nuaa气象学教材习题

习题Chapter 1 ATMOSPHERE AND TEMPERATURE1. Which feature is associated with the tropopause?A. Absence of wind and turbulence.B. Absolute upper limit of cloud formation.C. Abrupt change of temperature lapse rate.2. What is a characteristic of the troposphere?A. It contains all the moisture of the atmosphere.B. There is an overall decrease of temperature with an increase of altitude.C. The average altitude of the top of the troposphere is about 6 miles.3. The average height of the troposphere in the middle latitudes isA. 20,000feet.B. 25,000feet.C. 37,000feet.4. The primary cause of all changes in the Earth’s weather isA. variation of solar energy received by the Earth’s regions.B. changes in air pressure over the Earth’s surface.C. movement of the air masses.5. If the air temperature is +8 ℃ at an elevation of 1,350 feet and a standard (average) temperature lapse rate exists, what will be the approximate freezing level?A. 3,350 feet MSL(Mean Sea Level)B. 5,350 feet MSLC. 9,350 feet MSL6. The most frequent type of ground or surface based temperature inversion is that produced byA. ground radiation on a clear, cool night, when the wind is light.B. warm air being lifted rapidly aloft in the vicinity of mountainous terrain．C. the movement of colder air under warm air, or the movement of warm air over coldair.7. What feature is associated with a temperature inversion?A. A stable layer of air.B. An unstable layer of air.C. Air mass thunderstorms.8. What are the characterizes of a ground-based inversion?A. Convection currents at the surface.B. Cold temperatures.C.Poor visibility.9. Where is a common location for an inversion of the atmosphere?A. At the tropopause.B. In the stratosphere.C. At the base of cumulus clouds.10. Which weather conditions should be expected beneath a low-level temperature inversion layer when the relative humidity is high?A. Smooth air and poor visibility due to fog, haze, or low clouds.B. Light wind shear and poor visibility due to haze and light rain.C. Turbulent air and poor visibility due to fog, low stratus-type clouds, and showeryprecipitation11.对流层中，对天气变化影响较大的气体是：A.氮气和氧气B.氧气和二氧化碳C.二氧化碳和水汽D.水汽和臭氧12.对流层顶是一个强大的稳定层，因为：A. 它的上面是平流层B. 空气干洁，能见度好C. 气流平稳，没有对流运动 D 该处气温直减率小13.在对流层顶以上飞行，常常是：A. 气流平稳，能见度好B. 有尘粒、烟粒等杂质聚积C. 会遇到高云，或积雨云、浓积云顶D. 有使飞机产生颠簸的扰动气流14.局地气温的最低点通常出现在：A. 后半夜B. 天亮时C. 早晨D. 日出时15.能造成较大气温日较差的有利天气和地理条件分别是：A.晴天，陆地B.晴天，海洋C.阴天，陆地D.阴天，海洋16.局地气温的非周期变化受下列那一个因素的影响最显著？A.太阳辐射强度B.海陆分布C.季节D.冷暖空气的水平运动17.标准大气的海平面气温等于：A. 0℃B. 10℃C. 273.16ＫD. 288.16Ｋ18.气压相等时，较暖和较湿的空气密度分别比较冷和较干的空气密度要A. 小，小B. 大，大C. 小，大D. 大，小Answers:1.C2.B3.C4.A5.B6.A7.A8.C9.B 10.A 11.C 12.D 13.A 14.D 15.A 16.D 17.D 18.A习题Chapter 2 ATMOSPHERIC PRESSURE AND ALTIMETRY1. Which pressure is defined as station pressure?A. Altimeter setting.B. Actual pressure at field elevation.C. Station barometric pressure reduced to sea level.2. What term describes an elongated area of low pressure?A. Trough.B. Ridge.C. Hurricane or typhoon.3. If the ambient temperature is colder than standard at FL 310, what is the relationship between true altitude and pressure altitude?A. They are both the same, 31,000 feet.B. True altitude is lower than 31,000 feet.C. Pressure altitude is lower than true altitude.4. Where is the usual location of a thermal low?A. Over the arctic region.B. Over the eye of a hurricane.C. Over the surface of a dry, sunny region.