What powers pneumatic equipment?

Pneumatic equipment is powered by compressed air, making air the correct answer. This type of equipment utilizes the pressure of air to generate mechanical motion. Pneumatics is widely used for applications such as powering tools, actuators, and various machinery in manufacturing and construction, leveraging the compressibility of air to create force.

Electricity powers electrical equipment, hydraulic fluid is associated with hydraulic systems that utilize liquids under pressure for force, and water can be used in certain mechanical systems but does not specifically refer to the operation of pneumatic tools. Understanding the distinction between these power sources helps clarify the principles behind various types of machinery and their operational requirements.