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单选题
In towing，chocks are used to（）.
A
protect the towline from chafing
B
secure the end of the towline on the tug
C
stop off the towline while retrieving it
D
absorb shock loading on the towline
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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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A tug is best positioned for towing and maneuvering on rivers and other restricted waters where wave action is limited when ______.A.directly astern and pushing the towB.towing on a hawserC.towing alongside and parallel to the vessel it is towingD.towing on the hip
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A vessel towing astern in an operation which severely restricts the towing vessel and her tow in their ability to change course shall，when making way，exhibit ______.A.the masthead lights for a towing vesselB.the lights for a vessel restricted in its ability to maneuverC.sidelights，stern light and towing lightD.All of the above
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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
考题
单选题When towing astern，increased catenary will（）.A
increase control of the towB
prevent the towing vessel from going in ironsC
make the towing vessel less maneuverableD
reduce shock stress on the towing hawser
考题
单选题The knot at the end of the heaving line used to pass the towing hawser is called a（）.A
monkey's fistB
ball or baseball knotC
heaving knotD
three strand Turk's head
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单选题A vessel towing astern in an operation which severely restricts the towing vessel and her tow in their ability to change course shall，when making way，exhibit（）.A
the masthead lights for a towing vesselB
the lights for a vessel restricted in its ability to maneuverC
sidelights，stern light and towing lightD
All of the above
考题
单选题A vessel towing a barge astern would show，at the stern（）.A
only a stern lightB
a towing light above the stern lightC
two towing lights in a vertical lineD
two white lights in a vertical line
考题
单选题In astern towing，a tow span，also called the tow bar or towing arch，is used to（）.A
insure that the hawser leads directly aft as it passes over the stern of the towing vesselB
increase the stability of the towing vessel by raising the hawser off the deckC
reduce chafing of the towing hawserD
prevent fouling of the hawser on deck gear located on the stern of the towing vessel
考题
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
None of the above
考题
单选题What is used to prevent twisting of a towing bridle?（）A
A bittB
A bulkheadC
A V-springD
A fishplate
考题
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A vessel，which does not normally engage in towing operations，is towing a vessel in distress.She（）.A
need not show the lights for a vessel engaged in towing，if it is impractical to do soB
may show the lights for a vessel not under commandC
must show a yellow light above the stern lightD
must show the lights for a vessel towing
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A towing vessel is tripped when（）.A
it is overtaken by the towB
it is pulled sideways by the towC
the weight of the towing hawser causes loss of maneuverabilityD
the propeller is fouled by the 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
考题
单选题A vessel towing astern in an operation which severely restricts the towing vessel and her tow in their ability to change course shall，when making way，exhibit（）.A
the masthead lights for a towing vesselB
the lights for a vessel restricted in its ability to maneuverC
sidelights，sternlight and towing lightD
All of the above
考题
单选题A power-driven vessel，when towing astern，shall show（）.A
two towing lights in a vertical lineB
a towing light in a vertical line above the sternlightC
two towing lights in addition to the sternlightD
a small white light in lieu of the sternlight
考题
单选题Point Judith Harbor of Refuge（）.A
is used mostly by towing vesselsB
has a maximum depth of 14 feet (4.3 meters) at MHWC
West Gap has a controlling depth of 24 feetD
is entered through the East Gap or the West Gap
考题
单选题To clean a dirty fiber towing hawser used in ocean towing，you should（）.A
use lye or other mild detergentB
wash it with fresh water，dry and store itC
wash it with salt waterD
use cleaning fluid on nylon，dacron and other synthetic lines
考题
单选题A towing vessel and her tow are severely restricted in their ability to change course. When making way，the towing vessel will show ONLY（）.A
the masthead lights for a towing vesselB
the lights for a vessel restricted in her ability to maneuverC
sidelights，stern light，and towing lightD
All of the above
考题
单选题The knot used to join two lines or two large hawsers for towing is called a（）.A
square knotB
carrick bendC
sheet bendD
bowline
考题
单选题Fittings used for towing must be（）.A
Coast Guard approvedB
stamped with maximum working loadsC
securely fastenedD
positioned exactly at the bow of the towed vessel
考题
单选题A towing vessel should be on the crest of a wave at the same time as its tow and in the trough at the same time. The term used to describe this is（）.A
tow strainB
catenary lengthC
being in stepD
Williamson's Tow
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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