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Question
Vehicles with dual air brake systems:
Answers
A.  Maintain full-capacity air pressure in the braking systems even when the vehicle is not running.
B.  Maintain some air pressure in the braking systems when the vehicle is not running.
C.  Must be run to build enough air pressure to brakes to operate properly.
D.  Do not need time to build air pressure before a trip.
Explanation
Before driving a vehicle with a dual air brake system, you must allow the air compressor time to build up at least 100 psi of air pressure in both the primary and secondary systems.
Answer Statistics
25.11 % of our users get this question wrong.
This questions is considered quite Hard

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