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Quiz on ATPL THEORY - METEOROLOGY (1), created by mathys1995 on 18/08/2015.

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ATPL THEORY - METEOROLOGY (1)

Question 1 of 37

1

Which one of the following statements applies to the tropopause?

Select one of the following:

  • It is, by definition, an isothermal layer.

  • It indicates a strong temperature lapse rate.

  • It is, by definition, a temperature inversion.

  • It separates the troposphere from the stratosphere.

Explanation

Question 2 of 37

1

At a certain position, the temperature on the 300 hPa chart is -48°C; according to the tropopause chart, the tropopause is at FL330. What is the most likely temperature at FL350?

Select one of the following:

  • -54°C

  • -50°C

  • -56.5°C

  • -58°C

Explanation

Question 3 of 37

1

The tropopause is lower...

Select one of the following:

  • south of the equator than north of it.

  • over the equator than over the South Pole.

  • over the North Pole than over the equator.

  • in summer than winter in moderate latitudes.

Explanation

Question 4 of 37

1

What is the most likely temperature at the tropical tropopause?

Select one of the following:

  • -55°C

  • -35°C

  • -25°C

  • -75°C

Explanation

Question 5 of 37

1

Which statement is correct regarding the International Standard Atmosphere?

Select one of the following:

  • At MSL temperature is 15°C and the decrease in temperature with height is 1°C per 100m.

  • At MSL temperature is 10°C and the decrease in temperature with height is 1°C per 100m.

  • At MSL pressure is 1013.25 hPa and the decrease of temperature with height is 1°C per 100m.

  • At MSL temperature is 15°C and pressure is 1013.25hPa.

Explanation

Question 6 of 37

1

The tropopause is a level at which...

Select one of the following:

  • water vapour content is greatest.

  • pressure remains constant.

  • vertical currents are strongest.

  • temperature ceases to fall with increasing height.

Explanation

Question 7 of 37

1

The 0°C isotherm is forecast to be at FL050. At what FL would you expect a temperature of -6°C?

Select one of the following:

  • FL080

  • FL020

  • FL100

  • FL110

Explanation

Question 8 of 37

1

How does temperature vary with increasing altitude in the ICAO standard atmosphere below the tropopause?

Select one of the following:

  • It increases.

  • At first it increases and higher up it decreases.

  • It remains constant.

  • It decreases.

Explanation

Question 9 of 37

1

Which is true of the temperature at the tropopause?

Select one of the following:

  • It is higher in polar regions than in equatorial regions.

  • It is higher in equatorial regions than in polar regions.

  • It is highest in middle latitudes.

  • There is no significant difference with change of latitude.

Explanation

Question 10 of 37

1

What is the boundary layer between troposphere and stratosphere called?

Select one of the following:

  • Tropopause

  • Ionosphere

  • Stratosphere

  • Atmosphere

Explanation

Question 11 of 37

1

How would you characterise an air temperature of -15°C at the 700hPa level over Western Europe?

Select one of the following:

  • Low

  • High

  • Within +/-5°C of ISA

  • 20°C below standard

Explanation

Question 12 of 37

1

The temperature at FL110 is -5°C. What will the temperature be at FL050 if the ICAO standard lapse rate is applied?

Select one of the following:

  • +3°C

  • 0°C

  • -3°C

  • +7°C

Explanation

Question 13 of 37

1

How does the height of the tropopause normally vary with latitude in the northern hemisphere?

Select one of the following:

  • It remains constant throughout the year.

  • It decreases from south to north.

  • It remains constant from north to south.

  • It increases from south to north.

Explanation

Question 14 of 37

1

The temperature at FL080 is +6°C. What will the temperature be at FL130 if the ICAO standard lapse rate is applied?

Select one of the following:

  • +2°C

  • -4°C

  • -6°C

  • 0°C

Explanation

Question 15 of 37

1

What is the lowest assumed temperature in the ICAO Standard Atmosphere?

Select one of the following:

  • -273°C

  • -44.7°C

  • -100°C

  • -56.5°C

Explanation

Question 16 of 37

1

The troposphere is the...

Select one of the following:

  • part of the atmosphere below the tropopause.

  • part of the atmosphere above the stratosphere.

  • boundary between the mesosphere and thermosphere.

  • boundary between the stratosphere and the mesosphere.

Explanation

Question 17 of 37

1

How would you characterise an air temperature of -55°C at the 200hPa level over Western Europe?

Select one of the following:

  • Within +/-5°C of ISA

  • High

  • Low

  • Very high

Explanation

Question 18 of 37

1

The height and the temperature of the tropopause are respectively in the order of...

Select one of the following:

  • 8 km and -40°C over the equator.

  • 8 km and - 75°C over the poles.

