BC Class 2 Bus Practice Questions - British Columbia Class 2 Commercial Bus Driver's License Knowledge Test Exam

What is the main purpose of the safety valve in an air brake system reservoir?

To protect the system from over-pressurization if the governor fails to cut out, typically set to open at 150 psi To drain moisture from the tanks automatically To apply the spring brakes if air pressure drops To prevent oil from entering the brake lines

Correct Answer:

To protect the system from over-pressurization if the governor fails to cut out, typically set to open at 150 psi

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