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050 Meteorology

050 Meteorology

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When compared to the geostrophic wind in the northern hemisphere, surface friction will cause the surface wind to:

back and decrease.

veer and decrease.

back and increase.

veer and increase.

Which of the following choices lists only main cloud genera that are mostly the clue for an unstable thermal stratification in the atmosphere?

Stratocumulus, altostratus, cirrus.

❌

Cirrocumulus, altostratus, stratocumulus.

❌

Cirrostratus, altostratus, stratus.

❌

Cirrocumulus, altocumulus, cumulus.

✅

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Which of the following statements is correct regarding the cooling/warming of the Earth's surface by radiation?

Cloud cover has NO effect on the amount of the Sun's radiated heat arriving at the Earth's surface.

The Earth only radiates heat into space between sunset and sunrise.

The Earth is heated by short-wave radiation from the Sun, but cooled by its own long-wave radiation into space.

The Earth is heated by long-wave radiation from the Sun, but cooled by its own short-wave radiation into space.

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Precipitation in the form of showers occurs mainly from:

clouds containing only ice crystals.

cirro-type clouds.

convective clouds.

stratified clouds.

Which of the following sets of conditions are most likely to lead to the formation of advection fog?

Clear skies at night over an inland marshy area

❌

A mild moist airstream flowing over colder surfaces with a wind in excess of 30 kt

❌

Cold maritime air flowing over a warmer land surface at a speed greater than 15 kt

❌

A mild moist airstream flowing over colder surfaces with the wind speed less than 15 kt

✅

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What happens as air is cooled to below its dew point temperature?

The saturated water vapor content increases as precipitation takes place when the temperature drops.

❌

The actual water vapor content decreases to remain equal to the saturated water vapor content.

✅

The saturated water vapor content remains constant as the air is at 100% relative humidity.

❌

The actual water vapor content increases to remain equal to the saturated water vapor content.

❌

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What type of cloud is being described? A generally grey cloud layer with fairly uniform base and uniform appearance,

which may give drizzle or snow grains. When the sun is visible through the cloud, the outline is clearly discernible.

Sometimes it appears in the form of ragged patches.

Cirrostratus

stratus

Nimbostratus

Altostratus

When en-route and maintaining a constant flight level, how can you correctly describe the relationship between the true altitude and changes to the atmospheric pressure?

As pressure decreases the true altitude decreases.

As pressure increases the true altitude decreases.

At a constant flight level, variations in pressure do NOT affect the true altitude.

As pressure decreases the flight level will increase and true altitude will increase.

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

50% oxygen, 40% nitrogen, and the rest other gases.

10% oxygen, 89% nitrogen, and the rest other gases.

21% oxygen, 78% nitrogen, and the rest other gases.

88% oxygen, 9% nitrogen, and the rest other gases.

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Which FL corresponds with the 500 hPa pressure level?