單項選擇題Aluminum lifeboats are subject to damage by electrolytic corrosion (the aluminum being eaten away). In working around boats of aluminum you must be very careful（）.

A.to keep the boats covered at all times
B.not to leave steel or iron tools lying in or near these boats
C.to keep an electric charge on the hull at all times
D.to rinse these boats regularly with salt water


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1.單項選擇題All inflatable liferafts have（）.

A.safety straps from the overhead
B.built in seats
C.releasing hooks at each end
D.water stabilizing pockets

2.單項選擇題After conducting an abandonment drill，the Master or person in charge of a ship shall log（）.

A.the names of crew members who participated in the drill
B.the length of time that each motor propelled lifeboat was operated in the drill
C.the length of time the lifeboat was in the water
D.the time it took to lower the boat

3.單項選擇題According to the Code of Federal Regulations，on vessels other than river ferryboats and river vessels，how are periodic lifeboat weight tests required to be conducted?（）

A.The lifeboat is lowered to near the water，loaded with the allowed capacity，lowered into the water until afloat，then released from the falls
B.The lifeboat is loaded with the allowed capacity，lowered into the water until afloat，then released from the falls
C.The lifeboat is lowered into the water until afloat，loaded with the allowed capacity，then released from the falls
D.The lifeboat is lowered to near the water，loaded with the allowed capacity，then released from the falls

4.單項選擇題A self-righting survival craft will return to an upright position provided that all personnel（）.

A.are seated with seat belts on and doors shut
B.are seated with seat belts on and doors open
C.are to shift to one side to right it
D.escape from the craft