Which part of the duplex nozzle fuel system divides flow into primary and secondary manifolds?

• A. The fuel pressurizing valve
• B. The dump valve
• C. The return line
• D. The fuel filter element

Answer: (A)

The main concept is how fuel flow is split between the two spray paths in a duplex nozzle. The fuel pressurizing valve is responsible for establishing and regulating the supply pressure that feeds both primary and secondary manifolds. By adjusting this valve, the system can control how much fuel goes to each manifold, effectively dividing the flow to meet spray and combustion needs. The other components don’t perform this distribution: the dump valve is used to purge or vent fuel, the return line simply brings excess fuel back to the tank, and the filter element cleans fuel but doesn’t split it.