Everything on the Combination Vehicles test — coupling, fifth wheel, jackknife prevention.
Read Guide →The 10-step coupling procedure from back under to tug test.
Read Guide →What causes a jackknife and techniques to prevent trailer swing.
Read Guide →How to inspect the fifth wheel — locking mechanism, mounting bolts, and angle.
Read Guide →How trailer air systems work — red emergency line, blue service line, relay valves.
Read Guide →Tractor-trailer driving differences — off-tracking, turns, stopping, clearance.
Read Guide →