1Characteristic of the stratosphere is......
relatively small changes in temperature with an increase in altitude.
2The troposphere begins at the Earth's surface and extends up to average about ______ high at mid latitude. It decreases from the Equator to the poles, and is higher during summer than in winter.
36,000FT
3Which feature is associated with the tropopause?H
Abrupt change in temperature lapse rate.
4The surface temperature is 50 degree F, what would be
Freezing level (0 degree C) altitude? Lapse rate is standard 2 degee C/1000 feet
5,000FT
5How much colder than standard temperature is the forecast temperature at 9,000 feet, as indicated in the following excerpt from the winds and temperature aloft forecast?
FT 6000 9000
0737-04 1043-10
7°C.
6If the air temperature is +4°C at an elevation of 1,000 feet and a standard (average) temperature lapse rate exists, what will be the approximate freezing level?
5,000Ft MSL
8Convert 20 degree C to F
68
9How to convert Celsius to Farenheit and vice versa
Celsius to Farenheit:
C = (F-32) x 0.555
Farenheit to Celsius:
F = (0.555 x C) - 32
10A temperature inversion would most likely result in which of the following weather conditions ?
An increase in temperature as altitude is increased
11The most frequent type of ground or surface based temperature inversion is that which is produced by
the movement of colder air under warm air, or the movement of warm air over cold air
12What is closedly related with a temperature inversion?
A stable layer of air.
13Relative humidity indicate the actual water contents instead of how close the air is to saturation, so relative humidity is always constant regardless of temperature
false
14The higher the air parcel's temperature is, the greater the air parcel's capacity of holding water will be.
true
15The amount of water vapor which air can hold largely depends on
air temperature.
16The difference between an air parcel’s temperature and its dewpoint is the dewpoint depression, or commonly referred to as the spread.
relative humidity is 100 percent
17What is 'dew point' ?
The temperature to which air must be cooled to become saturated.
18The temperature spread:
decreases as the relative humidity increases.
19This is actual FAA private pilot written test question, you will see this type of question in Midterm and Final and quizzes in future as well. This is to check if you studied the textbook material before you come to the class.
evaporation and sublimation.
20Every physical process of weather is accompanied by, or is the result of, a
Heat exchange.
21Why altimeter settings varies between weather reporting station?
Unequal heating of the Earth's surface.
22 FAA Clouds, fog, or dew will always form when
water vapor condenses
23There are six phase transitions, three of which are associated with the absorption of latent heat by water from the environment.
Select the phase transition that is not associated with the absorption of latent heat
freezing
24In the cold air column, the pilot would fly at an altitude lower than the indicated altitude.
False
25True Statements About Density
- Assuming equal mass, an air parcel with a higher density has a smaller volume than an air parcel with a lower density
- Assuming constant mass and temperature, an air parcel with a higher pressure is denser than an air parcel with a lower pressure.
- Assuming constant mass and pressure, an air parcel with a higher temperature is less dense than an air parcel with a lower temperature
26When pressure, temperature, and volume are constant, select the correct statement?
air with greater amount of water vapor is less dense (weigh less) than air with lesser amount of water vapor
27In the cold air column, the pilot would fly at an altitude lower than the indicated altitude.
true
284-2 On Density altitude - dewpoint (water vapor) is also contributing factor, but its effects are generally negligible.
true
29The performance table of an aircraft for takeoff and climb are based on
pressure/density altitude
30Density altitude is the vertical distance above mean sea level in the standard atmosphere at which
pressure altitude is corrected for standard temperature.
31BL. Wind is caused by
Pressure differences
324-2 BL On surface analysis charts; if the isobars are closer together
the pressure gradient force is greater and wind velocities are stronger.
33BL 3 What prevents air from travel via straight line directly from high-pressure to low-pressure?
Coriolis force.
34L4 FAA sample. The wind at 5,000 feet AGL is southwesterly while the surface wind is southerly. The difference in direction is primarily due to
friction between the wind and the surface
35LV sample What causes surface winds to flow across the isobars at an angle rather than parallel to the isobars?
Surface friction.
364-6 BL What is the difference between the winds at 5,000 feet above the surface and the surface winds?
The winds at 5,000 feet is parallel the isobars while the surface winds cross the isobars at an angle toward lower pressure and are weaker.
37Which force, in the Northern Hemisphere, acts at a right angle to the wind and deflects it to the right until parallel to the isobars?
Coriolis.
384-8 BL In the low pressure in the Northern Hemisphere, winds are
cyclone because of Coriolis force.
39BL 4-9 In a long straight flight, in the Northern Hemisphere, a pilot observed continuous left crosswind, as the flight progresses the weather will most probably;
change to become generally worse weather conditions.
40BL 4-10 The general directions of air associated in a high-pressure area in the Northern Hemisphere are
downward, outward and clockwise.
41427. Pvt LV A pilot planning a long distance flight from west to east in the conterminous United States would most likely find favorable winds associated with high and low pressure systems by planning to fly a course which is
north of a high.
42BL In the winter months in the middle latitudes, the jet stream move toward the
Lower altitude, south and speed increases.
43BL 4-13 The occurrence of CAT can extend to very high levels and can be associated with other windflow patterns which is
in an upper trough on the polar side of a jet stream.
444-14 Quoted from ASA 5383 FAA?? The jet stream and associated clear air turbulence can sometimes be visually identified in flight by
long streaks of cirrus clouds.
45BL 4-15 Jet streams stronger than ____kts (at the core) have potential for generating significant turbulence
110