  • 16 km and -40°C over the poles.

  • 16 km and -75°C over the equator.

Explanation

Question 19 of 37

1

What of the following is the most important constituent in the atmosphere from a weather stand-point?

Select one of the following:

  • Nitrogen

  • Oxygen

  • Hydrogen

  • Water vapour

Explanation

Question 20 of 37

1

What is the vertical temperature lapse rate, up to 11km, in the ICAO standard atmosphere?

Select one of the following:

  • 6.5°C per 1000m

  • 4.5°C per 1000m

  • 3°C per 1000m

  • 2°C per 1000m

Explanation

Question 21 of 37

1

An outside air temperature of -35°C is measured while cruising at FL200. What is the temperature deviation from the ISA at this level?

Select one of the following:

  • 10°C warmer than ISA

  • 5°C warmer than ISA

  • 5°C colder than ISA

  • 10°C colder than ISA

Explanation

Question 22 of 37

1

How would you characterise an air temperature of -30°C at the 300hPa level over Western Europe?

Select one of the following:

  • Within +/-5°C of ISA

  • Low

  • Very low

  • High

Explanation

Question 23 of 37

1

What is the rate of decrease of temperature with height per 100m in the International Standard Atmosphere?

Select one of the following:

  • 0.65°C

  • 1°C

  • 0.5°C

  • Variable

Explanation

Question 24 of 37

1

What is the approximate composition of the dry air by volume in the troposphere?

Select one of the following:

  • 50% oxygen, 40% nitrogen, and the rest other gasses

  • 21% oxygen, 78% nitrogen, and the rest other gasses

  • 10% oxygen, 89% nitrogen, and the rest other gasses

  • 88% oxygen, 9% nitrogen, and the rest other gasses

Explanation

Question 25 of 37

1

If you are flying at FL300 in an air mass that is 15°C warmer than a standard atmosphere, what is the outside temperature likely to be?

Select one of the following:

  • -15°C

  • -30°C

  • -45°C

  • -60°C

Explanation

Question 26 of 37

1

A temperature of +15°C is recorded at an altitude of 500m above sea level. If the vertical temperature gradient is that of a standard atmosphere, what will the temperature be at the summit of a mountain, 2500m above sea level?

Select one of the following:

  • +4°C

  • 0°C

  • -2°C

  • +2°C

Explanation

Question 27 of 37

1

The temperature at FL140 is -12°C. What will the temperature be at FL110 if the ICAO standard lapse rate is applied?

Select one of the following:

  • -15°C

  • -6°C

  • -18°C

  • -9°C

Explanation

Question 28 of 37

1

If you are flying at FL120 and the outside temperature is -2°C, at what altitude will the "freezing level" be?

Select one of the following:

  • FL150

  • FL090

  • FL110

  • FL130

Explanation

Question 29 of 37

1

The troposphere...

Select one of the following:

  • reaches the same height at all latitudes.

  • has a greater vertical extent above the equator than above the poles.

  • contains all oxygen of the stratosphere.

  • is the separation layer between the stratosphere and atmosphere.

Explanation

Question 30 of 37

1

The thickness of the troposphere varies with...

Select one of the following:

  • rotation of the Earth.

  • the wind.

  • latitude.

  • longitude.

Explanation

Question 31 of 37

1

What, approximately, is the average height of the tropopause over the equator?

Select one of the following:

  • 16km

  • 8km

  • 11km

  • 40km

Explanation

Question 32 of 37

1

Going from the equator to the North Pole, the altitude of the tropopause...

Select one of the following:

  • decreases and its temperature increases.

  • increases and its temperature increases.

  • increases and its temperature decreases.

  • decreases and its temperature decreases.

Explanation

Question 33 of 37

1

What is the temperature at 10,000ft in the International Standard Atmosphere?

Select one of the following:

  • -20°C

  • -35°C

  • -5°C

  • 0°C

Explanation

Question 34 of 37

1

What, approximately, is the average height of the tropopause at 50°N?

Select one of the following:

  • 14km

  • 16km

  • 11km

  • 8km

Explanation

Question 35 of 37

1

In the lower part of the stratosphere, the temperature...

Select one of the following:

  • increases with altitude.

  • increases at first and decreases afterward.

  • is almost constant.

  • decreases with altitude.

Explanation

Question 36 of 37

1

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

Select one of the following:

  • Troposphere

  • Lower stratosphere

  • Upper stratosphere

  • Ionosphere

Explanation

Question 37 of 37

1

In the mid-latitudes the stratosphere extends on an average from...

Select one of the following:

  • 85 to more than 200km.

  • 11 to 50km.

  • 0 to 11km.

  • 50 to 85km.

Explanation

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