Practice question

A hydraulic-brake school bus pulls to one side when braking and that side's wheel runs hot with a sticking pedal-off drag. The MOST likely cause is:

  1. Air in the master cylinder reservoir cap vent
  2. A seized caliper piston or restricted/collapsed brake hose holding pressure to that wheel
  3. A worn serpentine belt
  4. A clogged air dryer

Answer: B — A seized caliper piston or restricted/collapsed brake hose holding pressure to that wheel

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