The stability of a semisubmersible ship would be seriously reduced if flooding occurred in the（）.

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• Which of the following will increase the positive stability of your vessel?（）.

  A . Loading weight on deck B . Discharging weight from lower decks C . Shifting weight from upper to lower decks D . Shifting weight from lower to upper deck

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• The stability of a vessel is normally the greatest when all fuel and water tanks are full because the （）.

  A . center of gravity is lowered B . center of buoyancy is lowered C . reserve buoyancy is unchanged D . hull freeboard is increased

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• If the cause of a sudden severe list is negative initial stability，counterflooding into empty tanks may（）.

  A . increase the righting moment B . cause an increase in the righting arm C . bring the vessel to an upright equilibrium position D . cause the vessel to flop to a greater angle

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• Stability is determined principally by the location of two points in a vessel: the center of buoyancy and the（）.

  A . metacenter B . geometric center of the waterplane area C . center of gravity D . center of flotatio

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• At all angles of inclination，the true measure of a vessel’s stability is the（）.

  A . metacentric height B . displacement C . righting moment D . inclining moment

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• At all angles of inclination, the ttrue measure of a vessel''s stability is the（）.

  A . metacentric height B . displacement C . righting moment D . inclining moment

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• If the cause of a sudden severe list or trim is negative initial stability，counter flooding into empty tanks may（）.

  A . increase the righting moment B . cause an increase in the righting arm C . bring the unit to an upright equilibrium position D . cause the unit to flop to a greater angle

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• Stability is determined principally by the location of the center of gravity and the（）.

  A . aft perpendicular B . center of buoyancy C . keel D . center of flotatio

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• Transverse stability calculations require the use of（）.

  A . hog or sag calculations or tables B . hydrostatic curves C . general arrangement plans D . cross-sectional views of the vessel

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• Fighting a rig fire in the ballast pumproom with hoses would adversely affect the stability of the rig most by（）.

  A . increasing the permeability of the pumproom B . reduction of drill water from the storage tanks C . a list caused by water filling the compartment D . a reduced KG caused by water filling the compartment

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• 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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• Which of the following is the reason that the metacentric height is a valid measure of only the initial stability?（）.

  A . The metacenter does not remain in the same position for large angles of inclination B . The center of gravity shift due to inclination C . The center of gravity shifts above the metacenter as the vessel is inclined D . The mean draft will change as the vessel is inclinded

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• The effects of free surface on a vessel’s initial stability do NOT depend upon the（）.

  A . volume of displacement of the vessel B . dimensions of the surface of the liquid C . amount of liquid in slack tanks D . specific gravity of the liquid in the tank

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• When considering a vessel’s stability，which spaces in a general cargo vessel are the best locations for the carriage of bulk grain? （）

  A . Deep tanks B . Lower holds C . Lower holds at the ends of the vessel D . 'Tween-deck

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• Stability is determined by the relationship of the center of gravity and the（）.

  A . water depth B . keel C . center of flotation D . center of buoyancy

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• The angle of loll is a stability term which applies to a floating ship with（）.

  A . off-center loading B . stiff characteristics C . excessive pitch or roll D . negative initial stability

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• （） is not the information necessary for the master to obtain guidance as to the stability of the ship.

  A . a curve of minimum operational metacentric height（GM）versus draught B . instructions concerning the operation of cross-flooding arrangements C . the signals or lights being exhibited or sounded D . all other data and aids which might be necessary to maintain stability after damage

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• Cross curves of stability show which of the following?（）.

  A . The righting arms at various angles of inclination and displacement B . The metacentric height at large angle of heel C . The height of the center of buoyancy at various angles D . The metacentric radius at various angle

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• Cross curves of stability show which of the following（）.

  A . The righting arms at various angles of inclination and displacement B . The metacentric height at large angles of heel C . The height of the center of buoyancy at various angles D . The metacentric radius at various displacement

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• Fighting a rig fire in a watertight compartment with hoses could reduce the stability of the rig by（）.

  A . progressive downflooding B . reducing the level of drill water from the storage tanks C . causing a list due to the water in the compartment D . reducing the KG to minimum allowable

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• 12. GM is a measure of ___. ① The initial stability of a vessel；② The rightingness of the vessel.

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• Egg yolk contains lecithin which acts a an emulsifier. It can be used to stabilize emulsions. Adding egg yolk to a mixture of oil and water prevents the two liquids from separating.

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• What reason is given for the stability of the arch？

  A．A concrete foundation supports the arch. B．The arch is built with wedge-shaped blocks. C．The Romans made a strong type of concrete. D．The pressure flows up to the keystone.

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• Which of the following is cited by the author as the place where the supply of water is most likely to threaten social stability？

  A．Africa. B．The southern hemisphere. C．Egypt. D．All the developed countries.

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