Which equipment is commonly used to prevent overheating during pump operation?

Answer: C — Radiator fan

The option of using a radiator fan is a common and effective method to prevent overheating during pump operation. This component is designed to provide adequate airflow over the engine or pump to dissipate heat generated during operation. By circulating air through the radiator, the fan helps maintain a safe operating temperature, ensuring that the pump functions efficiently and reliably. When pumps are in operation, especially under heavy loads or extended use, they can generate significant heat. The radiator fan serves to cool the coolant circulating within the system, facilitating the transfer of heat away from critical components, thus preventing overheating. Other options, such as a heat generator, pump cooler, or water tank, do not serve the primary function of actively cooling the pump during operation in the same way that a radiator fan does. While each of these items has specific purposes, they are not as directly involved in maintaining optimal operating temperatures as the radiator fan.