What is the purpose of monitoring suction and discharge pressures during pump operations?

• A. To monitor engine temperature.
• B. To measure the water's purity.
• C. To keep the pump operating within safe parameters and ensure adequate pressure at the discharge.
• D. To determine ladder extension length.

Answer: (C)

Monitoring suction and discharge pressures tells you how the pump is performing and whether you’re delivering the right amount of pressure where it’s needed. Suction pressure shows what the pump is drawing from the source; if it’s too low, you risk losing prime or pulling air, which reduces flow and can damage the pump. Discharge pressure shows the pressure you’re putting onto the hose and nozzles; if it’s too high, you can over-stress hose, fittings, and the nozzle, and if it’s too low, you won’t reach the required flow at the target. By watching both gauges, you can keep the pump within its safe operating range and adjust throttle, valves, or hose layout to ensure the discharge has adequate pressure for the incident. The other options don’t relate to pump performance or the need to maintain proper pressure at the discharge.