An unstable upright equilibrium position on a vessel means t

【名词&注释】

垂直距离(vertical dimension)、外力作用(exogenous process)、具体情况(concrete conditions)、基平面(base plane)、上边缘(coboundary)

[单选题]An unstable upright equilibrium position on a vessel means that the metacenter is（）.

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

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学习资料：

[单选题]平均型吃水是指在船舶中线面上，从正浮水线沿垂直于基平面的方向量到龙骨板（）的垂直距离。

A. A．上边缘^(coboundary)
B. B．中心
C. C．下边缘
D. D．视具体情况而定

[单选题]船舶受外力作用发生纵倾前后的重力（），重心位置（）。

A. A．相等；不变
B. B．相等；改变
C. C．不等；改变
D. D．不等；不变

[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

[单选题]某轮吃水d=9.0m，水线面面积AW=1800m2，则此时船舶的海水厘米吃水吨数为（）。

A. A．16.0
B. B．18.1
C. C．18.45
D. D．16.4

[单选题]What is not usually a concern when loading a single-hulled tanker?（）

A. Bending moments
B. Initial stability
C. Draft
D. Trim

[单选题]As the displacement of a vessel increases，the detrimental effect of free surface（）.

A. increases
B. decreases
C. remains the same
D. may increase or decrease depending on the fineness of the vessel's form

[单选题]Load line regulations are designed to insure that a vessel has adequate structural strength and sufficient（）.

A. lifesaving equipment
B. stability
C. mooring tension
D. riser tensio

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