Meteorology

1. 49264 With an anticyclone over the Europe the expected weather is:

Thunderstorms in summer; fog in winter

Stratus in summer with drizzle; CU and snow in winter

Clear skies or fair weather CU in summer; fog in winter

Clear skies in summer with haze; cold frontal weather in winter

2. 49130 Hazards of the mature stage of a TS cell include lightning; turbulence and:

Microburst; windshear and anvil

Icing; microburst and windshear

Icing; drizzle and microburst

Windshear; hail and fog

3. 49265 Refer to the picture.The pressure systems at A2; B1; B2; B3; and C2 are respectively:

Depression; Anticyclone; Col; Ridge; and Through

Ridge; Anticyclone; Col; Through; and Depression

Through; Depression; Col; Ridge; and Anticyclone

Ridge; Depression; Col; Through and Anticyclone

4. Refer to the picture. Precipitation at the surface underneath B is likely to be:

Light drizzle

Continuous moderate

Showers; heavy with the possibility of hail

Nil

5. 49099 The international standard atmosphere assumes a lapse rate of:

2ºC / 1000 ft

1.5ºC / 1000 ft

3ºC / 1000 ft

1.98ºC / 1000 ft

6. 49209 The aircraft altimeter will read zero at aerodrome level with which pressure setting set on the altimeter sub scale:

QFF

QNH

QNE

QFE

7. 49211 Generally as altitude increases:

Temperature decreases and density increases

Temperature; pressure and density decreases

Temperature and pressure increase and density decreases

Temperature decreases and pressure density increases

8. 49212 A trough of low pressure is:

A small low established within the circulation of another low

An extension or elongation of a low pressure system along an axis on each side of which pressure increases

A center of pressure surrounded on all sides by higher pressure

An area where the pressure is lower than anywhere else in the area

9. 49136 Hoar frost forms on an aircraft when:

The aircraft suddenly enters a cloud at below freezing temperature

The aircraft in sub zero clear air suddenly enters a colder region

The aircraft in sub zero clear air suddenly enters a warmer moist region

The aircraft suddenly enters a cloud which is at a higher temperature than the surrounding air

10. 49285 The type of precipitation in which visibility is likely to be most reduced:

Drizzle

Snow

Light rain

Sleet

11. Refer to appendix A-4A. The cloud in grid square S8 is most likely to be:

Cirrus

Nimbostratus

Altocumulus

Stratus fractus

12. 49288 A microburst usually lasts for___ and is about across.

20 minutes; 20 NM

5 minutes; 5 km

30 minutes; 10 NM

45 minutes; 5 NM

13. 49139 Refer to appendix A-4A. Precipitation will reach the ground mainly in the area:

L14-R14

Q14-S14

O14-T14

J14-O14

14. 49290 _____ forms when moist air_ over a surface which is__ than the dew point of the air. Fill in the missing 3 from the list given below:

Radiation fog; passes; warmer

Advection fog; settles; cooler

Advection fog; passes; cooler

Radiation fog; settles; warmer

15. 49234 The following is unlikely to be hazard below a thunderstorm:

Severe turbulence

Severe icing

Windshear

Large variations in pressure setting values

16. 49291 Advection fog:

Only occurs at night and early morning

Is most likely with Polar Maritime air

Will only clear by insolation

Can sometimes last for 24 hours or more in winter

17. Refer to appendix A-4A. In grid square M6 the worst cloud conditions for flying could be:

Altocumulus

Cumulonimbus embedded in nimbostratus

Cumulonimus

Nimbostratus

18. 49235 thunderstorms are likely if

Air is unstable; there is sufficient water vapor and there is trigger action

Air is completely stable; there is sufficient water vapor and there is lifting orographically

There is a warm front

There is a col in winter

19. 49293 Flying 50 NM ahead of a warm front out of cloud at 1000 ft in winter; with an ambient temperature of -8 DegreesC; there is a strong risk of:

Hoarfrost

Rime icing and carburetor icing

Structure damage caused by hail

Clear ice in the form of rain ice

20. 49141 Tropical revolving storms usually:

Move in a westerly direction before re-curving towards the equator

Move in an easterly direction before re-curving towards the nearest pole

Do not form within 5 Degrees of the equator

21. 49142 With reference to tropical revolving storms; which of the following statements is correct?

Typhoons are found in the South China sea in January

Cyclones occur in May of Bengal in winter

Hurricanes in the South Atlantic sometimes affect the east coast of Brazil

Hurricanes affect the south east of the USA in late summer

22. 47280 The visibility and significant present weather as reported for LRBS at 070630Z is:

200M; on runway 07 RVR is 225M and visibility is 400M; freezing fog; within the fog visibility zero

200M; on runway 07 RVR has an upward tendency from 225M to 400M; freezing fog; within the fog isibility zero

200M; on runway 07 variable RVR 225-400M; freezing fog

23. 47156 How are hazes layers cleared or dispersed? By:

Convective mixing in cool night air

Wind or the movement of air

Evaporation similar to the clearing of fog

24. 47164 What feature is associated with a temperature inversion?

A stable layer of air

An unstable layer of air

Air mass thunderstorms

25. 47173 Why are downdrafts in a mature thunderstorm hazardous? They:

Are kept cool by cold rain; which tends to accelerate the downward velocity

Converge toward a central location under the storm after striking the surface

Become warmer than the surrounding air and reverse into an updraft before reaching the surface

26. 49297 With a cold occlusion:

The air ahead of the warm front is colder than the air behind the cold front

The warm sector remains on the surface

The cloud type is predominately layer with a wide precipitation band

There is a risk of CB embedded in NS

27. 47168 If the ambient temperature is warmer than standard at FL350; what is the density altitude compared to pressure altitude?

Lower than pressure altitude

Higher than pressure altitude

Impossible to determine without information on possible inversion layers at lower altitude

28. 49102 The barometric Pressure at the airfield datum point is known as:

QNE

QNH

QFE

Standard Pressure

29. 47191 Where is the normal location of the jetstream relative to surface lows and fronts?

