by alex
Get ready to test your knowledge and skills with our CDL Practice Test Quiz! This quiz is designed to help you prepare for the Commercial Driver’s License exam by covering key topics and regulations. Whether you’re a seasoned driver or just starting out, these questions will challenge your understanding and ensure you’re well-prepared. Good luck, and remember, every question you answer brings you one step closer to achieving your CDL!
CDL Practice Test Quiz Questions Overview
1. What is the maximum allowable blood alcohol concentration (BAC) for a commercial driver?
0.08%
0.04%
0.02%
0.00%
2. Which of the following is required to transport hazardous materials?
Tanker endorsement
Hazardous materials endorsement
Passenger endorsement
Double/triple trailer endorsement
3. What should you do if your vehicle starts to hydroplane?
Accelerate to regain control
Brake hard
Steer sharply
Ease off the accelerator and steer straight
4. How often should you inspect your cargo during a trip?
Every 100 miles
Every 150 miles
Every 250 miles
Every 300 miles
5. What is the purpose of the pre-trip inspection?
To check for fuel efficiency
To ensure the vehicle is safe to operate
To estimate travel time
To plan the route
6. Which of the following is a key factor in determining your stopping distance?
Traffic conditions
Weather conditions
Vehicle weight
All of the above
7. What should you do if you experience a tire blowout while driving?
Brake immediately
Accelerate to maintain speed
Hold the steering wheel firmly and gradually slow down
Turn on your hazard lights and stop immediately
8. What is the primary cause of skidding?
Excessive speed
Overloading the vehicle
Improper braking
All of the above
9. When should you use your vehicle’s horn?
To express frustration
To alert other drivers of your presence
To greet other drivers
To signal a turn
10. What is the purpose of the air brake system in a commercial vehicle?
To improve fuel efficiency
To provide emergency braking
To assist in steering
To stop the vehicle safely
11. What should you do if your brakes fail while driving downhill?
Shift to a lower gear
Accelerate to gain control
Turn off the engine
Use the parking brake
12. What is the proper way to make a right turn with a large commercial vehicle?
Swing wide to the left before turning
Turn from the left lane
Stay close to the curb
Make a sharp turn
13. What is the minimum following distance you should maintain behind another vehicle?
1 second
2 seconds
3 seconds
4 seconds
14. What is the purpose of the Federal Motor Carrier Safety Regulations (FMCSR)?
To regulate fuel prices
To ensure the safety of commercial drivers and the public
To promote interstate commerce
To manage traffic congestion
15. What should you do if you need to stop on the shoulder of the road?
Turn off your lights
Use your hazard lights and place warning devices
Park at an angle
Leave the engine running
16. What is the Gross Vehicle Weight Rating (GVWR)?
The weight of the vehicle without cargo
The maximum weight a vehicle can safely carry
The weight of the cargo only
The weight of the vehicle with a full tank of fuel
17. What is the purpose of the Electronic Logging Device (ELD) mandate?
To track vehicle speed
To monitor fuel consumption
To ensure compliance with hours-of-service regulations
To provide navigation assistance
18. What should you do if you encounter a low clearance bridge?
Speed up to pass quickly
Drive through if you think you might fit
Find an alternate route
Lower your tire pressure
19. What is the purpose of the anti-lock braking system (ABS)?
To increase braking power
To prevent wheel lockup during braking
To reduce brake wear
To enhance fuel efficiency
20. What should you do if you miss your exit on the highway?
Back up to the exit
Make a U-turn
Continue to the next exit
Stop and ask for directions
21. What is the primary function of the tachograph in a commercial vehicle?
To measure fuel efficiency
To record driving time and speed
To provide navigation assistance
To monitor tire pressure
