A.stop valves
B.non-return valves
C.quick closing valves
D.relief valves
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A.a pressure reducing valve
B.a pilot valve
C.an operating piston
D.downstream pressure
A.adjusting a nut
B.a pre-tensioned spring
C.any spring
D.upstream pressure
A.aeration tanks
B.settling tanks
C.disinfection agent
D.anaerobic bacteria
A.accidents
B.special valve chests
C.interchangeable blanks
D.connecting passages
A.a test valve
B.an inspection valve
C.a stop valve
D.a non-return valve
最新試題
Engine parameters shall be corresponded to NOx Technical Files. This is required by （）
Under MARPOL Code the ship to which it applies has to carry （）
For a given exhaust gas boiler, what is the quantity of its evaporation mainly determined?（）
Which of the listed governor characteristics will greatly affect the load sharing relationship between paralleled diesel generators?（）
A purge recovery system is used in a centrifugal air conditioning or refrigeration system to （）
（） is not installed on the main switchboar.
To shut down a diesel engine after it exceeds the set maximum speed，which type of device listed should be used?（）
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The cetane rating of diesel fuel is an indication of the （）
The additional mark （）in the Classification Certificate for Machinery means propulsion apparatus is remotely controlled on the navigating bridge control station, and engine assembly control station is unmanned periodically.