Increasing the speed of a rotary pump

1、If the speed of a turbocharged diesel

If the speed of a turbocharged diesel engine is maintained constant the turbocharger speed will （）Adecrease until the engine speed increasesBincrease as the load increasesCdecrease as the loadDincreases remain unchanged

2、The advantage of a centrifugal pump as

The advantage of a centrifugal pump as compared with a reciprocating pump is that （）.Adischarge is continuousBit has no internal valvesCupon accidental closing of discharge valve, excessive pressure will not build upDall of the above are true

3、Under rotary pumps are the gear, （）, c

Under rotary pumps are the gear, （）, cam-and-piston and screw types.AreciprocatingBdiffuserCturbineDvane

4、The capacity of a centrifugal pump can

The capacity of a centrifugal pump can be increased by the installation of a larger diameter impeller Another means of increasing the pump cap...

5、If the capacity of a centrifugal pump

If the capacity of a centrifugal pump decreases gradually over a long period of time, you should replace the （）.Apacking glandBmechanical sealsClantern ringsDwearing ring

6、The function of a centrifugal pump dou

The function of a centrifugal pump double volute casing is to （）.Areduce radial thrust to the impellerBdouble the liquid velocity through the pump when compared to a single voluteCreduce hydraulic end thrustDprovide the effect of multi-staging