Class 3 Theory Test Practice Questions - NZTA Class 3 Heavy Vehicle Theory Test - Medium Combination Exam

What is the correct sequence for coupling a semi-trailer to a tractor?

Connect air lines, back under trailer, lock fifth wheel, perform tug test Inspect kingpin and fifth wheel, back tractor under trailer, lock fifth wheel, connect air/electrical lines, raise landing gear, perform tug test Connect electrical lines first, then back under, then connect air lines Lock the fifth wheel, connect lines, lower landing gear, drive forward

Correct Answer:

Inspect kingpin and fifth wheel, back tractor under trailer, lock fifth wheel, connect air/electrical lines, raise landing gear, perform tug test

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