Study Questions Flashcards
If a pilot fails to adjust his alternator and flies from a high-pressure area to a low pressure area than the aircraft is ______than that aircraft altimeter indicates?
Lower
What is the primary means of obtaining an altimeter setting at a terminal facility?
Using a “precision aneroid barometer” to obtain “station pressure”
If the pilot flies from a low pressure area to a high-pressure area the aircraft is____then the aircraft altimeter indicates
Higher
Should the pilot fly from warm to cold air without adjusting the altimeter setting the aircraft will be____then the altimeter indicates
Lower
What is indicated when the pilots at the aircraft altimeter at 29.92 inches?
Pressure altitude
High density altitude affects and aircraft by …..?
Reducing aircraft performance
When cool air sinks to the ground what happened to the warm air at the ground?
The warm air expands and becomes lighter than the cooler air causing “wind”
Horizontal movement of wind is called what?
Advection
Explain the Coriolis effect
As the Earth turns it deflects the paths of air to the right in the northern hemisphere and to the left in the southern hemisphere
Air flows from a____pressure system to a___pressure system
High to low
What are three characteristics of a low-pressure system?
(1) less clouds enter (2) better daytime visibility (3) light/calm wind
What are three characteristics of a high-pressure system?
1) less clouds 2) better daytime visibility 3) light/Calm wind
How are clouds classified?
By their method of formation composition and altitude which they are found
Which cloud type is associated with fog?
Stratus
Which club type is associated with high altitudes
Cirrus
Which cloud type is associated with a “rain cloud”
Nimbo/Nimbus
Which club type is associated as broken?
Fractus
List the three stages of A thunderstorm
1) Cumulus stage 2) mature stage 3) dissipating stage
State the 10 weather hazards a pilot may encounter with a thunderstorm
Tornadoes, squall lines, turbulence, icing, hail, low ceiling/visibility, effects on alternators, lightning, wind shear, precipitation
What are the causes of a cold front?
When cold air replaces warm air and when cold air wedges under warm air pushing it up
What are the characteristics of a cold front?
Temperature/humidity decreases and pressure decreases with approach and Wind shifts clockwise usually from Southwest to Northwest in the northern hemisphere
List the causes of a warm front
Advancing mass a relatively warm air is replacing retracting relatively colder air mass
List the characteristics of a warm front
Wind it ships clockwise from south east to Southwest and precipitation in the form of continuous or intermittent rain or drizzle as much as 300 miles in advance of surface front
What are the. Characteristics of a stationary front?
Shows little to no apparent movement
What are the five types of fog?
Radiation, addiction, upslope, steam, frontal
What are the conditions favorable for ground fog formation?
Clear cool night, light wind (5 kn or less ), small spread between temperature and dewpoint
Air traffic controller’s encounter what kind of fog more often than any other variety in the vicinity of the airport?
Radiation
What is the most dangerous type of fog and why?
Advection because it forms rapidly and cover large areas
Cold air moving over Warmwater produces what kind of fog?
Steam fog
What type of ice forms on the fuselage of an aircraft?
Structural
What is the most serious form of icing?
Clear
What type of ice has a milky opaque granular deposit with the rough surface?
Rime
What causes convective turbulence?
Uneven heating of earths surface
What causes mechanical turbulence
Obstructions in the path of the wind
What causes wake turbulence
Caused by generation of rotary motor off vertices of the wingtips of aircraft
What causes windshear
Caused by changes in the wind speed and/or direction in short distance
What is the function of what is the function of AWOS?
Broadcast local minute by minute weather data directly to pilots
ASOS was designed to?
Designed to support aviation operations and weather forecast activities
Terminal aerodrome forecast are issued how often and are valid for how many hours?
Issued four times daily and are valid for 24 to 30 hours
