A.low-velocity fog
B.high-velocity fog
C.a straight stream of water
D.foam spray
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A.can not be ignited by a spark unless the vapor is in a confined space
B.are nontoxic in all concentrations
C.can not be ignited by a spark unless they are at their auto-ignition temperature
D.are heavier than air
A.fuel
B.oxygen
C.heat
D.electricity
A.odorless
B.explosive
C.nontoxic
D.visible
A.Pump only if the discharge is led to a shore tank or barge
B.Pump only during the hours of darkness
C.Pump only on the outgoing tide
D.Pump only as much as is necessary
A.sufficient oxygen to sustain human life
B.an explosive mixture in the compartment
C.a toxic atmosphere in the compartment
D.All of the above
最新試題
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.
Diesel engine air start system check valves are opened by （）
（）are used to digest the sewage to produce innocuous sludge in a biological sewage treatment plant.
Which of the listed governor characteristics will greatly affect the load sharing relationship between paralleled diesel generators?（）
To shut down a diesel engine after it exceeds the set maximum speed，which type of device listed should be used?（）
During the diesel engine running, the water level of F.W expansion tank should normally kept in the （） level of glass tube.
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
The condensers located in various stages of a flash evaporator are cooled by（）
The shipboard oil pollution emergency plan will be invalid after （）
Cold weather starting of a diesel engine may be made easier by（）