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

What is the critical 'engine lugging' risk when a driver shifts down too late going up a hill?

The engine generates too much power causing wheel spin The engine revs fall below maximum torque speed, causing shuddering or excessive vibration The gearbox automatically shifts to a higher gear causing over-revving The exhaust brake activates without warning

Correct Answer:

The engine revs fall below maximum torque speed, causing shuddering or excessive vibration

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