System PartsPregunta 23 de 60
How are the service brakes applied in an air brake vehicle?
a.By pressing the brake pedal, which sends air to the brake chambers
b.By pulling the yellow parking brake knob
c.By turning off the engine
d.By draining the air tanks
Explicación
The service brakes are the normal driving brakes and are applied by pressing the brake pedal. Pressing the pedal sends air to the brake chambers, which move the pushrods and apply the brakes. Releasing the pedal lets the air out and releases the brakes.
Practica las 60 preguntas gratis — sin registro.
Preguntas relacionadas de este tema
- What is the trailer hand valve (trolley valve) used for?
- Why should the trailer hand valve NOT be used for parking?
- What is a one-way check valve used for in an air brake system?
- On many air brake vehicles, what is the purpose of the safety relief valve on the first air tank?
- Some air brake systems use an alcohol evaporator. What is its purpose?
- What is the main advantage of air brakes over hydraulic brakes on large vehicles?
Última revisión: · proceso editorial
Equipo Editorial de PrepPass · Verificado con CDL Air Brakes Knowledge Test · Cómo revisamos