Ohio CDL Final Exam Questions And Correct Answers
(Verified Answers) Latest Update 2026/2027 | Graded
A+ | Guaranteed Pass!!
1. What is the maximum allowable blood alcohol concentration
(BAC) for a CDL driver? A. 0.08%
B. 0.04%
C. 0.06%
D. 0.02%
CDL drivers are held to stricter standards. A BAC of 0.04% or
higher can result in disqualification.
2. When transporting hazardous materials, you must have:
A. A passenger endorsement
B. A hazardous materials endorsement
C. A tank vehicle endorsement
D. A doubles/triples endorsement
Drivers must be specially tested and cleared for hazardous
materials.
3. What is the main purpose of vehicle inspections?
A. To satisfy law enforcement
, B. To reduce insurance costs
C. To ensure safe operation
D. To save fuel
Inspections prevent accidents by detecting mechanical issues
early.
4. What should you do if your brakes get wet while driving?
A. Accelerate quickly
B. Stop immediately
C. Gently apply the brakes to create heat
D. Drive faster to dry them
Applying brakes lightly helps dry the system safely.
5. Which document must be in the vehicle when hauling
hazardous materials?
A. Driver’s logbook
B. Shipping papers
C. Vehicle title
D. Trip permit
Shipping papers identify the materials being transported for
safety and emergency response.
6. What is the proper way to check for hydraulic brake leaks?
A. Press accelerator and brake
, B. Pump brake pedal three times and hold
C. Check mirrors while braking
D. Measure brake chamber stroke
Holding pressure on the brake pedal will show if it slowly sinks,
indicating a leak.
7. Which factor is most important in safe driving on curves?
A. Lane position
B. Speed
C. Tire tread
D. Engine RPM
Excessive speed is the main cause of rollovers on curves.
8. Which brake system uses compressed air?
A. Hydraulic brakes
B. Air brakes
C. Vacuum brakes
D. Mechanical brakes
Commercial trucks commonly use air brakes for stopping heavy
loads.
9. A commercial vehicle must have how many red reflective
triangles?
, A. One
B. Two
C. Three
D. Four
Three triangles are required for emergency roadside protection.
10. Which brake is controlled by the foot pedal?
A. Trailer hand brake
B. Parking brake
C. Engine brake
D. Service brake
The service brake is the main brake system operated with the
foot pedal.
11. Which CDL class is required to operate a combination
vehicle over 26,001 pounds?
A. Class C
B. Class A
C. Class B
D. Class D
Class A is for combination vehicles with a GCWR of 26,001 lbs or
more.
12. What is the danger of traveling too fast downhill?
(Verified Answers) Latest Update 2026/2027 | Graded
A+ | Guaranteed Pass!!
1. What is the maximum allowable blood alcohol concentration
(BAC) for a CDL driver? A. 0.08%
B. 0.04%
C. 0.06%
D. 0.02%
CDL drivers are held to stricter standards. A BAC of 0.04% or
higher can result in disqualification.
2. When transporting hazardous materials, you must have:
A. A passenger endorsement
B. A hazardous materials endorsement
C. A tank vehicle endorsement
D. A doubles/triples endorsement
Drivers must be specially tested and cleared for hazardous
materials.
3. What is the main purpose of vehicle inspections?
A. To satisfy law enforcement
, B. To reduce insurance costs
C. To ensure safe operation
D. To save fuel
Inspections prevent accidents by detecting mechanical issues
early.
4. What should you do if your brakes get wet while driving?
A. Accelerate quickly
B. Stop immediately
C. Gently apply the brakes to create heat
D. Drive faster to dry them
Applying brakes lightly helps dry the system safely.
5. Which document must be in the vehicle when hauling
hazardous materials?
A. Driver’s logbook
B. Shipping papers
C. Vehicle title
D. Trip permit
Shipping papers identify the materials being transported for
safety and emergency response.
6. What is the proper way to check for hydraulic brake leaks?
A. Press accelerator and brake
, B. Pump brake pedal three times and hold
C. Check mirrors while braking
D. Measure brake chamber stroke
Holding pressure on the brake pedal will show if it slowly sinks,
indicating a leak.
7. Which factor is most important in safe driving on curves?
A. Lane position
B. Speed
C. Tire tread
D. Engine RPM
Excessive speed is the main cause of rollovers on curves.
8. Which brake system uses compressed air?
A. Hydraulic brakes
B. Air brakes
C. Vacuum brakes
D. Mechanical brakes
Commercial trucks commonly use air brakes for stopping heavy
loads.
9. A commercial vehicle must have how many red reflective
triangles?
, A. One
B. Two
C. Three
D. Four
Three triangles are required for emergency roadside protection.
10. Which brake is controlled by the foot pedal?
A. Trailer hand brake
B. Parking brake
C. Engine brake
D. Service brake
The service brake is the main brake system operated with the
foot pedal.
11. Which CDL class is required to operate a combination
vehicle over 26,001 pounds?
A. Class C
B. Class A
C. Class B
D. Class D
Class A is for combination vehicles with a GCWR of 26,001 lbs or
more.
12. What is the danger of traveling too fast downhill?
