What is the primary function of a fuel strainer in an aircraft fuel system?

The primary function of a fuel strainer in an aircraft fuel system is to prevent clogging in the engine. The fuel strainer acts as a filtration device that removes impurities and contaminants present in the fuel before it reaches the engine. These impurities can include dirt, rust, and water, which, if not filtered out, could clog fuel lines, injectors, or carburetors, leading to engine performance issues or failure. By ensuring that clean fuel is supplied to the engine, the strainer plays a crucial role in maintaining the efficiency and safety of the aircraft.

While other options address aspects related to fuel management, they do not accurately describe the fundamental purpose of a fuel strainer. Increasing fuel flow relates to fuel pump functions, enhancing combustion is linked to the fuel-air mixture, and regulating fuel temperature pertains to different components, such as fuel coolers or pre-heaters. Hence, these alternatives do not capture the essential duty of the fuel strainer in the aircraft fuel system.