Air Break Practice Test

Results

#1. In which of the following situations should a spring parking brake chamber be caged?

When you’re leaving the engine running for an extended period

When the vehicle is to be towed after air pressure is lost

When the low air pressure warning device has activated

When you’re performing a pre-trip inspection of the brakes

If the spring parking brakes have come on because of a loss of air pressure in the braking system, they may have to be released to tow or repair the vehicle. Without air pressure, the only way to release a spring brake is to manually insert a release bolt into the spring brake chamber to release the spring. This is called “caging” the spring