船舶由海水水域驶入淡水水域时，船舶所受浮力（）。

【名词&注释】

船舶排水量(ship displacement)

[单选题]船舶由海水水域驶入淡水水域时，船舶所受浮力（）。

A. A．减少
B. B．增加
C. C．不变
D. D．变化不定

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学习资料：

[单选题]当船舶某装载状态下的某处水线达到水尺标志的数字的（）处时，则该处的吃水为该数字加上5cm。

A. A．中间
B. B．顶边缘
C. C．底边缘
D. D．1/3处

[单选题]某船由密度为ρ1=1.021g/cm3的水域驶入密度为ρ2=1.004g/cm3的水域，船舶排水量Δ=12015t，每厘米吃水吨数TPC=16.82t/cm，则船舶平均吃水改变量为（）cm。

A. A．10
B. B．12
C. C．14
D. D．8

[单选题]船舶的每厘米吃水吨数TPC在数值上等于（）。

A. A．平均吃水变化1cm时船舶浮力的改变量
B. B．平均吃水变化1cm时船舶排水量的改变量
C. C．正浮时排水量变化1t船舶其吃水变化的厘米数
D. D．A、B均是

[单选题]Your vessel was damaged and initially assumed a significant list and trim; however，further increase has been slow. Based on this data，what should you expect?（）

A. The slowing is only temporary and the vessel will probably suddenly capsize or plunge from loss of stability due to change in the waterplane area
B. The vessel can probably be saved if further flooding can be stopped
C. The vessel will continue to slowly list and/or trim due to the free surface effect and free communication effect
D. The vessel will suddenly flop to the same or greater angle of list on the other side and may capsize

[单选题]Aboard a vessel，dividing the sum of the longitudinal moments by the total weight yields the vessel’s（）.

A. inclining moments
B. righting moments
C. vertical moments
D. longitudinal position of the center of gravity

[单选题]Aboard a vessel，multiplying a load’s weight by the distance of the load’s center of gravity from the centerline results in the load’s（）.

A. TCG
B. transverse moment
C. righting moment
D. transverse free surface moment

[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]The total weight of cargo，fuel，water，stores，passengers and crew，and their effects，that a ship can carry，is the（）.

A. bale cubic
B. deadweight
C. gross tonnage
D. loaded displacement

[单选题]To calculate the free surface correction，it is necessary to divide the free-surface moments by the（）.

A. total weight of liquid loads
B. total displacement
C. lightweight
D. deadweight

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