If a hydraulic pump on a winch accidentally stops while hoisting,the load will stay suspended because（）.
1、As for a hydraulic vane pump, which o
As for a hydraulic vane pump, which of the following is in contact with the vanes during working: （）(1)the rotor(2)the pump shaft(3)the external surface of the housingA(1) onlyB(2) onlyC(1) and (2)D(1),(2)and(3)
2、After installing a new hydraulic pump
After installing a new hydraulic pump in a system, what special attention should be given to the hydraulic system?（）AThe relief valves in the...
3、If a radial piston hydraulic pump fail
If a radial piston hydraulic pump fails to deliver rated fluid volume, the cause can be （）.Acontaminated fluidBpitted thrust ringsCworn pintle bearingsDobstructed suctions passage
4、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
5、When a hydraulic vane pump is working
When a hydraulic vane pump is working, which of the following is in contact with the vanes?（）(1) the rotor(2) the internal surface of the housing(3) the external surface of the housingA(1) onlyB(2) onlyC(1) and (2)D(1), (2) and (3)
6、If a hydraulic governor has been refil
If a hydraulic governor has been refilled with oil, the engine should be operated until it reaches normal temperaturethen the air should be pu...