A.the fuel oil
B.the lubricating oil
C.the refrigerating oil
D.the hydraulic oil
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A.one salt water, one fresh water
B.one salt water, one fuel
C.one fresh water, one fuel
D.one steam, one fuel
A.main engines
B.main boilers
C.pipes and fittings
D.A and B
A.steam trap
B.check valve
C.separator
D.strainer
A.a check valve
B.a gate valve
C.a pressure reducing valve
D.a quick closing valve
A.at most references
B.at least references
C.maximum standards
D.minimum standards
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.
A purge recovery system is used in a centrifugal air conditioning or refrigeration system to （）
Refrigerant entering the compressor of a refrigeration system should be in which of the following conditions?（）
To shut down a diesel engine after it exceeds the set maximum speed，which type of device listed should be used?（）
If two A.C.generators are to be operated in parallel, the load is distributed evenly by（）
Diesel engine air start system check valves are opened by （）
Which of the diesel engine components listed increase air density and helps to improve engine operating efficiency?（）
Thermostatic steam pressure reducing valves are used in the fuel oil service system to control the（）
The Port State Control officer may witness a fire drill carried out by the crew assigned to these duties on the（）
The cetane rating of diesel fuel is an indication of the （）