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A virtual rise in the center of gravity may be caused by ______.
A.filling a partially filled tank
B.using an on board crane to lift a freely swinging heavy object
C.emptying a partially filled tank
D.transferring ballast from the forepeak to the after peak
参考答案
更多 “ A virtual rise in the center of gravity may be caused by ______.A.filling a partially filled tankB.using an on board crane to lift a freely swinging heavy objectC.emptying a partially filled tankD.transferring ballast from the forepeak to the after peak ” 相关考题
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The righting moment can be determined by multiplying the displacement by the ______．A.vertical center of gravity（KG）B.longitudinal center of gravity（LCG）C.righting arm（GZ）D.center of gravity（CG）
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With no environmental forces acting on the vessel，the center of gravity of an inclined vessel is vertically aligned with the ______．A.longitudinal centerlineB.center of flotationC.original vertical centerlineD.metacenter
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A vessel aground may have negative GM since the ______.A.decrease in KM is equal to the loss of draftB.virtual rise of G is directly proportional to the remaining draftC.lost buoyancy method is used to calculate KM, and KB is reducedD.displacement lost acts at the point where the ship is aground
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A vessel may acquire a list if the center of gravity is ______. ① Off the centerline. ② Too high in the vessel.A.① onlyB.② onlyC.Either ① or ②D.Neither ① nor ②
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单选题The difference between the height of the metacenter and the height of the center of gravity is known as the（）.A
metacentric heightB
height of the righting armC
fore and aft perpendicularD
height of the center of buoyancy
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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
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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
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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
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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
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单选题A partially full tank causes a virtual rise in the height of the（）.A
metacenterB
center of buoyancyC
center of flotationD
center of gravity
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单选题A flooded lifeboat on board a vessel would adversely affect the vessel’s stabbility by（）.A
increasing the righting momentB
decreasing the vessel's displacementC
increasing the reserve buoyancyD
shifting the CG(center of gravity) off center
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单选题The existence of liquids in partially full tanks or compartments of a ship causes a virtual rise in the height of the（）.A
metacenterB
center of buoyancyC
center of flotationD
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单选题The center of buoyancy is located at the（）.A
geometric center of the waterplane areaB
intersection of the vertical centerline and line of action of the buoyant forceC
center of gravity of the vessel corrected for free surface effectsD
geometric center of the displaced volume
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单选题A crankshaft whose center of gravity coincides with its center line is said to be （）.A
dynamically balancedB
statically balancedC
counter balancedD
resonantly balanced
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单选题The center of the underwater volume of a floating vessel is the（）.A
center of buoyancyB
center of flotationC
uncorrected height of the center of gravity of the vesselD
center of gravity of the vessel corrected for free surface effects
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单选题A crankshaft whose center of gravity coincides with its center line is said to be（） Ⅰ.statically balanced Ⅱ.dynamically balancedA
Ⅰ onlyB
Ⅱ onlyC
both Ⅰ and ⅡD
neither Ⅰ nor Ⅱ
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单选题Which of the following is the reason that the metacentric height is a valid measure of only the initial stabilit?（）.A
The metacenter does not remain in the same position for large angles of inclinationB
The center of gravity shifts due to inclinationC
The center of gravity shifts above the metacenter as the vessel is inclinedD
The mean draft will change as the vessel is inclined
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单选题When the（）is large, the ship is stiff; and when it is small, she is tender.A
GMB
free surfaceC
longitudinal center of gravityD
transverse center of gravity
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单选题Addition of weight above the center of gravity of a vessel will ALWAYS（）.A
reduce initial stabilityB
increase righting momentsC
increase GMD
All of the above
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单选题A virtual rise in the center of gravity may be caused by（）.A
filling a partially filled tankB
using an on board crane to lift a freely swinging heavy objectC
emptying a partially filled tankD
transferring ballast from the forepeak to the after peak
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单选题Stability is determined principally by the location of the center of gravity and the（）.A
aft perpendicularB
center of buoyancyC
keelD
center of flotation
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单选题The distance traveled by the center of gravity perpendicular to the original course is（）.A
transferB
advanceC
kickD
tactical diameter
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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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单选题The point to which your vessel’s center of gravity (G) may rise and still permit the vessel to have positive stability is called the（）.A
metacentric pointB
metacenterC
metacentric radiusD
tipping center
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单选题A virtual rise in the center of gravitty may be caused by（）.A
filling a partially tankB
using an on board crane to life a freely swinging heavy objectC
emptying a partially filled tankD
transferring ballast from the forepeak to the after peak
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单选题A flooded leg on a lift boat would adversely affect the vessel’s stability underway by（）.A
increasing the righting momentB
decreasing the vessel's displacementC
increasing the reserve buoyancyD
shifting the CG (center of gravity) off center
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