What must happen for a properly operating balance system nozzle to dispense fuel?

• A. Vapor processor is operational
• B. Nozzle vapor valve is closed
• C. Nozzle boot (bellow) is compressed
• D. Faceplate creates a continuous seal

Answer: (C)

For a balance system nozzle to effectively dispense fuel, the nozzle boot or bellows must be compressed. This compression occurs when the nozzle is inserted into the vehicle's fill pipe. The action of compressing the boot creates a tight seal, which is essential for the system to balance the vapor recovery and fuel dispensing processes.

When the boot is properly compressed, it allows fuel to flow from the nozzle into the vehicle while simultaneously capturing the displaced vapors through the vapor recovery system. This balance is crucial for preventing vapor loss into the atmosphere and ensuring safety and compliance with environmental regulations.

The other options each serve important functions in the overall operation of the system, but for fuel dispensing to begin, the compression of the nozzle boot is the key action that facilitates both the flow of liquid fuel and the management of vapors simultaneously.