Question

1. why is it important to remove some brake fluid from the master cylinder before retracting the caliper pistons?

○ to make replacing the fluid easier
○ to prevent fluid from spilling out of the reservoir
○ to make pushing the pistons back into their bores easier
○ all of the above

Explanation:

When retracting caliper pistons, the brake fluid volume in the system changes. Removing some fluid from the master cylinder prevents overflow (spilling from the reservoir) as the pistons moving back displaces fluid. It also doesn't directly relate to making fluid replacement easier or piston pushing easier in the way the other option is correct. The key reason is preventing spillage.

Answer:

B. To prevent fluid from spilling out of the reservoir