Class 3 Theory Test Practice Questions - NZTA Class 3 Heavy Vehicle Theory Test - Medium Combination Exam

At approximately what pressure does the low-air-pressure warning activate in a typical heavy vehicle air brake system?

30 psi / 200 kPa 60 psi / 415 kPa 90 psi / 620 kPa 120 psi / 830 kPa

Correct Answer:

60 psi / 415 kPa

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