Which fire hose has the purpose of delivering water from a source to an attack engine?

The correct answer is supply hose or line, as its primary function is to transport water from a water source—such as a hydrant or a static water source—to an attack engine or pumper. This type of hose is typically larger in diameter and designed to handle higher volumes of water, which is crucial for ensuring that sufficient water is available for firefighting operations.

Supply hoses are essential for establishing a reliable water supply, allowing firefighters to effectively combat fires by delivering the necessary water volume to the fire scene. They are built to withstand different pressures and conditions, making them suitable for this critical task.

The other types of hoses mentioned serve different purposes. Attack hose or line is specifically designed for delivering water directly to the fire from the attack engine during firefighting operations, focusing on maneuverability and ease of handling at the fire scene. Rubber jacketed and double jacketed hoses have protective layers for enhanced durability, but they are not specifically categorized under the primary function of delivering water from a source to an attack engine like supply hoses are.