DOT Certification Exam: Newest
2025/2026 Complete Test Bank with
350+ Real Exam Questions and
Correct Detailed Answers (Graded
A+) plus Rationale[Brand New!!]
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
• 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
• Rationale: The gag reflex tests glossopharyngeal (CN IX, sensory)
and vagus (CN X, motor) nerves.
7. A positive Babinski sign indicates:
• 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.
8. 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.
9. 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).
, 10. 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
• D) Vestibular disorder
• Correct answer: B
• Rationale: Heel-to-shin testing assesses coordination. Difficulty
indicates cerebellar ataxia or proprioceptive loss.
11. What is the minimum horizontal field of vision required for a
commercial driver?
• A) 120 degrees
• B) 140 degrees
• C) 70 degrees
• D) 180 degrees
• Correct answer: C
• Rationale: FMCSA requires at least 70 degrees of horizontal field
of vision in each eye.
12. A driver has a history of traumatic brain injury (TBI) with
residual cognitive deficits. The examiner should:
• A) Automatically disqualify
• B) Perform neuropsychological testing and assess functional
capacity
• C) Issue a certificate if MRI is normal
• D) Refer to psychiatry only
• Correct answer: B
• Rationale: Cognitive deficits from TBI may affect driving safety.
Neuropsychological testing and functional assessment are needed
to determine fitness.
13. Which reflex tests the L5 nerve root?
• A) Knee jerk
• B) Ankle jerk
2025/2026 Complete Test Bank with
350+ Real Exam Questions and
Correct Detailed Answers (Graded
A+) plus Rationale[Brand New!!]
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
• 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
• Rationale: The gag reflex tests glossopharyngeal (CN IX, sensory)
and vagus (CN X, motor) nerves.
7. A positive Babinski sign indicates:
• 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.
8. 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.
9. 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).
, 10. 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
• D) Vestibular disorder
• Correct answer: B
• Rationale: Heel-to-shin testing assesses coordination. Difficulty
indicates cerebellar ataxia or proprioceptive loss.
11. What is the minimum horizontal field of vision required for a
commercial driver?
• A) 120 degrees
• B) 140 degrees
• C) 70 degrees
• D) 180 degrees
• Correct answer: C
• Rationale: FMCSA requires at least 70 degrees of horizontal field
of vision in each eye.
12. A driver has a history of traumatic brain injury (TBI) with
residual cognitive deficits. The examiner should:
• A) Automatically disqualify
• B) Perform neuropsychological testing and assess functional
capacity
• C) Issue a certificate if MRI is normal
• D) Refer to psychiatry only
• Correct answer: B
• Rationale: Cognitive deficits from TBI may affect driving safety.
Neuropsychological testing and functional assessment are needed
to determine fitness.
13. Which reflex tests the L5 nerve root?
• A) Knee jerk
• B) Ankle jerk
