What should the brake pipe pressure be maintained above to ensure sufficient braking power?

To ensure sufficient braking power, the brake pipe pressure must be maintained above a certain threshold, which is critical for the effective functioning of the braking system in engineering applications. Maintaining a brake pipe pressure of 90 psi is essential as it provides the necessary force for the brakes to engage properly, allowing for safe and effective stopping capabilities.

When the pressure is at or above this level, it ensures that the braking components receive the appropriate hydraulic force to operate optimally. Lower pressures might not activate the brake mechanism efficiently, particularly under heavy load conditions or emergency situations where quick stops are required. Thus, 90 psi is recognized as the minimum threshold that balances safety and operational efficiency in the braking system.