Air Break Practice Test

Results

#1. Cut-in pressure must never be lower than

690 kPa (100 psi).

414 kPa (60 psi).

552 kPa (80 psi).

345 kPa (50 psi).

Air brake system pressure must never be lower than 552 kPa (80 psi). This is an absolute minimum; many manufacturers will set a higher minimum pressure.