CDL Practice Test - General Knowledge

55 Questions | Total Attempts: 32360

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CDL Practice Test - General Knowledge

Prepare yourself to get your CDL A license. Become a great truck driver and get your license with ease by practicing the CDL test before you actually take it.


Questions and Answers
  • 1. 
    Which of the following is true about how to mark a stopped vehicle?
    • A. 

      Keep the vehicle taillights on.

    • B. 

      If you are stopped longer than 10 minutes, put out reflective triangles at 10, 100 and 200 feet from the vehicle.

    • C. 

      Place a triangle back beyond a hill that prevents oncoming traffic from seeing your vehicle within 250 feet.

    • D. 

      Don't use the four-way flashers in daylight.

  • 2. 
    When traveling down a steep hill, how should you use your brakes? 
    • A. 

      Pump the brakes lightly.

    • B. 

      Pump the brakes using lots of pressure.

    • C. 

      Light, even and steady pressure.

    • D. 

      Use strong pressure that increase as you move downward.

  • 3. 
    What can cause you to skid?
    • A. 

      Over accelerating.

    • B. 

      Turning too slowly.

    • C. 

      Not using your brakes.

    • D. 

      All of the above.

  • 4. 
    In a pre-trip inspection, what should you check for in your wheels and rims? 
    • A. 

      Look for rust around wheel nuts, which indicates looseness.

    • B. 

      Cracked or damaged wheels or rims.

    • C. 

      Mismatched or bent lock rims.

    • D. 

      All of the above.

  • 5. 
    Retarders:
    • A. 

      Provide emergency braking.

    • B. 

      Apply extra braking power to the non-drive axles.

    • C. 

      Help slow the vehicle and reduce brake wear.

    • D. 

      Prevent skidding.

  • 6. 
    During a pre-trip inspection, check your brakes and suspensions system for: 
    • A. 

      Brake shoes and pads with fluid in them.

    • B. 

      Shoes worn thinner than 1/4 inch.

    • C. 

      Cracked, missing, or broken parts.

    • D. 

      All of the above.

  • 7. 
    When traveling at highway speed, you should look ahead: 
    • A. 

      1/8 mile.

    • B. 

      1/32 mile.

    • C. 

      1/4 mile.

    • D. 

      1/10 mile.

  • 8. 
    In a pre-trip inspection, what should your tires look like? 
    • A. 

      Tires are not mismatched in size and ply, and tires are not work or damaged.

    • B. 

      Tread depth should be less than 4/32 inch on the front tires, and 2/32 inch on all other tires.

    • C. 

      Dual tires should be touching.

    • D. 

      All of the above.

  • 9. 
    What is important to know about loading cargo? 
    • A. 

      Make sure that the cargo is low and even.

    • B. 

      Put lighter cargo toward the back.

    • C. 

      The higher the center of gravity, the safer the cargo is.

    • D. 

      All of the above.

  • 10. 
    On the freeway during rush hour where most cars are going 35 miles per hour, the safest speed for your vehicle is: 
    • A. 

      20 miles per hour.

    • B. 

      25 miles per hour.

    • C. 

      35 miles per hour.

    • D. 

      45 miles per hour.

  • 11. 
    You can use water on what type of fires?
    • A. 

      Electrical fires.

    • B. 

      Gasoline fires.

    • C. 

      Tire fires.

    • D. 

      All of the above.

  • 12. 
    Federal and state laws prohibit driving an unsafe vehicle, so you should make sure that you fix which of the following problems?
    • A. 

      A small leak of power steering fluid.

    • B. 

      Steering wheel play of more than 10 degrees (2 inches on a 20 inch wheel).

    • C. 

      A leak in the exhaust system.

    • D. 

      All of the above.

  • 13. 
    What can cause a truck fire?
    • A. 

      Tires with low pressure.

    • B. 

      Electrical short circuit.

    • C. 

      Flammable cargo.

    • D. 

      All of the above.

  • 14. 
    Use the B:C fire extinguishers on:
    • A. 

      Burning liquids and electrical fires.

    • B. 

      Wood and paper fires.

    • C. 

      Cloth fires.

    • D. 

      All of the above.

  • 15. 
    At night you should always:
    • A. 

      Watch the vehicles that are approaching.

    • B. 

      Make sure that your stopping distance is within your sight distance.

    • C. 

      Driver faster with low beams than high beams.

    • D. 

      All of the above.

  • 16. 
    What is important to remember about using mirrors?
    • A. 

      Even when using mirrors, there may be "blind spots".

    • B. 

      You should check your mirrors twice before making a lane change.

    • C. 

      Convex mirrors make things look closer.

    • D. 

      Look in the mirror for several seconds each time.

  • 17. 
    Who is responsible for making sure that cargo is not overloaded?
    • A. 

      The driver.

    • B. 

      State and federal agents.

    • C. 

      The shipper.

    • D. 

      All of the above.

  • 18. 
    During hot weather, your tires:
    • A. 

      Can be cooled by driving if they overheat.

    • B. 

      Decrease in air pressure as the weather gets warmer.

    • C. 

      Should be inspected every 100 miles or two hours.

    • D. 

      All of the above.

  • 19. 
    If your hydraulic brakes go out, what should you do?
    • A. 

      Try pumping the brakes to generate pressure.

    • B. 

      Downshift.

    • C. 

      Use the parking brake.

    • D. 

      All of the above.

  • 20. 
    Sign(s) of tire failure is(are):
    • A. 

      A loud bang.

    • B. 

      Heavy steering.

    • C. 

      Vibration.

    • D. 

      All of the above.

  • 21. 
    While driving, you should look ahead:
    • A. 

      1 to 3 seconds.

    • B. 

      6 to 9 seconds.

    • C. 

      12 to 15 seconds.

    • D. 

      20 to 25 seconds.

  • 22. 
    Whenever you are tailgated you should:
    • A. 

      Increase the space in front of you.

    • B. 

      Go faster.

    • C. 

      Slow down.

    • D. 

      Flash your taillights.

  • 23. 
    Hydroplaning:
    • A. 

      Occurs when water or slush forms a film between the tires and the road.

    • B. 

      Can occur at any speed.

    • C. 

      Is more likely to occur when tire pressure is low.

    • D. 

      All of the above.

  • 24. 
    When using retarders, what is a major concern?
    • A. 

      They cause extra brake wear.

    • B. 

      They may cause the drive wheels to skid when the traction is poor.

    • C. 

      Their use may be illegal on some highways.

    • D. 

      They can cause the steering axle brakes to quit.

  • 25. 
    Speed and weight have what type of effect on stopping distance?
    • A. 

      Empty trucks have a shorter stopping distance.

    • B. 

      When you double your speed, it will take three times the distance to stop.

    • C. 

      The heavier the vehicle, the more the brakes have to stop.

    • D. 

      All of the above.

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