单项选择题
In order for combustion to occur inside a piping system such as a vapor collection header in a marine emmission control system，there must be（）.
A.fuel
B.oxygen
C.ignition
D.All of the above
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相关考题
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单项选择题
If the survival craft is not loaded to full capacity，the personnel should be（）.
A.loaded more on the port side forward
B.loaded equally on both sides with more forward
C.loaded equally on both sides with more aft
D.allowed to sit anywhere -
单项选择题
If help has not arrived in 10-12 hours after you abandon a vessel in a survival craft，you should（）.
A.go in one direction until the fuel runs out
B.plot a course for the nearest land
C.take a vote on which direction you should go
D.shut down the engine(s) and set the sea anchor -
单项选择题
For use as protection from gas leaking from a refrigeration unit，each ship must be equipped with a（）.
A.portable ventilation system
B.flame safety lamp
C.self-contained breathing apparatus
D.gas mask
