What is a characteristic of pneumatic pumps related to their operating environment?

Pneumatic pumps are designed to utilize compressed air to create suction and move fluids. One of the key characteristics of these pumps is their ability to function effectively in moist conditions without being negatively impacted by the presence of water. This allows pneumatic pumps to be employed in various applications where the operating environment might be damp or humid.

Choosing the option that states pneumatic pumps must be used in dry environments does not align with their operational capabilities. In fact, pneumatic pumps can operate with liquids and gases that are not purely dry and can handle some moisture without detrimental effects. This versatility makes them suitable for a range of settings, including those where moisture is present. Understanding this characteristic helps in determining the appropriate applications for pneumatic pumps in various wastewater scenarios and other industrial processes.