Air Break Practice Test

Results

#1. The coil spring in most spring parking brake chambers can exert a force of

3,500 – 4,000 pounds.

500 – 1,000 pounds.

1,500 – 2,000 pounds.

2,500 – 3,000 pounds.

The coil spring in most spring parking brake chambers can exert a force of 1,500 – 2,000 pounds (680 – 907 kg). Note that a fully charged and working air brake system can exert forces greater than this to get the spring parking brakes to release.