Practice question

For an air-brake-equipped CMV in Georgia testing, what is the purpose of the air dryer in the brake system?

  1. To cool the air before storage
  2. To remove moisture and oil before air reaches the tanks
  3. To increase compressed air pressure
  4. To warn the driver of low pressure

Answer: B — To remove moisture and oil before air reaches the tanks

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