California CDL Air Brakes Test

Which is the BEST one-sentence summary of why air brakes are designed to be 'fail-safe' through spring brakes?

So the truck can drive faster So that if the air system loses pressure, springs automatically apply the parking brake and stop the vehicle, preventing a runaway So they can be driven without inspection So they save fuel

Correct Answer:

So that if the air system loses pressure, springs automatically apply the parking brake and stop the vehicle, preventing a runaway

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