FAA Aircraft Dispatcher Practical Exam Questions.pdf file:///C:/Users/HP/Desktop/TYPA%20NEW/FAA%20Aircraft%20Di
FAA Aircraft Dispatcher Practical Exam Questions
1. How often are METARs issues?
ANS Every hour, or whenever the weather changesand necessitates a change. In that situation, a
SPECI (special METAR) is issued.
2. What is a SPECI?
ANS A special METAR which is created in between the hourlyMETARs 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.
3. Do METARs describe actual or forecast conditions?
ANS METARs depict actualfield conditions.
4. Define Radiation fog
ANS Shallow fog, ground fog. occurs on clear nights, little orno 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.
5. Define Advection fog
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ANS This fog forms when moist air moves over colder groundor water. Common along the
coast.
6. What is lake effect? Describe one major consequence of lake effect inwinter.
ANS 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 lakewater, snow, instead of showers will
occur.
7. What happens when the Temperature/dewpoint are very close?
ANS SmallTemp/DP spread is essential to the formation of fog.
8. How often are TAFs issued?
ANS Valid for a 24-hour period, TAFs are issued fourtimes 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.
9. Why is it important to know when the various charts and reports are issued?
ANS 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
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TAF will be the most up-to-date forecastand could contain critical information.
10. What is an Amended TAF?
ANS An amended TAF is issued when the current TAFno longer adequately describes the ongoing
weather or the forecaster feels the TAFis not representative of the current or expected weather.
11. Which sky conditions are considered a ceiling?
ANS Broken, Overcast, VV (ver-tical visibility[indefinite ceiling])
12. How often is a surface analysis chart issued?
ANS starting at 00Z at 3 hourintervals. (8 times a day)
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13. What are the primary features of a surface analysis chart?
ANS They show pres-sure patterns, fronts, and information on individual reporting stations.
The pressurepatterns are shown by isobars.
Isobars
Pressure Systems
Fronts
Troughs and Ridges
Station Models
14. How is a surface analysis chart used?
ANS It is used to determine sky cover, thetypes of clouds. SLP, pressure change, precip,
temp/dew point, present wx, wind. They can be used to locate the jetstream, turbulence, and
wind shear.
15. What is the relationship between isobars and surface winds?
ANS The closerthe isobars are together, the stronger the winds will be.
16. How often is a Weather depiction chart issued?
ANS Every 3 hours starting at01Z
17. What is a weather depiction chart?
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