《11规则》题库第三章航海气象测试题

1、11规则题库第三章航海气象测试题基本信息：矩阵文本题 *姓名：_学号：_1. After a cold front passes，the barometric pressure _. 单选题 *Drops，and the temperature dropsDrops，and the temperature risesRises，and the temperature drops(正确答案)Rises，and the temperature rises2. Which of the following fogs can last long? 单选题 *advection(正确答案)radiati

2、onadvection-radiationother fog3. AT 221200UTC, _ 60 NORTH 25WEST 969 EXPECTED 70 NORTH02 EAST 958 BY 231200UTC 单选题 *HIGHLOW(正确答案)COLD FRONTWARM FRONT4. An air mass is termed warm if _. 单选题 *70Fpassing over ground colder air(正确答案)high pressure and low pressurelow pressure5. _ is a type of fog occurri

3、ng close to the sea surface when the air is dry and cold-probably at least 9 below the sea surface temperature. 单选题 *MIXING FOGADVECTION FOGRADIATION FOGARCTIC SEA SMOKE(正确答案)6. Neap tides occur _. 单选题 *At the start of spring，when the Sun is nearly over the equatorOnly when the Sun and Moon are on t

4、he same sides of the Earth and are nearly in lineWhen the Sun and Moon are at approximately 90，as seen from the Earth(正确答案)When the Sun，Moon，and Earth are nearly in line，regardless of alignment order7. As the tide makes the water _ twice a day a resulting current, or tidal stream, is generated. 单选题

5、*rising and fallingRose and fellthe rise and fallrise and fall(正确答案)8. Clouds appearing in the following order: cirrus, cirrostratus, altostratus, stratus, and nimbostratus usually indicate the approach of a(n) _. 单选题 *warm front(正确答案)occluded frontmedium frontcold front9. Cumulonimbus clouds are mo

6、st likely to accompany a(n) _.单选题 *high pressure systemcold front(正确答案)warm frontoccluded front10. When visibility is reduced to about 5 miles，we say that visibility is _.单选题 *very goodgoodpoormoderate(正确答案)11. What occurs when rising air cools to the dew point? 单选题 *Advection fog formsHumidity decr

7、easesWinds increaseClouds form(正确答案)12. In the North Hemisphere northerly wind causes _temperature. 单选题 *falling(正确答案)risingsameconstant13. The winds you would expect to encounter in the North Atlantic between latitude 5 and 30 are known as the_.单选题 *doldrumswesterliestrades(正确答案)easterlies14. The t

8、emperature at which the air is saturated with water vapor and below which condensation of water vapor will occur is referred to as the_ .单选题 *precipitation pointvapor pointdew point(正确答案)absolute humidity15. The dense black cumulonimbus clouds surrounding the eye of a hurricane are called .单选题 *spir

9、al rainbandscloud walls(正确答案)funnel cloudscyclonic spirals16. _ are mainly caused by the gravitational pull of the moon. 单选题 *Tides(正确答案)SeaSwellWind17. _ refers to the amount of water vapor in the air.单选题 *Humidity(正确答案)TemperaturePrecipitationWind18. A katabatic wind blows _. 单选题 *up an incline du

10、e to surface heatingin a circular patterndown an incline due to cooling of the air(正确答案)horizontally between a high and a low pressure area19. INTERTROPICAL CONVERGENCE ZONE OVER SOUTH PHILIPPINE PASSING OVER MINDANAO NORTHERN SULU AND PALAWAN. This paragraph is likely to be under the heading of .单选

11、题 *GALE WARNING24 HOURS FORECASTSYNOPSIS(正确答案)STORM WARNING20. Anticyclones are usually characterized by _. 单选题 *dry，fair weather(正确答案)high winds and cloudinessgustiness and continuous precipitationovercast skies21. _ moving rather quickly east expected 150 miles south of Cape Farewell 972 by 160000

12、 GMT 单选题 *Developed lowDeveloping low(正确答案)Being developed lowLow to be developed22. A tsunami is caused by a/an .单选题 *tidal wavestorm surge caused by a hurricane or tropical stormearthquake on the oceans floor(正确答案)tornado23. That half of the hurricane to the right hand side of its track (as you fa

