increase fatigue life of the system
reduce the time to retrieve the line
increase the holding power
reduce the catenary
第1题:
Vessels lying afloat at buoys for more than 24 hours should use anchor chain for ______ and insurance wire for ______.
A.bow mooring/stern line
B.forward spring/after spring
C.forward breast rope/forward spring
D.slip rope/stern line
第2题:
Where do fatigue failures of wire rope mooring lines usually occur ________.
A.In the middle part of the line length
B.Near the socketed end fitting adjacent to the anchor
C.At the point where the line touches the bottom
D.At the place the anchor buoy is attached to the line
第3题:
One advantage of chain over wire rope for a tow bridle is that chain ______.
A.is better suited for inland towing
B.resists damage from chafing
C.handles more easily
D.equalizes towing forces better
第4题:
Given the same water depth and line tension, the holding power of a 19 pound / foot wire rope mooring system in comparison to the holding power of a 90 pound / foot chain mooring system will be ______.
A.weaker
B.equal
C.greater
D.Indeterminable
第5题:
A mooring line is described as being 6x24, 1-3/4 inch wire rope. What do the above numbers refer to ? ______.
A.Strands, yarns, circumference
B.Strands, wires, diameter
C.Wires, yarns, diameter
D.Strands, circumference, wires
第6题:
Which statement is TRUE about the use of a“gob rope”________.
A.The gob rope is a mooring line for tying up lighters for working cargo alongside a vessel anchored in an open roadstead
B.The gob rope is used to secure the towline aft over the centerline of a tug
C.The gob rope is a line hung over a vessel's side to assist in boarding
D.The gob rope is a rope used in mooring a vessel to a buoy
第7题:
Which molten substance is poured into the basket of a wire rope socket being fitted to the end of a wire rope ________.
A.Babbitt
B.Bronze
C.Lead
D.Zinc
第8题:
A chain bridle is preferable to a wire rope towing bridle on a long ocean tow because chain ______.
A.is more flexible and has the ability to absorb shock because of its weight
B.is less subject to wear and damage from abrasion
C.requires little maintenance
D.All of the above
第9题:
Chafing gear should be placed______.
A.at all wearing points of mooring lines
B.around running rigging
C.on wire rope only forces
D.at the bitter ends of all standing rigging
第10题:
In a combination chain and wire rope mooring system, the anchor chain is deployed at the anchor end of the line to ______.
A.increase fatigue life of the system
B.reduce the time to retrieve the line
C.increase the holding power
D.reduce the catenary