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

What is the primary function of the Air Dryer (Lufttrockner) in a commercial vehicle's pneumatic brake system?

To cool the truck cabin on hot summer days To remove moisture and oil vapor from the compressed air before it enters the air reservoirs and valves, preventing internal corrosion and winter freezing of brake valves To blow warm air onto the front windshield wipers To dry the driver's clothing in rainy weather

Correct Answer:

To remove moisture and oil vapor from the compressed air before it enters the air reservoirs and valves, preventing internal corrosion and winter freezing of brake valves

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