A.control equipment
B.power unit
C.transmission mechanisms
D.fittings and pipeline
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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
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
最新試題
During the diesel engine running, the water level of F.W expansion tank should normally kept in the （） level of glass tube.
Engine parameters shall be corresponded to NOx Technical Files. This is required by （）
Which of the diesel engine components listed increase air density and helps to improve engine operating efficiency?（）
Using a file without a handle may result in （）
Which of the following items don’t belong to dock repair works?（）
Flame failure in an automatically fired auxiliary boiler can from a/an （）
One of the reasons that cause oil flowed from sludge outlet of a self-cleaning separator is（）
Cold weather starting of a diesel engine may be made easier by（）
The cetane rating of diesel fuel is an indication of the （）
Refrigerant entering the compressor of a refrigeration system should be in which of the following conditions?（）