Ontario Air Brake Z Test Practice Questions - Ontario Air Brake (Z Endorsement) Knowledge Test Exam

A low-air warning activates at 52 psi on the primary gauge and 58 psi on the secondary gauge. How is it judged?

Fail, because the warning must activate at or above 55 psi on both gauges Pass, because one gauge is above 55 psi Pass, because 60 psi is only typical Ignore the primary gauge

Correct Answer:

Fail, because the warning must activate at or above 55 psi on both gauges

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