What turns on the stop light switch in an air brake system?

A. Spring pressure
B. Hydraulic pressure
C. Air pressure
D. The driver turns on the switch by hand



Answer :

Final answer:

The stop light switch in an air brake system is activated through spring pressure or air pressure, crucial for signaling braking actions.


Explanation:

The stop light switch in an air brake system is turned on by:

  • Spring pressure. When the brake pedal is pressed, it compresses a spring in the stop light switch, activating it.
  • Air pressure. In an air brake system, the pressure from the compressed air is used to trigger the stop light switch.

These mechanisms are essential for signaling other drivers when the brakes are applied.


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