A.explosimeter
B.oxygen indicator
C.fresh air indicator
D.all of the above
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A.concentrations of explosive gas
B.an oxygen deficiency in a space
C.the presence of harmful amounts of carbon monoxide
D.All of the above
A.sludge
B.oily ballast water
C.bilge slops
D.All of the above
A.fuel oil only
B.crude oil only
C.liquefied petroleum gas
D.petroleum oil of any kind
A.Engine room ventilation should be started
B.Main engines should be secured
C.The fire pump should be started
D.The fixed CO2 system should be activated
A.proceed to their man overboard stations
B.start the fire pump
C.put on lifejackets and go to their abandon ship stations
D.secure the propulsion diesel engines and evacuate the engine room
（）connectors hold best if a wire is accidentally pulled or a connection becomes loose.
“Insufficiency of manning or insufficiency of certification of seafarers” is an identification of a（）
Cold weather starting of a diesel engine may be made easier by（）
The shipboard oil pollution emergency plan will be invalid after （）
As soon as a diesel engine has started, which of the listed engine operating parameters should be checked FIRST?（）
Diesel engine air start system check valves are opened by （）
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 （）
Thermostatic steam pressure reducing valves are used in the fuel oil service system to control the（）
（）are used to digest the sewage to produce innocuous sludge in a biological sewage treatment plant.