單項選擇題What is the minimum number of deck officers，able seaman or certificated persons required for a lifeboat on a vessel in ocean service?（）

A.Two
B.Three
C.Four
D.Five


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1.單項選擇題What is the accepted standard for wire rope falls used in connection with the lifeboat gear?（）

A.Six by seven galvanized wire rope
B.Six by twenty-four improved plow steel wire rope
C.Six by thirty-seven preformed fiber-core wire rope
D.Six by nineteen regular-lay filler wire rope

2.單項選擇題What is required by regulations concerning the stowage of lifeboats on cargo vessels?（）

A.Each lifeboat must have a launching appliance
B.Launching appliances must be of the gravity type
C.There may not be more than two launching appliances on the same deck
D.All of the above

3.單項選擇題What could be a result of insufficient lubrication of lifeboat winches and davits?（）

A.Moisture accumulation in winch motor damaging the electrical wiring
B.Freezing of gears in cold weather
C.Corroding of sheaves on the davits so they will not rotate
D.All of the above

5.單項選擇題To keep injured survivors warm in the water after abandoning a ship，they should（）.

A.be placed in the middle of a small circle formed by the other survivors in the water
B.float on their backs with their arms extended for maximum exposure to the air
C.remove their life preservers and hold on to the uninjured survivors
D.sip seawater at intervals of fifteen minutes