pt 1 Flashcards
The atmosphere is heated by:
a. long wave radiation from the ground
b. short wave radiation from the ground
c. long wave insolation from the sun
d. short wave insolation from the sun
a. long wave radiation from the ground
The approach altitude is 6,000ft and the approach chart stipulates that the altitude must be temperature corrected below 0°C. The surface temperature is -5°C.
To ensure that the aircraft is 6,000ft above mean sea level (true altitude), what indication should be read on the altimeter (with the QNH correctly set)?
a. 6480 ft
b. 6240 ft
c. 6000 ft
d. 5520 ft
a. 6480 ft
(1)
15 - (2 x 6 ) = 3 (isa temp @ 6000ft)
-5 - ( 2 x 6 ) = -17 (actual temp)
(2)
3 - ( -17) = 20 (temp deviation)
(3)
4 x (6000ft/1000) x 20 = 480 (altitude correction)
(4)
6000 + 480 = 6480
The area shown in the image below is a:
a. ridge of high pressure
b. trough of low pressure
c. ridge of low pressure
d. trough of high pressure
a. ridge of high pressure
When considering the effect that a layer of low stratus cloud would have on the diurnal temperature, the minimum temperature would be [ ] and the maximum temperature would be [ ] than on a clear day.
[higher]
[lower]
An aircraft is flying at FL100 where the outside air temperature is +10°C. The air density will be:
a. there’s not enough information to tell
b. the same as ISA
c. greater than ISA
d. less than ISA
d. less than ISA
An aircraft is in the decent to land at an airport reporting QNH 993. When the pilot reaches the transition level at FL060 and re-sets the altimeter to the QNH. What altitude reading will be displayed on the altimeter?
a. 6600 ft
b. 5400 ft
c. 5700 ft
d. 6000 ft
b. 5400 ft
1013-993= 20
20 x 30 = 600
6,000 - 600 = 5400
The meteorological phenomenon known as a temperature inversion occurs when
[ ] air exists below [ ] air. This is typical at [ ] when a [ ] pressure systems occurs.
[cooler]
[warmer]
[sunrise]
[high]
The definition of evaporation is the change of state for:
a. liquid to gas
b. liquid to solid
c. solid to gas
d. gas to liquid
a. liquid to gas
What is true of relative humidity?
a. it is likely to be highest at midday
b. it is proportional to air temperature
c. it is likely to be highest in the early morning
d. it remains constant throughout the day
c. it is likely to be highest in the early morning
/
What are the predominant pressure systems in the North Atlantic region between 30°N and 65°N and the adjacent land areas during mid-summer?
a. Low over N America and Scandinavian High
b. Azores low and Icelandic High
c. Azores High and low over N America
D. Scandinavian High and Azores High
c. Azores High and low over N America
Which process is typically associated with an area of low pressure?
a. Divergence
b. Adiabatic warming
c. Convergence
d. Katabatic winds
c. Convergence
A depression with warmer air at its core is described as a [ ] and will produce an upper [ ].
[warm low]
[high]
In the southern hemisphere, the Coriolis effect appears to deflect an air flow to its [ ] resulting in a ( ) direction of circulation around a high pressure system.
pick:
[right] or [left]
(clockwise) or (anti-clockwise)
[left]
(anti-clockwise)
The weather typically associated with a high pressure system is
a. cloud and precipitation with the possibility of thunderstorms
b. clear skies and calm wind with the possibility of fog in winter
c. high thin cloud and string surface wind
d. cloud, light wind and poor surface visibility
b. clear skies and calm wind with the possibility of fog in winter
