單項(xiàng)選擇題An unstable upright equilibrium position on a vessel means that the mrtacenter is（）.

A.lower than the center of gravity
B.at the same height as the center of gravity
C.heigher than the baseline
D.on the longitudinal centerline


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1.單項(xiàng)選擇題An upright vessel has negative GM. GM becomes positive at the angle of loll because the（）.

A.free surface effects are reduced due to pocketing
B.KG is reduced as the vessel seeks the angle of loll
C.effective beam is increased causing BM to increase
D.underwater volume of the hull is increased

2.單項(xiàng)選擇題Anchors are prevent from running out when secured by the（）.

A.brake
B.devil's claw
C.pawls
D.All of the above

3.單項(xiàng)選擇題Annual inspection of vessel cranes shall be conducted by（）.

A.HAS
B.the person in charge
C.a qualified inspector
D.the crane operator

4.單項(xiàng)選擇題Another name for coal naphtha that would appear on a dangerous cargo manifest is（）.

A.benzene
B.tar
C.middle oil
D.toluene

5.單項(xiàng)選擇題Any vessel in need of carring out deck washing must be（）by the department concerned beforehand.

A.requested
B.allowed
C.approved
D.inquired