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
The treatment of the fuel oils involves storage, heating, filtering and（）
A purge recovery system is used in a centrifugal air conditioning or refrigeration system to （）
（）are used to digest the sewage to produce innocuous sludge in a biological sewage treatment plant.
The main purpose of port State control is not to（）
The cetane rating of diesel fuel is an indication of the （）
The condensers located in various stages of a flash evaporator are cooled by（）
“Insufficiency of manning or insufficiency of certification of seafarers” is an identification of a（）
The Port State Control officer may witness a fire drill carried out by the crew assigned to these duties on the（）
Diesel engine air start system check valves are opened by （）
Flame failure in an automatically fired auxiliary boiler can from a/an （）