What is the result of increasing the fuel pump pressure?

Increasing the fuel pump pressure has a direct impact on the flow rate and atomization of the fuel. When the pressure is raised, more fuel is delivered to the burner, which in turn increases the flow rate. Higher fuel pump pressure also enhances the atomization of the fuel as it is forced through the nozzle, resulting in finer fuel droplets. Effective atomization is crucial for achieving better combustion, which ultimately leads to improved efficiency and performance of the heating system.

This relationship underscores the importance of proper fuel pump operation in maintaining optimal burner performance. While other aspects such as oil viscosity and air circulation may influence system efficiency, they are not directly affected by changes in fuel pump pressure in the same way that flow rate and atomization are, making this answer the most accurate in the context of burner operation and efficiency.