A.Foam should not be used on electrical fires
B.One kilo of low expansion foam solution produces much more foam
C.Foam is only efficient when it covers the top of burning combustibles
D.A stream of foam should be deflected off the deck in order to best agitate the fire
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A.Stranding or grounding
B.Striking upon rocks or shoals
C.Collision between ships
D.Fire
A.Check the tag to see when the extinguisher was last charged
B.Release a small amount of CO2; if the CO2 discharges，the extinguisher is acceptable
C.Weigh the extinguisher and compare the weight against that stamped on the valve
D.Recharge the extinguisher at least once each year
A.The temperature of the substance must be equal to or above its fire point
B.The air must contain oxygen in sufficient quantity
C.The mixture of vapors with air must be within the explosive range
D.All of the above
A.that all personnel are seated in the craft
B.that the cable has not jumped any grooves on the drum
C.which way the wind is blowing
D.the hydraulic fluid level before lifting
A.break the water surface with your hands when diving head-first
B.use your hands to hold your knees to your chest
C.cover your eyes with one hand while pinching your nose shut and covering your mouth with the other
D.enter the water at the bow or stern on the windward side of the vessel
最新試題
All the traces are（）old ones.
A VESSEL，OTHER THAN A RESCUE UNIT，DESIGNATED TO CO-ORDINATE SURFACE SEARCH AND RESCUE OPERATION WITHIN A SPECIFIED AREA is known as（）.
Downwind for 1 miles，alter to starboard 90 degrees，go down this course for 1 mile；Then alter 90 degrees to starboard and go down this course for 2 miles；Then alter 90 degrees to starboard and go down this course for 2 miles；Keep adding 1 mile ever time you alter to starboard．This operation is（）search pattern
When carrying out a parallel track search pattern，the course of the search units should normally be which of the following（）.
The ship which strikes any other vessel is called the（）.
When a rescue vessel approaches a lifeboat in heavy seas，the person in charge of the lifeboat should（）.
In case of your steering gear failed，（）should be exhibited in shapes or lights.
If an airplane circles a vessel 3 times，crosses the vessel’s course close ahead while rocking the wings，and heads off in a certain direction，what does this indicate（）.
Which statement about firefighting foam is TRUE?（）
MERSAR is replaced by（）.