A、The wearing rings are excessively worn
B、The suction strainer is clogged
C、The discharge valve is clogged
D、The shaft is worn
更多“If an operating bilge pump is developing good vacuum, but is unable to discharge any water, which of the following problems is the most probable cause?（）”相关的问题
A、motor overload would open B、relief valve would open C、pump would eventually overheat D、motor would overheat
A、If the file exists it will be opened for editing. If the file does not exist an error message will be displayed. B、If the file exists it will be opened for editing. If the file does not exist a new file with the name file.out will be created and opened for editing. C、If the file exists an error message will be displayed. If the file does not exist a new file with the name file.out will be created and opened for editing. D、If the file exists the operator will be asked whether to open the file or overwrite the file. If the file does not exist a new file with the name file.out will be created and opened for editing.
A、failure of the proper operation of emergency generator B、insulation of piping including exhaust pipes in engine room contaminated by oil C、improper operation of bilge of bilge of bilge pumping arrangements D、damaged sanitary pump
A、A.bilge well connected to that valve, plus the second bilge well being pumped will be completely emptied B、B.bilge system will lose vacuum and prevent the other bilges from being pumped out C、C.bilge well aft connected to that valve will siphon its contents to the forward bilge wells D、D.discharge pressure will be too high
A、excess amount of oily-water mixtures in bilges B、insulation of piping including exhaust pipes in engine room contaminated by oil C、improper operation of bilge pumping arrangements D、there were an actual emergency
A、A.excessive water in the bilges B、B.a clogged suction strainer C、C.oil in the bilges D、D.All of the above
A、to inject cleaning additives when the bilges are extremely dirty B、when the main condenser becomes fouled, in order to provide additional cooling water circulation C、to connect the rose box to the independent bilge suction D、if the bilges become flooded and they can not be emptied by any other means
A、Send the wiper into the well with only a scoop and pail B、Remove the bilge manifold valve and attempt to back flush the line C、Simultaneously operate all available bilge pumps D、It is only necessary to transfer half the contents of a drum of degreaser into the bilge well
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