The catenary in a towline is（）.

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• In a typical fuel system, the oil is stored in （） in the double bottom.

  A . setting tanks B . service tanks C . tanks D . drain tank

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• Cable tension for catenary calculations is taken at the（）.

  A . chain locker B . fairlead C . anchor D . contact point of chain with seabed

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• The best method to secure a towline to bitts is to（）.

  A . take a round turn on the bitt farthest from the pull and use figure-eights B . take a round turn on the bitt closest to the pull and use figure-eights C . use figure-eights and take a round turn at the top of the bitts D . use only figure-eight

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• To reduce the amount of catenary you may（）.

  A . shorten the hawser or increase the tug's speed B . lengthen the hawser or reduce the tug's speed C . place your tug in irons D . make a sharp tur

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• It is good practice to use long towlines for ocean tows because the（）.

  A . wear on the towline is equalized B . weight of the towline increases the towing force C . dip in the towline absorbs shock loads D . danger of overriding is reduced

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• A towline should be fastened to（）.

  A . the chocks at the bow of a towed vessel B . the most forward，centermost point of a towed vessel such as a sturdy bow rail C . the mast of a towed sailboat D . a secure fitting near the bow of the towed vessel

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• A vessel which is being assisted by an icebreaker should indicate that she is ready to cast off the towline by（）.

  A . displaying code letter Y (Yankee) B . sounding five short blasts on his whistle C . displaying code numeral 5 D . sounding one prolonged blast on his whistle

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• You have a large，broken-down vessel in tow with a wire rope and anchor cable towline. Both vessels have made provision for slipping the tow in an emergency; however，unless there are special circumstances（）.

  A . the towing vessel should slip first B . the vessel towed should slip first C . they should slip simultaneously D . either vessel may slip first

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• In securing a towing cable，consideration must be given to letting go in an emergency. The possible whip of towlines when released can be overcome by（）.

  A . increasing the shaft RPM prior to release B . using a pelican hook for quick release C . using preventers D . using a short chain for the lead through the stern chock

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• A tow that veers to the side on the end of the towline is said to（）.

  A . yaw B . surge C . sway D . swing

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• Nylon rope is often used in the makeup of a towline because it（）.

  A . floats B . stretches C . handles easily D . resists rot

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• You have been towing astern and have just let go the tow.Your deckhands are pulling in and faking the towline by hand on the stern.The most dangerous action to take is to（）.

  A . continue ahead at slow speed B . continue ahead at half speed C . stop your engines D . back down on your engine

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• Towlines should be inspected for chafing where the towline（）.

  A . passes over the stern of the towing vessel B . passes through chocks C . is attached to the disabled vessel D . All of the above

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• A large change in ambient temperature, or using an oil of a viscosity different from the one recommended by the manufacturer in a mechanical hydraulic governor, will result in the need to adjust the （）.

  A . pilot valve opening B . compensating needle valve C . compensating spring tension D . accumulator spring tensio

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• 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

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• A term used to describe the dip in a towline that acts as a shock absorber is（）.

  A . catenary B . step C . shock dip D . bight

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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 bow B . trim the tow by the stern C . list the tow to windward D . adjust the length of the towing bridle

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• The disadvantage of using a heaving line to pass a towline is that（）.

  A . it increases the likelihood of collision between the towing vessel and the disabled vessel B . recreational boaters tend to make the heaving line fast to the towed vessel as if it were the towline C . the monkey fist may injure someone D . it may reduce the catenary and increase yawing

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• Once a towline is connected between the towing vessel and the disabled vessel，the towing vessel should（）.

  A . not exceed bare steerageway during the transit B . take a strain as soon as you can to control the tow C . come up to speed very slowly and maintain a safe speed D . come up to speed quickly，then cut back power considerably to ease the strai

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• In the Elizabethan Age, a yellow flag would be raised for a tragedy in the theatre before the performance started.

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• When should you conduct a visual inspection of your towline？

  A.Whenever its serviceability is in doubt B.In accordance with the manufacturer's recommendation C.At least once a month D.All of the above

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• 4、翻译句子，注意斜体字的词类转换。 A continuous increase in the temperature of a gas confined in a container will lead to a continuous increase in the internal pressure within the gas.

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