單項選擇題If you must jump from a ship，your posture should include（）.

A.holding down the life preserver against the chest with one arm crossing the other，covering the mouth and nose with a hand，and feet together
B.knees bent and held close to the body with both arms around legs
C.body straight and arms held tightly at the sides for feet first entry into the water
D.both hands holding the life preserver below the chin，with knees bent，and legs crossed


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2.單項選擇題How many adult life jackets are required on board a ship?（）

A.Enough for 100 percent of the persons allowed on board
B.One for each work station and industrial work site
C.Enough for 150 percent of the persons allowed on board
D.Both A and B above

3.單項選擇題Heavy fuel oils when spilled are（）.

A.more harmful to sea life than lighter oils
B.easier to clean up than lighter refined oils
C.less harmful to sea life than lighter oils
D.not a real threat to marine life

4.單項選擇題Each life preserver must be readily accessible to the person for whom it is intended while he or she is（）.

A.at work
B.in his or her berthing area
C.BOTH at work and in his or her berthing area
D.None of the above are correct

5.單項選擇題Each life jacket light that has a non-replaceable power source must be replaced（）.

A.every 6 months after initial installation
B.every 12 months after initial installation
C.every 24 months after initial installation
D.on or before the expiration date of the power source