The spring-loaded brake has been applied on a truck which has broken down with engine failure. The air supply is exhausted. What effect does this have?

The correct combination of answers reflects the functioning of the spring-loaded brake system on a truck that has broken down.

1. The first point indicates that the spring-loaded brake will not respond to the activation of the handbrake valve when the air supply is exhausted. This is crucial because the brake relies on air pressure to release and engage properly. If there is no air, you cannot control the brake using the handbrake valve.

2. The second point states that to tow the vehicle, the spring-loaded brake must be manually released using the emergency release device. This is necessary to safely tow the truck since leaving the brake engaged can cause damage or create hazards on the road.

Understanding these points is vital in compliance with German traffic regulations, as they ensure both the safety of the vehicle being towed and that of other road users. Always follow proper procedures when dealing with malfunctioning braking systems to avoid accidents and ensure legal compliance.