Describe the basic principle of operation for a gun-type burner.

The basic principle of operation for a gun-type burner involves using high pressure to atomize oil, which is then mixed with air for combustion. This atomization process is crucial because it breaks the oil into fine droplets that increase the surface area available for burning. When the atomized oil is injected into the burner, it combines with air in the combustion chamber. The high-pressure system ensures efficient fuel delivery, leading to a more complete combustion process and improved efficiency overall.

In contrast, the other options do not accurately represent the operation of a gun-type burner. Low-pressure systems generally do not achieve the necessary atomization needed for effective combustion. Electric burners and water heating do not align with the function of a gun-type oil burner, and gravity feed systems are typically used in different types of burners where pressure isn’t a factor in the same way. Understanding the function of the gun-type burner helps highlight the importance of pressure in achieving optimal performance in oil heat systems.