A.stuffing boxes eliminate the leakage problems usually associated with other gear pumps
B.it is not necessary to closely maintain design clearances with this pump
C.they are essentially self-priming and produce a high suction lift
D.these pumps are designed with extreme tooth angled
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A.seal water supply be cut off
B.make-up water supply be cut off
C.oil outlet valve closed or not open sufficiently
D.the flow rate of oil is too much
A.2
B.4
C.5
D.6
A.activate the driers
B.change color
C.secure the compressor
D.add a predetermined amount of liquid drier
A.stopping the main engine suddenly
B.changing the main engine running direction suddenly
C.the sailing from the shallow water area to the deep water area
D.the ship’s trim too much
A.over heat
B.over speed
C.over pressure
D.over worn
最新試題
The main purpose of port State control is not to（）
“Insufficiency of manning or insufficiency of certification of seafarers” is an identification of a（）
Which of the listed governor characteristics will greatly affect the load sharing relationship between paralleled diesel generators?（）
Refrigerant entering the compressor of a refrigeration system should be in which of the following conditions?（）
Engine parameters shall be corresponded to NOx Technical Files. This is required by （）
The cetane rating of diesel fuel is an indication of the （）
To shut down a diesel engine after it exceeds the set maximum speed，which type of device listed should be used?（）
The shipboard oil pollution emergency plan will be invalid after （）
During the diesel engine running, the water level of F.W expansion tank should normally kept in the （） level of glass tube.
As soon as a diesel engine has started, which of the listed engine operating parameters should be checked FIRST?（）