单项选择题

The life jackets on all vessels shall be（）.

A.inspected weekly
B.worn at all times
C.readily available
D.tested yearly

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单项选择题

The last shot of an anchor cable is usually painted（）.

A.white
B.international orange
C.yellow
D.red

单项选择题

Safety shackles are fitted with（）.

A.a threaded bolt
B.a round pin，with a cotter pin
C.a threaded bolt，locknuts，and cotter pins
D.round pins and locknuts

单项选择题

Required lifesaving equipment on existing vessels may becontinued in use on the vessel if（）.

A.kept on board no more than 2 years
B.inspected and serviced every 6 months
C.destroyed if more than 5 years old
D.maintained in good and serviceable condition