InspectionPregunta 30 de 60
At what pressure should the spring brakes come on automatically during the continued-air-loss test?
a.Below 90 psi
b.Below 75 psi
c.Below 100 psi
d.In the range of about 20 to 45 psi
Explicación
Continuing to fan off the air, the spring brakes should come on automatically when tank pressure falls to the manufacturer's specified level, usually in the range of about 20 to 45 psi. On a tractor-trailer, you may hear the parking brake valve pop out. This confirms the automatic emergency braking works.
Practica las 60 preguntas gratis — sin registro.
Preguntas relacionadas de este tema
- When checking the air compressor during inspection, what should you look at if it is belt-driven?
- What is the correct way to begin the air brake check for build-up rate in a dual air system?
- How do you test the low-pressure warning signal?
- How do you perform the static leakage (applied pressure) test on a straight truck with air brakes?
- For a single vehicle (straight truck), what is the maximum allowable air pressure loss in one minute with the brakes applied?
- With the engine off and brakes released, what is the maximum allowable air leakage per minute for a straight truck?
Última revisión: · proceso editorial
Equipo Editorial de PrepPass · Verificado con CDL Air Brakes Knowledge Test · Cómo revisamos