It is possible to mount a double suction centrifugal pump impeller with the vanes facing in the wrong directionThis would cause the pump （）.
- Ahead capacity to improve
- Bdischarge to be reversed
- Cefficiency to decrease
- Dslippage to decrease
问题
It is possible to mount a double sucti
参考解析：
分类：船舶辅助机械题库
相关推荐
-
1、It is possible，and sometimes necessary
It is possible，and sometimes necessary，to strengthen the deck of a vessel for carriage of deck cargo by（）.Aplacing bunker on the deckBbuildin...
-
2、It is essential for（）to give a complet
It is essential for（）to give a complete description of damage and shortage in the discharging report.Athe office staffBthe terminal staffCthe ship's crewDthe insurance company
-
3、It is easier to replace a dry cylinder
It is easier to replace a dry cylinder liner than a wet one because（）Aof the thin wall thicknessBhoning makes it easier to maintain the des...
-
4、It is illegal for a public official to
It is illegal for a public official to ask people for gifts or money ______favors to them.A in preference toB in place ofC in agreement withD in exchange for
-
5、It is possible for ships to receive sa
It is possible for ships to receive safety message transmitted by Navtex station（）.Ain any INMARSAT regionsBin each NAVTEX areaCat any distanceDin Areas A3 and A4
-
6、When it is necessary to open a refrige
When it is necessary to open a refrigeration system for repairs and the system will be open for more than a few minutes, the open ends of the system should be （）.AdehydratedBpurgedCpluggedDevacuated