Meteorology - practice test

Pass mark 75% from twenty randomly chosen questions.

Results

#1. What is the first sign of an approaching warm front?

cumulonimbus clouds

high cirrus cloud

continuous rain

low stratus cloud

#2. Density will be low when the:

Pressure is high and temperature is high.

Pressure is low and temperature is high.

Pressure is low and temperature is low.

Density varies directly with pressure, ie as pressure increases so does density.
Temperature varies inversely with density, ie as temperature decreases, density increases.

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#4. If the wind gradient is described as strong, which statement regarding the surface wind is true?

It will be lighter than the upper wind.

It will flow in the opposite direction to the upper wind.

It will be stronger than the upper wind.

It will flow at 90° to the upper wind.

#5. With reference to the F215 Low-level Weather Forecast image, what is the expected freezing level in the far western part of section C?

7,000ft - 9,000ft

8,000ft

above 10,000ft

1,500ft - 3,000ft

Form 215 example with explanation:

#6. In the northern hemisphere, which direction do the winds flow?

to the east

clockwise around a high pressure

anti-clockwise around a high pressure

away from the low pressure

#7. What weather development will result from convergence at ground level?

Ascending air and cloud dissipation

Ascending air and cloud formation

Descending air and cloud formation

Descending air and cloud dissipation

#8. You take-off in a westerly direction from an inland aerodrome then fly to the east to a coastal aerodrome on an afternoon in the Summer. During the flight you have a light tailwind. In which direction can you expect the surface wind to blow at the coastal aerodrome?

In the same direction as take-off (i.e blowing from the west)

out of 180°

out of the North

Reversed (i.e blowing from the sea)

#9. With which type of cloud is thermal activity associated?

nimbostratus

stratus

cirrus

cumuliform

#10. One hectopascal (hPa) represents a change in altitude of:

100 feet

1013.25 feet

30 feet

10 feet

#11. How would 4/8 oktas cloud coverage be described on a METAR ?

FEW

BKN

SCT

#12. Carburettor ice is formed

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

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

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

By the adiabatic temperature loss of air flowing through the venturi

#13. What are the common characteristics of a cold air mass moving over a warm surface?

cumuliform clouds, clear visibility and turbulence

clear skies, poor visibility

stratiform clouds, poor visibility and persistent precipitation

#14. In the southern hemisphere, high pressure system winds circulate in which direction?

Either of these directions

Anticlockwise

Clockwise

At right angles to the isobars, towards a higher pressure region

#15. During the passage of a cold front, the wind will

not change direction

veer approximately 30 degrees

back approximately 30 degrees

#16. What is most likely to happen to a Polar Maritime air mass that travels south over the UK?

It will suppress cloud formation

It will become more stable

It will cool down

It will become less stable

#17. When a wind changes direction from Southerly to South-Westerly, it is said to have:

Veered in the northern hemisphere and backed in the southern hemisphere

Backed in the southern hemisphere and veered in the northern hemisphere

Veered in either hemisphere

Backed in the northern hemisphere and veered in the southern hemisphere

#18. Which conditions are typically prevalent on the North Eastern coastline of the UK in the winter when the weather is influenced by a Polar Continental airflow?

Snow showers.

Strong winds.

Radiation fog.

Warm onshore breezes.

#19. What is indicated by the appearance of Alto-cumulus castellanus clouds?

persistent rain and low visibility may come in the next few days

calm conditions

an approaching warm front

thunderstorms could form soon

#20. Considering the TAF, which of the following statements is accurate? EGPH 111101Z 1112/1212 21006KT 9999 FEW012 SCT020 TEMPO 1112/1212 7000 -RA BKN012 PROB40 TEMPO 1202/1208 3000 RADZ BR BKN006 PROB40 TEMPO 1208/1212 4000 BR BKN008.

40% chance between 8am and 12pm zulu, cloud tops will be 4000ft with bright spells and cloud base will be broken at 800ft

40% chance between 8am and 12pm zulu, the cloud cover will be broken at 4,000ft and broken at 800ft

40% chance between 8am and 12pm zulu, the visibility will be 4km with mist and broken clouds at 800ft

Finish