A multi-stage centrifugal pump will contain more than one?

A multi-stage centrifugal pump indeed contains more than one impeller. This design allows the pump to produce a higher discharge pressure compared to single-stage pumps. Each impeller boosts the pressure of the liquid as it passes through, effectively combining the effects of multiple stages, hence enhancing the overall performance and efficiency of the pump.

The use of multiple impellers allows for a gradual increase in pressure across each stage, which is beneficial for applications requiring high-pressure outputs. This design is particularly common in applications such as water supply, irrigation systems, and different industrial processes where pressure gain is crucial.

The other options, while relevant to pump operation, do not accurately describe the components found in a multi-stage centrifugal pump. Valves and chambers may be present in the overall system but are not specific to the multi-stage design itself, whereas motors typically serve as the power source for the pump but are not multiplied within a multi-stage pump configuration.