The jetstream is located north of the surface system

The jetstream is located south of the low and warm front

The jetstream is located over the low and crosses both the warm front and the cold front

30. 49196 In comparison with a primary depression a secondary depression is:

Always more active

Sometimes more active

Never more active

Unlikely to produce gale force winds

31. 47295 Refer to Sig.Wx chart.The weather phenomena expected in area 3 is:

Moderate clear air turbulence from FL 220 to FL 360

Severe clear air turbulence from FL 220 to FL 360

Severe turbulence in the clouds from FL 220 and FL 360

Moderate turbulence in the clouds from FL 220 and FL 360

32. 47157 Which term applies when the temperature of the air changes by compression or expansion with no heat added or removed?

Katabatic

Advection

Adiabatic

33. 47169 Which pressure is defined as station pressure?

Altimeter setting

Actual pressure at field elevation

Station barometric pressure reduced to sea level

34. 47172 What feature is normally associated with the cumulus stage of a thunderstorm?

Beginning of rain at the surface

Frequent lightning

Continuous updraft

35. Refer to the picture. The relative temperatures at A; B and C could be respectively:

+6; +8; +10

+8; +10; +6

+8; +10; +8

+10; +6; +8

36. 49347 When a cold front passes a Station in Israel:

The wind veers and the dewpoint falls

The wind backs and the dewpoint falls

The wind veers and the dewpoint rises

The wind backs and the dewpoint rises

37. 49349 Refer to the picture.flight conditions at B are likely to be:

Smooth and clear

Layer clouds with only light turbulence

Some turbulence in NS with the possibility of embedded CB giving moderate/severe turbulence

Flight in CU; CB with some turbulence

38. 49351 A warm occlusion occurs when:

Warm air is forcing cool air over cold air

Cold air is forcing cool air over warm air

Cool air is forcing warm air over cold air

Cool air is forcing cold air aloft

39. 49214 An inversion is one in which:

There is no horizontal gradient of temperature

There is no change of temperature with height

There is an increase of temperature as height increases

There is a decrease of temperature as height increases

40. 47154 Which type clouds are indicative of very strong turbulence?

Nimbostratus

Standing lenticular

Cirrocumulus

41. 47186 What is a characteristic of the troposphere?

It contains all the moisture of the atmosphere

There is an overall decrease of temperature with an increase of altitude

The average altitude of the top of the troposphere is about 6 miles

42. Refer to the picture.The names of the air masses indicated E; F; G and H are respectively:

Tropical maritime; polar continental; tropical continental; arctic

Polar continental; tropical maritime; tropical continental; arctic

Polar continental; tropical continental; tropical maritime; arctic

Tropical maritime; polar maritime; tropical continental; polar maritime

43. 49147 The large change in the direction of trade winds is caused by:

Local pressure differences

An excess of air at height in association with the Hadley cells

The change in geostrophic force when crossing the geographic equator

The cyclostrophic force in the equatorial regions

44. Refer to the picture.In area M in the winter there will be:

Equatorial rains

Extensive low cloud

The doldrums

Dry trade wind condition

45. 49148 Refer to appendix A-5C. In area Q the climate will include:

Polar front depressions

Cold anti-cyclonic weather

Temperatures above zero for 3 months of the year

Good visibility throughout the year

46. 49269 The wet bulb temperature:

Is measured using a hydrometer

Is the minimum temperature to which a thermometer bulb can be cooled by the evaporation of water

Measures the dew point of the air

47. 49149 An aircraft is flying at 3000 feet indicated with the altimeter sub scale set to 1020 mb towards a mountain range with an elevation of 1600 feet. If during the flight the QNH in the area falls to 989 mb and the altimeter sub scale is not reset; the expected clearance over the mountain range will be: [assume 27 feet = 1 mb]

1400ft

470ft

930ft

563ft

48. 49303 Refer to the picture.The cloud to be expected along the front at A2 is:

CI

AS NS

ST

CU

49. 49270 If the temperature near the surface in Hong Kong is +31 DegreesC then rising saturated air will cool at a rate of:

3 Degrees/1000ft

2.5 Degrees/1000ft

1.5 Degrees/1000ft

1 Degrees/1000ft

50. 49218 If the dry bulb temperature at the surface is +7.5 DegreesC and the observed temperature at 4000 ft is +5.5 DegreesC; the air could be best described as:

Absolutely stable

Conditionally unstable

Unstable

Absolutely unstable

51. 47153 What is the lowest cloud in the stationary group associated with a mountain wave?

Rotor cloud

Standing lenticular

Low stratus

None of the Above

52. 47144 Which conditions are most conductive to the formation of radiation fog?

Moist; tropical air moving over cold offshore water

Warm moist air over flatland areas on clear nights with calm winds

A warm; moist air mass which moves over a relatively cooler surface

None of the Above

53. 47131 Which type of jet stream can be expected to cause the greater turbulence?

A straight jet stream associated with a high pressure ridge

A jet stream associated with wide isotherm spacing

Curving jet stream associated with a deep low pressure trough

None of the Above

54. 49156 The QFF is the atmospheric pressure:

At the place where the reading is taken

Corrected for temperature difference from standard and adjusted to MSL assuming standard atmospheric conditions exist

At a place where the reading is taken corrected to MSL taking into account the prevailing temperatureconditions

As measured by a barometer at the aerodrome reference point

55. 47134 What is correct about structural icing in flight?

None of the Above

56. 49159 An area of indeterminate pressure between two lows and two highs is called:

A trough

A ridge

A col

A saddle

57. 47141 Which weather phenomenon signals the beginning of the mature stage of a thunderstorm?

The appearance of anvil top

The start of rain on the surface

Growth rate of the cloud is at its maximum

None of the Above

58. 49161 The instrument used for measuring the humidity of air is a:

Hydrometer

Hygrometer

Wet bulb thermometer

Hygroscope

59. 49200 Near the equator upper winds tend to be:

Easterly

Westerly

At speeds greater than 60 knots

Calm

60. 49308 QNH at Johannesburg is 1025 hpa; elevation is 1600m AMSL. What is the QFE. [Assume 1 mb = 8m]

1000.8 hPa

830.6 hPa

1002 hPa

825 hPa

61. 49201 The polar front is:

The boundary surface between polar continental and tropical continentl air

Near the poles

Only apparent over the Atlantic ocean

The region where warm sector depressions develop

62. 49309 Which of the following statements is most correct when describing ISA:

The MSL pressure is 1013.25 mbs and the temperature is + 15 DegreesC

The MSL pressure is 1013.25 mbs and the temperature is +15 DegreesC with a lapse rate of 1.98 DegreesC/1000 ft

63. 49104 The pressure of the atmosphere:

Decreases at an increasing rate as height increases

Decreases at a constant rate as height increases

Decreases at a decreasing rate as height increases

Decreases at a constant rate up to the tropopause and then remains constant

64. 47140 Which thunderstorms generally produce the most severe conditions; such as heavy hail and destructive winds?

