Practice question

How must a driver perform a 'tug test' during the coupling process?

Pull hard on the trailer glad hands by hand
With the trailer brakes applied, gently try to pull the tractor forward to ensure the fifth wheel jaws have locked around the kingpin
Accelerate the tractor to 20 km/h and apply the trailer hand valve
Tug on the landing gear crank handle to check if it is locked

Answer: B — With the trailer brakes applied, gently try to pull the tractor forward to ensure the fifth wheel jaws have locked around the kingpin

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