In a multiple compressor system with a very light and steady load, ____________.

In a multiple compressor system designed to handle varying loads, when the demand is very light and steady, it is most efficient for only one compressor to be in operation. This approach maximizes energy efficiency because cycling multiple compressors simultaneously can lead to increased wear and tear, energy consumption, and can complicate system controls.

By running just one compressor, the system can effectively meet the low, steady demand without the inefficiencies associated with running multiple units. This also helps maintain optimal performance of the compressor being utilized, as it can operate within its best efficiency range without the additional complexity of managing several compressors at near idle conditions. In situations where the load remains light, there is no need for the capacity that additional compressors would provide, thus maintaining a single unit suffices for the demand needs.