceptions require a waiver and 12-month
seizure-free interval off meds.
8. What is the minimum visual acuity for a commercial driver without a waiver?
A) 20/40 in each eye
B) 20/50 in the better eye
C) 20/70 in the better eye
D) 20/100 in the better eye
Correct Answer: A
Rationale: FMCSA requires 20/40 acuity in each eye (with or without correction)
for standard certification. Waivers allow 20/70 in the better eye.
9. A driver has nystagmus at rest. This is most consistent with:
A) Normal variant
B) Cerebellar or vestibular pathology
C) Peripheral nerve injury
D) Lumbar radiculopathy
Correct Answer: B
Rationale: Resting nystagmus indicates central (cerebellar/brainstem) or
vestibular pathology and requires further evaluation before certification.
10. The Babinski sign (extensor plantar response) in an adult indicates:
3
, A) Normal finding
B) Upper motor neuron lesion
C) Lower motor neuron lesion
D) Peripheral neuropathy
Correct Answer: B
Rationale: A positive Babinski (great toe extends, other toes fan) is abnormal in
adults and indicates an upper motor neuron lesion.
11. Dysdiadochokinesia (inability to perform rapid alternating movements)
indicates:
A) Cerebellar dysfunction
B) Basal ganglia dysfunction
C) Frontal lobe lesion
D) Spinal cord compression
Correct Answer: A
Rationale: Rapid alternating movements (e.g., pronation/supination) test
cerebellar function. Impairment suggests cerebellar disease.
12. A driver has a history of peripheral neuropathy. Which exam finding would be
most expected?
A) Hyperreflexia
B) Diminished ankle reflexes
C) Spasticity
D) Positive Babinski
Correct Answer: B
Rationale: Peripheral neuropathy affects lower motor neurons, causing
diminished or absent deep tendon reflexes (especially ankle jerk).
13. During the neurological exam, a driver has difficulty with heel-to-shin testing.
This suggests:
A) Sensory neuropathy
B) Cerebellar ataxia
C) Motor weakness only
4
COMPLETE REAL EXAM QUESTIONS WITH
CORRECT DETAILED ANSWERS AND RATIONALES
(VERIFIED) GRADED A+
SECTION 1: NEUROLOGICAL ASSESSMENT (Questions 1–50)
1. Which of the following is an assessment of L4 nerve root pathology?
A) Plantar flexion
B) Patellar reflex
C) Hip Extension
D) Big toe extension
Correct Answer: B
Rationale: The patellar reflex tests L4 nerve root. Plantar flexion tests S1-S2, hip
extension tests L5-S1, and big toe extension tests L5.
2. A 64-year-old male driver presents for his DOT exam. His signature is much less
legible than on his license, and he has lapses in concentration. What should the
examiner do next?
A) Obtain a non-DOT drug test
B) Perform cognitive testing
C) Refer to neurologist immediately
D) Issue a 1-year certificate
Correct Answer: B
Rationale: Changes in handwriting and concentration lapses warrant cognitive
screening (e.g., Mini-Cog) to rule out dementia or cognitive impairment before
certification.
3. A driver has a positive Romberg test. This indicates dysfunction in which
system?
A) Cerebellar
B) Proprioceptive/vestibular
1
,C) Cranial nerve III
D) Lower motor neuron
Correct Answer: B
Rationale: Romberg tests dorsal column (proprioception) and vestibular
pathways. A positive test (loss of balance with eyes closed) indicates sensory
ataxia.
4. Hyperactive deep tendon reflexes with clonus suggest:
A) Peripheral neuropathy
B) Upper motor neuron lesion
C) Lower motor neuron lesion
D) Myasthenia gravis
Correct Answer: B
Rationale: Hyperreflexia and clonus are hallmarks of upper motor neuron lesions
(e.g., stroke, spinal cord compression, multiple sclerosis).
5. A driver presents with acute unilateral facial droop, arm weakness, and slurred
speech. What is the appropriate action?
A) Issue a 3-month certificate
B) Send to emergency department immediately
C) Schedule MRI outpatient
D) Administer aspirin and observe
Correct Answer: B
Rationale: These are acute stroke symptoms requiring emergency evaluation.
Certification is contraindicated; the driver is not fit to operate a CMV.
6. Which cranial nerve is assessed by the gag reflex?
A) CN V and VII
B) CN IX and X
C) CN III and IV
D) CN XI and XII
Correct Answer: B
2
,Rationale: The gag reflex tests sensory CN IX (glossopharyngeal) and motor CN X
(vagus).
7. A driver reports a single seizure 8 months ago while off medication. Can he be
certified?
A) Yes, because it was a single seizure
B) No, because he has had a seizure within 12 months
C) Yes, if EEG is normal
D) Yes, with a 6-month certificate
Correct Answer: B
Rationale: FMCSA disqualifies drivers with a seizure within the past 12 months,
regardless of medication status. Exceptions require a waiver and 12-month
seizure-free interval off meds.
8. What is the minimum visual acuity for a commercial driver without a waiver?
A) 20/40 in each eye
B) 20/50 in the better eye
C) 20/70 in the better eye
D) 20/100 in the better eye
Correct Answer: A
Rationale: FMCSA requires 20/40 acuity in each eye (with or without correction)
for standard certification. Waivers allow 20/70 in the better eye.
9. A driver has nystagmus at rest. This is most consistent with:
A) Normal variant
B) Cerebellar or vestibular pathology
C) Peripheral nerve injury
D) Lumbar radiculopathy
Correct Answer: B
Rationale: Resting nystagmus indicates central (cerebellar/brainstem) or
vestibular pathology and requires further evaluation before certification.
10. The Babinski sign (extensor plantar response) in an adult indicates:
3
, A) Normal finding
B) Upper motor neuron lesion
C) Lower motor neuron lesion
D) Peripheral neuropathy
Correct Answer: B
Rationale: A positive Babinski (great toe extends, other toes fan) is abnormal in
adults and indicates an upper motor neuron lesion.
11. Dysdiadochokinesia (inability to perform rapid alternating movements)
indicates:
A) Cerebellar dysfunction
B) Basal ganglia dysfunction
C) Frontal lobe lesion
D) Spinal cord compression
Correct Answer: A
Rationale: Rapid alternating movements (e.g., pronation/supination) test
cerebellar function. Impairment suggests cerebellar disease.
12. A driver has a history of peripheral neuropathy. Which exam finding would be
most expected?
A) Hyperreflexia
B) Diminished ankle reflexes
C) Spasticity
D) Positive Babinski
Correct Answer: B
Rationale: Peripheral neuropathy affects lower motor neurons, causing
diminished or absent deep tendon reflexes (especially ankle jerk).
13. During the neurological exam, a driver has difficulty with heel-to-shin testing.
This suggests:
A) Sensory neuropathy
B) Cerebellar ataxia
C) Motor weakness only
4
