Tas Heavy Vehicle Test Practice Questions - Tasmania Heavy Vehicle Licence Knowledge Test (Rigid Combination) Exam

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What is the principal risk of engaging auxiliary brakes (engine brake, exhaust brake or electric retarder) on a lightly loaded vehicle on slippery roads?

They reduce the effectiveness of the service brakes They can cause the vehicle to skid or jack-knife due to sudden retardation of the drive wheels They permanently damage the transmission if used in wet weather They cause the ABS system to deactivate

Correct Answer:

They can cause the vehicle to skid or jack-knife due to sudden retardation of the drive wheels

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