13、ce the same direction that the storm is moving) in the Northern Hemisphere is called the _.单选题 *windward sideleeward sidesafe semicircledangerous semicircle(正确答案)24. Radiation fog is more common encountered in_.单选题 *springlater winterautumn(正确答案)end of summer25. The Benguela Current flows in a _. 单选

14、题 *SWly direction along the NW coast of AfricaSly direction off the East Coast of AustraliaNWly direction along the SW coast of Africa(正确答案)SWly direction along the SE coast of Greenland26. A cyclone in its final stage of development is called a（n）_.单选题 *TornadoAnticycloneOccluded cyclone or occlude

15、d front(正确答案)Polar cyclone27. On a weather map, a large letter “H” means_. 单选题 *a high pressure area with cool, dry air, and fair weather(正确答案)a high pressure area with warm, moist air, and inclement weatherhorse latitudes , with rough seas and strong windsa heavy squall line near the “H”28. In the

16、Southern Hemisphere winds in a low pressure system rotate in a _. 单选题 *clockwise direction(正确答案)northeasterly directionnortherly directioncounterclockwise direction29. The passing of a low pressure system can be determined by periodically checking the _. 单选题 *thermometerhygrometerbarometer(正确答案)anem

17、ometer30. A frontal thunderstorm is caused by .单选题 *pronounced local heatingwind being pushed up a mountaina warm air mass rising over a cold air mass(正确答案)an increased lapse rate caused by advection of warm surface air31. On the pole side of trade wind belt, there is an area of high pressure with w

18、eak pressure gradients and light, variable winds. This area is called the _.单选题 *prevailing westerliesgeostrophic windsdoldrumshorse latitudes(正确答案)32. In the doldrums you can expect_. 单选题 *steady, constant windsfrequent rain showers and thunderstorms(正确答案)steep pressure gradientslow relative humidi

19、ty33. The speed at which a storm centre moves is the _. 单选题 *speed of movementspeed of advance(正确答案)speed of stormstorm movement speed34. What is the distance from the bottom of a wave trough to the top of a wave crest? 单选题 *Wave lengthWave height(正确答案)Wave breadthWave depth35. A _ is created kri:et

20、d by a pressure gradient or slope in the water level. 单选题 *gradient current(正确答案)density currentswift currenttorrent current36. Fog is likely to occur when there is little difference between the dew point and the _ .单选题 *relative humidityair temperature(正确答案)barometric pressureabsolute humidity37. W

21、hat is the tidal height? 单选题 *Twice the tide amplitudeThe range of the tideThe water above the Lowest Astronomical Tide(正确答案)The height above or under the mean level38. _ FORCE 12 WINDS EXPECTED IN EAST NORTHERN SECTION AND WEST NORTHER SECTION. 单选题 *MODETATEGALESTORMHURRICANE(正确答案)39. On the approa

22、ch of a warm front the barometric pressure usually _. 单选题 *falls(正确答案)risesis steadyis unreliable40. The two most effective generating forces of surface ocean currents are _. 单选题 *temperature and salinity differences in the water(正确答案)wind and density differences in the waterwater depth and underwat

23、er topographyrotation of the Earth and continental interference41. What kind of condition would you observe as the eye of a storm passes over your ships position? 单选题 *Huge waves approaching all directions, clearing skies, light winds, and an extremely low barometer.(正确答案)Flat calm seas, heavy rain,

24、 light winds, and an extremely low barometer.Flat calm seas, heavy rain, light winds, and high pressure.Huge waves approaching from all directions, clearing skies, light winds, and high pressure.42. In the Northern Hemisphere，when the wind at your location is northerly，the low pressure center causin

25、g the wind is located to your _. 单选题 *NNWWSWESE(正确答案)SSW43. There are often three parts in a weather report, not including _单选题 *warninggeneral synopsisforecasttraffic density(正确答案)44. Clouds are classified according to their _. 单选题 *sizemoisture contentaltitude and how they were formed(正确答案)locatio

26、n in a front45. _ LOW ELY SLWLY WITH COLD FRONT FM CEN TO 12N 179W AND WARM FROM FM CEN TO 11N 171W. 单选题 *SHLW(正确答案)SCTDOBSSW46. The movement of water away from the shore or downstream is called a（n）_. 单选题 *reversing currentebb current(正确答案)flood currentslack current47. Which of the following is not

