A.stop valves
B.pressure relief valves
C.balance valves
D.regulating speed valves
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A.steam plants, electric motors and compressed air
B.diesel engine, hydraulic machinery and compressed air
C.steam plants, electric motors and hydraulic machinery
D.diesel engines, steam plants and hydraulic machinery
A.crane
B.hatch cover
C.windlass
D.steering gear
A.possible
B.necessary
C.practicable
D.impracticable
A.erosion
B.corrosion
C.pitting
D.dezincification
A.erosion
B.corrosion
C.cavity
D.scouring
最新試題
Which of the diesel engine components listed increase air density and helps to improve engine operating efficiency?（）
Which of the listed governor characteristics will greatly affect the load sharing relationship between paralleled diesel generators?（）
（）are used to digest the sewage to produce innocuous sludge in a biological sewage treatment plant.
The flash point of a residual fuel oil should be used to determine the highest temperature to which oil may be heated（）
If two A.C.generators are to be operated in parallel, the load is distributed evenly by（）
The cetane rating of diesel fuel is an indication of the （）
The treatment of the fuel oils involves storage, heating, filtering and（）
To shut down a diesel engine after it exceeds the set maximum speed，which type of device listed should be used?（）
When does auxiliary burner of incinerator put into operation? （）Ⅰ. start incinerator when it is coldⅡ. the sludge for dealing with is littleⅢ. the sludge for dealing with is largeⅣ. the water and impurity in sludge are too muchⅤ. the temperature in incinerator is lowⅥ. dealing with little solid rubbish
A purge recovery system is used in a centrifugal air conditioning or refrigeration system to （）