Practice Quiz

Commercial Drivers License Exam Prep

Category - CDL

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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
Explanation
Answer: A - The air pressure loss in a single vehicle with a fully charged air brake system should be less than 2 psi per minute. This test should be performed during all pre-trip inspections. It is also a part of the CDL test. If a single vehicles loses air pressure in excess of 2 psi per minute, the vehicle must be inspected by a qualified mechanic.
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