ACT Heavy Vehicle Knowledge Test Practice Questions - Heavy Vehicle Knowledge Test (Rigid Combination Road Rules Knowledge Test) Exam

What is the purpose of checking the coupling (fifth wheel or drawbar) before departing in a heavy combination vehicle?

To verify the trailer registration To ensure the coupling is correctly engaged and locked, preventing the trailer from detaching during travel To test the trailer's braking system To lubricate the drive axle

Correct Answer:

To ensure the coupling is correctly engaged and locked, preventing the trailer from detaching during travel

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