船舶由半淡水水域驶入淡水水域时，船舶所受浮力（）。

【名词&注释】

有利于(beneficial to)、装载量(load)、照明设备(lighting equipment)

[单选题]船舶由半淡水水域驶入淡水水域时，船舶所受浮力（）。

A. 减少
B. 增加
C. 不变
D. 变化不定

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学习资料：

[单选题]以下（）措施有利于提高夜间观测吃水的精度。

A. A．利用强力照明设备
B. B．水面撒轻物
C. C．投小石击起浪花
D. D．以上均是

[单选题]对于普通货船，每厘米吃水吨数TPC通常随吃水增大而（）。

A. A．增加
B. B．不变
C. C．减少
D. D．A、B均是

[单选题]船舶的每厘米吃水吨数TPC曲线的用途主要是计算船舶（）。Ⅰ.吃水差的改变量；Ⅱ.平均吃水改变量；Ⅲ.初稳性高度的变化量；Ⅳ.装载量的变化值；Ⅴ.重心高度的变化量。

A. A．Ⅰ，Ⅱ，Ⅲ
B. B．Ⅱ，Ⅲ
C. C．Ⅱ，Ⅳ
D. D．Ⅲ，Ⅳ，Ⅴ

[单选题]当（）时，船舶首尾平均吃水等于等容吃水。

A. A．尾倾且漂心在船中前
B. B．尾倾且漂心在船中后
C. C．尾倾且漂心在船中
D. D．以上都有可能

[单选题]Your vessel is damaged with no list，but down by the stern. There is progressive flooding and trim by the stern is increasing. What is the effect on transverse stability after the deck edge at the stern is submerged?（）

A. KB increases，increasing BM and therefore GM
B. KG increases due to the weight of the added water on deck
C. BM decreases from loss of water plane and greater volume
D. There is no effect on transverse stability

[单选题]（）refers to the depth of a vessel below the waterline，measured vertically to the lowest part of the hull，propellers or other reference points.

A. Free board
B. Stability height
C. Metacentric height
D. Draft

[单选题]A moment is obtained by multiplying a force by its（）.

A. couple
B. lever arm
C. moment of inertia
D. point of applicatio

[单选题]The waterplane area is described as the intersection of the surface of the water in which a vessel floats and the（）.

A. baseline
B. vertical reference plane
C. hull
D. horizontal reference plane

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