Alberta Class 4 Practice Questions - Alberta Class 4 Commercial Driver's Licence Knowledge Test Exam

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On a commercial passenger vehicle equipped with air brakes, at what minimum pressure must the low-pressure warning device activate?

250 kPa (35 psi) 380 kPa (55 psi) 550 kPa (80 psi) 725 kPa (105 psi)

Correct Answer:

380 kPa (55 psi)

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