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Maine CDL — General Knowledge practice

Maine CDL — General Knowledge: Safe Driving Practices practice test

Following distance, scanning, blind spots, using your lights, and the habits that prevent crashes and keep you in control.

Content reviewed against official driver handbooks · August 12, 2026

16 questions · pass with 13 correct. You get instant feedback and an explanation after every answer.

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Study questions with answers

12 sample Safe Driving Practices questions with the correct answer, a short explanation, and the official handbook reference. Read through them, then take the quiz above.

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  1. 1. What does the inspection section say movement in the steering linkage can cause?

    Correct answer: The vehicle to wander or have other serious control problems

    Play in the linkage can make the vehicle wander, and worn, cracked, loose or broken steering parts can end in a complete loss of steering.

    Source: Maine Commercial Driver License Manual — Section 11.5.1, Front of Vehicle / Engine Area (Engine Off)

  2. 2. Before a winter trip, you expect to rely on mirror heaters and a fuel tank heater. What does the manual say to do?

    Correct answer: Check that they operate

    Along with the defrosters and cab heater, any other heaters you expect to need, such as mirror, battery box or fuel tank heaters, should be tested before you go.

    Source: Maine Commercial Driver License Manual — Section 2.13.1, Vehicle Checks

  3. 3. According to the inspection section, what can a leaf spring that has shifted out of place do?

    Correct answer: Strike a tire and cause a blowout, or interfere with steering

    A shifted spring can hit a tire and blow it out or get in the way of the steering, which is why springs and their mounts are checked for missing, shifted, cracked or broken parts.

    Source: Maine Commercial Driver License Manual — Section 11.5.2, Axle Components/Steering Axle

  4. 4. Before driving a bus, what should you do with open access panels for baggage, restroom service or the engine?

    Correct answer: Close them

    While checking the outside of the bus, the driver closes any open emergency exits and any open access panels before moving.

    Source: Maine Commercial Driver License Manual — Section 4.1.2, Access Doors and Panels

  5. 5. On the pre-trip equipment check for Maine's school bus examination, what share of the items must be checked properly to qualify?

    Correct answer: 80%

    The examiner keeps a score sheet, and the applicant has to check 80% of the listed items correctly. Falling short ends the test after the examiner reviews the missed items.

    Source: Maine Commercial Driver License Manual — Special Procedure for Obtaining a School Bus Endorsement

  6. 6. You are inspecting a tire and can see fabric through the sidewall. What does the manual say?

    Correct answer: The tire is defective; fabric must not be visible in the tread or sidewall

    Bad wear is a tire defect on any wheel position. Fabric visible in the tread or the sidewall means the tire is not fit to run.

    Source: Maine Commercial Driver License Manual — Section 2.1.3, What to Look For

  7. 7. As you walk up to your vehicle for an inspection, it is leaning to one side on level ground. What might that indicate?

    Correct answer: A suspension problem

    A sound vehicle sits level in both directions, lengthwise and across. A lean is a sign that something in the suspension may be wrong.

    Source: Maine Commercial Driver License Manual — Section 11.5.2, Axle Components/Steering Axle

  8. 8. You are assigned to haul heavy pieces of metal. What does the cargo section say about securing them?

    Correct answer: There are special securement requirements you should find out about first

    Beyond the general tie-down rules, the manual notes that various heavy metal pieces have special securing requirements and tells drivers to learn them before carrying such loads.

    Source: Maine Commercial Driver License Manual — Section 3.3.2, Cargo Tie-down

  9. 9. On the inspection test, the windshield must be free of obstructions. What single exception does the manual name?

    Correct answer: An inspection sticker

    The windshield has to be clean and undamaged, with nothing blocking the driver's viewing area other than an inspection sticker.

    Source: Maine Commercial Driver License Manual — Section 11.1.1, In-Vehicle/Engine Start

  10. 10. At the rear of the vehicle, what should you confirm about the splash guards?

    Correct answer: That they are present, undamaged, properly fastened and not dragging or rubbing the tires

    Splash guards are part of the rear walk-around: they should be there, in good shape, fastened correctly and clear of both the ground and the tires.

    Source: Maine Commercial Driver License Manual — Section 2.1.5, Seven-step Inspection Method

  11. 11. Why does the inspection test have you look for loose or cracked frame members?

    Correct answer: They can reduce stability and cause handling problems such as wandering or a rollover

    Frame members support the body. If they are loose or cracked, the vehicle can become unstable and hard to handle in corners, up to a total loss of control.

    Source: Maine Commercial Driver License Manual — Section 11.5.3, Side of Vehicle

  12. 12. On long runs you tend to hunt through radio stations while driving. What does the manual suggest instead?

    Correct answer: Pre-program your stations before you start driving

    The goal is to clear away in-vehicle distractions before the trip starts, which includes setting up radio presets and music ahead of time.

    Source: Maine Commercial Driver License Manual — Section 2.9.6, Don't Drive Distracted

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