A .10kW
B .12.5kW
C .10.4kW
D .8kW
[单选题]泵排出压力pd=0.55MPa,吸入压力ps=-0.05MPa,流量Q=60m3/h,总效率η=80%,其轴功率为( )。A.10kWB.12.5kWC.10.4kWD.8kW
[单选题]水泵排出压力Pd=0.5MPa,吸入压力Ps=-0.05MPa,流量Q=60m3/h,总效率η=80%。其轴功率P为()。A . 10kwB . 12.5kwC . 10.41kwD . 11.46kw
[单选题]某水泵吸、排管径和压力表高度相同,工作时吸入压力为-0.05MPa,排出压力为0.55MPa,其工作扬程约为( )(设1MPa≈100m水柱高)。A.60mB.55mC.50mD.铭牌标示扬程
[单选题]某水泵吸、排管径和压力表高度相同,工作时吸入压力为-0.05MPa,排出压力为0.55MPa,其工作扬程约为()(设1MPa≈100m水柱高)。A .60mB .55mC .50mD .铭牌标示扬程
[单选题]泵压力表指数0.35Mpa,真空压力表指数-0.05Mpa,其总扬程是()Mpa。A . 0.4B . 0.35C . 0.05D . 0.3
[单选题]某水泵运行时进口压力为0.05Mpa,排出口压力为0.25Mpa,则水泵的压头为______。A.20mH2OB.25mH2OC.30mH2OD.35mH2O
[单选题]某水泵运行时进口压力为0.05MPa,排出口压力为0.25MPa,则水泵的扬程约为( )(设1MPa≈100m水柱高)。A.20mB.25mC.30mD.35m
[单选题]某水泵运行时进口压力为0.05MPa,排出口压力为0.25MPa,则水泵的扬程约为( )(设1MPa≈100m水柱高)。A.20mB.25mC.30mD.35m
[单选题]某水泵运行时进口压力为0.05MPa,排出口压力为0.25MPa,则水泵的扬程约为()(设1MPa≈100m水柱高)。A .20mB .25mC .30mD .35m
[单选题]某水泵运行时进口压力为0.05Mpa,排出口压力为0.25Mpa,则水泵的压头为()。A . 20mH2OB . 25mH2OC . 30mH2OD . 35mH2O