Cold front thunderstorms

Warm front thunderstorms

Squall line thunderstorms

None of the Above

65. 49241 Which of the following conditions is most favorable for the formation of carburetor icing if the aircraft is descending with glide power set:

Relative humidity: 25%; Ambient temperature: +25 DegreesC

Relative humidity: 40%; Ambient temperature: +20 DegreesC

Relative humidity: 50%; Ambient temperature: -10 DegreesC

Relative humidity: 30%; Ambient temperature: -5 DegreesC

66. 49151 The captain of an aircraft needs to know the height of the Tropopause because:

It normally represents the limit of weather

Density starts to increase

There are no longer jet streams and CAT

It indicates the height of the thermal wind

67. 49165 The DALR is greater than the SALR because:

Saturated vapor pressure increases with increasing temperature

Convection is more active in dry air than in moist air

The rate of cooling of saturated air is reduced by the release of latent heat of condensation

Because of the release of latent heat of evaporation

68. 49106 A trough of low pressure is generally associated with:

Convergence causing increased cloud and precipitation

Divergence causing increased cloud and precipitation

Subsidence causing increased cloud and precipitation

Subsidence causing decreased cloud and precipitation

69. 49221 Refer to the picture.Flight conditions at B1 are likely to be:

Smooth

Turbulent

Turbulent in breaking wave crests

Turbulent due to marked up and down currents

70. 47127 What is the cyclostrophic wind?

This is the wind blowing around curved isobars

This is the wind blowing around straight isobars

This is the wind blowing around cyclones only

None of the Above

71. 47284 What is the meaning of the coded form M03/M04 in the weather report for LFBD at 070630?

The actual temperature is -3 DegreesC and the difference between the actual temperature and the dew point is -4 DegreesC

The actual temperature is -3 DegreesC and the dew point temperature is -4 DegreesC

The actual temperature is -4 DegreesC and the dew point temperature is -3 DegreesC

72. 49222 Refer to appendix A-l. The most extreme turbulence can occur:

At B1

At A2

At ABC-4

At B2; 3; 4 and at C2; 3; 4

73. 47132 What action is recommended; if possible; regarding a course change; if jet stream turbulence is encountered [a jet stream is encountered [with a direct headwind or tailwind]?

Change course to the left or right

Change course to the polar side of the jet stream

Change course to the equatorial side of the jet stream

None of the Above

74. 49170 The surface wind direction in the Northern Hemisphere is backed from the 2000 ft wind by an average of 30 Degrees over land due to:

The frictional effect at the surface; causing the surface isobars to curve more than those at 2000 ft

The effect of the cyclostrophic force; which is strongest at the surface due to increased curvature

75. 49203 The Altimeter will always read

With 1013 set the altitude above MSL

With airfield QNH set the height above the airfield datum

The vertical distance above the pressure level set

The correct flight level with regional QFE set

76. 49223 The significance of lenticular cloud is:

There may be mountain waves present and there will be severe turbulence

There are mountain waves but they may not give severe turbulence

A Fohn wind can be expected with no turbulence

A Katabatic wind is present which may lead to fog in the valleys

77. 49171 When a Fohn wind occurs:

There are unstable conditions on the downwind side of the mountain

Wind speed must be at least 15 kt at the surface increasing with height and maintaining direction

78. 49245 Refer to the picture.What type of cloud will be found at X

CS

NS

SC

CB

79. 47285 What is the meaning of the coded form M02/M02 in the weather report for LFBO a t 070630?

The actual temperature is -02 DegreesC and the difference between the actual temperature and the dew point is -2 DegreesC

The actual temperature and the dew point are -2 DegreesC

The minimum air temperature is +2 DegreesC and the minimum of dew point temperature is -2 DegreesC

80. 49172 The geostrophic wind blows:

Parallel to curved isobars

When pressure values are changing rapidly

In a tropical revolving storm

When geostrophic force and pressure gradient force are equal

81. 49311 A line drawn on a chart joining places having the same barometric pressure at the same level and at the same time is:

An isotherm

An isallobar

A contour

An isobar

82. 49247 After passage of an occluded front in the Northern Hemisphere:

Wind: backs; Temperature: stops falling; Precipitation: continues

Wind: veers; Temperature: drops rapidly; Precipitation: stops abruptly

Wind: veers; Temperature: drops rapidly; Precipitation: begins to dry up

Wind: backs; Temperature: rises quickly; Precipitation: increases in strength

83. 49174 The 2000' wind is 040/20 knots in the southern hemisphere. The thermal wind component is 30 knots with the warm air to the north and cold to the south.What is the resulting wind aloft?

070/46

315/23

250/46

135/23

84. 49313 Pressure will.................... with increase of height and will be about....................... at 10000 ft and................. at 30000ft

Increase; 800 mb; 400 mb

Decrease; 700 mb; 300 mb

Increase; 200 mb; 800 mb

Decrease; 500 mb; 200 mb

85. 47286 What is the difference between the actual air temperature and the dew point at LBSF at 070630Z?

- 7 DegreesC

+7 DegreesC

14 DegreesC

0 DegreesC

86. 47331 Pressure will with increase of height and will be about at 10000 ft ___ at 30000 ft.

Increase; 800 mb; 400 mb

Decrease; 700 mb; 300 mb

Increase; 200 mb; 800 mb

Decrease; 500 mb; 200 mb

87. 47199 Which action is recommended regarding an altitude change to get out of jetsream turbulence?

Descend if ambient temperature is falling

Descent if ambient temperature is rising

Maintain altitude if ambient temperature is not changing

None of the Above

88. 47244 What visibility would you expect at LBSF at 0700?

