Question

1. why does the caliper piston have to be pushed back into the bore of the caliper?

○ when the brake pads wear, the piston has to move out to take up the space.
○ the new pads are thicker than the pads being replaced.
○ the caliper will not fit over the rotor with new pads installed.
○ all of the above

Explanation:

• First option: As brake pads wear, the piston moves out to maintain brake pad - rotor contact, so when replacing pads, the piston must be pushed back to accommodate new (thicker) pads.
• Second option: New brake pads are thicker than worn - out ones, so the piston (which moved out for worn pads) needs to be pushed back to fit the new, thicker pads.
• Third option: If the piston is not pushed back, the caliper (with new, thicker pads) will not be able to fit over the rotor as the space taken by the piston (outward) and new pads' thickness will prevent it. Since all three statements are correct reasons for pushing the caliper piston back, "All of the Above" is the right choice.

Answer:

D. All of the Above (assuming the last option is labeled D, if the original options were A, B, C, D with D as "All of the Above")