How many dump valves do the Xcelsior and New Flyer buses have?

The correct answer is that Xcelsior and New Flyer buses typically have three dump valves. These valves play a crucial role in the air suspension system of the buses. They allow for the release of air from the suspension system, which is important for adjusting the ride height and for easier access when boarding and alighting.

Having three dump valves provides a more efficient and controlled release of air, ensuring that the bus can lower itself properly for passengers, particularly those who may have difficulty accessing higher platforms. This feature enhances safety and accessibility, making it an essential component of the bus's design.

The number of dump valves is significant because each valve serves a specific function within the air suspension system, contributing to the overall performance and comfort of the ride. Understanding the role of these dump valves is important for bus operators in managing the vehicle's operations effectively.