Spring brakes are also known as what?

Spring brakes are also known as what?

• A. Emergency Brakes
• B. Parking Brakes
• C. Service Brakes
• D. Emergency or Parking brakes

Answer: (D)

The main idea is that spring brakes perform both roles: they act as the emergency brake and as the parking brake on heavy vehicles. In normal operation, air pressure keeps the spring-loaded brakes released. If air pressure is lost or the parking brake control is engaged, the springs apply, stopping the vehicle. This dual function is why they’re described as emergency or parking brakes. Using just “emergency brakes” misses the parking-function aspect, and calling them just “parking brakes” misses the automatic emergency function; the service brakes are a separate part of the system activated by the foot pedal.

The main idea is that spring brakes perform both roles: they act as the emergency brake and as the parking brake on heavy vehicles. In normal operation, air pressure keeps the spring-loaded brakes released. If air pressure is lost or the parking brake control is engaged, the springs apply, stopping the vehicle. This dual function is why they’re described as emergency or parking brakes. Using just “emergency brakes” misses the parking-function aspect, and calling them just “parking brakes” misses the automatic emergency function; the service brakes are a separate part of the system activated by the foot pedal.