General knowledge Flashcards
What is the temperature of ISA (International Standard Atmosphere)
+15°C surface temperature
How does the temperature change as you gain altitude according to ISA
The temperature decreases by 2°C per 1000ft
What is the freezing level of ISA
7500ft
What is the pressure of ISA
Standard pressure is 1013hPa
How much does pressure decrease as you gain altitude
1 hPa per 30ft (approximately)
Name the layer s of atmosphere from the ground up
Troposphere, Stratosphere and Ionosphere
What is the upper layer of the Troposphere called
Tropopause
What height does the Tropopause occur
36000ft and up to more than 50000ft in the tropics
What distance should you avoid thunderstorms
10nm
Large cumulonimbus clouds usually originate
With thunderstorms
A forecast of 32015 kt means
Wind strength of 15 knots from a direction of 320°T
A sea breeze occurs
In the afternoon when the sun warms the land, the air above it rises and cool air from the sea moves in causing an onshore breeze and lower temps
What type of wind is the sea breeze an example of
Anabatic winds
What are katabatic winds
Katabatic winds flow down mountains and out of valleys at night and early mornings
How are katabatic winds formed
They are formed from cooling of the earth surface at night and the cooling of the air in contact with it, cold air is heavier and sinks, flowing down the mountains
Air heated by the earth’s surface rises and causes
Thermals
What happens when air is cooled below its dew point
Condensation occurs and clouds form
Hot air rising through cooler air will
Cool, if it has enough vapour it will reach its dew point and cloud will form
Can 2 children occupy one seat?
Yes, they can sit side by side provided their weight is less then 77kg and neither are infants.
CASR 91 MOS 20.03
What is the minimum flight height over populated areas and or public gatherings?
You must not fly below 1000ft over the highest feature or obsticle within a 600 meter radius
CASR 91.265 MOS 12.01
Ground effect is said to occur roughly from the ground up to how many wing spans?
1 wingspan
how does ground effect occur?
Ground effect occurs when the wings cannot produce vortices due to the viscosity of the air near the ground and thus less drag is produced by the wing
The use of one stage of flap for take off in most light aircraft, will have what effect on the climb
Change the angle of climb,
What are HHELLL checks?
Height - sufficient for recovery by 3000ft
Hatches and Harnesses - secure
Engine - FMOST
. Fuel Pump on
. Mixture rich
. Oil T and P
. Switches both mags on
. Throttle (NA for pre stall check)
Loose objects - All stowed
Location - Clear of built up areas
Look out - Complete 360 Turn