1200

PROB 30 0300

1200; PROB 30 temporary 0300

89. 47195 Turbulence encountered above 15;000 feet AGL; not associated with cloud formations; should be reported as:

Convective turbulence

High altitude turbulence

Clear air turbulence

None of the above

90. 47287 What is the difference between the actual air temperature and the dew point at LROP at 070630Z?

12 DegreesC

-12 DegreesC

+12 DegreesC

0 DegreesC

91. 47288 What is the meaning of the coded form RESN in the weather report for LOWL at 070650Z?

The snow ended

Continuous snow

Snow transformed to the rain

92. 49110 During a night with a clear sky; surface temperature will _. RH will and dew point will ___

Fall; Rise; Rise

Rise; Rise; Fall

Fall; Rise; Remain the same

Fall; Fall; Remain the same

93. 49319 Which of the following statements relating to atmospheric humidity is correct

If the air temperature falls then the absolute humidity must increase

The absolute humidity is the mass of water vapor contained in unit volume of air

The diurnal variation of dew point temperature is greatest when skies are clear at night

The dew point temperature is the temperature indicated by the wet bulb thermometer

94. 49111 A change of state directly from a solid to vapor or vice versa is:

Insolation

Condensation

Evaporation

Sublimation

95. 49233 The term 'shower' implies that:

Precipitation is in the form of rain and is continuous

Precipitation is from cumulonimbus cloud and lasts for short periods

Precipitation is intermittent and is from strata form cloud

Precipitation is continuous for long periods from cumuloform cloud

96. 49112 The actual change of temperature with height is known as:

The environmental lapse rate

The adiabatic lapse rate

The temperature curve

The tephigram

97. 49322 When condensation takes place; the higher the temperature the __ the amount of latent heat _

Lesser; released

Greater; absorbed

Greater; released

Lesser; absorbed

98. 49323 The air is stable if:

It moves very little

There are few changes in pressure

When a lifting force is removed the air tries to return to its original position

When the lifting force is removed the air continues to rise

99. 49338 hunderstorms caused by__________ are most common in the summer and by_in the _______

Lapse rate; air masses; late spring

Air masses; frontal activity; winter

Cold fronts; air masses; autumn

Air masses; frontal activity; summer

100. 49324 Absolute instability occurs when:

DALR > ELR

ELR > DALR

SALR > ELR

SALR < ELR

101. 49114 In a given atmosphere where the relative humidity is 60% and the ELR is less then the DALR. If air is forced to rise it is:

Unstable and will carry on rising

Stable and will carry on rising

Unstable and will tend to regain its former position

Stable and will tend to regain its former position

102. 47146 At lower levels of the atmosphere; friction causes the wind to flow across isobars in to a low because the friction:

Decreases windspeed and Coriolis force

Decreases pressure gradient force

Creates air turbulence and raises atmospheric pressure

None of the Above

103. 49226 In the N. hemisphere; if the geostrophic wind near the surface was 210/60. The thermal wind was 20 knots with the lowest mean temperature in the northwest.The upper wind was

210/40kt

210/80kt

300/40kt

030/80kt

104. 49328 A ravine valley wind:

Is a wind blowing at increased speed along a valley

Is a wind blowing from a hill to a valley below

Is a wind blowing up a hill from a valley

Is a wind blowing at reduced speed along a valley

105. 49360 An airfield in Holland is 20m below sea level; QFF is 1020 hPa; temperature at the surface is +30 DegreesC. What is the value of QNH.

Impossible to determine

Less than 1020 hPa

Same as QFF

More than 1020 hPa

106. 47257 What cloud quantity and base would you expect at EFHK at 1800z?

BKN 015

BKN 010 SCT 015 CB

BKN 015; PROB 30% temporary BKN 010 SCT 015 CB

107. 49329 In an anticyclone at 2000'; in the northern hemisphere; the wind was 060/20 knots. The likely surface w/v over land is:

070/15kt

050/10kt

030/10kt

030/15kt

108. 49204 An aircraft at airfield P elevation 270 ft has the airfield QNH 1012 mbs correctly set. The altimeter setting is not changed. Later on landing at airfield Q elevation 450 ft the aircraft altimeter reads 531 ft. What is the correct QNH at airfield Q? [Assume 27 ft = 1 mb]

1014.7 mbs

1009.3 mbs

1015 mbs

1009 mbs

109. 49227 In middle latitudes the westerly component of the upper wind normally increase with height because:

The pressure gradient force increases

The geostrophic force increases

The density increases

The thermal wind component on average is westerly

110. 47135 What is correct about structural icing in flight?

None of the Above

111. 49201 The polar front is:

The boundary surface between polar continental and tropical continental air

Near the poles

Only apparent over the Atlantic ocean

The region where warm sector depressions develop

112. 47143 Which of the following characterizes advection fog?

Moist air moving over colder ground or water

Clear; cold; calm night

Evaporation of precipitation

None of the Above

113. 47292 Refer to the attached figure.What is mean by the 230 sign at some points on the significant weather map?

The tropopause low

There is an icing at spot location at flight levels lower than FL 230

There is turbulence at spot location at flight levels lower than FL 230

None of the above

114. 49334 On weather charts; the station circle shows the height of the cloud base:

Above ground level

Above mean sea level

At a pressure altitude

In meters above surface level

115. Refer to the picture.In area P the main weather factor will be:

Polar front depressions

Depressions in winter; anti-cyclones in summer

Extensive low cloud throughout the year

Monsoon weather

116. 49176 Cloud types are classified under three basic family headings; these are:

Cirriform; Stratiform; Cumuliform

Stratiform; Heap; Cirriform

Cirrus; Cumulus and layer

Cumulus; Layer and Heap

117. Refer to the picture.In area 0 the climate will include:

The trade winds

Dry warm summers and wet winter season

Steppe type with grassy plains

A wet summer and dry cold winters

118. 49177 :Low cloud in temperate climates; excluding heap are those existing from

The surface to 6500

1000' to 6500

The surface to 8000

1000'to 8000

119. 47176 Where do squall lines most often develop?

In an occluded front

Ahead of a cold front

Behind a stationary front

120. 47185 Which type of icing is associated with the smallest size of water droplet similar to that found in low-level stratus clouds?

