tipping center
center of buoyancy
center of gravity
turning center
第1题：
A ship lists and trims about the ______．
A.Center of gravity
B.Center of buoyancy
C.Center of flotation
D.Centroid of the underwater volume
第2题：
For a floating vessel, the center of flotation is the point in the waterplane ______.
A.about which the vessel lists and trims
B.which coincides with the center of buoyancy
C.which, in the absence of external forces, is always vertically aligned with the center of gravity
D.which is shown in the hydrostatic tables as VCB
第3题：
Free Radio Pratique will be granted by the Port Health Office in the following case ______ ．
A.Vessel with a case or suspected case of infectious disease on board
B.Vessel with a dead body on board
C.Vessel which has visited plague-infected ports during the current voyage
D.Cargo vessel which hasn't called at any plague infected ports during the current voyage and on which there is not any case of infectious disease，or any dead body
第4题：
10
30
17
16
第5题：
If a vessel subject to PSC inspection, PSC Officer shall give the inspection to the Captain, the given timeframe for rectification of each deficiency is commonly given in a coded form which called “action code”, which code listed below is used for indication of detention of the vessel?（）
第6题：
The extension of the after part of the keel in a single-screw vessel upon which the stern post rests is called the ______．
A.boss
B.knuckle
C.skeg
D.strut
第7题：
船舶左舷的艉部叫左艉舷。（）
第8题：
A drilling bit which is doughnut shaped to permit recovery of the center portion of the hole drilled is called a ______.
A.diverter bit
B.hole reamer
C.core bit
D.conventional bit
第9题：
forward perpendicular
amidships
longitudinal center of floatation
after perpendicular
第10题：
ship in the wrong
responsible vessel
vessel to be responsible
wrong ship