Practice Quiz

Commercial Drivers License Exam Prep - Question List

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21. When retarders are turned ON, they apply braking power:
  1. To all wheels on the tractor but not to the trailer
  2. To all wheels, truck and trailer alike
  3. To the drive wheels only
  4. Only to the tractor wheels
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22. Knowing how to down shift commercial vehicles with manual transmissions is important. Which of the following is the correct way to downshift?
  1. Release pressure on accelerator, depress clutch, shift to neutral simultaneously, release clutch, depress accelerator, increase rpms to required level for next lowest gear, depress clutch and shift to next lower gear simultaneously, release clutch and dep
  2. Hold accelerator down, depress clutch, release clutch, depress clutch while shifting to next lower gear, release clutch.
  3. Release accelerator, depress clutch, shift to next lower gear, release clutch and press down on accelerator at the same time.
  4. Hold accelerator pressure, depress clutch, shift to neutral and then shift to next lower gear, release clutch.
  5. None of the above
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23. When signaling to make a turn, commercial drivers should:
  1. Cancel their signal as soon as they begin their turn
  2. Signal early
  3. Leave signal on until the turn is complete
  4. Use hand signals whenever possible
  5. B and C
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24. Which of the following is true concerning the operation of a commercial vehicle?
  1. In some states, trucks and buses are required to drive at slower speeds than non-commercial vehicles, if posted to do so.
  2. Commercial vehicles are allowed to drive over the posted speed limit on some isolated roadways.
  3. Commercial vehicles are not allowed to use the "fast lane" when passing another vehicle.
  4. None of the above
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25. When operating a commercial vehicle on snow packed roads, drivers should reduce their speed by at least:
  1. 1/3
  2. 2/3
  3. 1/2
  4. None of the above
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