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单选题
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
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An ocean towing bridle whose legs are of equal length，but too short，may ______.A.fail to provide spring in the hawserB.cause unequal distribution of the load to one legC.cause the bridle legs to jump clear of the chocks or fairleadsD.None of the above
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The choice of length of tow bridle legs is governed by the ______．A.Expected towing forcesB.Capability of retrieving gearC.Freeboard of the unit being towedD.Need to reduce yaw
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A tow astern is veering from side to side on its towline．The best way of controlling the action is to ______．A.Trim the tow by the bowB.Trim the tow by the sternC.List the tow to windwardD.Adjust the length of the towing bridle
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A bridle for an ocean tow consists of ______.A.two chains of equal lengthB.a single nylon pendant rove through a heavy ring free to move on the pendantC.two long legs of wire rope shackled to a fishplateD.a single length of heavy chain with both ends secured on deck to welded pad eyes
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A chain bridle is used when towing astern because it ______.A.is easy to connectB.provides an effective catenary and absorbs shock due to its weightC.makes rigging a swivel unnecessaryD.prevents the tow from yawing by the drag of the chains in a seaway
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单选题When towing，what is the main reason for using a chain bridle on a wire hawser（）.A
It makes for an easy connectionB
It gives a spring effect to cushion the shockC
It eliminates the necessity of a swivelD
It does not chafe
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单选题One advantage of chain over wire rope for a tow bridle is that chain（）.A
is better suited for inland towingB
resists damage from chafingC
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单选题An ocean towing bridle should（）.A
have equal legs of sufficient lengthB
have a large angle between the legsC
be formed on a bight of cable through a ringD
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单选题The choice of length of tow bridle legs is governed by the（）.A
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单选题You see a vessel carrying a black diamond which indicates a（）.A
vessel towing asternB
barge pushed aheadC
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问答题A rectangle is equal in area to a square with sides of length 12. Is the diagonal of the rectangle greater in length than 20? (1) The rectangle has a length of 16. (2) The rectangle has a width of 9.
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单选题A bridle for an ocean tow consists of（）.A
two chains of equal lengthB
a single nylon pendant rove through a heavy ring free to move on the pendantC
two long legs of wire rope shackled to a fishplateD
a single length of heavy chain with both ends secured on deck to welded pad eyes
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单选题On a long ocean tow，the bridle should be made up of two equal lengths of（）.A
chainB
wireC
nylonD
manila
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单选题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 towB
gives an approximation of the amount of strain on the towing hawserC
is the dip in the towing hawser between the tug and the towD
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考题
单选题The biggest problem encountered when towing bridle legs are too short is（）.A
retrievalB
adjusting tensionC
excessive strainD
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单选题An ocean towing bridle whose legs are of equal length，but too short，may（）.A
fail to provide spring in the hawserB
cause unequal distribution of the load to one legC
cause the bridle legs to jump clear of the chocks or fairleadsD
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单选题What is used to prevent twisting of a towing bridle?（）A
A bittB
A bulkheadC
A V-springD
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单选题A chain bridle is used when towing astern because it（）.A
is easy to connectB
provides an effective catenary and absorbs shock due to its weightC
makes rigging a swivel unnecessaryD
prevents the tow from yawing by the drag of the chains in a seaway
考题
单选题The MINIMUM acceptable size for a towing bridle would be that size in which the safe working load (SWL) of each leg of the bridle is equal to（）.A
one-half the SWL of the main towing hawserB
three-fourths the SWL of the main towing hawserC
that of the main towing hawserD
twice that of the main towing hawser
考题
单选题In towing，heaving lines are used for（）.A
passing a tow bridle to the tugB
passing a messenger lineC
heaving in the tow bridleD
service lines with rocket line throwers
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单选题Which will NOT reduce yawing of a tow?（）A
Increasing the length of the towing hawserB
Trimming the tow by the bowC
Trimming the tow by the sternD
Drogues put over the stern
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单选题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 weightB
is less subject to wear and damage from abrasionC
requires little maintenanceD
All of the above
考题
单选题A tow astern is veering from side to side on its towline. The best way of controlling the action is to（）.A
trim the tow by the bowB
trim the tow by the sternC
list the tow to windwardD
adjust the length of the towing bridle
考题
单选题As seen from the tow，what should connect the leading ends of both towing bridle legs to the main towing hawser?（）A
A cable clampB
A fishplate，flounder，or towing plateC
A pad eyeD
The towing bitts
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