☆5. En route at FL 270, the altimeter is set correctly. On descent, a pilot fails to set the local altimeter setting of 30.57. If the field elevation is 650 feet, and the altimeter is functioning properly, what will it indicate upon landing?A. 585 feet.B. 1,300 feet.C. Sea level.6. What is corrected altitude (approximate true altitude)?A. Pressure altitude corrected for instrument error.B. indicated altitude corrected for temperature variation from standard.C. Density altitude corrected for temperature variation from standard.7.常用于研究水平气压场的气压是：A. 本站气压B. 场面气压C. 修正海平面气压D. 标准海平面气压8.飞机起降时，用于调整高度表的气压通常是：A 本站气压 B. 场面气压 C. 修正海平面气压 D. 标准海平面气压9.航线飞行时，用来调整高度表的气压是：A. 本站气压B. 场面气压C. 修正海平面气压D. 标准海平面气压10.飞机进入较强下降气流和上升气流区时，高度指示会分别比实际高度：A. 偏高，偏低B. 偏高，偏高C. 偏低，偏高D. 偏低，偏低11.当飞机按气压式高度表保持一定高度飞向低压区时，其实际高度的变化是：A. 逐渐变低B. 逐渐变高C. 先变低，后变高D. 先变高，后变低12.当空气密度低于标准大气时，对飞机的起飞载重量或起飞和着陆滑跑距离的影响分别是：A. 减少，加长B. 减少，缩短C. 增大，加长D. 增大，缩短13.飞机所处位置的密度高度，在冷天和热天通常分别为：A. 低密度高度，高密度高度B. 高密度高度，低密度高度C. 低密度高度，低密度高度D. 高密度高度，高密度高度Answers:1.B2.A3.B4.C5.C6.B7.C8.C9.D 10.A 11.A 12.A 13.A习题Chapter 3 WIND1. At lower levels of the atmosphere, friction causes the wind to flow across isobars into a low because the frictionA. decreases windspeed and Coriolis force.B. decreases pressure gradient force.C. creates air turbulence and raises atmospheric pressure.2. What causes surface winds to flow across the isobars at an angle rather than parallel to the isobars?A. Coriolis force.B. Surface frictionC. The greater density of the air at the Surface.3. What is a feature of air movement in a high pressure area?A. Ascending from the surface high to lower pressure at higher altitudes.B. Descending to the surface and then outward.C. Moving outward from the high at high altitudes and into the high at the surface.4. What is indicated by close spacing of isobars on a weather map?A. Weak pressure gradient and weak windsB. Weak pressure gradient and strong windsC. Strong pressure gradient and strong winds5. Which type wind flows downslope becoming warmer and dryer?A. Land breeze.B. Valley wind.C. Katabatic wind.6. At which location does Coriolis force have the least effect on wind direction?A. At the poles.B. Middle latitudes (30° to 60°).C. At the Equator.7. How does Coriolis force affect wind direction in the Southern Hemisphere?A. Causes clockwise rotation around a low.B. Causes wind to flow out of a low toward a high.C. Has exactly the same effect as in the Northern Hemisphere.8. Which force, in the Northern Hemisphere, acts at a right angle to the wind and deflects it to the right until parallel to the isobars?A. CentrifugalB. Pressure gradient.C. Coriolis9. Which weather condition is defined as an anticyclone?A. Calm.B. High pressure area.C. COL.10. Winds at 5,000 feet AGL on a particular flight are southwesterly while most of the surface winds are southerly. This difference in direction is primarily due toA. a stronger pressure gradient at higher altitudes.B. friction between the wind and the surface.C. stronger Coriolis force at the surface.11. What relationship exists between the winds at 2,000 feet above the surface and the surface winds?A. The winds at 2,000 feet and the surface winds flow in the same direction, but thesurface winds are weaker due to friction.B. The winds at 2,000 feet tend to parallel the isobars while the surface winds crossthe isobars at an angle toward lower pressure and are weaker.C. The surface winds tend to veer to the right of the winds at 2,000 feet and areusually weaker.12. A jet stream is defined as wind ofA. 30 knots or greater.B. 40 knots or greater.C. 50 knots or greater.13. Jet stream winds occur at which location?A. South of highsB. Parallel to troughsC. Breaks in the tropopause14.