Ohio CDL Class A Practice Exam Questions

Ohio CDL Class A Practice Exam Questions And Correct Answers (Verified Answers) Plus Rationales 2025|2026 Q&A | Instant Download Pdf

• What is the main reason to inspect your vehicle before a trip?
• To check tire pressure only
• To satisfy your employer
• To ensure the vehicle is safe to operate
• To save time on the road

Rationale: Federal and state law require inspections to ensure road safety

and prevent mechanical failures.

• Which of the following is part of the pre-trip inspection for the steering

system?

• Brake pads
• Air compressor
• Steering box and hoses 1 / 3

• Trailer coupling

Rationale: The steering system must be checked for leaks, damage, or

looseness to maintain control.

• If a tire blows out while driving, what should you do first?
• Brake hard immediately
• Turn sharply
• Hold the steering wheel firmly
• Accelerate quickly

Rationale: Maintaining control is the first priority before braking or

slowing down.

• What is the proper way to test service brakes?
• Press accelerator and brake together
• Pump brake pedal several times
• Move forward slowly and apply brakes firmly
• Pull the parking brake

Rationale: This ensures the brakes engage evenly and effectively during

movement.

5. When approaching a railroad crossing, you should:

• Speed up to cross quickly
• Slow down, look both ways, and listen
• Stop only if lights flash
• Honk your horn

Rationale: Always reduce speed and be alert for oncoming trains. 2 / 3

6. When backing a trailer, the trailer moves:

• In the same direction as the steering wheel
• In the opposite direction of the steering wheel
• Only straight back
• Randomly depending on load

Rationale: Turning the steering wheel one way moves the trailer the

opposite way.

• What should you do if the air pressure warning light comes on?
• Continue driving to the next stop
• Stop and safely check the system immediately
• Pump the brakes to build pressure
• Ignore it if the brakes feel fine

Rationale: Air pressure loss can cause brake failure — stop immediately.

• Which of the following is NOT part of the air brake system?
• Air compressor
• Air tanks
• Hydraulic lines
• Brake chambers

Rationale: Hydraulic lines are used in hydraulic systems, not air brakes.

9. When coupling a tractor and trailer, you should always:

• Leave the trailer brakes off
• Ensure the trailer is properly supported by the landing gear
• Turn the steering wheel full left
• / 3