Vayudoot Aviation

1.
Which of the following statements is true regarding moderate-to-severe airframe icing?

It always occurs in altostratus cloud

It is likely to occur in nimbostratus cloud

It will occur in clear-sky conditions

It may occur in the uppermost levels of a cumulonimbus capillatus formation

2.
When planning a flight at FL 60, which upper wind and temperature chart would be nearest your flight level ?

850 hPa

300 hPa

500 hPa

700 hPa

3.
Two aircraft, one with a sharp wing profile (S), and the other with a thick profile (T), are flying through the same cloud with same true airspeed. The cloud consists of small supercooled droplets. Which of the following statements is most correct concerning ice accretion ?

Aircraft T experiences more icing than S.

Neither of the aircraft accumulate ice due to the small size of droplets.

Aircraft S and T experience the same amount of icing

Aircraft S experiences more icing than T.

4.
QNH is defined as

QFE reduced to MSL using the values of the standard atmosphere

QFE reduced to MSL using the values of the actual atmosphere

pressure at MSL in the actual atmosphere

QFE reduced to MSL using the values of the actual atmosphere

5.
During which months is the Hurricane season in the Caribbean?

July until November.

April until July.

January until April.

October until January.

6.
At which airport, is the following weather development taking place? TAF 060716 25006KT 8000 BKN240 BECMG 0710 OVC200 BECMG 1013 23010KT 8000 OVC100 BECMG 1316 23014KT 6000 RA SCT030 OVC050 =

LOWW

EDDL

LEMD

LFPO

7.
The weather most likely to be experienced at position ""R"" is

increasing high and medium cloud cover and generally good visibility

mainly overcast with anticyclonic gloom

fine and warm with little or no cloud

early morning fog lifting to low stratus

8.
What are the characteristics of cumuliform clouds?

Small water droplets, stability, no turbulence and extensive areas of rain.

Large water droplets, stability, no turbulence, showers and mainly rime ice.

Small water droplets, instability, turbulence, extensive areas of rain and rime ice.

Large water droplets, instability, turbulence, showers and mainly clear ice.

9.
The Foehn wind is a

warm anabatic wind

cold fall wind

cold anabatic wind

warm fall wind

10.
A blocking anticyclone on the northern hemisphere is

a warm anticyclone/quasi stationary/situated between 50°N and 70°N

situated between 50° and 70°N/a cold anticyclone/steering depressions

quasi stationary/situated between 50°N and 70°N/a cold anticyclone

a cold anticyclone/steering depressions/situated over Scandinavia

11.
The equatorial easterly jet is a jet stream that occurs

only in the winter of the northern hemisphere at approx. 30 000 FT

during the whole year in the northern hemisphere

only in the summer of the northern hemisphere at approx. 45 000 FT

during the whole year in the southern hemisphere

12.
What type of cloud can produce hail showers?

CS

AC

NS

CB

13.
In which of the following METAR reports, is the probability of fog formation in the coming night the highest?

1850Z 21003KT 8000 SCT250 12/m08 Q1028 NOSIG =

1850Z 15003KT 6000 SCT120 05/04 Q1032 BECMG 1600 =

1850Z 06018G30KT 5000 OVC010 04/01 Q1024 NOSIG =

1850Z 25010KT 4000 RA BKN012 OVC030 12/10 Q1006 TEMPO 1500 =

14.
Generally northern hemisphere winds at 5000 FT/AGL are southwesterly while most of the surface winds are southerly. What is the primary reason of difference between these two wind directions?

Friction between the wind and the surface.

The influence of warm air at the lower altitude.

Stronger Coriolis force at the surface.

A strong pressure gradient at higher altitudes.

15.
What process in an air mass leads to the creation of wide spread NS, AS and ST cloud coverage?

Convection process

Sinking

Lifting

Radiation

16.
What degree of turbulence, if any, is likely to be encountered while flying through a cold front in the summer over Central Europe at FL 100?

Light turbulence in CB cloud.

Moderate turbulence in NS cloud.

Light turbulence in ST cloud.

Severe turbulence in CB cloud.

17.
In which of the following bands of latitude is the intertropical convergence zone most likely to be encountered in January, between Dakar and Rio de Janeiro?

7° - 12°N.

0° - 7°N.

8° - 12°S.

3° - 8°S.

18.
What cloud cover is typical for a wide warm sector of a polar front depression over Central Europe in the summer ?

ST with drizzle

Fair weather CU

BKN CU and CB

Sky clear

19.
What does the symbol indicate on a significant weather chart?

The center of a tropopause ""high"", where the tropopause is at FL 400.

The upper limit of significant weather at FL 400.

The lower limit of the tropopause.

The center of a high pressure area at 400 hPa.

20.
The validity of a TAF is

2 hours

9 hours from the time of issue

stated in the TAF

between 6 and 9 hours

21.
Which of the following is typical for the passage of a cold front in the summer ?

Rapid drop in pressure once the front has passed

Mainly towering clouds

Mainly layered clouds

Rapid increase in temperature once the front has passed

22.
Which weather phenomena are typical for the northern side of the Alps with stormy winds from the south (Foehn)?

Continuous precipitation, severe turbulence.