西北风可表示为：A. 135°或SEB. 300°或NWC. 315°或NWD. 340°或WN15.海上风与陆地风相比，主要区别是：A. 海上风速大，风向与等压线交角大B. 陆地上风速大，风向与等压线交角小C. 陆地上风速大，风向与等压线交角大D. 海上风速大，风向与等压线交角小16.海风和山风分别出现在：A. 白天，晚上B. 晚上，白天C. 白天，白天D. 晚上，晚上17.在北半球9000米高度，由低压区飞向高压区，则航线上吹：A. 右侧风B. 左侧风C. 逆风D. 顺风18.在北半球自由大气中，如果航线是左侧风，则高压区在航线的：A. 右侧B. 左侧C. 后方D. 前方19.自由大气中风随高度变化的主要原因是：A. 气温的水平差异B. 气温随高度的变化C. 气压的水平差异D. 气压随高度的变化20.对流层自由大气中，高度增加，风的一般变化规律是：A. 风向趋近于东风，风速增大B. 风向趋近于西风，风速减小C. 风向趋近于东风，风速减小D. 风向趋近于西风，风速增大21.地面风的阵性表现较明显的时间和季节分别是：A. 早晨，冬季B. 早晨，夏季C. 午后，冬季D. 午后，夏季22.地面风的阵性表现较明显的地区特点是：A. 地表粗糙，性质差异大B. 地表平坦，性质差异小C. 地表粗糙，性质差异小D. 地表平坦，性质差异大Answers:1.A2.B3.B4.C5.C6.C7.A8.C9.B 10.B 11.B 12.C 13.C 14.C 15.D 16.A 17.A 18.C 19.A 20.D 21.D 22.A习题Chapter 4 CLOUD AND PRECIPITATION1. To which meteorological conditioned does the term "dew point "refer?A. The temperature to which air must be cooled to become saturated.B. The temperature at which condensation and evaporation are equal.C. The temperature at which dew will always form.2. The amount of water vapor which air can hold largely depends onA. relative humidity.B. air temperature.C. stability of air3. Clouds, fog, or dew will always form whenA. water vapor condenses.B. water vapor is present.C. the temperature and dew point are equal.4. What weather condition occurs at the altitude where the dewpoint lapse rate and the dry adiabatic lapse rate converge?A. Cloud bases form.B. Precipitation starts.C. Stable air changes to unstable air.5. What are the four families of clouds?A. Stratus, cumulus, nimbus, and cirrus.B. Clouds formed by updrafts, fronts, cooling layers of air, and precipitation into warmair.C. High ,middle, low, and those with extensive vertical development.6. The suffix “nimbus”, used in naming clouds, means aA. cloud with extensive vertical development.B. rain cloud.C. dark massive, towering cloud.7. A high cloud is composed mostly ofA. ozone.B. condensation nuclei.C. ice crystals.8. Stability can be determined from which measurement of the atmosphere?A. Low-level windsB. ambient lapse rateC. atmospheric pressure9. What determines the structure or type of clouds which form as a result of air being forced to ascend?A. the method by which the air is lifted.B. the stability of the air before lifting occurs.C. the amount of condensation nuclei present after lifting occurs.10. Unsaturated air flowing up slope will cool at the rate of approximately (dry adiabatic lapse rate)A. 3℃ per 1000 feet.B. 2℃ per 1000 feet.C. 2.5℃ per 1000 feet.11. What type of clouds will be formed if very stable moist air is forced up slope?A. First stratified clouds and then vertical clouds.B. Vertical clouds with increasing height.C. Stratified clouds with little vertical development.12. What type clouds can be expected when an unstable air mass is forced to ascend a mountain slope?A. Layered clouds with little vertical