Question:
When operating a vehicle with a dual air brake system, what should the driver do?
A
Let the air compressor build up a minimum of 100 psi pressure in the primary and secondary systems before driving.
explanation
Before driving a vehicle with a dual air system, allow time for the air compressor to build up a minimum of 100 psi pressure in both the primary and secondary systems. Watch the primary and secondary air pressure gauges (or needles, if the system has 2 needles in one gauge). [Commercial Driver Handbook]
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