The gauge and flow meter test compares flow meter readings with what?

Answer: B — Tank-to-pump flow rate

The gauge and flow meter test is crucial for assessing the efficiency and capability of a water pumping system. In this test, flow meter readings are specifically compared with the tank-to-pump flow rate to determine how effectively the system is performing. By utilizing the tank-to-pump flow rate as a benchmark, operators can identify discrepancies or issues in the flow meter's performance. This comparison helps ensure that the water supply system is delivering the expected flow, which is vital for operations such as firefighting, irrigation, or any other applications requiring reliable water delivery. Other options present valuable but unrelated measures: static water pressure is a measurement of water pressure in a system that does not flow; atmospheric pressure references the weight of the air above us and is not relevant for flow meter assessments; and stating that no comparison is done contradicts the purpose of the test, which is fundamentally about verifying flow meter accuracy against the established rate.