Icing, huge mass of clouds.

Good visibility, turbulence.

Decrease in temperature, moderate to severe icing.

23.
You intend to carry out a VFR flight over the Alps, on a hot summer day, when the weather is unstable. What is the best time of day to conduct this flight?Morning

Morning.

Early evening.

Afternoon.

Mid-day.

24.
Refer to the following TAF extract:BECMG 1821 2000 BKN004 PROB30 BECMG 2124 0500 FG VV001What visibility is forecast for 2400 UTC?

500 m.

2000 m.

Between 0 m and 1000 m.

Between 500 m and 2000 m.

25.
What is the main cause for the formation of a polar front jet stream?

Strong winds in the upper atmosphere

The pressure difference, close to the ground, between a high over the Azores and a low over Iceland

The north-south horizontal temperature gradient at the polar front

The varied elevations of the tropopause in the polar front region

26.
With what type of clouds are showers most likely associated?

Nimbostratus.

Stratocumulus.

Stratus.

Cumulonimbus.

27.
On which of the following aviation weather charts can a pilot most easily find a jetstream?

Wind / temperature chart.

Upper air chart.

Surface chart.

Significant weather chart.

28.
A Foehn wind occurs on the

windward side of a mountain range and is caused by surface heating

leeward side of a mountain range and is caused by significant moisture loss by precipitation from cloud

leeward side of a mountain range and is caused by the condensation level being lower on the leeward side than on the windward side

windward side of a mountain range and is caused by surface cooling and reverse air flow

29.
What prevents air from flowing directly from high-pressure areas to low-pressure areas ?

Coriolis force

The pressure gradient force

Surface friction

Katabatic force

30.
Which of the following weather conditions favour the formation of radiation fog?

Light wind, little or no cloud, moist air.

Light wind, extensive cloud, moist air.

Strong wind, little or no cloud, moist air.

Light wind, extensive cloud, dry air.

31.
What type of fog is most likely to form over flat land during a clear night, with calm or light wind conditions ?

Orographic.

Steam.

Advection.

Radiation.

32.
In the northern hemisphere the wind at the surface blows

counter-clockwise around, and away from the centre of, a high pressure area.

clockwise around, and away from the centre of, a low pressure area

from a low pressure area to a high pressure area

counter-clockwise around, and toward the centre of, a low pressure area

33.
Which of the following meteorological phenomena can rapidly change the braking action of a runway?

HZ

FG

MIFG

#NAME?

34.
What type of clouds are associated with snow showers ?

Cumulus and altostratus

Nimbostratus

Altostratus and stratus

Cumulus and cumulonimbus

35.
Which layer of the atmosphere contains more than 90 per cent of all water vapour?

Lower stratosphere

Ionosphere

Troposphere

Upper stratosphere

36.
In the lower layers of the atmosphere due to friction the wind changes direction towards the low pressure area because

turbulence is formed and pressure increases

turbulence is formed and pressure decreases

wind speed decreases and therefore coriolis force decreases

the pressure gradient increases

37.
Which of the following is a cause of stratus forming over flat land?

Convection during the day.

The release of latent heat.

Radiation during the night from the earth surface in moderate wind.

Unstable air.

38.
How do air masses move at a warm front ?

Warm air overrides a cold air mass

Warm air undercuts a cold air mass

Cold air overrides a warm air mass

Cold air undercuts a warm air mass

39.
Which of the following statements is an interpretation of the SIGMET ?LSAW SWITZERLAND 0307 SIGMET 2 VALID 030700/031100 LSSW mod to sev cat fcst north of alps btn fl 260 and fl 380 / stnr / intsf =

Zone of moderate to severe turbulence moving towards the area north of the Alps. Intensity increasing. Pilots advised to cross this area above FL 260

Moderate to strong clear air turbulence of constant intensity to be expected north of the Alps

Moderate to severe clear air turbulence to be expected north of the Alps. Intensity increasing. Danger zone between FL 260 and FL 380

Severe turbulence observed below FL 260 north of the Alps. Pilots advised to cross this area above FL 380

40.
At what degree of icing can ICAO's

Light

Moderate

Extreme

Severe

41.
What is the average height of the jet core within a polar front jet stream?

30000 FT.

50000 FT.

40000 FT.

20000 FT.

42.
How long from the time of observation is a TREND in a METAR valid?

30 minutes.

1 hour.

2 hours.

9 hours.

43.
The dewpoint temperature

can not be equal to the air temperature

is always lower than the air temperature

is always higher than the air temperature

can be equal to the air temperature

44.
What will be the effect on the reading of an altimeter of an aircraft parked on the ground shortly before an active cold front passes?

It will be increasing

It will be decreasing.

It will fluctuate up and down by about +/- 50 feet

It will remain unchanged.

