Massachusetts Oil Burner License Practice Test

What is the impact of increasing the fuel pump pressure?

1. Decrease the fuel temperature

2. Lower the oil viscosity

3. Increase the flow rate

4. Reduce noise levels

The correct answer is: Increase the flow rate

Increasing the fuel pump pressure directly correlates with the ability of the system to deliver fuel more effectively. Higher pressure pushes the fuel through the system more forcefully, which results in an increased flow rate to the burner. This is crucial because an adequate flow rate is necessary for efficient combustion; without it, the burner may not operate properly. Increased flow can enhance the mixing of the fuel with air, leading to better efficiency and more stable flame characteristics. The other options do not have a direct relationship with the pressure increase. For instance, increasing pump pressure does not inherently decrease fuel temperature, nor does it lower oil viscosity, as both properties are influenced by different factors such as temperature and fuel composition. Additionally, although some users might perceive a change in noise levels due to operating conditions, higher pressure does not necessarily reduce noise, as it could lead to increased turbulence and sound in the system depending on design specifics.