In an air-brake system, what factor ensures the spring brakes remain retracted during normal operation?

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Study for the Alabama CDL General Test. Prepare with multiple choice questions, each with hints and explanations. Ready yourself for success!

Multiple Choice

In an air-brake system, what factor ensures the spring brakes remain retracted during normal operation?

Explanation:
Spring brakes are spring-applied, air-released. The air pressure in the brake chambers counteracts the force of the release springs, keeping them retracted and the brakes released during normal operation. If air pressure drops, the springs push out to apply the brakes. Hydraulic pressure, oil temperature, or tire pressure don’t control this release mechanism.

Spring brakes are spring-applied, air-released. The air pressure in the brake chambers counteracts the force of the release springs, keeping them retracted and the brakes released during normal operation. If air pressure drops, the springs push out to apply the brakes. Hydraulic pressure, oil temperature, or tire pressure don’t control this release mechanism.

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