The pumps press oil into the cross－head bearing gap when the load on the shell is at its l

Before liquid can flow into a pump, the air in the suction line must be _____ sufficiently

Before starting a diesel engine that has an engine driven lube oil pump, the engineer shou

The ______pump is usually used as the lubricating oil pump.A.turbineB.screwC.vaneejectorD.

Some of the energy fed into the pump will be dissipated as _____ due to mechanical ineffic

The Associated Press and Reuters news services came into being thanks toA．the development

What was used to power the water pump on the Joe Ross？A．Gas.B．Horses.C．Steam motor.D．Oil m