The terms hollow, semi-solid refer to what component of an oil burner?

The terms hollow, semi-solid refer to what component of an oil burner?

• A. nozzle
• B. electrode
• C. burner head
• D. valve

Answer: (A)

The spray pattern of the fuel is what those terms describe, and that pattern comes from the nozzle. In an oil burner, the nozzle atomizes the fuel and sends it out in a specific shape. Hollow refers to a hollow-cone spray where fuel is sprayed around the outside in a ring and a central void remains, while semi-solid describes a denser spray pattern that’s not a full, solid cone. The way the fuel breaks into droplets and mixes with air depends on this pattern, which in turn affects flame shape, combustion efficiency, and emissions. The ignition electrode, burner head, and valve do other jobs (ignition, air/fuel mixing, and flow control) and aren’t described by hollow or semi-solid. So the component that these terms describe is the nozzle.

The spray pattern of the fuel is what those terms describe, and that pattern comes from the nozzle. In an oil burner, the nozzle atomizes the fuel and sends it out in a specific shape. Hollow refers to a hollow-cone spray where fuel is sprayed around the outside in a ring and a central void remains, while semi-solid describes a denser spray pattern that’s not a full, solid cone. The way the fuel breaks into droplets and mixes with air depends on this pattern, which in turn affects flame shape, combustion efficiency, and emissions. The ignition electrode, burner head, and valve do other jobs (ignition, air/fuel mixing, and flow control) and aren’t described by hollow or semi-solid. So the component that these terms describe is the nozzle.