Which valve takes water from the discharge side of the pump to decrease the temperature of the cooling water in the apparatus engine during pumping operations?

• A. Tank Fill/Recirculating Valve
• B. Engine Cooler Valve
• C. Tank To Pump Valve
• D. Intake/Compound Gauge

Answer: (B)

The main idea is to keep the engine from overheating by using some of the pump’s discharge water to cool it. The valve that does this is the engine cooler valve. It diverts water from the pump’s discharge into the engine’s cooling circuit, where the water picks up heat from the engine and then returns cooler to continue circulating. This helps maintain safe engine temperatures during heavy pumping operations.

Other valves have different jobs—one handles filling or recirculating water in the tank, another routes water from the tank to the pump, and a gauge measures intake pressure. They don’t control the engine cooling loop, so they’re not used for cooling the engine.