Practice question

What is the purpose of the safety valve installed in an air brake system tank?

  1. To control cabin heating
  2. To prevent air from entering the compressor
  3. To release air pressure if it exceeds safe limits (typically 150 psi) to prevent tank rupture
  4. To automatically engage the emergency hazard lights

Answer: C — To release air pressure if it exceeds safe limits (typically 150 psi) to prevent tank rupture

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