Manitoba Airbrake Practice Exam

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What is the minimum pressure for safe operation of air brakes?

  1. 80 psi

  2. 90 psi

  3. 100 psi

  4. 120 psi

The correct answer is: 90 psi

The minimum pressure for the safe operation of air brakes is generally set at 90 psi. This threshold ensures that the air braking system functions effectively, providing reliable stopping power and maintaining safety on the road. If air pressure falls below this level, the braking performance may degrade significantly, increasing the risk of failure, especially in emergency situations. The 90 psi level is established based on safety regulations and operational standards, ensuring that the braking system operates within the designed parameters for maximum effectiveness. Operating below this pressure can lead to compromised brake function and overall safety risks.

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