單項選擇題The original equilibrium position is stable when（）.

A.metacentric height is positive
B.metacentric radius is positive
C.KG exceed maximum allowable limits
D.Free surfaces are excessive


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1.單項選擇題Emergency escape breathing device on board shall have a duration of service no less than（）.

A.20 minutes
B.15 minutes
C.10 minutes
D.5 minutes

3.單項選擇題The master shall ensure that any seafarers（）are provided with an adequate period of rest.

A.who have performed work for 14 hours
B.who have performed work in a scheduled rest period
C.who have performed work in a scheduled work period
D.who works hard

4.單項選擇題The hatch at the after end of the canopy in a lifeboat（）the after lifting hook, painter, and tow line.

A.give access to
B.links up with
C.have contact with
D.is constructed of

5.單項選擇題How many hours of rest is the minimum required in a normal day?（）

A.14 hours
B.10 hours
C.6 hours
D.It does not matter as long as my overtime is paid for