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单选题
The effect of free surface on initial stability depends upon（）.
A
the amount of liquid in the compartment
B
the dimensions of the liquid surface and the vessel's displacement
C
only the length of the compartment
D
the vertical position of the liquid in the vessel
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考题
The correction to KG for longitudinal free surface effects for a vessel can be found by dividing the vessel's displacement into the ______．A.Transverse free surface correction for the vesselB.Sum of the vertical moments of the vesselC.Sum of the longitudinal free surface moments of the vesselD.Longitudinal centerline of the vessel
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Which statement about the free surface effect is TRUE ________．A.It increases in direct proportion to the length of the tank times the breadth squaredB.It decreases at increased angles of heel due to pocketing when a tank is 90% fullC.It decreases in direct proportion to increasing specific gravity of the liquid in the tankD.In practice，the correction is considered to be a virtual reduction of KG
考题
The free surface corrections depend upon the dimensions of the surface of the free liquids and the ______．A.volume of liquid in the tankB.displacement of the vesselC.location of the tank in the vesselD.height of the center of gravity of the vessel
考题
As the displacement of a vessel increases,. the detrimental effect of free surface ______.A.increasesB.decreasesC.remains the sameD.may increase or decrease depending on the fineness of the vessel’s form
考题
GM is a measure of ______.① The initial stability of a vessel.② The rightingness of the vessel.A.① onlyB.② onlyC.Both ① and ②D.Neither ① nor ②
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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 areaB
The vessel can probably be saved if further flooding can be stoppedC
The vessel will continue to slowly list and/or trim due to the free surface effect and free communication effectD
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考题
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 GMB
KG increases due to the weight of the added water on deckC
BM decreases from loss of water plane and greater volumeD
There is no effect on transverse stability
考题
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 loadsB
total displacementC
lightweightD
deadweight
考题
单选题The correction to KG for longitudinal free surface effects for a vessel can be found by dividing the vessel’s displacement into the（）.A
transverse free surface correction for the vesselB
sum of the vertical moments of the vesselC
sum of the longitudinal free surface moments of the vesselD
longitudinal centerline of the vessel
考题
单选题The effects of free surface on a vessel’s initial stability do NOT depend upon the（）.A
volume of displacement of the vesselB
dimensions of the surface of the liquidC
amount of liquid in slack tanksD
specific gravity of the liquid in the tank
考题
单选题As the displacement of a vessel increases, the detrimental effect of free surface（）.A
increasesB
decreasesC
remains the sameD
may increase or decrease depending on the fineness of the vessel's form
考题
单选题The angle of loll is a stability term which applies to a floating ship with（）.A
off-center loadingB
stiff characteristicsC
excessive pitch or rollD
negative initial stability
考题
单选题Topside icing decreases vessel stability because it is usually off-center and（）.A
increases displacementB
increases the height of the center of gravityC
increases draftD
reduces the pocketing of free surface
考题
单选题You may improve a vessels stability by （）.A
keeping the fuel tanks topped offB
increasing the free surface effectC
keeping the fuel tanks at least half MID
keeping at least one fuel tank empty for slops
考题
单选题Initial stability refers to stability（）.A
at small angles of inclinationB
when loaded with minimum deck loadC
when at transit draftD
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单选题In the construction of a diesel engine, what is the purpose of end plates?（）A
To provide accessibility to the cylinder linersB
To add stability to the engine blockC
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To make a surface for the base
考题
单选题The principal danger from ice collecting on a vessel is the（）.A
decrease in capabilities of radarB
decrease in displacementC
adverse effect on trimD
loss of stability
考题
单选题Topside icing that blocks freeing ports and scuppers（）.A
is usually below the center of gravity and has little effecton stabilityB
will cause water on deck to pocket and increase stabilityC
may decrease stability by increasing free surface effect due to water on deckD
increases the effective freeboard and increases thewind-heel affect
考题
单选题Many vessels are provided with flume tanks，which also have a dump tank located under the flume tanks. In the event the ship is damaged，you could dump the flume tanks into the dump tank which would（）.A
reduce the free surface effect and raise the KGB
not have any effect on free surface and raise the KGC
reduce the free surface effect and lower the KGD
not have any effect on free surface and lower the KG
考题
单选题A wooden plug fitted tightly in the vent of a damaged tank may prevent the tank from（）.A
filling completelyB
developing free surfaceC
developing free surface momentD
collapsing
考题
单选题What is the principal danger from the liquid in a half full tank onboard a vessel?（）A
Corrosion from the shifting liquidB
Rupturing of bulkheads from the shifting liquidC
Loss of stability from free surface effectD
Holing of the tank bottom from the weight of the shifting liquid
考题
单选题The effects of free surface on initial stability depend upon the dimensions of the surface of the free liquids and the（）.A
volume of liquid in the tankB
volume of displacement of the vesselC
location of the tank in the vesselD
height of the center of gravity of the vessel
考题
单选题A serious loss of reserve buoyancy resulting from flooding any compartment of a ship will always（）.A
increase the trimB
change the free surface effectC
cause a serious listD
decrease ship stability
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