development.B. Stratified clouds with considerable associated turbulence,C. Clouds with extensive vertical development.13. Which of the following combinations of weather producing variables would likely result in cumuliform-type clouds good visibility rain showers and possible clear—type icing in clouds?A. Unstable moist air and no lifting mechanism.B. Stable dry air and orographic lifting.C. Unstable moist air and orographic lifting,14. Which family of clouds is least likely to contribute to structural icing on an aircraft?A. Low clouds.B. High clouds.C.Clouds with extensive vertical development.15. Which clouds have the greatest turbulence?A. Towering cumulusB. cumulonimbusC. Altocumulus castellanus16. The presence of standing lenticular altocumulus clouds is a good indication ofA. A jet stream．B. Very strong turbulence.C. Heavy icing conditions.17. Fair weather cumulus clouds often indicateA. Turbulence at and below the cloud level.B. Poor visibilityC. Smooth flying conditions18. A ceiling is defined as the height of theA. highest layer of clouds or obscuring phenomena aloft that covers over 6/10 of thesky.B. lowest layer of clouds that contributed to the over all overcastC. lowest layer of clouds or obscuring phenomena aloft that is reported as broken orovercast19. What enhance the growth rate of precipitation?A. advective actionB. upward currentsC. cyclonic movement20. The presence of ice pellets at the surface is evidence thatA. these are thunderstorms in the areaB. a cold front has passedC. there is freezing rain at a higher altitude.21. What temperature condition is indicated if wet snow is encountered at your flight altitude?A. The temperature is above freezing at you altitudeB. The temperature is below freezing at your altitude.C. You are flying from a warm air mass into a cold air mass22. Which precipitation type normally indicates freezing rain at higher altitudes?A. SnowB. HailC. Ice pellets23. Select the characteristic (s) associated with the Cumulonimbus Clouds. More than one characteristic may apply.A. HailB. DrizzleC. LightningD. Stable airE. TurbulenceF. Restricted visibility for long periods24.云体高大，底部阴暗，云顶呈园弧形重叠的云是：A. CuB. TCuC. CbD. Sc25.决定大气稳定度的主要因素是：A. r值B. rd 值C. P值D. T值26.一般情况下，大气最不稳定的时间和季节分别是：A. 中午，冬季B. 早上，夏季C. 早上，冬季D. 午后，夏季27.一般情况下，大气最稳定的时间和季节分别是：A. 中午，冬季B. 早上，夏季C. 早上，冬季D. 午后，夏季28.速度最大的垂直运动是：A. 对流B. 系统性升降运动C. 乱流D. 大气波动29.对流运动的水平范围一般为：A. 几公里B. 几十公里C. 几到几十公里D. 几百公里30.对流上升运动形成：A. 积状云B. 层状云C. 波状云D. 堡状云31.大气不稳定时，常产生的垂直运动是：A. 对流和系统性升降运动B. 系统性升降运动和波动C. 波动和乱流D. 乱流和对流32.地球表面热力性质差异大的地区容易产生的垂直运动是：A. 对流和系统性升降运动B. 系统性升降运动和波动C. 波动和乱流D. 乱流和对流33.形成层状云的运动是：A. 对流B. 系统性运动C. 波动D. 乱流34.层状云包括：A. Ns Sc As StB. Sc As Cs FsC. Ci Cs As NsD. Fs Ns As St35.积状云包括：A. Cu TCu Cb FcB. TCu Fc Cc ScC. Cb Sc Ac CuD. Fc Cu Cb Cc36.严重影响飞机起降的低碎云主要是：A. Ns Fc StB. St Fs CuC. Fn St FsD. Fs Ns Fn37.国家气象部门和民航总局规定的计量云量的方法分别是：A. 十分制，八分制B. 八分制，十分制C. 十分制，十分制D. 八分制，八分制38.中云的云底高度通常规定为：A. 1500－4000米B. 2500－5000米C. 3000－6000米D. 2500－6000米Answers:1.A2.B3.A4.A5.C6.B7.C8.B9.B 10.A 11.C 12.C 13.C 14.B 15.B 16.B 17.A 18.C 19.B 20.C 21.A 22.C 23.ACE 24.B 25.A 26.D 27.C 28.A 29.C 30.A 31.D 32.D 33.B 34.C 35.A 36.C 37.A 38.D习题Chapter 5 AIR MASSES AND FRONTS1. An air mass is a body of air thatA. has similar cloud formations associated with itB. creates a wind shift as it moves across the Earth's surface．