[单选题]The ______ Convention is the first to establish basic requirements on training, certification and watch-keeping for seafarers on an international level.
[单选题]Hydraulic machinery failures are commonly caused by misalignment of the system components and by ______.
[单选题]You are attempting to parallel two AC generators and the synchroscope pointer is revolving in the slow direction. This indicates that the frequency of the incoming machine is _______.
[单选题]For practical purpose ,in a simple series circuit ,the source voltage will be dropped across one resistor if it has______
[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]As the inlet ports are opened by the downward moving piston, the scavenging air enters and displaces the remaining exhaust gas in preparation for _____
[单选题]Pump up the starting air reservoir to their maximum pressure and ____ the air reservoirs and air system
[单选题]The block has spaces to accomodate _______ drive arrangement(chain or gear), a housing for the camshaft and doors allowing access to the ____.
[单选题]During the watch keeping at sea, at appropriate intervals inspection should be made of _____ , auxiliary machinery and steering gear spaces by the duty engineer.