27、 a form of precipitation？ 单选题 *RainFrost(正确答案)SleetSnow48. High pressure ridge _ from Sevastopol to eastern Libya. 单选题 *reachingextending(正确答案)increasingupgrading49. According to Buys Ballots law，when an observer in the Northern Hemisphere experiences a northwest wind，the center of low pressure is l

28、ocated to the _. 单选题 *northeast(正确答案)west-southwestnorthwestsouth-southeast50. How much time can be saved by use of weather routeing? 单选题 *2%4%6%Impossible to say(正确答案)51. In many areas atoll clouds (clouds of vertical development) are produced over small islands. These are the result of _.单选题 *risi

29、ng air currents produced by the warm islands(正确答案)warm air from the sea rising over higher land areascool land air mixing with warm sea airdescending air over the islands52. Especially in adverse weather，risk of collision with an offshore supply vessel increases when the vessel is moored to what sid

30、e of the unit? 单选题 *Upwind(正确答案)DownwindCrosswindDowncurrent53. The set of the current is the _. 单选题 *speed of the current at a particular timemaximum speed of the currentdirection from which the current flowsdirection in which the current flows(正确答案)54. A hygrometer is a device used for determining

31、 _.单选题 *the absolute temperatureatmospheric pressurewind velocityrelative humidity(正确答案)55. Mainly east 3 or 4 partly cloudy to overcast occasional rain _ slowly south moderate or good. 单选题 *spreading(正确答案)proceedingbounding forgoing to56. What danger is presented if a waterspout passes over the shi

32、p? 单选题 *Heavy rain could cause down floodingVisibility could restricted by low cloudsLarge wave could cause structural damage(正确答案)Personnel maybe injured by deck gear blown by the wind57. The tropical cyclone at 15.8N, 132.4E has yesterday afternoon_ into a tropical storm with max winds 70 knots ne

33、ar center.单选题 *upgraded(正确答案)decreasedbecomechanged58. An isotherm is . 单选题 *a line on a weather map connecting equal points of both temperature and pressurean instrument that measures the climatological effects of temperaturea line connecting points of equal barometric pressure on a weather mapa li

34、ne connecting points of equal temperature on a weather map(正确答案)59. The period at high or low water during which there is no apparent change of level is called _. 单选题 *HEIGHTRANGESTAND(正确答案)FALL60. Cyclones that have warm sectors usually move _. 单选题 *westerlyparallel to the isobars in the warm secto

35、r(正确答案)toward the nearest high pressure areafaster than the accompanying cold front61. In the Northern Hemisphere, winds backing sharply from northwest to the west with increasing speed are indications that a_.单选题 *low pressure center is approaching(正确答案)cold front has passedstationary front existsh

36、igh pressure center has passed62. Monsoons are characterized by_.单选题 *light, variable winds with little or no humiditystrong, gusty winds that blow from the same general direction all yearsteady winds that reverse direction semiannually(正确答案)strong, cyclonic winds that change direction to conform to

37、 the passage of an extreme low pressure system63. During the winter months，the southeast trade winds are _.单选题 *stronger than during the summer months(正确答案)weaker than during the summer monthsdrier than during the summer monthswetter than during the summer months64. The set of the ocean current is c

38、aused by _. 单选题 *density differences of the waterrotation of the earthdirection of primary circulation of airAll of the above(正确答案)65. REEF（SOUTH）WIND NORTH 10 KNOTS WEATHER ISOLATED SHOWERS SEA SLIGHT STOP. This phase is a _. 单选题 *Forecast(正确答案)Warningmap analysisgeneral introduction66. _ is a high

39、 layer of cloud in the form of small flakes or cauliflower, white in colour with no dark shadows in between.单选题 *CirrostratusCirrusCirrocumulus(正确答案)Alto-stratus67. Two well-developed high pressure areas may be separated by a _单选题 *hill of low pressuretrough of low pressure(正确答案)valley of low pressu

40、reridge of low pressure68. A boundary between two air masses is a(n)_. 单选题 *lapse rateisobarfront(正确答案)Continent69. If the current and wind are in opposite directions, the sea surface represents _.单选题 *a greatly reduced wind speeda higher wind speed than that really exists(正确答案)a lower wind speed th

