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Question
Before a vehicle with dual air brakes is driven, pressure of at least ____ should be built up in both braking systems.
Answers
A.  10 psi
B.  25 psi
C.  50 psi
D.  100 psi
Explanation
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

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