Practice Test Geeks(CDT) Certified Driver Trainer Practice Test
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Vehicle Operations & Maintenance Flashcards

7 cards from real CDT practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Vehicle Operations & Maintenance flashcards as text

  1. During a pre-trip inspection, the driver finds the steering box has visible play exceeding limits. What is the correct action?

    Answer: Place the vehicle out of service and arrange for repair before operating

    Excessive steering play is an Out of Service defect; operating the vehicle with unsafe steering endangers the driver and the public.

  2. What is the effect of overloading a commercial vehicle beyond its GVWR?

    Answer: It increases stopping distance, stresses components, and may void warranties and violate regulations

    Overloading increases braking distance, stresses axles, tires, and frame components, increases rollover risk, and violates federal and state weight regulations.

  3. When teaching backing skills, a driver-trainer should instruct students to begin the maneuver by:

    Answer: Getting out and walking the path (G.O.A.L.) before backing

    G.O.A.L. (Get Out And Look) before backing is the foundation of safe backing — it reveals hazards that mirrors cannot show.

  4. Which condition would cause an air brake system to fail to hold pressure overnight?

    Answer: A leaking air line fitting, chamber diaphragm, or valve seal

    Air leaking through a fitting, diaphragm crack, or valve seal will drain reservoir pressure overnight, causing spring brakes to release automatically.

  5. What is the purpose of alcohol evaporators or air dryers in commercial vehicle air brake systems?

    Answer: To remove moisture from compressed air and prevent freezing in brake lines

    Air dryers and alcohol evaporators remove moisture from compressed air to prevent water from accumulating in lines and freezing in cold weather.

  6. A student driver is operating on a slippery road and the trailer begins to swing outward (trailer jackknife). The correct recovery action is:

    Answer: Release the brakes immediately and steer to reclaim traction

    Releasing the brakes allows wheels to regain rolling traction; steering correction can then bring the trailer back into alignment.

  7. Which of the following is the BEST reason to use lower gears when descending a steep grade?

    Answer: Engine braking in lower gears controls speed without heating service brakes

    Using a low gear on downgrades lets the engine compression act as a continuous brake, preventing the service brakes from overheating and fading.