Flight Dispatcher Skills Test – ORALS | 150
Questions with 100% Correct Answers |
Updated 2024 | Guaranteed A+
What is the major source of all changes in the Earth's weather? ✔✔Uneven heating of
the Earth's surface
What is a standard day relative to pressure and temperature? ✔✔29.92 millibars of
pressure and a temperature of 15 degrees celcius at sea level.
What are some examples of the causes of temperature variations across the planet
✔✔Diurnal variation
Seasonal variation
Latitude (angle of sun exposure)
Topographical issues
Altitude effects
The tropopause is characterized by? ✔✔an abrupt change of temperature lapse rate
What effect does temperature have on aircraft performance? ✔✔As temperature
increases, aircraft performance is reduced due to a decrease in air density.
,What potential issues might arise when an inversion exists at an airport? ✔✔Inversions are
often associated with reduced visibility and possible wind shear as an aircraft passes
through the inversion layer.
What effect does temperature have on aircraft performance? ✔✔As temperature
increases, aircraft performance is reduced due to a decrease in air density
Describe a low-pressure system? ✔✔Lows are areas of reduced pressure and have
counterclockwise wind that flows inwards and upwards in the northern hemisphere
(opposite in the southern hemisphere). These are commonly associated with poor weather.
What is a "trough"? ✔✔A trough is an elongated area of low pressure. Weather systems
often develops in association with troughs.
What is a "ridge" ✔✔A ridge is an elongated area of high pressure.
What is "col"? ✔✔A col is a neutral area between high and low-pressure systems, or it is
where a ridge and trough meet.
Describe a high-pressure system ✔✔Highs are areas of increased pressure and have clockwise
wind that flows outward and downward in the northern hemisphere (opposite in the
southern hemisphere). These are commonly associated with good weather.
,How does pressure vary with altitude? ✔✔Pressure decreases as altitude increases. In the
standard atmosphere the rate of decrease is 1 inch Hg per 1,000 feet.
What is "true altitude"? ✔✔True altitude is an aircraft's height above sea level. Its also
known as mean sea level (MSL).
What is "pressure altitude? ✔✔This is altitude in reference to the standard datum plane
of 29.92'' Hg
Why does a high density altitude reduce aircraft performance? ✔✔a) Reduce engine
thrust/power
b) Reduce the amount of lift that is produced
by the wing
What is "Coriolis force"? ✔✔The Coriolis force is a phenomenon that occurs due to the
rotation of the Earth that causes wind in the Northern Hemisphere to be deflected to the right.
Why is wind speed usually slower near the surface as compared to aloft? ✔✔This occurs due
to friction between the terrain at the surface and the wind. Winds aloft move relatively
unrestricted.
How does wind flow in relation to isobars aloft? ✔✔Winds aloft tend to flow parallel to
isobars due to Coriolis force turning the wind to the right (in the Northern Hemisphere)
, What is Fog? ✔✔Fog is a surface - based cloud that always forms in stable air conditions
What are the three main types of Fog and how are they formed? ✔✔1. Radiation Fog:
occurs when there is a surface - based temperature inversion. (mostly during
relatively calm nights and just after sunrise)
2. Advection Fog: forms when warm moist air
flows over a colder surface (commonly occurs
over bodies of water such as lakes or oceans)
3. Upslope Fog: forms when moist, stable air is gradually moved over higher ground by the
wind (commonly in mountainous areas)
Name five causes of turbulence? ✔✔i. Convective currents (heating of
ground Surface)
ii. Mountain waves
iii. Wind shear
iv. Clouds
v. Inversions
vi. wake turbulence (from the aircraft)
vii. Mechanical (objects on the ground such as
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