Clear ice

Frost ice

Rime ice

121. 47179 A clear area in a line of thunderstorm echoes on a radar scope indicates

The absence of clouds in the area

An area of no convective turbulence

An area where precipitation drops are not detected

122. 47293 Refer to the attached figure. What we mean by the 310 sign at some points on the significant weather map?

There is an icing at spot location at flight levels higher than FL 310

There is turbulence at spot location at flight levels higher than FL 310

Tropopause high

None of the above

123. 49179 The type of cloud from which continuous moderate or heavy rain is likely to fall is:

Large cumulus

Altostratus

Nimbostratus

Cumulonimbus

124. 49272 Which of the following statements is true?

The tropopause is the line between the stratosphere and the tropopause

Stability increase as the environmental lapse rate decreases

Heat is added to the environment by evaporation of raindrops

High surface temperature and a plentiful supply of moisture are the only conditions required for the development of thunderstorm

125. 49185 If a station equipped with IRVR equipment reports RVR 1000; this means:

RVR at touchdown is 1000 meters

RVR at touchdown is 1000 meters and at 'mid point' and 'stop end' the RVR is 800 meters or more

RVR at touchdown is 1000 meters and 'mid point' and 'stop end' equipment is unserviceable

RVR all along the runway is 1000 meters or more

126. 49186 Most cases of serious piston engine icing occur in cloud; fog; or precipitation with a temperature range between:

-10 DegreesC to +25 DegreesC

-18 DegreesC to +5 DegreesC

-10 DegreesC to 0 DegreesC

-20 DegreesC to +15 DegreesC

127. 49255 The altimeter subscale is set to 1030 mbs and the altimeter reads 4500'. QNH is 996 mbs. What is the altitude of the aircraft? [Assume 1 mb = 27]

3480

3990

5418

3582

128. 49123 An aircraft on a transatlantic flight from New-York to London is forecast to cross the surface position of a cold front at 1000 UTC.The cold front jet is aligned SW-NE and is associated with the cold front.Strong wind shear is likely to be found:

Above the jet core and also on the warm side of the jet core

Directly below the jet core and also on the cold side of the jet core

Level with the axis on the cold side of the jet core

After the jet core has been passed

129. 49229 Lumpy or heaped white cloud is:

Altocirrus

Cumulus

Cumulonimbus

Nimbostratus

130. 49125 Which piece of equipment is used to measure cloud base:

Barograph

Hygrometer

Alidade

Barometer

131. 49188 Clear ice forms as a result of:

Large super cooled water droplets spreading as they freeze

Ice pellets splattering on the aircraft

Small super cooled water droplets splashing over the aircraft

Water vapor freezing to the aircraft

132. 49276 The force which causes the air to flow parallel to the curved isobars is called:

Centrifugal force

Cyclostrophic force

Geostrophic force

Gradient force

133. 49207 In the ISA the temperature is isothermal:

Up to 36090 ft/11 km

From 36090 ft/11 km to 65617 ft/20 km

From 36090 ft/11 km to 104987 ft/32 km

From 36090 ft/11 km to 45090 ft/13.75 km

134. 49191 The weather associated with polar maritime air is:

Overcast; moderate drizzle

Overcast; moderate intermediate rain

Broken cloud; light; moderate or heavy rain

Broken cloud; moderate continuous rain

135. 49231 Typical base heights in temperate latitudes; of altocumulus cloud are in the range of:

6500 to 23000 ft

5000 to 15000 ft

8500 to 18000 ft

1000 to 6500 ft

136. 49277 The deflection of the surface wind direction from the geostrophic is; on average:

Over the land by night - 35 Degrees in cloudy conditions

Over the land by day - 35 Degrees in cloudy conditions

Over the sea - 30 Degrees

Over the sea - 10 Degrees; veered in the southern hemisphere

137. 49278 A contour chart cannot be used:

To find upper winds

To find the thermal wind

To locate jet streams

To locate upper ridges and troughs

138. 49126 In aerodrome reports and forecasts the height of the cloud base refers to:

The height above mean sea level

The height above aerodrome elevation

The pressure altitude of the cloud base

The height above the average ground level for the area

139. 49279 A line drawn on a chart joining places having the same temperature at the same level and at the same time is:

An isotherm

An isallobar

A contour

An isobar

140. 47174 During the life cycle of a thunderstorm; which stage is characterized predominately by downdrafts?

Cumulus

Dissipating

Mature

141. 49194 Refer to the picture. Which area will get the most rain at the surface?

A

B

C

D

142. 47181 What temperature condition is indicated if precipitation in the form of wet snow occurs during flight?

The temperature is above freezing at flight altitude

The temperature is above freezing at higher altitudes

There is an inversion with colder air below

143. 47183 Which type precipitation is an indication that supercooled water is present?

Wet snow

Freezing rain

Ice pellets

144. 49261 The aerodrome QNH is the aerodrome barometric pressure:

Corrected to mean sea level assuming standard atmospheric conditions exist

Corrected to mean sea level; assuming isothermal conditions exist

Corrected for temperature and adjusted to MSL assuming standard atmosphere conditions exist

Corrected to MSL using ambient temperature

145. 49129 The conditions which must exist to allow thunderstorms to develop are:

A trigger action; a plentiful supply of moisture and a very stable atmosphere

A steep lapse rate; a stable atmosphere through a large vertical extent and a plentiful supply of moisture

A plentiful supply of moisture and a steep lapse rate through a large vertical extent and a trigger action

A steep lapse rate through a large vertical extent; a low relative humidity and a trigger action

146. 49152 The main Ozone layer is to be found in the:

Thermosphere

Troposphere

Mesosphere

Stratosphere

147. 49315 Two important weather factors at B2 will be:

Fontal weather in winter; fog in summer

Clear conditions in summer; thunderstorm in winter

Thunderstorms in summer; fog in winter

Fog in summer; thunderstorm in winter

148. 49134 At temperature of between 0 DegreesC and -10 DegreesC clouds will consist of:

Entirely water droplets

Entirely ice crystals

Mostly water vapor

Mostly super cooled water droplets and a few ice crystals

149. 49144 The tropopause is:

More or less constant for any latitude

Is a boundary layer between the troposphere and the stratosphere

Normally the upper limit of weather

The upper limit for jet streams and mountain waves

150. 49145 Trade winds:

Blow towards the sub tropical anticyclones

Are caused by lifting over the heat equator and the subsequent air movements from the sub tropicalanticyclones

Only blow in the winter months

Blow from the equatorial low pressure systems throughout the year

151. 47241 What visibility would you expect at EFTU at 1500z?

