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directly航海英语部分词汇解释

作者:高考题库网
来源:https://www.bjmy2z.cn/gaokao
2021-01-28 16:47
tags:

directly-risen

2021年1月28日发(作者:encourage)


Angle of loll


负稳性初倾角,负稳性横倾角,失稳横倾角



A ship having a very small negative initial metacentric height GM need


not necessarily capsize. This situation produces an angle of loll.


初稳性


高度为一个非常小的负 值的船舶不一定倾覆。


这种情况产生负稳性横


倾角。

< p>


As the angle of heel increases, the centre of buoyancy will move out still


further to the low side. If the centre of buoyancy moves out to a position


vertically


under


G


,


the


capsizing


moment


will


have


disappeared.


The


angle


of


heel


at


which


this


occurs


is


called


the


angle


of


loll.


It


will


be


noticed that at the angle of loll, the GZ is zero.


随着横倾角增大,


浮心将


缓慢向外移,


进一步移到较低的一舷。


如果浮心向外移至船舶重心的


正下方某一位置,


倾覆力矩将会已经消失。


这时的横倾角称为负稳性


横倾角。将 会注意到在负稳性横倾角处静稳性力臂为


0


< br>


【美国原题】



1. An upright vessel has negative GM. GM becomes positive at the angle


of loll because the ______.


A. free surface effects are reduced due to pocketing


B. KG is reduced as the vessel seeks the angle of loll


C. effective beam is increased causing BM to increase


有效船宽增大


导致


BM


增大



[GM=KB+BM- KG


,如果


(KB-KG)


不变而


BM


增大,


从而导致


GM


增大并转为正值


]


< p>


D. underwater volume of the hull is increased


2. The angle of loll is a stability term which applies to a floating MODU


with ______. MODU: mobile offshore drilling


unit


移动式近海钻井平




A. off-center loading









B. stiff characteristics


C. excessive pitch or roll






D.


negative initial stability



3.



A MODU


is inclined at an


angle of


loll.



In the absence of external


forces, the righting arm (GZ) is ______. righting arm (GZ)


复原力臂,也


称为静稳性力臂



A. positive





B. negative



C. zero







D. vertical


4. A floating MODU with an initial negative metacentric height ______.


A. will capsize



















B. will incline further


C. may lie at an angle of loll








D. may be initially level


5.



When a floating


MODU


inclines to an angle slightly greater than the


angle of loll, she will ______.


A. capsize




















B. incline further


C. flop to the other side









D. return to the angle of loll



6. When a floating MODU inclines to an angle slightly less than the angle


of loll, she will ______.


A. capsize




















B. incline less


C. flop to the other side









D. return to the angle of loll



7. At an angle of loll, the capsizing moment is ______. capsizing moment


倾覆力矩



A. maximum




B. negative




C. positive




D. zero



8. At an angle of loll, the righting arm (GZ) is ______.


A. maximum




B. negative




C. positive, but reflexive




D. zero




Liftboat


多功能工程船



A liftboat is a self-propelled, self- elevating vessel with a relatively large


open


deck


capable


of


carrying


equipment


and


supplies


in


support


of


various


offshore


mineral


exploration


and


production


or


offshore


construction activities. A liftboat also has the capability of rapidly raising


its


hull


clear


of


the


water


on


its


own


legs


so


as


to


provide


a


stable


platform


from


which


maintenance


and


construction


work


may


be


conducted.



【美国原题】



1.


Y


ou


are


operating


a


liftboat.


Before


starting


jacking


operations


you


should ______.


A. put the crane in a vertical position


B. close the wheelhouse doors


C. have all personnel don life jackets


叫所有人员穿救生衣



D. put a watch in the engineroom


2. A flooded leg on a liftboat would adversely affect the vessel's stability


underway by ______.


A. increasing the righting moment


B. decreasing the vessel's displacement


C. increasing the reserve buoyancy


D. shifting the CG (center of gravity) off center


3. Y


ou are operating a liftboat. When beginning to jack down you should


______.


A. jack down one leg at a time


B. jack up first, then down


先顶起再往下压



C. undog doors to the engine room


D. assemble all personnel on the main deck


4. After jacking down your liftboat you have an unexpected list. Y


ou find


that the only cause of this list must be a flooded leg. Y


our next course of


action should be to ______.


A. jack the vessel back up to a safe height


将船舶顶回到一个安全的

directly-risen


directly-risen


directly-risen


directly-risen


directly-risen


directly-risen


directly-risen


directly-risen



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