That center around which a vessel trims is called the（）.

单项选择题Semisubmersibles A and B are identical. However，A is more tender than B. This means that A relative to B has a（）.

A.lower KG
B.smaller GM
C.smaller roll angle
D.larger GZ

单项选择题Progressive flooding may be indicated by（）.

A.ballast control alarms
B.excessive draft
C.excessive list or trim
D.a continual worsening of list or trim

单项选择题Pitching is angular motion of the vessel about what axis?（）.

A.Longitudinal
B.Transverse
C.Vertical
D.Centerline

单项选择题On a vessel proceeding from a very cold to a warm climate with a cargo of a nonhygroscopic nature in the holds，which is TRUE?（）.

A.Danger of heavy ship sweat exists； constant and vigorous ventilation is required
B.There is danger of heavy cargo sweat if outside air is introduced by ventilation
C.There is little danger of ship's sweat，slight possibility of cargo sweat； moderate ventilation is needed
D.The possibility of any sweat problem，either cargo or ship，is remote

单项选择题It would be possible that part of the cargo got（）as great change in the weather during the voyage caused heavy（）in the hold.

A.damp／water
B.dampness／sweater
C.wet／condensation
D.wetness／dew