41、an what really existsdisturbant wind70. Fog is simply a cloud of minite water droplets that exists at _.单选题 *sea surfaceland surfacealoftground level(正确答案)71. If a hurricane several hundred miles away is moving in your general direction your barometer would _. 单选题 *start to rise rapidlystart to fall

42、 gradually(正确答案)rise slowly, begin pumping and then start a slow, steady fallremain steady72. In most cases , the direction of the apparent wind lies between the bow and_.单选题 *the direction of the true wind(正确答案)true norththe beam on the windward sidethe beam on the lee side73. Radio weather service

43、 is in which volume of Admiralty List of Radio Signals? 单选题 *23(正确答案)5674. The fog most commonly encountered at sea is called . 单选题 *conduction fogradiation fogfrontal fogadvection fog(正确答案)75. During the voyage she encountered boisterous winds and heavy weather during which time the vessel _ heavil

44、y and to such an extent that at times it was necessary to change course. 单选题 *movedlabored(正确答案)drovewent76. _ maybe a warning for an approaching storm.单选题 *The presence of cirrus(正确答案)The low-hanging stratus cloudsThe altocumulus cloudsThe massive cumulus clouds77. Tides are superimposed on non-tid

45、al rising and falling water levels，caused by _. 单选题 *freshetsfloodsriver flowsseismic events(正确答案)78. A microbarograph is a precision instrument that provides a _. 单选题 *charted record of atmospheric temperature over timecharted record of atmospheric pressure over time(正确答案)graphic record of combusti

46、ble gases measured in an atmospheregraphic record of vapor pressure from a flammable/combustible liquid79. A wave entering _ is likely to produce bores. 单选题 *shallow water(正确答案)deep waterrivertide80. You can expect frontal activity when two air masses collide and _单选题 *their barometric pressure as a

47、n temperatures are the samethere are difference in how track along the jet streamthere are no significant differences between their temperature and moisture contentthere are significant differences between the temperature of each air mass(正确答案)81. When a hurricane passes over colder water or land an

48、d loses its tropical characteristics, the storm becomes a(n) _.单选题 *high pressure areaextra-tropical low-pressure system(正确答案)tropical stormeasterly wave82. A hurricane moving northeast out of the Gulf passes west of your position. You could expect all of the following EXCEPT .单选题 *higher than norma

49、l swellshigh windswinds veering from south, through west, to northwestlight showers(正确答案)83. Windward means _.单选题 *direction to winddirection against wind(正确答案)wind directionvariable direction84. Weather forecast messages are usually _.单选题 *given only to TV stationstransmitted only by commercial bro

50、adcast stationsbroadcast in plain language(正确答案)broadcast immediately on VHF Channel 16 and 2182 KHz85. TYPHOON FORECAST MOVE 285 DEG 15 KNOT FIRST 12 HOURS THEN 280 DEG 17 KNOT NEXT 12 HOURS. The movement of the typhoon is in_quadrant.单选题 *NESENW(正确答案)SW86. Haze is not caused by _. 单选题 *forest fire

51、ssmoke from industrial areasdust or sand stormswater droplets with the relative humidity more than 95%(正确答案)87. A tide is called diurnal when _. 单选题 *only one high and one low water occur during a lunar day(正确答案)the high tide is higher and the low tide is lower than usualthe high tide and low tide a

52、re exactly six hours aparttwo high tides occur during a lunar day88. What is the direction of rotation of tropical cyclone, tropical storms and hurricanes in the Northern Hemisphere? 单选题 *Clockwise and outwardCounterclockwise and inward(正确答案)Counterclockwise and outwardClockwise and inward89. A WIND

53、 BLOWS ROUND ANTICLOCKWISE defines . 单选题 *Backing（of wind）(正确答案)Beach（to）Veering（of wind）Maintaining direction of the wind90. _ is formed when the droplets or ice crystals in clouds have become sufficiently large to fall to the ground. 单选题 *HumidityTemperaturePrecipitation(正确答案)Wind91. When crossing a front, isobar tend to _. 单选题 *change from smooth curves within the air mass to sharp bends at the front(正确答案)change from sharp bends within the air mass to smooth curves at the frontpass smoothly across the front with no chang