Quiz #6

Miscellaneous Weather charts

There are at least 2 ways to practice this quiz. One way is to check your answer by clicking the "Check answer" button. This will give you immediate feedback regarding specific questions. The other option is to simply answer all the questions as a test and "Flip the switch" or "Press the button" (grade the test) after the last question to receive a test score. You can then check each question individually to see which questions were missed. If you have any problems or suspect an error, feel free to contact me anytime.

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

1. Isobars on a surface weather chart represent lines of equal pressure

at the surface.
reduced to sea level.
at a given atmospheric pressure altitude.

2. What is the single source reference that contains information regarding volcanic eruption, turbulence, and icing conditions for a specific region?

Weather Depiction Chart.
In-Flight Weather Advisories.
Area Forecast.

3. What sources reflect the most accurate information on current and forecast icing conditions?

Low-Level Sig Weather Prog Chart, RADAT's, and the Area Forecast.
PIREP's, Area Forecast, and the Freezing Level Chart.
PIREP's, AIRMET's, and SIGMET's.

4. Forecast winds and temperatures aloft for an international flight may be obtained by consulting

Area Forecasts published by the departure location host country.
the current International Weather Depiction Chart appropriate to the route.
Wind and Temperature Aloft Charts prepared by the U.S. National Centers for Environmental Prediction (NCEP).

5. How will an area of thunderstorm activity, that may grow to severe intensity, be indicated on the Severe Weather Outlook Chart?

SLGT within cross-hatched areas.
APCHG within any area.
SVR within any area.

6. For international flights, a U.S. High-Level Significant Weather Prognostic Chart is prepared for use

at any altitude above 29,000.
between 25,000 feet and 60,000 feet pressure altitude.
between FL 180 and FL 600.

7. Vertical wind shear can be determined by comparing winds on vertically adjacent constant pressure charts. The vertical wind shear that is critical for probable turbulence is

4 knots or greater per 1,000 feet.
6 knots or more per 1,000 feet.
greater than 8 knots per 1,000 feet.

8. A prognostic chart depicts the conditions

existing at the surface during the past 6 hours.
which presently exist from the 1,000-millibar through the 700-millibar level.
forecast to exist at a specific time in the future.

9. What information is provided by a Convective Outlook (AC)?

It describes areas of probable severe icing and severe or extreme turbulence during the next 24 hours.
It provides prospects of both general and severe thunderstorm activity during the following 24 hours.
It indicates areas of probable convective turbulence and the extent of instability in the upper atmosphere (above 500 mb).

10. The horizontal wind shear, critical for turbulence (moderate or greater) per 150 miles is

18 knots or less.
greater than 18 knots.
not a factor, only vertical shear is a factor.

11. The tropopause data chart is a two-panel chart containing a maximum wind prog and a vertical wind shear prog. The progs are issued once daily with a valid time of 1800 UTC and may be used from

1800 to 0600 UTC.
1800 UTC plus 24 hours.
1800 UTC +/- 6 hours.

Flip the switch to receive your score
 Toggle button