Practice question

What are the standard compressor cut-in and cut-out pressure ranges for a commercial air brake system?

  1. Cut-in at 250 kPa (35 psi) and cut-out at 550 kPa (80 psi)
  2. Cut-in at 550 kPa (80 psi) and cut-out at 725 kPa (105 psi)
  3. Cut-in at 550–690 kPa (80–100 psi) and cut-out at 825–930 kPa (120–135 psi)
  4. Cut-in at 825 kPa (120 psi) and cut-out at 1030 kPa (150 psi)

Answer: C — Cut-in at 550–690 kPa (80–100 psi) and cut-out at 825–930 kPa (120–135 psi)

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