Question

If doing a pre-trip air brake inspection, which of the below would be acceptable pressure levels for the air supply valve and park control valve to pop out at?

a) 30 psi
b) 40 psi
c) 50 psi
d) 60 psi

Answer 1

The acceptable pressure for an air supply valve and park control valve to pop out during a pre-trip air brake inspection is 40 psi.

Step-by-step explanation:

During a pre-trip air brake inspection, the acceptable pressure levels for the air supply valve and park control valve to pop out are typically between 20 to 45 psi. Therefore, the correct answer from the provided options would be b) 40 psi. Valves that pop out at a pressure lower than this could indicate a system malfunction and might be unable to maintain the necessary pressure to ensure safe operation of the brakes. It's crucial for a driver to know these proper pressure levels to ensure the safety and compliance of the vehicle's braking system.