Answer :
Final answer:
The low air warning devices activate at 60 psi in the basic air brake system. The low air warning devices in the basic air brake system must activate at 60 psi, as mandated by federal regulations, to ensure safety and compliance. option (a) is correct answer.
Explanation:
The low air warning devices activate at 60 psi in the basic air brake system. This is crucial for ensuring the safety of the braking system in vehicles. The low air warning devices in the basic air brake system must activate at 60 psi, as mandated by federal regulations, to ensure safety and compliance.
The question asks: At what psi must the low air warning devices activate in the basic air brake system? The correct answer is A. 60 psi. Federal regulations mandate that the low air warning devices in a basic air brake system must activate when the pressure in the system falls to 60 psi or lower.
This safety feature ensures that the driver is warned in time to take necessary action before the air pressure drops to a critically low level, potentially resulting in brake failure. It's important for safety and compliance that all vehicles equipped with air brakes meet this standard.
