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

What does 'vehicle rollover' risk mean for heavy vehicles negotiating bends at speed?

The tyres roll over small obstacles on the road surface The vehicle may tip onto its side if centrifugal forces on a bend exceed the vehicle's lateral stability — especially when loaded with a high centre of gravity The transmission rolls over to a lower gear automatically The cargo rolls within the tray without restraint

Correct Answer:

The vehicle may tip onto its side if centrifugal forces on a bend exceed the vehicle's lateral stability — especially when loaded with a high centre of gravity

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