Air Break Practice Test

Results

#1. If your vehicle is equipped with automatic slack adjusters, why must you fully apply the service brakes regularly?

To prevent the slack adjusters from corroding

To keep the slack adjusters properly adjusted

To prevent a clevis from seizing over time

To get a better feel for how these brakes respond

Automatic slack adjusters adjust themselves to compensate for excessive pushrod stroke. If you only make normal service brake applications of 40 – 50 psi (276 – 345 kPa), the automatic slack adjusters will maintain adjustment only for those shorter strokes, not for long strokes from full brake applications of 100 psi (690 kPa). Therefore, to keep automatic slack adjusters properly adjusted, make full brake applications regularly. For example, try to fully apply the service brakes every time you stop at a red light or stop sign