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Thank you and good luck.
Eric Morris
President
Sheffield School of Aeronautics

1. Which weather condition is an example of a nonfrontal instability band?

Squall line.
Advective fog.
Frontogenesis.

2. Which atmospheric factor causes rapid movement of surface fronts?

Upper winds blowing across the front.
Upper low located directly over the surface low.
The cold front overtaking and lifting the warm front.

3. In which meteorological conditions can frontal waves and low pressure areas form?

Warm fronts or occluded fronts.
Slow-moving cold fronts or stationary fronts.
Cold front occlusions.

4. What weather difference is found on each side of a "dry line"?

Extreme temperature difference.
Dewpoint difference.
Stratus versus cumulus clouds.

5. What condition is necessary for the formation of structural icing in flight?

Supercooled water drops.
Water vapor.
Visible water.

6. Which type precipitation is an indication that supercooled water is present?

Wet snow.
Freezing rain.
Ice pellets.

7. Which type of icing is associated with the smallest size of water droplet similar to that found in low-level stratus clouds?

Clear ice.
Frost ice.
Rime ice.

8. Which is a necessary condition for the occurrence of a low-level temperature inversion wind shear?

The temperature differential between the cold and warm layers must be at least 10 degrees C.
A calm or light wind near the surface and a relatively strong wind just above the inversion.
A wind direction difference of at least 30 degrees between the wind near the surface and the wind just above the inversion.

9. What is the lowest cloud in the stationary group associated with a mountain wave?

Rotor cloud.
Standing lenticular.
Low stratus.

10. Where is the normal location of the jetstream relative to surface lows and fronts?

The jetstream is located north of the surface systems.
The jetstream is located south of the low and warm front.
The jetstream is located over the low and crosses both the warm front and the cold front.

11. Which type frontal system is normally crossed by the jetstream?

Cold front and warm front.
Warm front.
Occluded front.

12. Which type clouds may be associated with the jetstream?

Cumulonimbus cloud line where the jetstream crosses the cold front.
Cirrus clouds on the equatorial side of the jetstream.
Cirrostratus cloud band on the polar side and under the jetstream.

13. Summer thunderstorms in the arctic region will generally move

northeast to southwest in polar easterlies.
southwest to northeast with the jetstream flow.
directly north to south with the low-level polar airflow.

14. Which arctic flying hazard is caused when a cloud layer of uniform thickness overlies a snow or ice covered surface?

Ice fog.
Whiteout.
Blowing snow.

15. A strong wind shear can be expected

on the low pressure side of a 100-knot jetstream core.
where the horizontal wind shear is 15 knots, in a distance equal to 2.5 degrees longitude.
if the 5 degree C isotherms are spaced 100 NM or closer together.

16. Where do the maximum winds associated with the jetstrearn usually occur?

in the vicinity of breaks in the tropopause on the polar side of the jet core.
Below the jet core where a long straight stretch of the jetstrearn is located.
On the equatorial side of the jetstrearn where moisture has formed cirriform clouds.

17. What weather feature occurs at altitude levels near the tropopause?

Maximum winds and narrow wind shear zones.
Abrupt temperature increase above the tropopause.
Thin layers of cirrus (ice crystal) clouds at the tropopause level.

18. Where are jetstreams normally located?

in areas of strong low pressure systems in the stratosphere.
At the tropopause where intensified temperature gradients are located.
in a single continuous band, encircling the Earth, where there is a break between the equatorial and polar tropopause.

19. Which weather condition is present when the tropical storm is upgraded to a hurricane?

Highest windspeed, 100 knots or more.
A clear area or hurricane eye has formed.
Sustained winds of 65 knots or more.

20. What is the general direction of movement of a hurricane located in the Caribbean or Gulf of Mexico region?

Northwesterly curving to northeasterly.
Westerly, until encountering land, then easterly.
Counterclockwise over open water, then dissipating outward over land.

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