Which characteristic is typical of a pneumatic control system?

A pneumatic control system is characterized by its use of air pressure for operation. In such systems, compressed air is utilized to transmit and control energy, enabling the automation of various processes. This approach allows for effective force and motion control in applications like valves, actuators, and other equipment.

The utilization of air pressure leads to several advantages, such as the ability to operate in environments where electrical components may be hazardous due to the risk of sparks or explosions. Pneumatic systems are also relatively simple to maintain, and they can provide rapid response times for control applications.

Other options do not accurately represent the fundamental operation of a pneumatic control system. For instance, while mechanical levers can be part of a control system, they are not distinctive of pneumatic systems specifically. Operating solely on electric signals describes an electric control system, which is fundamentally different from pneumatic systems. Similarly, requiring constant manual adjustment is not typical of pneumatic control systems, which are generally designed to automate processes and minimize the need for continuous manual intervention.