Practice question

For the Washington CDL Air Brakes knowledge test, what is the typical reason a driver fails the static air loss rate test in a pre-trip?

  1. The compressor is too quiet
  2. Air leaks in a brake chamber, fitting, hose, glad hand, or valve that exceed the legal psi/minute limit
  3. The brakes are too cold
  4. The engine is too small

Answer: B — Air leaks in a brake chamber, fitting, hose, glad hand, or valve that exceed the legal psi/minute limit

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Practice more: Washington CDL Air Brakes Test Practice Questions - Washington Commercial Driver License (CDL) Air Brakes Knowledge Test Exam →