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FAA Aircraft Dispatcher Practical Exam Questions with Answers
FAA Aircraft Dispatcher Practical Exam Questions with Answers
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FAA Aircraft Dispatcher Practical ExamQuestions with Answers
How often are METARs issues? - -Every hour, or whenever the weather
changes and necessitates a change. In that situation, a SPECI (special
METAR) is issued.
-What is a SPECI? - -A special METAR which is created in between the hourly
METARs due to a change in weather necessitating the change.
-Change of winds necessitating a new runway.
-WX changing from IFR to VFR or VFR to IFR.
-Do METARs describe actual or forecast conditions? - -METARs depict actual
field conditions.
-Define Radiation fog - -Shallow fog, ground fog. occurs on clear nights,
little or no wind, and small temp/DP spread (high relative humidity). Occurs
at night or daybreak. Radiation cools the ground. The ground cools the air.
When the air is cooled to the dew-point, fog forms.
-Define Advection fog - -This fog forms when moist air moves over colder
ground or water. Common along the coast.
-What is lake effect? Describe one major consequence of lake effect in
winter. - -Air moving across a sizeable lake absorbs water vapor.
Showers may appear on the leeward side if the air is colder than the water. If
the air is warmer than the water, fog often develops on the leeward side. In
the winter, lake effect snow is a concern because as a cold front passes over
the warmer lake water, snow, instead of showers will occur.
-What happens when the Temperature/dewpoint are very close? - -Small
Temp/DP spread is essential to the formation of fog.
-How often are TAFs issued? - -Valid for a 24-hour period, TAFs are issued
four times daily at 00Z, 06Z, 12Z, and 18Z, and updated as conditions
warrant. TAFs include information about wind speed and direction, visibility,
present weather, ceilings, and low-level wind shear.
-Why is it important to know when the various charts and reports are
issued? - -Because you always need to use the most up to date information
and knowing when the next forecast is coming up is essential for making
critcal flight decisions. For instance, if it is 05:55Z, the TAF from 00Z is the
most up-to-date forecast, however, in only 5 minutes, the 06Z TAF will be the
most up-to-date forecast and could contain critical information.
, -What is an Amended TAF? - -An amended TAF is issued when the current
TAF no longer adequately describes the ongoing weather or the forecaster
feels the TAF is not representative of the current or expected weather.
-Which sky conditions are considered a ceiling? - -Broken, Overcast, VV
(vertical visibility[indefinite ceiling])
-How often is a surface analysis chart issued? - -starting at 00Z at 3 hour
intervals. (8 times a day)
-What are the primary features of a surface analysis chart? - -They show
pressure patterns, fronts, and information on individual reporting stations.
The pressure patterns are shown by isobars.
Isobars
Pressure Systems
Fronts
Troughs and Ridges
Station Models
-How is a surface analysis chart used? - -It is used to determine sky cover,
the types of clouds. SLP, pressure change, precip, temp/dew point, present
wx, wind. They can be used to locate the jetstream, turbulence, and wind
shear.
-What is the relationship between isobars and surface winds? - -The closer
the isobars are together, the stronger the winds will be.
-How often is a Weather depiction chart issued? - -Every 3 hours starting at
01Z
-What is a weather depiction chart? - -A weather chart to be used for flight
planning by giving an overall picture of the WX across the US.
, -What is a Radar summary chart? - -A radar summary chart is a graphically
depicted collection of radar weather reports.
-Does the Radar summary chart depict forecast conditions, or observed
conditions? How often? - -Observed, hourly.
-What is the difference between visible and infrared Satellite imagery? - -
The visible images display cloud cover. The infrared images display the earth
in a manner that correlates with temperature. Generally speaking, the
warmer an object, the more infrared energy it emits.
-What does water vapor imagery show on the Satellite imagery? - -The
water vapor images display the earth in a manner that correlates to quantity
of water vapor in the upper portions of the atmosphere (25,000 feet and
higher in general). The most useful information to be gained from the water
vapor images is the locations of storm systems and the jet stream.
-What do the Valid Times indicate?
(on a prog chart) - -12 and 24 hours. They indicate that the prog chart is
valid for 12 hours from the time issued, or 24 hours from the time issued.
-How many times are Prog charts issued? - -4 times a day. 00Z, 06Z, 12Z,
18Z.
-Is a prog chart a forecast or a depiction of actual conditions? - -Forecast.
Remember "to prognosticate" means "to forecast"
-What kinds of weather/hazards are shown on the low level prog chart? - -
Precip, icing, turbulence, thunderstorms, tropical storms, hurricanes
IFR/MVFR conditions, areas of high/low pressure, different types of fronts.
-What is a cold front? - -The leading edge of an advancing cold air mass
-What clouds are associated with a cold front? - -Cumulus and
cumulonimbus
-What weather is associated with a cold front? - -Thunderstorms, hail,
tornadoes, good visibility.
-What discontinuities are associated with a cold front? - --Temp: Cold air
advances and overtakes warm air.
-Pressure: Pressure will drop then rises abruptly after the front passes.
- Windshift
-What is a warm front? - -The leading edge of an advancing warm air mass.
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