Practice Quiz

Commercial Driver's License

Category - Inspections

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When performing a pre-trip inspection for the parking brake, drivers should:
  1. Parking brakes do not fail, therefore do not need to be checked.
  2. Put the parking brake on, shift into low gear, slowly release clutch to see if brake holds.
  3. Put the parking brake on, shift into mid-gear, slowly release clutch to see if brake holds.
  4. Put parking brake on, shift into reverse, slowly release clutch to see if brake holds..
Explanation
Answer: B - Drivers should check the parking brake during a pre-trip inspection. The best way to do this is to put the parking brake on, shift into low gear, and slowly release the clutch to see if the brake holds. If the vehicle moves at all, the brake needs adjustment before starting the trip. Using a low, forward gear for this test helps protect the brakes and the clutch from damage.
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