Air Break Practice Test

Results

#1. Which brakes are more powerful, the spring brakes or the service brakes?

The spring brakes are more powerful.

The spring brakes and service brakes are equally powerful.

The service brakes are more powerful.

It depends on the make and model of the vehicle.

The spring brakes activate only if air pressure has fallen to the point that service brake operation is impaired. Many vehicles can still be driven even with the spring brakes applied because they have less braking power than the service brakes