FAA Powerplant Written Practice Test

What type of fuel control is commonly used in modern turbine engines?

1. Hydro mechanical or electrical

2. Simple mechanical control

3. Manually operated control

4. Fluidic control

The correct answer is: Hydro mechanical or electrical

Modern turbine engines typically utilize hydro mechanical or electrical fuel control systems. These systems are designed to precisely regulate the flow of fuel to the engine based on various parameters such as engine speed, temperature, and throttle position, allowing for optimal performance and efficiency. Hydro mechanical controls use a combination of hydraulic pressure and mechanical linkages to manage fuel flow, while electrical controls leverage electronic sensors and actuators for more precise and responsive adjustments. The use of these advanced control systems enables better fuel efficiency, reduced emissions, and improved engine performance compared to older technologies. In contrast, the other types of controls mentioned, such as simple mechanical or manually operated controls, lack the precision and responsiveness required in modern aviation applications. Fluidic controls, which utilize fluid dynamics principles, are less common in this context compared to hydro mechanical and electrical systems, making them less applicable for controlling fuel in contemporary turbine engines.