航海英语船舶操纵基本知识章节练习(2018.02.18)

单项选择题
Catenary as applied to tow lines denotes the（）.
A.dip of the line
B.stretch of the line
C.strain on the line
D.length of the line
单项选择题
The catenary（）.
A.acts as a reserve length of towing hawser when the tug applies more power，and it dampens the surge effect of the tow
B.gives an approximation of the amount of strain on the towing hawser
C.is the dip in the towing hawser between the tug and the tow
D.All of the above
单项选择题
The condition where a ship on the end of a tow line is riding a wave crest at the same time as its tug rides a wave crest is known as riding in（）.
A.synchronism
B.harmony
C.check
D.step
单项选择题
If the towing bridle legs are not of equal length（）.
A.excessive strain is placed on the shorter leg
B.the shorter leg may fail
C.the longer leg is slack
D.All of the above
单项选择题
A vessel is equipped with a single right-handed screw. With rudder amidships and calm wind，the vessel will most likely back（）.
A.straight astern
B.to port
C.to starboard
D.in no particular direction
单项选择题
If a towing vessel and her tow are severely restricted in their ability to change course，they may show lights in addition to their towing identification lights. These additional lights may be shown if the tow is（）.
A.pushed ahead
B.towed alongside
C.towed astern
D.Any of the above
单项选择题
If you are the stand-on vessel in a crossing situation，you may take action to avoid collision by your maneuver alone. When may this action be taken?（）.
A.At any time you feel it is appropriate
B.Only when you have reached extremis
C.When you determine that your present course will cross ahead of the other vessel
D.When it becomes apparent to you that the give-way vessel is not taking appropriate action
单项选择题
A twin-screw vessel can clear the inboard propeller and maneuver off a pier best by holding a(n)（）.
A.forward spring line and going slow ahead on the inboard engine
B.after spring line and going slow astern on the outboard engine
C.forward spring line and going slow ahead on both engines
D.forward spring line and going slow ahead on the outboard engine
单项选择题
When towing astern，one way to reduce yawing of the tow is to（）.
A.trim the tow by the stern
B.trim the tow by the head
C.have the tow on an even keel
D.list the tow on the side it is yawing
单项选择题
In twin-screw engine installations while going ahead，maneuvering qualities are most effective when the tops of the propeller blades both turn（）.
A.to starboard
B.outboard from the center
C.to port
D.inboard toward the center