C. covers an extensive area and has fairly uniform properties of temperature andmoisture2. What is indicated about an air mass if the temperature remains unchanged or decreases slightly as altitude is increased?A. The air is unstable.B. A temperature inversion exists.C. The air is stable.3. Which weather condition is an example of a nonfrontal instability band?A.Squall line.B. Advective fog.C.Frontogenesis.4. The general characteristics of unstable air areA. good visibility, showery precipitation, and cumuliform-typed clouds.B. good visibility, steady precipitation, and stratiform-type clouds．C. poor visibility, intermittent precipitation, and cumuliform-typed clouds.．5. What are some characteristics of unstable air?A. Nimbostratus clouds and good Surface visibilityB. Turbulence and poor surface visibility．C. Turbulence and good surface visibility6. What are the characteristics of stable air?A. Good visibility, steady precipitation, and stratus-type clouds．B. Poor visibility, intermittent precipitation, and Cumulus-type clouds．C. Poor visibility，Steady precipitation, and Stratus-type clouds7. Which are characteristics of an unstable cold air mass moving over a warm surface?A. Cumuliform clouds, turbulence, and poor visibility．B. Cumuliform clouds, turbulence, and good visibilityC. Stratiform clouds, smooth air, and poor visibility．8. Which atmospheric factor causes rapid movement of surface fronts?A. Upper winds blowing across the front.B. Upper low located directly over the surface low.C. The cold front overtaking and lifting the warm front.9. What weather difference is found on each side of a "dry line"?A. Extreme temperature difference.B. Dewpoint difference.C. Stratus versus cumulus clouds.10. True／False．When an air mass is warmed from below，it becomes more stable11. True／False．Passage of a fast-moving cold front creates a narrow frontal zone with less severe weather than the passage of a slow moving cold front.12. Steady precipitation with little turbulence precedes what type of front?A. Cold frontB. Warm frontC. Occluded front13. What is the most reliable indication that you have flown through a front?A. Change in pressureB. Change in temperatureC. Change in wind direction14. What conditions favor the formation of a frontal wave?A. A fast-moving warm front overtaking a cold frontB. A deep low pressure are allocated northeast of a ridgeC. A stationary front or slow moving cold front with a strong temperature gradient15. Steady precipitation, in contrast to showers, preceding a front is an indication ofA. Stratiform clouds with moderate turbulence.B. Cumuliform clouds with little or no turbulence.C. Stratiform clouds with little or no turbulence.16.飞机由冷气团一侧垂直穿过稳定的缓行冷锋，首先看到的云是：A. 卷云B. 雨层云C. 高层云D. 高积云17.不稳定的急行冷锋经过机场时，通常会出现的天气现象是：A 晴朗微风的天气 B. 小雨和雾C. 层状云和低能见度D. 积状云、地面大风、阵性降水18.下列在我国能产生地面大风的天气形势是：A. 冷锋后的偏北大风B. 冷锋前的偏北大风C. 冷锋前的偏南大风D. 冷锋后的偏南大风Answers:1.C2.C3.A4.A5.C6.C7.B8.A9.B 10.F 11.F 12.B 13.C 14.C 15.C 16.A 17.D 18.A习题Chapter 6 TURBULENCE1. A pilot reporting turbulence that momentarily causes slight, erratic changes in altitude and /or attitude should report it asA. light turbulence.B. moderate turbulenceC. light chop2. If you fly into severe turbulence, which flight condition should you attempt to maintain?A. Constant airspeed (VA)B. Level flight attitude.C. Constantan altitude and constant airspeed.