Practice Quiz

Commercial Drivers License Exam Prep - Question List

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11. If approaching a railroad crossing and the driver sees a train in the distance, it is advisable to:
  1. Speed up to beat the train.
  2. Quickly calculate the train's speed and race it if it seems safe to do so.
  3. Never try to race a train to the crossing as it is hard to judge train speed.
  4. None of the above
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12. What should the air pressure loss be in a single vehicle with a fully charged air brake system?
  1. Less than 2 psi per minute
  2. Less than 3 psi per minute
  3. Less than 4 psi per minute
  4. Less than 5 psi per minute
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13. Underloaded front axles are most often caused by which of the following?
  1. Too much weight placed toward the front
  2. Too much weight placed on the center
  3. Not enough weight placed on the center
  4. Too much weight placed at the rear
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14. Which of the following may occur if a driver applies too much speed when starting from a stopped position on wet or slick roads?
  1. The front tires may spin.
  2. The driver tires may spin.
  3. The trailer tires may spin.
  4. All tires may spin.
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15. When entering or crossing traffic, commercial drivers must be aware of which of the following factors?
  1. The weight of their vehicle
  2. The size of their vehicle
  3. Oncoming traffic
  4. Pedestrians and bikers
  5. All of the above
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