A neutral equilibrium position for a vessel means that the metacenter is ______.A.lower than the keelB.at the same height as the center of gravityC.exactly at midshipsD.at the center of the waterplane area

A neutral equilibrium position for a vessel means that the metacenter is ______.

A.lower than the keel

B.at the same height as the center of gravity

C.exactly at midships

D.at the center of the waterplane area


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单选题A large vessel is equipped with a controllable pitch propeller. Which statement is TRUE?().AWhen dead in the water,it is often difficult to find the neutral position and slight headway or sternway may resultBWhen going directly from full ahead to full astern,there is complete steering controlCWhen the vessel has headway and the propeller is in neutral,there is no effect on rudder controlDWhen maneuvering in port,full ahead or astern power can usually be obtained without changing shaft RPM

单选题A neutral equilibrim position for a vessel means that the metacenter is().Alower than the keelBat the same height as the center of gravityCexactly at midshipsDat the center of the waterplane area

单选题Stable equilibrium for a vessel means that the metacenter is().Aat a lower level than the baselineBon the longitudinal centerlineChigher than the center of gravityDat amidships

单选题In a weather report, position good means that the position is().Aa good oneBreliableCis easy to be fixedDobtainable

单选题The center of buoyancy and the metacenter are in the line of action of the buoyant force().Aonly when there is positive stabilityBonly when there is negative stabilityConly when there is neutral stabilityDat all times

单选题Magnetic variation changes with a change in().Athe vessel's headingBsea conditionsCseasonsDthe vessel's position

单选题The original equilibrium position is stable when().Ametacentric height is positiveBmetacentric radius is positiveCKG exceed maximum allowable limitsDFree surfaces are excessive

单选题A position obtained by applying ONLY your vessel’s course and speed to a known position is a ().AfixBdead-reckoning positionCrunning fixDprobable position

单选题An unstable upright equilibrium position on a vessel means that the mrtacenter is().Alower than the center of gravityBat the same height as the center of gravityCheigher than the baselineDon the longitudinal centerline

单选题When cargo is shifted from the main deck into the lower hold of a vessel,().AThe metacenter will move downwardBThe GM will increaseCThe center of buoyancy will move upwardDThe list of the vessel will become great

单选题When using horizontal sextant angles of three objects to fix your position,an indeterminate position will result in which situation().AThe objects lie in a straight lineBThe vessel is inside of a triangle formed by the objectsCThe vessel is outside of a triangle formed by the objectsDA circle will pass through your position and the three objects

单选题Which of the following is the reason that the metacentric height is a valid measure of only the initial stabilit?().AThe metacenter does not remain in the same position for large angles of inclinationBThe center of gravity shifts due to inclinationCThe center of gravity shifts above the metacenter as the vessel is inclinedDThe mean draft will change as the vessel is inclined

单选题An unstable upright equilibrium position on a vessel means that the metacenter is().Alower than the center of gravityBat the same height as the center of gravityChigher than the baselineDon the longitudinal centerline

单选题For a floating vessel, the center of buoyancy and the metacenter are in the line of action of the buoyant force().Aonly when there is positive stabilityBonly when there is negative stabilityConly when there is neutral stabilityDat all times

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单选题If the cause of a sudden severe list is negative initial stability,counterflooding into empty tanks may().Aincrease the righting momentBcause an increase in the righting armCbring the vessel to an upright equilibrium positionDcause the vessel to flop to a greater angle