Texas Commission on Environmental Quality (TCEQ). Class C Water License Exam

Which type of pump is most commonly used in the distribution system?

1. Diaphragm pump

2. Peristaltic pump

3. Centrifugal pump

4. Screw pump

The correct answer is: Centrifugal pump

The most commonly used pump in the distribution system is the centrifugal pump. This type of pump operates by converting rotational energy, typically from an electric motor or engine, into energy in a moving fluid. The design of centrifugal pumps allows them to efficiently transfer large volumes of water, making them ideal for water distribution systems where maintaining pressure and flow rates is critical. Centrifugal pumps are favored in many applications due to their simple design, ability to handle clean or slightly contaminated fluids, and straightforward maintenance requirements. They can also be easily scaled for various size requirements in municipal systems. The efficiency of these pumps at moving liquids over long distances and their ability to provide consistent flowrate under a variety of pressures make them fundamentally important to water distribution systems, particularly in urban areas. In contrast, diaphragm pumps and peristaltic pumps have more specialized applications, often used in scenarios where the fluid needs to be isolated from the mechanical components of the pump or where precise flow control is essential. Screw pumps can handle high-viscosity fluids and may not be as effective in applications where large volumes of water need to be moved efficiently.