Swiss Category C Theory (Truck) Practice Questions - Switzerland Driving Theory Test - Category C (Heavy Motor Vehicles) Exam

What is a 'Differential Lock' (Differenzialsperre) on a heavy truck drive axle, and when should it be engaged?

It locks the steering wheel in place while driving at 80 km/h It locks both wheels on the driven axle together so they rotate at the exact same speed, providing maximum traction on slippery mud, snow, or loose terrain; it must be disengaged before turning on dry asphalt It is engaged continuously on dry motorways to improve cornering It is used only when refueling the fuel tank

Correct Answer:

It locks both wheels on the driven axle together so they rotate at the exact same speed, providing maximum traction on slippery mud, snow, or loose terrain; it must be disengaged before turning on dry asphalt

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