How does a pneumatic system differ from a hydraulic system?

The distinction between pneumatic and hydraulic systems lies in the mediums they utilize for transmitting power. Pneumatic systems operate on compressed air or gas, which is utilized to create motion or perform work. In contrast, hydraulic systems rely on liquid fluids, typically oils, to transmit power. This fundamental difference affects the operation, efficiency, and application of both systems.

Pneumatic systems are usually preferred for applications that require rapid motion and lower force, such as in automation and light assembly tasks, whereas hydraulic systems are chosen for heavy-duty applications where higher force and precision are crucial, such as in construction equipment and heavy machinery.

Understanding this key difference highlights why the correct answer emphasizes the use of compressed air in pneumatic systems and liquid fluid in hydraulic systems, reflecting the essential characteristics that dictate their design and functionality in various applications.