甲类船长航海英语6050 题库补充50题(8.1操纵)

08.1 船舶操纵基本知识(或见考证题库合集134-138页)[2151]When a vessel navigates in an area with a small underkeel clearance but with adequate space to take avoiding action she ______.A. should not be regarded as a vessel constrained by her draughtB. should be regarded as a vessel constrained by her draughtC. shall be regarded as a vessel restricted in her ability to maneuverD. should be regarded as a non-displacement vessel．KEY: A[2152]When towing astern，one way to reduce yawing of the tow is to ______.A. trim the tow by the sternB. trim the tow by the headC. have the tow on an even keelD. list the tow on the side it is yawingKEY: A[2153]While moving ahead，a twin-screw ship has an advantage over a single-screw ship because ______.A. correct trim will be obtained more easilyB. drag effect will be cancelled outC. side forces will be eliminatedD. speed will be increasedKEY: C[2154]A racetrack turn would be better than a Williamson turn in recovering a man overboard if ______.A. the man has been missing for a period of timeB. the sea water is very cold and the man is visibleC. there is thick fogD. the wind was from astern on the original courseKEY: B[2155]A reaching course is one in which the wind ______.A. comes directly over the bowB. comes directly over the sternC. comes over an area extending from broad on the bow to the quarterD. has no effect on the vesselKEY: C[2156]A towing vessel becomes tripped while towing on a hawser astern. What factor is MOST important when assessing the risk of capsizing?A. Length of the towlineB. Height of the towline connectionC. Longitudinal position of the towline connectionD. Direction of opposing forceKEY: B[2157]A twin screw vessel，making headway with both engines turning ahead，will turn more readily to starboard if you ______.A. reverse port engine，apply right rudderB. reverse port engine，rudder amidshipsC. reverse starboard engine，apply right rudderD. reverse starboard engine，rudder amidshipsKEY: C[2158]A twin-screw ship going ahead on the starboard screw only tends to move ______.A. in a straight lineB. to portC. from side to sideD. to starboardKEY: B[2159]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 engineB. after spring line and going slow astern on the outboard engineC. forward spring line and going slow ahead on both enginesD. forward spring line and going slow ahead on the outboard engineKEY: D[2160]A twin-screw vessel is easier to maneuver than a single-screw vessel because the twin-screw vessel ______.A. permits the rudder to move fasterB. generates more powerC. can turn without using her rudderD. can suck the water away from the rudderKEY: C[2161]A vessel fitted with twin screws is easier in ______ than a vessel with single screw．A. turning maneuverB. course settingC. position fixingD. regulating speedKEY: A[2162]A vessel is considered to be restricted in her ability to maneuver under the Rules if she is ______.A. at anchorB. mine-clearingC. engaged in fishingD. engaged in towingKEY: B[2163]A vessel is equipped with a single right-handed screw. With rudder amidships and calm wind，the vessel will most likely back ______.A. straight asternB. to portC. to starboardD. in no particular directionKEY: B[2164]A vessel that is dead in the water on an even keel with most of her superstructure forward will lay ______.A. A．With the wind abaft the beam or on the sternB. B．With the wind on the beamC. C．With the wind on the bowD. D．With the wind dead aheadKEY: A[2165]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 aboveKEY: D[2166]A vessel travelling down a narrow channel，especially if the draft is nearly equal to the depth of the water，may set off the nearer side. This effect is known as ______.A. smelling the bottomB. squattingC. bank suctionD. bank cushionKEY: D[2167]A vessel which through some exceptional circumstance is unable to maneuver as required by these Rules and is therefore unable to keep out of the way of another vessel is called ______.A. a vessel restricted in her ability to maneuverB. a vessel not under commandC. a vessel engaged in fishingD. a vessel constrained by her draught．KEY: B[2168]A vessel，which is unable to maneuver due to some exceptional circumstance，shall exhibit ______.A. during the day，three balls in a vertical lineB. during the day，three shapes，the highest and lowest being balls and the middle being a diamondC. when making way at night，two all-round red lights，sidelights，and a sternlightD. when making way at night，masthead lights，sidelights，and a sternlightKEY: C[2169]Apparent wind speed blowing across a vessel under tow can be measured by a(n) ______.A. barometerB. wind vaneC. anemometerD. thermometerKEY: C[2170]As a ship moves through the water，it drags with it a body of water called the wake. The ratio of the wake speed to the ship's speed is called ______.A. propeller velocityB. speed of advanceC. wake distributionD. wake fractionKEY: D[2171]As a vessel falls off the wind from close-hauled to a beam reach，the tendency for the vessel to move sideways through the water will ______.A. increaseB. decreaseC. change only if the vessel comes about on the opposite tackD. not changeKEY: B[2172]At night，a vessel shall indicate that she is restricted in her ability to maneuver by showing in a vertical line two ______.A. red lightsB. red lights and two white lightsC. red lights with a white light in betweenD. white lights with a red light in betweenKEY: C[2173]Besides saving distance along the track line，another advantage of the Scharnow Turn over the Williamson Turn in a man overboard situation because ______.A. it is fasterB. it can be used in both the immediate action and the delayed action situationsC. in fog，if the turn is started as soon as the man goes over，the vessel will be at the point where hewent over when the turn is completedD. it