Question

technician a says that a steel piston should have a greater piston - to - caliper bore clearance than a phenolic piston because the steel piston will expand when the brake fluid temperature increases during normal braking. technician b says that the phenolic piston should have the greater clearance. which technician is correct?
technician a only
technician b only
both technicians
neither technician
question 12
1 pts
a vehicle pulls to one side when braking. this could be caused by all of these except ______.
stuck caliper piston
bad master cylinder
unequal tire pressures
restricted brake hose

Explanation:

First Question (Technician A vs B):

Steel expands more with temperature than phenolic (a type of plastic/resin). So steel pistons need more clearance to expand without binding. Technician A is correct, B is wrong.

• Stuck caliper piston: Causes uneven braking (pulls to one side).
• Unequal tire pressures: Uneven traction, causes pulling.
• Restricted brake hose: Uneven fluid flow, uneven braking.
• Bad master cylinder: Typically causes issues like soft pedal or no pressure, not side - pulling. So the bad master cylinder is the exception.

Answer:

Technician A only

Question 12: