FAA AIRCRAFT DISPATCHER PRACTICAL EXAM QUESTIONS AND
ANSWERS GRADED A+ 100% VERIFIED.
How often are METARs issues? ANS >> Every hour, or whenever the
weather changes and necessitates a change. In that situation, a SPECI
(special METAR) is issued.
What is a SPECI? ANS >> 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.
,FAA AIRCRAFT DISPATCHER PRACTICAL EXAM
Do METARs describe actual or forecast conditions? ANS >> METARs
depict actual field conditions.
Define Radiation fog ANS >> 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 ANS >> 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. 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 pass over the warmer lake water, snow, instead of showers
will occur.
What happens when the Temperature/dewpoint are very close? ANS
>> Small Temp/DP spread is essential to the formation of fog.
How often are Tafes issued? ANS >> Valid for a 24-hour period, Tafes
are issued four times daily at 00Z, 06Z, 12Z, and 18Z, and updated as
,FAA AIRCRAFT DISPATCHER PRACTICAL EXAM
conditions warrant. Tafes 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? 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 critical 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? ANS >> 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? ANS >> Broken,
Overcast, VV (vertical visibility [indefinite ceiling])
How often is a surface analysis chart issued? ANS >> starting at 00Z at
3-hour intervals. (8 times a day)
What are the primary features of a surface analysis chart? ANS >>
They show pressure patterns, fronts, and information on individual
reporting stations. The pressure patterns are shown by isobars.
Isobars
, FAA AIRCRAFT DISPATCHER PRACTICAL EXAM
Pressure Systems
Fronts
Troughs and Ridges
Station Models
How is a surface analysis chart used? ANS >> It is used to determine
sky cover, the types of clouds. SLP, pressure change, precap, temp/dew
point, present wax, wind. They can be used to locate the Jetstream,
turbulence, and wind shear.
What is the relationship between isobars and surface winds? ANS >>
The closer the isobars are together, the stronger the winds will be.
How often is a Weather depiction chart issued? ANS >> Every 3 hours
starting at 01Z
What is a weather depiction chart? ANS >> A weather chart to be used
for flight planning by giving an overall picture of the WX across the US.