Question

When testing the low-pressure warning signal, turn the electrical power on and step on and off the brake pedal to reduce air tank pressure. The low air pressure warning signal must come on before the pressure drops to less than ____ psi in the air tank.

a) 60
b) 80
c) 100
d) 120

Answer 1

The low air pressure warning signal in a vehicle's air brake system must activate before the tank pressure drops below 60 psi.

Step-by-step explanation:

When testing the low-pressure warning signal for a vehicle's air brake system, the low air pressure warning signal must come on before the pressure in the air tank drops to less than 60 psi. It is critical that this safety feature activates at the correct pressure level to alert the driver that there is not enough air pressure in the system to effectively operate the brakes. Regular checks and proper maintenance of the air brake system can ensure the safety of the vehicle on the road.