DOT Medical Certification Exam Verified
Questions, Correct Answers, and Detailed
Explanations for Science Students||Already
Graded A+
1. Which of the following conditions requires immediate evaluation
by a medical examiner for commercial driving?
A. Mild seasonal allergies
B. Controlled hypertension
C. History of a heart attack within the past 6 months
D. Corrected vision of 20/40 in both eyes
Answer: C
Rationale: A recent heart attack increases the risk of sudden
incapacitation, which is a serious safety concern for commercial
drivers.
2. What is the minimum vision requirement for a commercial
driver’s medical certification?
A. 20/50 in both eyes
B. 20/40 in each eye, with or without correction
C. 20/30 in the better eye
D. 20/100 in one eye
Answer: B
Rationale: DOT regulations require drivers to have at least 20/40
vision in each eye, either naturally or with corrective lenses.
3. A driver reports taking a prescribed sedating medication. The
medical examiner should:
A. Approve certification without further inquiry
B. Deny certification automatically
C. Assess whether the medication impairs driving ability
D. Ignore it if the driver feels fine
,Answer: C
Rationale: Sedating medications may impair safe driving, and a
medical examiner must evaluate the risk before certifying.
4. What is the maximum acceptable blood pressure for a
commercial driver under DOT regulations?
A. 160/100 mmHg
B. 140/90 mmHg
C. 130/80 mmHg
D. 150/95 mmHg
Answer: A
Rationale: DOT guidelines allow a maximum of 160/100 mmHg;
above this, drivers require medical management before certification.
5. Which condition disqualifies a driver from certification?
A. Well-controlled diabetes
B. Single seizure more than 10 years ago
C. Epilepsy requiring ongoing treatment
D. Seasonal allergies
Answer: C
Rationale: Active epilepsy with ongoing treatment poses a high risk
for sudden incapacitation, disqualifying the driver.
6. How often must a commercial driver undergo a medical
examination?
A. Every 6 months
B. Every 12 months
C. Every 24 months
D. Only once, at initial licensing
Answer: B
Rationale: DOT requires a medical exam every 12 months, though
more frequent exams may be required for certain conditions.
, 7. Which of the following hearing abilities is required for
certification?
A. Ability to hear a forced whisper at 5 feet in one ear
B. Ability to hear normal speech at 10 feet in one ear
C. Hearing aids are prohibited
D. Ability to hear a whisper at 10 feet in both ears
Answer: A
Rationale: DOT requires hearing of a forced whisper at 5 feet in at
least one ear, with or without hearing aids.
8. A driver reports frequent episodes of sleep apnea. The medical
examiner should:
A. Certify immediately
B. Require a sleep study and treatment compliance
C. Ignore unless daytime sleepiness is present
D. Deny certification permanently
Answer: B
Rationale: Untreated sleep apnea can cause fatigue and sudden sleep
episodes while driving; certification requires documentation of
treatment compliance.
9. Which body mass index (BMI) is considered a potential risk factor
needing further evaluation?
A. 18
B. 22
C. 30
D. 24
Answer: C
Rationale: BMI ≥30 may indicate obesity, increasing risk for sleep
apnea, hypertension, and other conditions affecting driving safety.
10. For diabetes, which of the following is acceptable for DOT
certification?
Questions, Correct Answers, and Detailed
Explanations for Science Students||Already
Graded A+
1. Which of the following conditions requires immediate evaluation
by a medical examiner for commercial driving?
A. Mild seasonal allergies
B. Controlled hypertension
C. History of a heart attack within the past 6 months
D. Corrected vision of 20/40 in both eyes
Answer: C
Rationale: A recent heart attack increases the risk of sudden
incapacitation, which is a serious safety concern for commercial
drivers.
2. What is the minimum vision requirement for a commercial
driver’s medical certification?
A. 20/50 in both eyes
B. 20/40 in each eye, with or without correction
C. 20/30 in the better eye
D. 20/100 in one eye
Answer: B
Rationale: DOT regulations require drivers to have at least 20/40
vision in each eye, either naturally or with corrective lenses.
3. A driver reports taking a prescribed sedating medication. The
medical examiner should:
A. Approve certification without further inquiry
B. Deny certification automatically
C. Assess whether the medication impairs driving ability
D. Ignore it if the driver feels fine
,Answer: C
Rationale: Sedating medications may impair safe driving, and a
medical examiner must evaluate the risk before certifying.
4. What is the maximum acceptable blood pressure for a
commercial driver under DOT regulations?
A. 160/100 mmHg
B. 140/90 mmHg
C. 130/80 mmHg
D. 150/95 mmHg
Answer: A
Rationale: DOT guidelines allow a maximum of 160/100 mmHg;
above this, drivers require medical management before certification.
5. Which condition disqualifies a driver from certification?
A. Well-controlled diabetes
B. Single seizure more than 10 years ago
C. Epilepsy requiring ongoing treatment
D. Seasonal allergies
Answer: C
Rationale: Active epilepsy with ongoing treatment poses a high risk
for sudden incapacitation, disqualifying the driver.
6. How often must a commercial driver undergo a medical
examination?
A. Every 6 months
B. Every 12 months
C. Every 24 months
D. Only once, at initial licensing
Answer: B
Rationale: DOT requires a medical exam every 12 months, though
more frequent exams may be required for certain conditions.
, 7. Which of the following hearing abilities is required for
certification?
A. Ability to hear a forced whisper at 5 feet in one ear
B. Ability to hear normal speech at 10 feet in one ear
C. Hearing aids are prohibited
D. Ability to hear a whisper at 10 feet in both ears
Answer: A
Rationale: DOT requires hearing of a forced whisper at 5 feet in at
least one ear, with or without hearing aids.
8. A driver reports frequent episodes of sleep apnea. The medical
examiner should:
A. Certify immediately
B. Require a sleep study and treatment compliance
C. Ignore unless daytime sleepiness is present
D. Deny certification permanently
Answer: B
Rationale: Untreated sleep apnea can cause fatigue and sudden sleep
episodes while driving; certification requires documentation of
treatment compliance.
9. Which body mass index (BMI) is considered a potential risk factor
needing further evaluation?
A. 18
B. 22
C. 30
D. 24
Answer: C
Rationale: BMI ≥30 may indicate obesity, increasing risk for sleep
apnea, hypertension, and other conditions affecting driving safety.
10. For diabetes, which of the following is acceptable for DOT
certification?
