Brakes (A5)Question 61 of 120
A proportioning valve in the brake system is designed to:
a.Reduce pressure to the rear brakes to prevent early lockup
b.Increase pressure to the front only
c.Store extra brake fluid
d.Operate the parking brake
Explanation
Because weight shifts forward during braking, the proportioning valve limits rear brake pressure to keep the rear wheels from locking prematurely. This maintains stability during hard stops. Many vehicles now handle this function electronically through ABS/EBD.
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