With respect to centrifugal pump impellers, which of the following descriptions represents the correct centrifugal pump classification? ()
A、Single stage or multistage
B、High pressure or low pressure
C、Open or close coupled
D、Horizontal or vertical
A、Single stage or multistage
B、High pressure or low pressure
C、Open or close coupled
D、Horizontal or vertical
A、Call sign and IMO number B、Course over ground and MMSI C、MMSI number and call sign D、Route Plan and navigational status
A、they all have different limitations with respect to coverage B、they all have different limitations in the technology they use C、different systems apply to different ships D、all of above
A、they all have different limitations with respect to coverage B、they all have different limitations in the technology they use C、different systems apply to different ships D、all of above
A、ignition quality of the fuel B、high heating value of the fuel C、amount of carbon residue after combustion D、internal flow resistance in the injectors
A、the master B、the chief engineer C、the officer on duty D、the engineer in charge of watch
A、allow filtration of less viscous oil B、decrease the pressure drop across the filter C、improve overall filtration D、all of the above