Met Gen 5 Flashcards
From the conditions listed below, choose those that are favorable for the formation of radiation fog:
1) High relative humidity.
2) An overcast sky at approx the 6,000 to 8,000 ft ASL level.
3) The presence of industrial smoke.
4) An air temperature that is much higher than the dewpoint temperature.
5) Light winds (2-5 KTs).
6) The presence of an anticyclone.
7) A very small spread between the frost point and dew point.
A) 1, 2, 4, 6.
B) 2, 3, 5, 7.
C) 1, 3, 4, 7.
D) 1, 3, 5, 6.
D) 1, 3, 5, 6.
Radiation fog does not form over the ocean surface since:
A) Favorable low-level, anticyclonic conditions do not prevail over the oceans.
B) The continuous presence of strong winds over the ocean surfaces prevents radiation cooling.
C) A dry layer aloft that arises from subsidence and which enhances radiation cooling at the surface never exists over and ocean.
D) This surface does not cool by radiation at night.
D) This surface does not cool by radiation at night.
The development of radiation fog can be aided by:
A) A mid-level overcast layer of cloud.
B) The presence of pronounced low-level subsidence.
C) The absence of any wind at the surface.
D) The presence of industrial smoke.
D) The presence of industrial smoke.
When comparing advection fog to radiation fog, you would know that:
A) Both advection and radiation fog depend on the presence of clear skies at night for their formation.
B) Advection fog requires a considerably higher relative humidity for its formation than does radiation fog.
C) Advection fog can form over both land and water, whereas radiation for only forms over the land.
D) Both advection and radiation fog require a very strong wind to assist in their formation.
C) Advection fog can form over both land and water, whereas radiation for only forms over the land.
Adiabatic cooling causes which of the following types of fog?
A) Advection fog.
B) Upslope fog.
C) Radiation Fog.
D) Ice fog.
B) Upslope fog.
When moist air moves from the east to west across the prairies you would expect which of the following to occur?
A) Widespread rain showers and low level turbulence.
B) Extensive build-ups of stratocumulus cloud with good visibility underneath and moderate turbulence.
C) Unstable conditions with considerable convective cloud development.
D) Widespread upslope for increasing towards the foothills of the Rocky Mountains.
D) Widespread upslope for increasing towards the foothills of the Rocky Mountains.
The physical process involved in the formation of Ice fog is:
A) Expansional cooling.
B) Sublimation.
C) Advectional cooling.
D) Condensation
B) Sublimation.
During the spring, what is the name of the air mass and the associated front that can lead to advection fog occurring in the vicinity of South Western Ontario?
A) Maritime Tropical/Polar front.
B) Maritime Arctic/Maritime front.
C) Continental Arctic/Arctic front.
D) Continental Polar/ Continental front.
A) Maritime Tropical/Polar front.
When temperatures are very low, a jet aircraft that takes off from a northern airport can trigger the formation of which of the following types of fog?
A) Upslope fog.
B) Prefrontal fog.
C) Advection fog.
D) Ice fog.
D) Ice fog.
With respect to airframe icing, choose from the factors listed below that determine the rate of catch:
1) Supercooled water droplet size.
2) The number of freezing layers present.
3) The temperature of the individual supercooled droplets.
4) The number of supercooled water droplets present.
5) Aircraft speed.
6) The length of time that the aircraft has been flying in cloud.
7) Shape of the aircraft wing.
A) 2, 3, 4, 7.
B) 1, 4, 5, 7.
C) 2, 3, 5, 6.
D) 1, 2, 4, 6.
B) 1, 4, 5, 7.
Large supercooled water droplets are most likely to be found in the:
A) Upper levels of the cloud that has formed in stable air where temperatures are well below freezing.
B) Lower levels of the cloud that has formed in the stable air where temperatures are well below freezing.
C) Upper levels of cloud that has formed in unstable air where temperatures are well below freezing.
D) Lower levels of cloud that has formed in unstable air where temperatures are only a few degrees below freezing.
D) Lower levels of cloud that has formed in unstable air where temperatures are only a few degrees below freezing.
If you inadvertently flew through a TCU or CB, you would expect moderate to severe icing down to what temperature?
A) -10 degrees C with light icing down to temperatures of approx -25 degrees C.
B) -25 degrees C with no further icing at colder temperatures.
C) -25 degrees C with light icing down to temperatures of approx -40 degrees C.
D) -40 degrees C with no further icing at colder temperatures.
C) -25 degrees C with light icing down to temperatures of approx -40 degrees C.
You would expect that rime ice accumulation rather than mixed or clear ice accumulation would occur when the rate of catch is:
A) Low and the droplets are small.
B) High and the droplets are large.
C) Low and the droplets are large.
D) High and the droplets are small.
A) Low and the droplets are small.
During and IFR cross country flight, your aircraft has been encountering light to moderate mixed icing. You notice that an increasing number of ice crystals are beginning to form within the cloud and would, therefore, expect that the further accumulation type and intensity would change to:
A) Clear icing and increasing intensity.
B) Rime icing and decreasing intensity.
C) Clear icing and decreasing intensity.
D) Rime icing and decreasing intensity.
B) Rime icing and decreasing intensity.
The shape of the wing is an important factor in determining its collection efficiency. When comparing a thin wing to a thick wing travelling at the same airspeed, it can be demonstrated that the leading edge of a thin wing will collect:
A) The same amount of ice per square inch when flying through cloud whose liquid water content is high.
B) Less ice per square inch.
C) The same amount of ice per square inch when skin temperatures are not not far below freezing and the droplets are large.
D) More ice per square inch.
D) More ice per square inch.