45.
The wind direction in a METAR is measured relative to

grid north

true north

magnetic north

the 0-meridian

46.
What is the most significant difference between an equatorial jet stream and all the other jet streams ?

Vertical dimension.

Windspeed.

Horizontal dimension.

Wind direction.

47.
The Bora is a

cold catabatic wind with the possibility of violent gusts

cold catabatic wind always associated with clouds and heavy showers

cold catabatic wind with gusts associated with a maritime air mass

squally warm catabatic wind which occurs mainly in summer

48.
What will be the effect on the reading of an altimeter of an aircraft parked on the ground during the period following the passage of an active cold front ?

It will show a small increase or decrease

It will have increased.

It will have decreased

It will remain unchanged

49.
What are squall lines?

The surface weather associated with upper air troughs.

Unusual intensive cold fronts.

Bands of intensive thunderstorms

The paths of tropical revolving storms.

50.
Relative humidity

is not affected when air is ascending or descending.

changes when water vapour is added, even though the temperature remains constant.

does not change when water vapour is added provided the temperature of the air remains constant.

not affected by temperature changes of the air.

Question Bank

Questions for INDIGO METEOROLOGY(3272-4089)

Which of the following statements is true regarding moderate-to-severe airframe icing?

When planning a flight at FL 60, which upper wind and temperature chart would be nearest your flight level ?

Two aircraft, one with a sharp wing profile (S), and the other with a thick profile (T), are flying through the same cloud with same true airspeed. The cloud consists of small supercooled droplets. Which of the following statements is most correct concerning ice accretion ?

QNH is defined as

During which months is the Hurricane season in the Caribbean?

At which airport, is the following weather development taking place? TAF 060716 25006KT 8000 BKN240 BECMG 0710 OVC200 BECMG 1013 23010KT 8000 OVC100 BECMG 1316 23014KT 6000 RA SCT030 OVC050 =

The weather most likely to be experienced at position ""R"" is

What are the characteristics of cumuliform clouds?

The Foehn wind is a

A blocking anticyclone on the northern hemisphere is

The equatorial easterly jet is a jet stream that occurs

What type of cloud can produce hail showers?

In which of the following METAR reports, is the probability of fog formation in the coming night the highest?

Generally northern hemisphere winds at 5000 FT/AGL are southwesterly while most of the surface winds are southerly. What is the primary reason of difference between these two wind directions?

What process in an air mass leads to the creation of wide spread NS, AS and ST cloud coverage?

What degree of turbulence, if any, is likely to be encountered while flying through a cold front in the summer over Central Europe at FL 100?

In which of the following bands of latitude is the intertropical convergence zone most likely to be encountered in January, between Dakar and Rio de Janeiro?

What cloud cover is typical for a wide warm sector of a polar front depression over Central Europe in the summer ?

What does the symbol indicate on a significant weather chart?

The validity of a TAF is

Which of the following is typical for the passage of a cold front in the summer ?

Which weather phenomena are typical for the northern side of the Alps with stormy winds from the south (Foehn)?

You intend to carry out a VFR flight over the Alps, on a hot summer day, when the weather is unstable. What is the best time of day to conduct this flight?Morning

Refer to the following TAF extract:BECMG 1821 2000 BKN004 PROB30 BECMG 2124 0500 FG VV001What visibility is forecast for 2400 UTC?

What is the main cause for the formation of a polar front jet stream?

With what type of clouds are showers most likely associated?

On which of the following aviation weather charts can a pilot most easily find a jetstream?

A Foehn wind occurs on the

What prevents air from flowing directly from high-pressure areas to low-pressure areas ?

Which of the following weather conditions favour the formation of radiation fog?

What type of fog is most likely to form over flat land during a clear night, with calm or light wind conditions ?

In the northern hemisphere the wind at the surface blows

Which of the following meteorological phenomena can rapidly change the braking action of a runway?

What type of clouds are associated with snow showers ?

Which layer of the atmosphere contains more than 90 per cent of all water vapour?

In the lower layers of the atmosphere due to friction the wind changes direction towards the low pressure area because

Which of the following is a cause of stratus forming over flat land?

How do air masses move at a warm front ?

Which of the following statements is an interpretation of the SIGMET ?LSAW SWITZERLAND 0307 SIGMET 2 VALID 030700/031100 LSSW mod to sev cat fcst north of alps btn fl 260 and fl 380 / stnr / intsf =

At what degree of icing can ICAO's

What is the average height of the jet core within a polar front jet stream?

How long from the time of observation is a TREND in a METAR valid?

The dewpoint temperature

What will be the effect on the reading of an altimeter of an aircraft parked on the ground shortly before an active cold front passes?

The wind direction in a METAR is measured relative to

What is the most significant difference between an equatorial jet stream and all the other jet streams ?

The Bora is a

What will be the effect on the reading of an altimeter of an aircraft parked on the ground during the period following the passage of an active cold front ?

What are squall lines?

Relative humidity