6000

9999; temporary 6000

9999

152. 49109 throughout the 24 hours of a day; the Relative Humidity can be expected to

Increase during the day and decrease at night

Stay reasonably constant throughout the 24 hours

Reduce during the day and increase at night

Only change with a change of air mass

153. 49206 The atmosphere is a mixture of gasses of the following proportions:

Oxygen 21%; nitrogen 78%; other gasses 1%

Oxygen 21%; hydrogen 78%; other gasses 1%

Nitrogen 78%; argon 21%; oxygen 1%

Nitrogen 78%; oxygen 21%; hydrogen 1%

154. 49282 The expected average height ranges for low; medium and high layer clouds in temperate latitudes are:

Low: surface-10000'; Medium: 10000'-20000'; High: 20000'-45000'

Low: surface-6500'; Medium: 6500'-23000'; High: 23000'-45000'

Low: surface-8000'; Medium:6500'-16500'; High: 16500'-45000'

Low: surface-6500'; Medium: 6500'-23000'; High: 16500'-45000'

155. Refer to the picture.The wind at ABC-4 is likely to be:

50 knots

40 knots

35 knots

A jet stream

156. 49131 On a significant weather chart the thunderstorm symbol signifies:

Moderate turbulence and moderate icing

Severe turbulence and severe icing

Moderate turbulence and severe icing

Moderate/severe turbulence and/or moderate/severe icing

157. 49132 Which of the conditions given below will lead to the formation of radiation fog?

Wind speed point: 7 knots; Cloud cover: 8/8 St; Temperature: 12 DegreesC; Dew: 11 DegreesC

Wind speed point: 15 knots; Cloud cover: NIL; Temperature: 15 DegreesC; Dew: 14 DegreesC

Wind speed point: 3 knots; Cloud cover: 1/8 Ci; Temperature: 8 DegreesC; Dew: 7 DegreesC

Wind speed point: 2 knots; Cloud cover: NIL; Temperature: -2 DegreesC; Dew: -3 DegreesC

158. 49135 Turbulent clouds are most serious from the icing standpoint because:

Strong vertical currents mean that a predominance of large super-cooled water droplets will be present

Strong vertical current mean that a predominance of small super-cooled water droplets will be present

Turbulent clouds produce hail which sticks to the aircraft

Turbulent clouds indicate a low freezing level

159. 47170 Convective clouds; which penetrate a stratus layer; can produce which threat to instrument flight?

Freezing rain

Clear air turbulence

Embedded thunderstorms

160. 49266 With a clear night sky; the temperature change with height by early morning is most likely to show:

A steady lapse rate averaging 2 DegreesC per 1000 ft

A stable lapse rate of 1 DegreesC per 1000 ft

An inversion above the surface with an isothermal layer above

An inversion from near the surface and a 2 DegreesC per 1000 ft lapse rate above

161. Refer to the picture.The names of the air masses indicated A; B; C and D are respectively:

Polar maritime; polar continental; tropical maritime; tropical continental

Returning polar maritime; Arctic; tropical continental; tropical maritime

Polar maritime; arctic; tropical continental; tropical maritime

Polar maritime; arctic; polar continental; tropical maritime

162. 49154 When considering the actual tropopause which statement is correct:

It is low over the poles and high over the equator

It is high over the poles and low over the equator

It is the same height of 36090 ft all over the world

It is at a constant altitude of 26000

163. 47291 Refer to the attached figure.What is meant by the 350 sign on the significant weather map?

There is icing at stop location at FL 350

The tropopause level

There is turbulence at spot location at FL 350

None of the above

164. 49224 Katabatic wind can result in:

An increase in temperature

Fog in the valley at night

Thunderstorms in summer

Stratus cloud

165. 47145 One of the most dangerous features of mountain waves is the turbulent area. Where the turbulence is most severe?

At mountaintop levels only

Above mountain top levels

At or below mountain top levels

None of the Above

166. 49262 In the troposphere:

Over cold air; the pressure is higher at upper levels than at similar levels over warm air

Over cold air; the pressure is lower at upper levels than at similar levels over warm air

Over warm air; the pressure is lower at upper levels than at similar levels over warm air

The upper level pressure depends solely on the relative humidity below

167. 49205 Which statement is correct when considering the lower layers of the atmosphere:

The majority of the weather is contained in the stratosphere and its upper boundary is the tropopause

The majority of the weather is contained in the troposphere and its upper boundary is the tropopause

The majority of the weather is contained in the tropopause and its upper boundary is the troposphere

The majority of the weather is contained in the troposphere and its upper boundary is the stratosphere

168. 49263 Subsidence in an anticyclone produces:

Saturated air and an inversion

Dry air and an inversion

Isothermal dry and stable air

Increased pressure at the surface

169. 49133 When_______ moist air passes over a surface; which is_ than the dew point of the air;_ fog can form. This occurs ____over

Cool; warmer; radiation; the sea

Warm; cooler; radiation; the land only

Cool; warmer; frontal; land

Warm; cooler; advection; land and sea

170. 49232 intensity of precipitation is described as either

Intermittent; continuous or showery

Drizzle; rain or snow

Slight; moderate or heavy

Intermittent; moderate or heavy

171. 49287 When approachinq at flight level 300 a cumulonimbus cloud with an anvil top; pilots should aim to avoid the cloud by _ NM horizontally if avoidina visually; or by NM horizontallv if usina cloud avoidance radar.Select the appropriate resoective ranaes from those given below:

10; 20

15; 10

10; 15

5; 10

172. 49143 Northern Hemisphere summers tend to be:

Warmer than the southern hemisphere and winters are warmer too

Colder than the southern hemisphere due to the smaller amount of solar radiation

Colder than the southern hemisphere because of the large land masses

Warmer than the southern hemisphere and the winters are colder

173. 49343 Mixed [rime and clear] icing is most likely to be encountered:

In nimbostratus at a temperature of -10 DegreesC

In stratocumulus cloud at a temperature of -20 DegreesC

In fair weather cumulus at a temperature of -15 DegreesC

In towering cumulus at a temperature of -10 DegreesC

174. 47178 Atmospheric pressure changes due to a thunderstorm will be at the lowest value

During the downdraft and heavy rain showers

When the thunderstorm is approaching

Immediately after the rain showers have stopped

175. 49196 In comparison with a primary depression a secondary depresson is:

Always more active

Sometimes more active

Never more active

Unlikely to produce gale force winds

176. 47177 Where can the maximum hazard zone caused by wind shear associated with a thunderstorm be found?

