[单选题]Which of the following problems will occur if a disk-type centrifugal lube oil purifier is not properly primed prior to admitting oil flow to the bowl ?
[单选题]If the bowl of disk type centrifugal purifier when operate as a separator is not primed, the__________.
[单选题]After arrived at the port, if it is necessary to lift the piston out and inspect the M/E temporarily, the chief engineer should report the situation to the ____, and the operation could be performed only after having the approvement of relevant department、
[单选题]Personnel who are moving or handling material aboard ship should NOT follow which of the listed practices?
[单选题]What should be done if localized scoring察痕. is discovered in a pump shaft sleeve during routine maintenance inspection?
[单选题]The Master should call___ for permission to use chemical agents in response to oil pollution into the se
[单选题]According to MARINE LABOUR CONVERTION 2006, the employment, engagement at work of seafarers under the age of 18 shall be prohibited where the work _____