As for a hydraulic single action vane pump, the inner wall of the stator is usually of （） shape.

A、circular

B、elliptical

C、rectangular

D、hexagon

查看正确答案

更多“As for a hydraulic single action vane pump, the inner wall of the stator is usually of （） shape.”相关的问题

第1题

[单选题] A reservoir, as used in hydraulic systems aboard ship, is used to store hydraulic oilAnother function is to（）

A、act as a shock absorber  B、maintain the stored oil under pressure  C、act as a base or foundation for the power unit  D、eliminate pressure surges in the system  

点击查看答案

第2题

[单选题] What is NOT a requirement of the reinspection for a tank barge with a certificate of inspection valid for two years? （）

A、The reinspection will be made between the fourteenth and sixteenth months  B、The inspector shall examine all accessible parts of the vessels's hull  C、The inspector shall examine the vessel's machinery as well as equipment  D、The scope of the reinspection shall be the same as for the inspection for certification，but in less detail  

点击查看答案

第3题

[单选题] Router R1 sits inside OSPF area 1. Router R2 redistributes an E1 route into OSPF for prefix 2.2.2.0/24, with external metric 20. Router R22 redistributes an E2 route for the same prefix/length, external metric 10. Under what conditions will R1 choose as it s best route the route through R22?（）

A、R1 will always choose the route through R22.  B、As long as R1's best internal OSPF cost to reach R22 is less than 10.  C、As long as R1's best internal OSPF cost to reach R22 is less than 20.  D、R1 will never choo se the route through R22 if the E1 route through R2 is available.  

点击查看答案

第4题

[] The master cannot sue（）freight where he signs bill of lading merely as the Shipowner’s agent.

A、A.to  B、B.for  C、C.as  D、D.on  

点击查看答案

第5题

[单选题] 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 housing

A、(1) only  B、(2) only  C、(1) and (2)  D、(1),(2)and(3)  

点击查看答案

第6题

[单选题] 组网如图示，AS100、AS200、AS300之间运行eBGP，RTC与RTA、RTC与RTB之间ATM链路相连，没有启用ATMOAM，如果RTC与RTA之间ATM链路中断，RTC上关于AS100的路由多长时间才能切换到RTC与RTB之间的ATM链路上？（）

A、20s-30s之间  B、30s-40s之间  C、60s-90s之间  D、120s-180s之间  

点击查看答案

第7题

[单选题] If you are given the job of adding hydraulic fluid to a mooring winch, and are not certain as to the type of fluid to use, you should （）.

A、add fluid that is the same color as the fluid in the reservoir  B、add turbine oil because it is always a good substitute  C、add any oil that has the same viscosity as the hydraulic fluid  D、check the winch manufacturers instruction book  