VFR - MET - Good Questions Flashcards
1 QNH = 1012 hPa, FE = 510 ft, calculate the QFE and the QNE.
QFE = 995 hPa
QNE = 540 ft
2 QFE = 997 hPa, FE = 720 ft, calculate the QNH and the pressure altitude.
QNH = 1021 hPa
PA = 480 ft
3 QNH = 1009 hPa, FE = 200 ft. Calculate the altitude and the height of FL075.
Height = 7180ft
Altitude = 7380ft
4 QNH = 1020 hPa, FE = 180 ft. Calculate the altitude and the height of FL060.
Altitude = 6210 ft
Height = 6030 ft
5 QNH is 1018 hPa. What does the altimeter indicate at FL060 after the setting has been changed to QNH?
6150 ft
6 Field elevation = 250 ft, QNH = 1001 hPa; the pilot (on the runway) has set 1007 hPa to the altimeter. What is the reading of the pressure altimeter?
430 ft
7 Field elevation = 900 ft, QNH = 1015 hPa; a helicopter has landed with the correct altimeter setting. During night the pressure rises by 4 hPa. What does the altimeter indicate the next morning?
780ft
8 List the general features of a low in the northern hemisphere.
Air pressure is lower than in its surrounding
Wind blows counter-clockwise around the center
Air ascends and is cooled according to “dry” and “moist” adiabatic lapse rates
Clouds form
Bad weather (precipitation)
- Which pressure systems exist at 60°N, at the equator, at the North Pole, and at 30°N?
Low pressure = At the equator and at 60°N
High pressure = At 30°N and at the north pole
15 Which cloud type can you expect
a. in an unstable maritime polar airflow?
b. in a stable maritime tropical airflow?
a) Cumuliform clouds
b) Stratiform clouds
20 Which particular conditions do you expect at a warm front with exceptional unstable conditions?
TCU and CB with showers and thunderstorms are embedded within stratiform clouds.
21 Where within a low is the warm sector situated and which air mass contacts the ground within the warm sector?
Between the warm front and cold front. The warm air mass contacts the ground.
Page 11
25 Which clouds, visibility, weather phenomena and aircraft icing do you expect at the passage of a cold front type I?
CU, TCU, CB
Poor visibility in precipitation, outside good
Showers, Hail, Thunderstorms
Clear ice
Page 12
28 Explain the formation of an occlusion.
Occurs when coldfront overtakes warmfront and the warm air mass is lifted of the ground.
43 Which type of ice can you expect
a. in CU at -5°C
b. in TCU at -15°C
c. in AS at -11°C
d. in FZRA
e. in NS at -25°C?
a) Clear
b) Rime
c) Rime
d) Clear
e) No ice or traces
44 Which type of ice can you expect
a. in CB at -8°C
b. in AC at -15°C
c. in CS at -30°C
d. in +FZDZ
e. in NS at -5°C?
a) Clear
b) Rime
c) No ice
d) Clear
e) Rime
45 Explain frost.
Ice crystals which form due to sublimation.
53 List 8 thunderstorm hazards.
Lightning
Hail
Gusty surface wind
Severe turbulence
Severe icing
Rapid reduction of visibility
Lowering ceiling
Altimeter errors
Radar/Radio disturbances
Aquaplaning on RWYs and taxiways
Downburst / microburst
75 Explain the formation of advection fog.
Forms when moist air moves over a colder surface and is cooled by contact until condensation occurs.
77 Explain the formation of upslope fog.
Forms when moist air moves up sloping terrain and is cooled adiabatically until condensation occurs.
80 Explain the formation of frontal fog and where is it most likely?
Result of moist added to air until condensation occurs. Ahead of approaching warm front.
85 Under which circumstances a Bw helicopter pilot has to submit a PIREP to the appropriate ATC unit?
- When weather conditions differs considerably.
- When unusual conditions are encountered.
- In case of a missed approach due to poor meteorological conditions.
88 Attached (picture is on the full VFR MET questionpool) you find a surface forecast chart for tomorrow 1200z. Any fronts will show usual character.
a: Which wind direction and speed (light, moderate, strong), which cloud type and which precipitation type do you expect at point A tomorrow between 1200 and 1400z?
b: Which weather development do you expect at point B tomorrow during the day and during the following night?
A) Wind direction 220 (SW), strong winds, stratiform clouds, continuous precipitation
B) Fine day, clear night with risk of mist/fog forming during the night.
92 Explain the expression “void after” in the weather forecast process.
Time until when T/O must have taken place.
Otherwise forecast is invalid.
Valid max 3h after the issue time (time of oral briefing) unless extended.
Can be extended max 2h.
96 Explain the expression “ISOL” in the weather forecast process.
Affected portion
ISOL ≤ 10%
97 Explain the expression “LOC” in the weather forecast process.
Affected portion:
10% < LOC ≤ 25%
98 Explain the expression “FRQ” in the weather forecast process.
Affected portion:
25% < FRQ < 50%
