What is the main advantage of a pneumatic system?

• A. It costs less to operate
• B. It is cleaner because only air is circulated
• C. It runs at higher power
• D. It makes more noise

Answer: (B)

Pneumatic systems use compressed air as the working fluid, so they keep the process clean because only air is circulated through the lines. There’s no hydraulic oil or lubricants flowing around, which greatly reduces the risk of fluid leaks contaminating parts, products, or the environment. That cleanliness simplifies maintenance and makes pneumatics a good choice in many automation and assembly applications where contamination must be avoided.

While some setups may be inexpensive or simple, operating costs aren’t guaranteed to be lower in every case, and pneumatic systems don’t inherently deliver higher power than other types. Noise is common due to exhaust and rapid actuation, which is a drawback rather than an advantage.