☆3. If severe turbulence is encountered during your IFR flight，the airplane should be slowed to the design maneuvering speed because theA. maneuverability of the airplane will be increased.B. amount of excess load that can be imposed on the wing will be decreased.C. airplane will stall at a lower angle of rang of attack, giving an increased margin of safety4. (Refer to Microburst figure below.) If involved in a microburst encounter, in which aircraft positions will the most severe downdraft occur?A. 4 and 5.B. 2 and 3.C. 3 and 4.Figure– Microburst5. (Refer to figure above.) When penetrating a microburst, which aircraft will experience an increase in performance without a change in pitch or power?A. 3.B. 2.C. 1.6. (Refer to figure above.) What effect will a microburst encounter have upon the aircraft in position 3?A. Decreasing headwind.B. Increasing tailwind.C. Strong downdraft.7. (Refer to figure above.) What effect will a microburst encounter have upon the aircraft in position 4?A. Strong tailwind.B. Strong updraft.C. Significant performance increase.8. (Refer to figure above.) How will the aircraft in position 4 be affected by a microburst encounter?A. Performance increasing with a tailwind and updraft.B. Performance decreasing with a tailwind and downdraft.C. Performance decreasing with a headwind and downdraft.9. What is an important characteristic of wind shear?A. It is an atmospheric condition that is associated exclusively with zones ofconvergence.B. The Coriolis phenomenon in both high- and low-level air masses is the principalgenerating force.C. It is an atmospheric condition that may be associated with a low-level temperatureinversion, a jet Stream, or a frontal zone.10. Which wind-shear condition results in a loss of airspeed?A. Decreasing headwind or tailwind.B. Decreasing headwind and increasing tailwind.C. Increasing headwind and decreasing tailwind.11 Which is a characteristic of low-level wind shear as it relates to frontal activity?A. With a warm front, the most critical period is before the front passes the airport.B. With a cold front, the most critical period is just before the front passes the airport.C. Turbulence will always exits in wind-shear conditions．12. Hazardous wind shear is commonly encountered near the groundA. during periods when the wind velocity is stronger than 35 knots．B. during periods when the wind velocity is stronger than 35 knots and near mountainvalleys.C. during periods of strong temperature inversion and near thunderstorms13. The strength and location of the jet stream is normallyA stronger and farther north in the winterB weaker and farther north in the summerC stronger and farther north in the summer14. Which is a necessary condition for the occurrence of a low-level temperature inversion wind shear?A. The temperature differential between the cold and warm layers must be at least 10degrees C.B. A calm or light wind near the surface and a relatively strong wind just above theinversion.C. A wind direction difference of at least 30 degrees between the wind near thesurface and the wind just above the inversion.15. What is the lowest cloud in the stationary group associated with a mountain wave?A. Rotor cloud.B. Standing lenticular.C. Low