USPS 955 Postal Supervisor Practice Exam

Pneumatic systems are characterized by their use of compressed air or gas, which typically operates at lower pressures compared to hydraulic systems that utilize liquids, often under much higher pressures. This fundamental difference is crucial to the operation and application of each system. Pneumatic systems are generally used in applications where lighter components and faster motion are advantageous, leveraging the lighter weight of air compared to hydraulic fluids.

Hydraulic systems, on the other hand, excel in applications requiring significant force and precision but operate under higher pressure, leading to greater weight and complexity. Additionally, pneumatic systems tend to have faster response times due to the nature of air compressibility and movement, allowing for quicker actuation compared to the slower response typically associated with hydraulic systems. Recognizing these differences helps in determining the appropriate system for specific industrial applications.