In which mode should apparatus equipped with pressure governors be set when acting as the attack pumper?

When an apparatus equipped with pressure governors is acting as the attack pumper, it should be set to pressure mode. This setting is designed to maintain a constant discharge pressure, which is crucial for delivering a steady and reliable water supply to the firefighting operations.

In pressure mode, the pressure governor actively adjusts the throttle to ensure that the pressure on the discharge side of the pump remains stable, even as demand changes. This is especially important during fire attack operations, where fluctuations in flow due to changes in hose lines or nozzle openings can occur. By keeping the pressure consistent, firefighters can ensure that they are effectively combating the fire without the risk of sudden bursts of high pressure or drops in pressure that could compromise their safety or the effectiveness of their operations.

The other modes, such as RPM mode, are not as suitable for the attack pumper role because they primarily focus on maintaining engine speed rather than the necessary pressure for effective water delivery. Thus, operating in pressure mode allows for greater control and efficiency in firefighting scenarios.