What best describes the use of a pneumatic system?

A pneumatic system is best described as one that uses compressed air to transmit and control energy. This type of system typically operates on the principle of generating, controlling, and utilizing pressurized air to perform work, such as moving machinery, actuating valves, or powering tools.

Pneumatic systems are often favored in applications where speed and low maintenance are critical because they can provide rapid actions with relatively straightforward designs. The use of compressed air allows for lightweight components and versatile applications across various industries, including manufacturing and construction.

Unlike systems that rely on electricity for power, such as electric motors, or hydraulic systems that use liquids like oils or water for energy transmission, pneumatic systems specifically utilize air under pressure. Additionally, combustion systems generate power through burning fuels, which is not relevant to the functioning principles of pneumatic systems. Thus, the most accurate descriptor for a pneumatic system is its reliance on compressed air to transmit energy effectively.