In front of the thunderstorm cell [anvil side] and on the southwest side of the cell

Ahead of the roll cloud or gust front and directly under the anvil cloud

On all sides and directly under the thunderstorm cell

177. 49271 Neutral equilibrium in the atmosphere occurs when:

There is a thin stable layer at low levels but a much thicker unstable layer aloft

178. 47158 Which process causes adiabatic cooling?

Expansion of air as it rises

Movement of air over a colder surface

Release of latent heat during the vaporization process

179. 47149 What is a feature of a stationary front?

The warm front surface moves about half the speed of the cold front surface

Weather conditions are a combination of strong cold front and strong warm front weather

Surface winds tend to flow parallel to the frontal zone

None of the Above

180. 49158 A small low established within the circulation of another low is called

A trough

A col

An anticyclone

A secondary depression

181. 47129 Your altimeter is set correctly while cruising at FL 290. However; you fail to reset it to the local altimeter setting of 30.08' during descent.Assuming a properly functioning altimeter and a field elevation of 2; 150 feet; approximately what will the altimeter indicate after landing?

2;000 feet

2;130 feet

2;170 feet

2;500 feet

182. 47133 The strongest wind velocities of the jet stream will be found:

On the warm side

At the lower levels in winter

In the core at higher levels in winter

None of the Above

183. 49240 Orographic uplift in stable conditions gives a strong vertical component to air movement thus supporting larger super-cooled droplets in orographically formed cloud. Consideration should also be given to the fact that in this cloud:

The 0 DegreesC isotherm will be higher

The 0 DegreesC isotherm will be lower

The lapse rate will be isothermal

An inversion can be anti-cyclonic

184. 47152 What minimum thickness of cloud layer is indicated if precipitation is reported as light or greater intensity?

4000 feet thick

2000 feet thick

A thickness; which allows the cloud; tops to be higher than the freezing level

None of the Above

185. 47139 Where can the maximum hazard zone caused by wind shear associated with a thunderstorm be located?

In front of the thunderstorm cell [anvil side] and on the southwest side of the cell

Behind the thunderstorm cell; near the roll cloud

On all sides and directly under the thunderstorm cell

None of the Above

186. 49100 The tropopause is:

The line where the temperature no longer decreases with increase of height

The layer between the tropopause and the stratosphere

The layer beyond which only CT cloud occurs

The line indicating clear air turbulence

187. 47283 What is the meaning of the coded form M02/M05 in the weather report for LOWL at 070650Z?

The actual temperature is -2 DegreesC and the dew point temperature is -5 DegreesC

The actual temperature is -5 DegreesC and the dew point temperature is -2 DegreesC

The actual temperature is -2 DegreesC and the difference between the actual temperature and the dew point is -5 DegreesC

188. 49173 Flight east bound over the North Atlantic in winter at the 200 mb level will on average experience a tailwind of:

100 knots

80 knots

50 knots

70 knots

189. 49108 If temperature remains constant with an increase in altitude there is:

An inversion

An inversion aloft

Uniform lapse rate

An isothermal layer

190. 47138 Which statement about low-level wind shear; as it relates to frontal activity; is correct?

With a warm front; the most critical period is before the front passes the airport

With a cold front; the problem ceases to exist after the front passes the airport

With a cold front; the most critical period is just before the front passes the airport

None of the Above

191. 49352 Flying conditions in a secondary low pressure system are:

Always more severe than in a primary low

Sometimes more severe than in a primary low

Less severe than in a primary low

Relatively calm

192. 49330 In the Southern hemisphere the 2000 ft W/V is 000/30; the wind at 8000' is 325/35.In these conditions the isotherms of mean temperature will increase from:

North to south

South to north

East to west

West to east

193. 49333 When the met observer reports the amount of cloud present at a station; it will be given as:

Clear; scattered; broken; or overcast

The amount of clouds; in thenths of the sky covered; using the term oktas

The amount of clouds; in quaters of the sky covered; using the term oktas

The amount of clouds; in eights of the sky covered; using the term oktas

194. 49178 Clouds formed by convection will always:

Be layer clouds

Be CU; CB or NS

Have a rising cloud base and may develop into CB as the day progresses

Form only in Polar maritime air

195. 49181 Thunderstorms require a trigger action to release the conditional instability. Which of the following would be the least suitable as a trigger?

Convergence in temperate latitude

Convergence is tropical latitude

Subsidence in tropical latitude

Convection in polar latitude

196. 49182 During the_ stage of a thunderstorm cell; the cloud contains__ .Complete the above statement correctly using one of the following:

Building/up currents and down currents

Mature/up currents and down currents

Dissipating/up currents and down currents

Building/down current only

197. 47171What is indicated by the term 'embedded thunderstorms'?

Severe thunderstorms are embedded in a squall

Thunderstorms are predicted to develop in a stable air mass

Thunderstorms are obscured by other types of clouds

198. 49183 Advection foq is formed when ____ air moves over a _surface and is _______ its dew point:

Humid; cold; kept above

Warm moist; cooler; cooled below

Dry; frozen; well below

Warm moist; warmer; kept above

199. 47162 How can the stability of the atmosphere be determined?

Ambient temperature lapse rate

Atmospheric pressure at various levels

Surface temperature/dewpoint spread

200. 49190 If air in transit is heated from below it tends to become more:

Stable

Neutrally stable

Unstable

None of the above

Meteorology

1. 49264 With an anticyclone over the Europe the expected weather is:

2.

What first name or nickname would you like us to use?

