Ace Your DMV Written Test with our Guaranteed Cheat Sheet.
Cheat sheet
Before a vehicle with dual air brakes is driven, pressure of at least ____ should be built up in both braking systems.
A.  10 psi
B.  25 psi
C.  50 psi
D.  100 psi
Before driving a vehicle with a dual air brake system, allow time for the air compressor to build up pressure of at least 100 psi in both the primary and secondary systems.
Answer Statistics
11.18 % of our users get this question wrong.
This question's difficulty is Medium

Pass your DMV Written Test with flying colors

Our Latest Videos
Ace Your DMV Written Test
Get your Cheat Sheet Now!