stratus.16. Possible mountain wave turbulence could be anticipate when winds of 40 knots or greater blowA. across a mountain ridge, and the air is stable.B. down a mountain valley, and the air id unstable.C. parallel to a mountain peak, and the air is stable.17. Where are jetstreams normally located?A. In areas of strong low pressure systems in the stratosphere.B. At the tropopause where intensified temperature gradients are located.C. In a single continuous band, encircling the Earth, where there is a break betweenthe equatorial and polar tropopause.18. Which type clouds may be associated with the jetstream?A. Cumulonimbus cloud line where the jetstream crosses the cold front.B. Cirrus clouds on the equatorial side of the jetstream.C. Cirrostratus cloud band on the polar side and under the jetstream.☆19. What action is appropriate when encountering the first ripple of reported clear air turbulence (CAT)?A. Extend flaps to decrease wind loading.B. Extend gear to provide more drag and increase stability.C. Adjust airspeed to that recommended for rough air.20. Which flight conditions of a large jet airplane create the most severe flight hazard by generating wingtip vortices of the greatest strength?A. Heavy, slow, gear and flaps up.B. Heavy, slow, gear and flaps down.C. Heavy, fast, gear and flaps down.21. Hazardous vortex turbulence that might be encountered behind large aircraft is created only when that aircraft isA. developing lift.B. operating at high airspeeds.C. using high power settings.22. Wingtip vortices created by large aircraft tend toA. sink below the aircraft generating the turbulence.B. rise from the surface to traffic pattern altitude.C. accumulate and remain for a period of time at the point where the takeoff rollbegan.23. To avoid the wingtip vortices of a departing jet airplane during takeoff, the pilot shouldA. lift off at a point well past the jet airplane's flight path.B. climb above and stay upwind of the jet airplane's flight path.C. remain below the flight path of the jet airplane.24. If you take off behind a heavy jet that has just landed, you should plan to lift offA. prior to the point where the jet touched down.B. beyond the point where the jet touched down.C. at the point where the jet touched down and on the upwind edge of the runway.25. Discuss the in-flight Visual indications of possible Wind Shear.26.云中飞行颠簸非常强烈的云主要是：A. Tcu, ScB. Sc, AcC. Ac,CbD. Cb,T cu27.下列何种地区最容易出现山地背风波：A. 丘陵地区B. 山谷风盛行地区C. 孤立山峰的后面D. 高大山脉的背风面上空28.在山地背风波的下降气流中飞行时，除造成飞机掉高度外，还可造成的严重危害是：A. 气压式高度表读数高于实际高度B. 空速表误差增大C. 地速减小D. 实际空速减小29.在机场周围存在下列何种地表时，容易产生飞机颠簸？A. 湖泊与森林B. 水渠与河流C. 河流与山丘D. 草地与庄稼30.在下列何种天气系统中最容易遇到飞机颠簸？A. 急行冷锋B. 气旋C. 地形造成的静止锋D. 锢囚锋31.同一种飞机在低速飞行时，飞行速度越大，飞机颠簸的：A. 范围越小B. 强度越弱C. 强度变化不明显D. 强度越大32.我国青藏高原上空常有较强的飞机颠簸，其原因主要是：A. 高原上空气稀薄，飞机升力小B. 高原上容易形成地形波C. 高原上冷暖空气活跃，常有锋面活动D. 高原上地形起伏，风力大，日照强33.小型飞机尾随大型飞机起降时容易发生事故，其原因是：A. 大型飞机后有较强的尾涡湍流B. 大型飞机排出的废气严重地影响了能见度C. 大型飞机起降时造成了严重的低空风切变D. 大型飞机后有较强的下冲气流34.同一种飞机，机翼载荷越大，飞机颠簸：A. 次数越频繁B. 强度越弱C. 强度越强D. 强度无变化35.高空急流形成的原因是：A. 大气中有大的水平温度梯度B. 冷锋后有大的水平气压梯度C. 越到高处，风速越大，最后形成急流D. 高空槽和高压脊的影响36.晴空乱流出现的一般高度是：A. 距地面1500米至6000米高度范围内B. 距地面6000米以上高度C. 距地面9000米至12000米高度范围内D. 距地面12000米以上高空37.在300百帕等压面图上，等高线密集区即为：A. 高空锋区B. 高空槽区C. 切变线区D. 高空急流区38.对流层顶有断裂现象或坡度较陡时，会出现何种影响飞行的天气现象：A. 大气波动B. 晴空乱流C. 西风急流D. 下冲气流39.我国规定低空风切变的出现高度是：A. 