2. 49130 Hazards of the mature stage of a TS cell include lightning; turbulence and:

3. 49265 Refer to the picture.The pressure systems at A2; B1; B2; B3; and C2 are respectively:

4. Refer to the picture. Precipitation at the surface underneath B is likely to be:

5. 49099 The international standard atmosphere assumes a lapse rate of:

6. 49209 The aircraft altimeter will read zero at aerodrome level with which pressure setting set on the altimeter sub scale:

7. 49211 Generally as altitude increases:

8. 49212 A trough of low pressure is:

9. 49136 Hoar frost forms on an aircraft when:

10. 49285 The type of precipitation in which visibility is likely to be most reduced:

11. Refer to appendix A-4A. The cloud in grid square S8 is most likely to be:

12. 49288 A microburst usually lasts for_________________ and is about______________ across.

13. 49139 Refer to appendix A-4A. Precipitation will reach the ground mainly in the area:

14. 49290 _____________ forms when moist air_________________ over a surface which is__________ than the dew point of the air. Fill in the missing 3 from the list given below:

15. 49234 The following is unlikely to be hazard below a thunderstorm:

16. 49291 Advection fog:

17. Refer to appendix A-4A. In grid square M6 the worst cloud conditions for flying could be:

18. 49235 thunderstorms are likely if

19. 49293 Flying 50 NM ahead of a warm front out of cloud at 1000 ft in winter; with an ambient temperature of -8 DegreesC; there is a strong risk of:

20. 49141 Tropical revolving storms usually:

21. 49142 With reference to tropical revolving storms; which of the following statements is correct?

22. 47280 The visibility and significant present weather as reported for LRBS at 070630Z is:

23. 47156 How are hazes layers cleared or dispersed? By:

24. 47164 What feature is associated with a temperature inversion?

25. 47173 Why are downdrafts in a mature thunderstorm hazardous? They:

26. 49297 With a cold occlusion:

27. 47168 If the ambient temperature is warmer than standard at FL350; what is the density altitude compared to pressure altitude?

28. 49102 The barometric Pressure at the airfield datum point is known as:

29. 47191 Where is the normal location of the jetstream relative to surface lows and fronts?

30. 49196 In comparison with a primary depression a secondary depression is:

31. 47295 Refer to Sig.Wx chart.The weather phenomena expected in area 3 is:

32. 47157 Which term applies when the temperature of the air changes by compression or expansion with no heat added or removed?

33. 47169 Which pressure is defined as station pressure?

34. 47172 What feature is normally associated with the cumulus stage of a thunderstorm?

35. Refer to the picture. The relative temperatures at A; B and C could be respectively:

36. 49347 When a cold front passes a Station in Israel:

37. 49349 Refer to the picture.flight conditions at B are likely to be:

38. 49351 A warm occlusion occurs when:

39. 49214 An inversion is one in which:

40. 47154 Which type clouds are indicative of very strong turbulence?

41. 47186 What is a characteristic of the troposphere?

42. Refer to the picture.The names of the air masses indicated E; F; G and H are respectively:

43. 49147 The large change in the direction of trade winds is caused by:

44. Refer to the picture.In area M in the winter there will be:

45. 49148 Refer to appendix A-5C. In area Q the climate will include:

46. 49269 The wet bulb temperature:

48. 49303 Refer to the picture.The cloud to be expected along the front at A2 is:

49. 49270 If the temperature near the surface in Hong Kong is +31 DegreesC then rising saturated air will cool at a rate of:

50. 49218 If the dry bulb temperature at the surface is +7.5 DegreesC and the observed temperature at 4000 ft is +5.5 DegreesC; the air could be best described as:

51. 47153 What is the lowest cloud in the stationary group associated with a mountain wave?

52. 47144 Which conditions are most conductive to the formation of radiation fog?

53. 47131 Which type of jet stream can be expected to cause the greater turbulence?

54. 49156 The QFF is the atmospheric pressure:

55. 47134 What is correct about structural icing in flight?

56. 49159 An area of indeterminate pressure between two lows and two highs is called:

57. 47141 Which weather phenomenon signals the beginning of the mature stage of a thunderstorm?

58. 49161 The instrument used for measuring the humidity of air is a:

59. 49200 Near the equator upper winds tend to be:

60. 49308 QNH at Johannesburg is 1025 hpa; elevation is 1600m AMSL. What is the QFE. [Assume 1 mb = 8m]

61. 49201 The polar front is:

62. 49309 Which of the following statements is most correct when describing ISA:

63. 49104 The pressure of the atmosphere:

64. 47140 Which thunderstorms generally produce the most severe conditions; such as heavy hail and destructive winds?

65. 49241 Which of the following conditions is most favorable for the formation of carburetor icing if the aircraft is descending with glide power set:

66. 49151 The captain of an aircraft needs to know the height of the Tropopause because:

67. 49165 The DALR is greater than the SALR because:

68. 49106 A trough of low pressure is generally associated with:

69. 49221 Refer to the picture.Flight conditions at B1 are likely to be:

70. 47127 What is the cyclostrophic wind?

71. 47284 What is the meaning of the coded form M03/M04 in the weather report for LFBD at 070630?

72. 49222 Refer to appendix A-l. The most extreme turbulence can occur:

73. 47132 What action is recommended; if possible; regarding a course change; if jet stream turbulence is encountered [a jet stream is encountered [with a direct headwind or tailwind]?

74. 49170 The surface wind direction in the Northern Hemisphere is backed from the 2000 ft wind by an average of 30 Degrees over land due to:

75. 49203 The Altimeter will always read

76. 49223 The significance of lenticular cloud is:

77. 49171 When a Fohn wind occurs:

78. 49245 Refer to the picture.What type of cloud will be found at X

12. 49288 A microburst usually lasts for___ and is about across.

14. 49290 _____ forms when moist air_ over a surface which is__ than the dew point of the air. Fill in the missing 3 from the list given below:

86. 47331 Pressure will with increase of height and will be about at 10000 ft ___ at 30000 ft.

92. 49110 During a night with a clear sky; surface temperature will _. RH will and dew point will ___

97. 49322 When condensation takes place; the higher the temperature the __ the amount of latent heat _

99. 49338 hunderstorms caused by__________ are most common in the summer and by_in the _______