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

Why can't a dashboard pressure gauge alone prove every brake is correctly adjusted?

Above 90 psi proves no mechanical defects Gauges show tank pressure, not each chamber's applied pushrod stroke or adjustment limit Gauges show only lining thickness Pressure gauges are prohibited on dual systems

Correct Answer:

Gauges show tank pressure, not each chamber's applied pushrod stroke or adjustment limit

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