returns the vessel to the original track line on a reciprocal courseKEY: A[2174]Catenary as applied to tow lines denotes the ______.A. dip of the lineB. stretch of the lineC. strain on the lineD. length of the lineKEY: A[2175]Changing direction by bringing the stern of the vessel through the eye of the wind is known as ______.A. jibingB. running before the windC. tackingD. reefingKEY: A[2176]For the deepest water when rounding a bend in a river，you should navigate your vessel ______.A. toward the inside of the bendB. toward the outside of the bendC. toward the center of the river just before the bend，then change course for the river's center after the bendD. in the river's centerKEY: B[2177]How does the effect known as bank suction act on a single-screw vessel proceeding along a narrow channel? ______.A. It pulls the bow toward the bank.B. It pushes the entire vessel away from the bank.C. It pulls the stern toward the bank.D. It heels the vessel toward the bank.KEY: C[2178]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 aheadB. towed alongsideC. towed asternD. Any of the aboveKEY: D[2179]If a vessel under tow starts jumping on its tow line，the most appropriate action to alleviate the condition is to ______.A. change courseB. slow downC. heave toD. adjust tow line lengthKEY: D[2180]If the towing bridle legs are not of equal length ______.A. excessive strain is placed on the shorter legB. the shorter leg may failC. the longer leg is slackD. All of the aboveKEY: D[2181]If the towline parts，you should ______.A. start towing by pushing aheadB. abandon the towing vesselC. retrieve the tow bridleD. relieve strain on the retrieving lineKEY: C[2182]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 appropriateB. Only when you have reached extremisC. When you determine that your present course will cross ahead of the other vesselD. When it becomes apparent to you that the give-way vessel is not taking appropriate actionKEY: D[2183]In a following sea，a wave has overtaken your vessel and thrown the stern to starboard. To continue along your original course，you should ______.A. use more right rudderB. use more left rudderC. increase speedD. decrease speedKEY: A[2184]In ballasting to survival draft，while in transit，due to extreme wind and wave loads，thrusters or propulsion，if available，should be used to ______.A. reduce windward mooring tensionsB. maintain vessel headingC. maximize accelerationsD. increase speed of advanceKEY: B[2185]In order for a vessel to be engaged in fishing she must be ______.A. underwayB. using gear which extends more than 50 meters outboardC. using a seine of some typeD. using gear which restricts her maneuverabilityKEY: D[2186]In order to back a right-handed，single-screw vessel in a straight line，you will probably need to use ______.A. very little rudderB. some left rudderC. some right rudderD. full left rudderKEY: C[2187]In towing it is desirable for the tug and the vessel to ride wave crests simultaneously because ______.A. shock loading on the tow line is reducedB. towing speed is improvedC. the vessel is more visible from the tugD. the catenary of the tow line is reducedKEY: A[2188]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 throwersKEY: B[2189]In twin-screw engine installations while going ahead，maneuvering qualities are most effective when the tops of the propeller blades both turn ______.A. to starboardB. outboard from the centerC. to portD. inboard toward the centerKEY: B[2190]It is easier to dock a right-hand，single-screw vessel ______.A. starboard side to the wharfB. either side to the wharfC. port side to the wharfD. stern to the wharfKEY: C[2191]Most of your vessel's superstructure is forward. How will the vessel lie when drifting with no way on? ______.A. With the wind from aheadB. With the wind off the port beamC. With the wind off the starboard beamD. With the wind from abaft the beamKEY: D[2192]Once a towline is connected between the towing vessel and the disabled vessel，the towing vessel should ______.A. not exceed bare steerageway during the transitB. take a strain as soon as you can to control the towC. come up to speed very slowly and maintain a safe speedD. come up to speed quickly，then cut back power considerably to ease the strainKEY: C[2193]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. handles more easilyD. equalizes towing forces betterKEY: B[2194]One major advantage of the round turn maneuver in a man overboard situation is that it ______.A. is the fastest methodB. is easy for a single-screw vessel to performC. requires the least shiphandling skills to performD. can be used in reduced visibilityKEY: A[2195]The best method to secure a tow line to a cleat is to ______.A. take a turn around the cleat，then figure-eights，and a half-hitchB. make figure-eights，followed by a half-hitch，then a figure-eight knotC. take a turn，a half turn，and a figure-eightD. take several turns around the cleat onlyKEY: A[2196]The biggest problem you generally encounter while towing a single tow astern is ______.A. the catenary dragging on the bottomB. swamping of the towC. the tow tending to diveD. yawKEY: D[2197]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. All of the aboveKEY: D[2198]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. synchronismB. harmonyC. checkD. stepKEY: D[2199]The distance that a vessel travels from the time that the order to put engines full astern until the vessel is dead in the water is known as ______.A. advanceB. head reachC. surgeD. transferKEY: B[2200]The effect known as bank cushion acts in which of the following ways on a single-screw vessel proceeding along a narrow channel?A. It forces the bow away from the bank.B. It forces the stern away from the bank.C. It forces the entire vessel away from the bank.D. It heels the vessel toward the bank.KEY: A。