Which of the following are function(s) of slack adjusters used on truck air brake systems?

A) multiply force applied to the S-cams
B) define shoe to drum freeplay
C) convert linear force to rotational force
D) all of the above

Slack Adjusters

Components in a vehicle's brake system that adjust the brakes as they wear, ensuring consistent braking performance.

S-Cams

Components used in drum brakes, shaped like an "S", which turn and push brake shoes out against the drum to stop a vehicle.

Linear Force

A force that acts in a straight line, applying push or pull in a single direction to move or support objects.