All of the following statements are true EXCEPT:
A) disc brake systems always have a check valve.
B) a residual check valve would be a problem in split diagonal hybrid systems.
C) most master cylinders produced today are aluminum, with a plastic reservoir sealed to the cylinder with rubber grommets.
D) plastic reservoirs are transparent to allow the fluid level to be observed without removing the reservoir cover.

Question

Quizplus · Accepted Answer

Disc brake systems do not always have a check valve. The presence of a check valve is more common in drum brake systems to maintain a slight pressure or residual pressure in the hydraulic system to keep the drum brake shoes close to the drum's surface. In disc brake systems, this is generally not necessary because the design of the disc brake allows the pads to remain close to the rotor without the need for residual pressure.

All of the Following Statements Are True EXCEPT