场面高度600米以下B. 场面高度300米以下C. 海平面高度600米以下D. 场面高度1000米以下40.下面那种情况可能引起低空风切变？A. 气旋过后B. 地面有微风且风向不定时C. 飞行中穿过切变线时D. 低空有逆温层，且在其上面有强风时41.下述何种地区最容易出现低空风切变？A. 在气压和温度急剧下降的地区B. 海陆交界地区C. 有雷暴活动的锋面附近D. 空中冷平流较强的地区42.飞机从逆风进入顺风时所遇到的风切变称为：A. 顺风切变B. 逆风切变C. 侧风切变D. 逆顺风切变Answers:1.A2.B3.B4.C5.C6.C7.A8.B9.C 10.B 11.A 12.C 13.B 14.B 15.A 16.A 17.B 18.C 19.C 20.A 21.A 22.A 23.B 24.B 25.In humid climates where the bases of convective clouds tend to be low,microbursts are associated with a visible rainshaft. In drier climates, the higher thunderstorm cloud bases result in the evaporation of the rainshaft. The only visible indications under these conditions may be virga at the cloud base and a dust ring on the ground.26.D 27.D 28.A 29.C 30.A 31.D 32.D 33.A 34.B 35.A 36.B 37.D 38.B 39.A 40.D 41.C 42.A习题Chapter7 ICING1. What is a feature of supercooled water?A. The water drop sublimates to an ice particle upon impact.B. The unstable water drop freezes upon striking an exposed object.C. The temperature of the water drop remains at 0°C until it impacts a part of theairframe, then clear ice accumulates.2. Which conditions result in the formation of frost?A. The temperature of the collecting surface is at or below freezing and small dropletsof moisture are fallingB. When dew forms and the temperature is below freezingC. Temperature of the collecting surface is below the dew point of surrounding air andthe dew point is colder than freezing.3. When will frost most likely form on aircraft surfaces?A. On clear nights with stable air and light winds.B. On overcast nights with freezing drizzle precipitation.C. On clear nights with convective action and a small temperature/dewpoint spread.4. What condition is necessary for the formation of structural icing in flight?A. Supercooled water drops.B. Water vapor.C. Visible water.5. Which type precipitation is an indication that supercooled water is present?A. Wet snow.B. Freezing rain.C. Ice pellets.6. Which type of icing is associated with the smallest size of water droplet similar to that found in low-level stratus clouds?A. Clear ice.B. Frost ice.C. Rime ice.7. Why is frost considered hazardous to flight operation?A. Frost changes the basic aerodynamic shape of the airfoilB. Frost decreases control effectivenessC. Frost causes early airflow separation resulting in a loss of lift8. In which meteorological environment is aircraft structural icing most likely to have the highest rate of accumulation?A. Cumulonimbus clouds.B. High humidity and freezing temperature.C. Freezing rain9. What is an operational consideration if you fly into rain which freezes on impact?A. You have flown into an area of thunderstorms．B. Temperatures are above freezing at some higher altitude.C. You have flown through a cold front.10. Test data indicate that ice, Snow, or frost having a thickness and roughness similar to medium or coarse sandpaper on the leading edge and upper surface of an airfoilA. reduce lift by as much as 50 percent and increase drag by as much as 50 percentB. increase drag and reduce lift by as much as 25 percent．C. reduce lift by as much as 30 percent and increase drag by 40 percent11. What condition is indicated when ice pellets are encountered during flight?A. Thunderstorms at higher levels.B. Freezing rain at higher levels.C. Snow at higher levels.。