What can cause the filling time of an air brake system to be longer than normal?

The selected combination of options is correct because both leaking air tanks or connectors and inadequate air compressor performance directly affect the efficiency of the air brake system. According to German traffic regulations, it is essential for vehicles to have fully operational braking systems for safety.

Leaking air tanks or connectors can lead to a loss of air pressure, causing the filling time for the brake system to increase. Similarly, if the air compressor cannot perform adequately, it will not deliver enough air to fill the system quickly, also prolonging the filling process.

While too much water in the air tanks can cause other issues, it does not directly relate to the filling time in the same way. Therefore, it is crucial to recognize the relevance of all correct options to ensure maximum braking efficiency and compliance with legal safety standards on the roads.