When using a pump panel, what should you verify after switching to governor mode?

• A. The discharge pressure should immediately reach maximum.
• B. The governor engagement is confirmed and RPM is controlled to meet designed discharge pressure.
• C. The engine RPM remains fixed regardless of demand.
• D. The system switches to manual mode automatically.

Answer: (B)

Governor mode means the engine speed is actively controlled to keep the pump operating at the target discharge pressure. After switching to governor mode, you should verify that the governor has engaged and that RPM is being adjusted to meet the designed discharge pressure. This confirms the system is regulating automatically rather than running at a fixed speed or at an unregulated maximum. If the discharge pressure jumps to maximum immediately, or the engine RPM stays the same regardless of demand, or the system reverts to manual, those indicate the governor isn’t functioning as intended. In practice, watch the governor engagement indicator and the RPM/pressure readings together; you should see the RPM change in response to pressure changes to hold the discharge pressure at the set point.