Met Gen 2 Flashcards
When air ascends, its ability to contain moisture:
A) Increases.
B) Remains unchanged.
C) Initially Increases, Then decreases.
D) Decreases.
D) Decreases.
During the condensation process which of the following is true?
A) The relative humidity of the surrounding air decreases.
B) Latent heat is released to the surrounding air.
C) Latent heat is absorbed from the surrounding air.
D) The condensed water vapor molecules will enter a higher energy state.
B) Latent heat is released to the surrounding air.
When condensation occurs in an unstable air mass, the stability of the air tends to become:
A) More unstable as heat is released to the surrounding air.
B) More stable as heat is released to the surrounding air.
C) More unstable as the surrounding air is cooled from absorption of latent heat.
D) More stable as the surrounding air is cooled from absorption of latent heat.
A) More unstable as heat is released to the surrounding air.
With a surface temperature of 28 degrees C and a dewpoint temperature of 16 degrees C reported at your airport, you would predict the base of any convective cloud might form to be approximately:
A) 7600 ft AGL.
B) 6400 ft AGL.
C) 4900 ft AGL.
D) 2900 ft AGL.
C) 4900 ft AGL.
With respect to a rising parcel of air which commences to ascend from a sea level airport where the temperature is 30 degrees C, what would be its temperature at 14,000 ft above sea level if it became saturated at 6000 ft above sea level?
A) +2
B) 0
C) -1
D) +6
B) 0
When discussing the stability/instability of the atmosphere, we are referring to:
A) The diurnal fluctuations in the height of pressure surfaces aloft.
B) A property of the atmosphere that suppresses or promotes vertical motion.
C) The varying speeds and slopes of frontal surfaces and their effect on the surface temperature field.
D) The effects of macro-scale temperature distribution in the upper tropopause.
B) A property of the atmosphere that suppresses or promotes vertical motion.
The stability of warm, dry air depends on the relationship between the:
A) Saturated adiabatic lapse rate and the dry adiabatic lapse rate.
B) Dry adiabatic lapse rate and the standard lapse rate.
C) Dry adiabatic lapse rate and the environmental lapse rate.
D) Saturated adiabatic lapse rate and the environmental lapse rate.
C) Dry adiabatic lapse rate and the environmental lapse rate.
Stable air is most likely to be associated with:
A) Cold air advecting over a warm surface.
B) Shower precipitation.
C) Gusty winds.
D) Sustained low visibility.
D) Sustained low visibility.
Haze layers, drizzle and fog are features of:
A) Overrunning air.
B) Stable air.
C) A convergence zone.
D) Advection heating of cold air.
B) Stable air.
One weather condition that may affect visibility in unstable air is:
A) Haze layers.
B) Snow showers.
C) Drizzle.
D) Fog.
B) Snow showers.
Stable air becomes unstable as a result of:
A) Subsidence.
B) Radiation Cooling.
C) Addition of moisture.
D) Heating from below.
D) Heating from below.
A good signpost of mid-level instability would be the presence of:
A) Stratocumulus.
B) Cirrocumulus.
C) Altocumulus.
D) Cumulus Fractus.
C) Altocumulus.
Which of the following effectively inhibits or blocks rising air?
A) A frontal depression.
B) A supercooled layer aloft.
C) An inversion.
D) A convergence zone.
C) An inversion.
The pilot of an aircraft would expect the smoothest low level flight during a hot summer afternoon when passing over which of the following surface features?
A) A forest.
B) A plowed field.
C) A lake.
D) A vineyard.
C) A lake.
A pressure of 200hPa is closest to which of the following levels in the ICAO Standard Atmosphere?
A) FL600.
B) FL450.
C) FL390.
D) FL340
C) FL390.
FL450 is associated with which pressure level in the ICAO Standard Atmosphere?
A) 250 hPa.
B) 150 hPa.
C) 200 hPa.
D) 300 hPa.
B) 150 hPa.
The vertical distance between two specific pressure levels is:
A) Greater in cold air than in warm air.
B) Not affected by the temperature of the air.
C) Less in cold air than in warm air.
D) Solely determined by the adiabatic lapse rate.
C) Less in cold air than in warm air.
The height of a pressure level (ex. 500MB) will tend to be found:
A) At a higher level in a colder air mass.
B) At a higher level when the MSL pressure is low.
C) At a lower level in a warmer air mass.
D) At a lower level in a colder air mass.
D) At a lower level in a colder air mass.
The height of a pressure level will:
A) Become lower when a Low is deepening.
B) Become higher when a Low is deepening.
C) Become lower when a Low is filling.
D) Remain unchanged whether a Low is deepening or filling.
A) Become lower when a Low is deepening.
Flying in the lower levels towards the center of an anticyclone which has a strong pressure gradient, a pilot would expect:
A) High winds and increasing barometric pressure.
B) Light winds and relatively constant barometric pressure.
C) Clear weather and relatively low barometric pressure.
D) High winds and decreasing barometric pressure.
A) High winds and increasing barometric pressure.
When flying towards a ridge of high pressure at FL200, what happens to the height of the pressure level and your true altitude?
A) Pressure level goes up and your true altitude goes up.
B) Pressure level goes up and your true altitude goes up.
C) Pressure level goes down and your true altitude goes down.
D) Pressure level goes down and your true altitude goes up.
B) Pressure level goes up and your true altitude goes up.
When flying at FL200 towards an area of colder air on the surface of the earth, what happens to the height of the pressure level and your true altitude.
A) Pressure level goes up and your true altitude goes up.
B) Pressure level goes up and your true altitude goes up.
C) Pressure level goes down and your true altitude goes down.
D) Pressure level goes down and your true altitude goes up.
C) Pressure level goes down and your true altitude goes down.
When flying at FL370 towards a ridge of high pressure and an area of warmer air on the surface of the earth, what happens to your indicated altitude (shown on your altimeter) and your true altitude.
A) Indicated altitude goes up, therefore your true altitude goes up.
B) Indicated altitude goes down, therefore your true altitude goes up.
C) Indicated altitude stays the same, but your true altitude goes down.
D) Indicated altitude stays the same, but your true altitude goes up,
D) Indicated altitude stays the same, but your true altitude goes up,
*An aircraft is parked on the apron. You go home for the night. During the evening, cold air moves into the vicinity of the airport. When you return to your aircraft in the morning, what does your altimeter show?
A) It will over read and indicate a higher than normal altitude.
B) There will be no change in the altimeters reading.
C) It will under read and indicate a lower than normal altitude.
D) It will over read and indicate a lower than normal altitude.
*B) There will be no change in the altimeters reading.
