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单选题
The center of buoyancy is located at the（）.
A
geometric center of the waterplane area
B
intersection of the vertical centerline and line of action of the buoyant force
C
center of gravity of the vessel corrected for free surface effects
D
geometric center of the displaced volume
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The Tower of London, a historical sight, located in the center of London, was built by William the Conqueror.()
此题为判断题(对，错)。
考题
In the absence of external forces，adding weight on one side of a floating vessel causes the vessel to ().A.heel until the angle of loll is reachedB.list until the center of buoyancy is aligned vertically with the center of gravityC.trim to the side opposite TCG until all moments are equalD.decrease draft at the center of flotation
考题
Cross curves of stability show which of the following？A.The righting arms at various angles of inclination and displacementB.The metacentric height at large angles of heelC.The height of the center of buoyancy at various anglesD.The metacentric radius at various displacements
考题
Jettisoning weight from topside ______.A.returns the vessel to an even keelB.reduces free surface effectC.lowers the center of gravityD.raises the center of buoyancy
考题
For a floating vessel, the center of buoyancy and the metacenter are in the line of action of the buoyant force ______.A.only when there is positive stabilityB.only when there is negative stabilityC.only when there is neutral stabilityD.at all times
考题
If a vessel lists to port, the center of buoyancy will ______.A.move to portB.move to starboardC.move directly downD.stay in the same position
考题
In small angle stability, when external forces exist, the buoyant force is assumed to act vertically upwards through the center of buoyancy and through the ______.A.center of gravityB.center of flotationC.metacenterD.metacentric height
考题
In the presence of external forces, the center of buoyancy of an inclined vessel is vertically aligned with the ______.A.center of gravityB.metacenterC.center of flotationD.Keel
考题
Today,the City of London is the business center of London where（）are located.Abig supermarketsBtheatres and cinemasClarge financial organizationsDrestaurants and cafes
考题
单选题Which of the following will increase the height of the center of buoyancy for your vessel?（）.A
Discharging weight from lower decksB
Loading weight in upper decksC
Shifting weight from lower to upper decksD
Shifting weight from upper to lower decks
考题
单选题What is the definition of transverse metacenter?（）A
The distance between the actual center of gravity and the maximum center of gravity that will still allow a positive stabilityB
The point to which G may rise and still permit the vessel to possess positive stabilityC
The sum of the center of buoyancy and the center of gravityD
The transverse shift of the center of buoyancy as a vessel rolls
考题
单选题In order to determine the trimming arm for your vessel at any particular draft，which of the following would you compare?（）.A
Longitudinal center of buoyancy and longitudinal center of gravityB
Longitudinal center of floatation and longitudinal center of gravityC
Longitudinal center of floatation and longitudinal center of buoyancyD
Longitudinal tipping center and longitudinal center of gravity
考题
单选题The center of flotation of a vessel is（）.A
the center of volume of the immersed portion of the vesselB
the center of gravity of the water planeC
that point at which all the vertical downward forces of weight are considered to be concentratedD
that point at which all the vertical upward forces of buoyancy are considered to be concentrated
考题
单选题The center of buoyancy and the metacenter are in the line of action of the buoyant force（）.A
only when there is positive stabilityB
only when there is negative stabilityC
only when there is neutral stabilityD
at all times
考题
单选题When a vessel is inclined by an external force，the（）.A
shape of the vessel's underwater hull remains the sameB
vessel's center of gravity shifts to the center of the vessel's underwater hullC
vessel's center of buoyancy shifts to the center of the vessel's underwater hullD
vessel's mean draft increases
考题
单选题The mean draft of a ship is the draft（）.A
midway between the forward and aft draft marksB
at the center of flotationC
at the load lineD
at the center of buoyancy
考题
单选题If a vessel list to port,the center of buoyancy will（）.A
move to portB
move to starboardC
move directly downD
stay in the position
考题
单选题In small-angle stability，when external forces exist，the buoyant force is assumed to act vertically upwards through the center of buoyancy and through the（）.A
center of gravityB
center of flotationC
metacenterD
metacentric height
考题
单选题In the presence of external forces，the center of buoyancy of an inclined vessel is vertically aligned with the（）.A
center of gravityB
metacenterC
center of flotationD
keel
考题
单选题Stability is determined by the relationship of the center of gravity and the（）.A
water depthB
keelC
center of flotationD
center of buoyancy
考题
单选题In the absence of external forces, the center of gravity of a floating vessel is located directly above the（）.A
metacenterB
amidshipsC
center of floatationD
geometric center of the displaced volume
考题
单选题Before counterflooding to correct a list，you must be sure the list is due to（）.A
negative GMB
floodingC
off-center weightD
reserve buoyancy
考题
单选题Jettisoning weight from topside（）.A
return the vesselto an even keelB
reduces free surface effectC
lowers the center of gravityD
raises the center of buoyancy
考题
单选题For a floating vessel, the center of buoyancy and the metacenter are in the line of action of the buoyant force（）.A
only when there is positive stabilityB
only when there is negative stabilityC
only when there is neutral stabilityD
at all times
考题
单选题In the absence of external forces，adding weight on one side of a floating vessel causes the vessel to（）.A
heel until the angle of loll is reachedB
list until the center of buoyancy is aligned vertically with the center of gravityC
trim to the side opposite TCG until all moments are equalD
decrease draft at the center of flotation
考题
单选题When cargo is shifted from the main deck into the lower hold of a vessel,（）.A
The metacenter will move downwardB
The GM will increaseC
The center of buoyancy will move upwardD
The list of the vesel will become great
考题
单选题The important initial stability parameter，GM，is the（）.A
metacentric heightB
height of the metacenter above the keelC
height of the center of buoyancy above the keelD
height of the center of gravity above the keel
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