Question

At what pressure does the low air pressure signal activate in a large bus?

1) 60
2) 80
3) 100
4) 120

Answer 1

The low air pressure signal in a large bus generally activates at 60 psi to notify the driver of a potential problem with the braking system.

Step-by-step explanation:

The low air pressure signal in a large bus is designed to activate at a specific pressure threshold to alert the driver of potential safety issues with the braking system. In commercial vehicles, including large buses, this warning signal typically activates when the air pressure in the system falls to about 60 psi (pounds per square inch). This is a critical safety feature, as the air brake system relies on sufficient air pressure to function properly, and a drop below this level could indicate a leak or other problem that requires immediate attention.