Meteorology practice test

Pass mark 75% from twenty randomly chosen questions.

Results

#1. Fog that forms from the interaction of two airmasses is called:

Foehn wind

Radiation fog

Frontal fog

Hoar frost

#2. For saturated air, the lapse rate is _______________ ; this is called the Saturated Adiabatic Lapse Rate (SALR)

3° F per 1000 feet

1.5° C per 1000 feet

3° C per 1000 feet

3° C per 1000 metres

1.5° C per 1000 metres

#3. A cold front moves ________ a warm front.

perpendicular to

faster than

at the same speed as

slower than

#4. For smog to form:

An inversion is normally required

Freezing temeperatures are required

A low pressure system is required

High temperatures are required

#5. If flying on a hazy afternoon in Britain, in which direction will visibility be greatest?

Looking north

Looking west

Looking east

Looking into the sun

#6. The lapse rate for a dry parcel of air is:

1.5°C / 1000 feet

3°C / 1000 feet

1.98°C / 1000 feet

13.25°C / 1000 feet

#7. At the passage of a warm front you would expect:

Formation of towering cumulonimbus clouds

Low stratus and poor visibility

Smooth clear conditions

Severe turbulence

#8. Carburettor ice is formed

Only when the temperature is felt to be cold enough to warrant wearing a sweater or jacket, regardless of humidity levels

By the adiabatic temperature loss of air flowing through the venturi and the evaporation temperature loss coupled with high humidity

By the adiabatic temperature loss of air flowing through the venturi

Only when the OAT (outside air temperature), combined with wind-chill factor, is zero degrees C or below

#9. The atmosphere:

Is deeper at the poles than the equator

always increases in density at higher altitudes

Is less deep at the poles than the equator

Is of even depth

#10. In the ISA, what is the atmospheric pressure at sea level?

1000.00 hPa

1031.25 hPa

1011.33 hPa

1013.25 hPa

#11. In the northern hemisphere, compared to the surface, the 2000 foot wind can be expected to:

back and increase in strength

veer and increase in strength

back and decrease in strength

veer and decrease in strength

#12. Following the passage of a typical cold front, an observer at the surface would expect to experience which of the following conditions:

Pressure falling rapidly; Cloud OVC Ns/St; visibility very poor

Pressure steady rises; Cloud SCT/BKN Cu; visibility generally good

Pressure does not change; Cloud OVC; visibility very poor

Pressure falls then rises; Cloud BKN Cu/SCu; visibility poor with fog

#13. Mean sea level density in the International Standard Atmosphere (ISA) is:

14.7 grammes per square inch

1.98 degrees Celsius per 1000 feet

29.92 inches of mercury

1225 grammes per cubic metre

#14. You’re at an airfield just a few feet above sea level, and it’s a standard day (ISA). Approximately what altitude would you find a temperature of -1 degrees Celsius?

7000' AMSL

9000' AMSL

8000' AMSL

6000' AMSL

The standard lapse rate is 2 degrees for every thousand feet. ISA standard temperature is 15 degrees at sea level.

The difference between 15 and -1 is 16 degrees. Dividing this value by 2 (two degrees per thousand feet) gives you 8. Multiply that by 1,000 and you get an altitude of 8,000 feet.

#15. The Geostrophic Wind flows:

Diagonal to the isobars

Parallel to the isobars

Towards a high pressure area

Perpendicular to the isobars

#16. Virga means:

Light rain that evaporates before reaching the ground

Hail that melts and turns into rain before reaching the ground

Short burts of rain

Newly formed wisps of cloud

#17. The atmospheric situation where temperature increases with height is called a(n):

Illusion

Occlusion

Inversion

Diversion

#18. The decode for hail in a METAR is:

#19. Orographically formed clouds occur:

Over mountain ranges, large hills or sloping plains

Over the sea during the summer

Only at night-time

Whenever the eddying motion associated with mechanical turbulence sets off large scale vertical movements

#20. Considering the following METAR for Catania-Fontanarossa airport: LICC 231020Z 23007KT 200V280 9999 FEW060 13/04 Q1028=. Which of the following statements is not incorrect?

The report shows that cloud coverage is 1 to 2 oktas, at 6000 feet.

The report shows that both runways 20 and 28 are in excess of 9999 feet in length.

The report shows that the wind direction is 060 degrees at 4kt with 13kt gusts.

The report was issued at 23:10:20s (GMT), showing a southwest wind of 7kt.

Location: LICC
Day of month: 23
Time: 10:20 UTC
Wind: True direction = 230 degrees, Speed: 7 knots
Wind direction is variable between 200 and 280
Visibility: 10 km or more
Clouds: Few (1-2 oktas), at 6000 feet above aerodrome level
Temperature: 13 degrees Celsius
Dewpoint: 04 degrees Celsius
QNH (Sea-level pressure): 1028 hPa

finish