Which of the following are indicators that the pump is in gear?

When assessing whether a pump is in gear, several indicators can provide essential information about its operational status. Each of the options presents a valid sign that the pump is engaged and functioning correctly.

The engine sound changes are a key indicator because when a pump is engaged, the engine typically exhibits a different sound due to the additional load from the pump's operation. This audible shift can help operators quickly identify whether the pump is in gear or not.

Similarly, if the master gauge shows positive pressure, this indicates that the pump is effectively transferring fluid. A gauge reading of pressure signals that the pump is engaged and working, as it is moving water through the system.

The illumination of the white pump panel light also serves as a crucial indicator. This specific light is often designed to signal that the pump is operational and in gear. Dashboard indicators can provide critical visual confirmation, allowing operators to make informed decisions based on reliable feedback.

The option combining all these indicators reflects that each method of assessment—sound, pressure readings, and visual signals—contributes to a comprehensive understanding of the pump's operational state. Recognizing all these signs together ensures that operators can confirm the pump is in gear effectively.