JX101 Flashcards
What is the stratosphere characterized by?
Smooth flying conditions and excellent visibility
What is the standard sea level temperature in degrees Celsius (° C)?
15
With a pressure change of 1.0 in – Hg, how many feet will the altimeter reading change?
1000
If the air is colder than the standard atmosphere, the aircraft will be ______ than the altimeter indicates?
Lower
What is the initiating force for all winds?
Pressure gradient force
Low pressure results from ascending/descending air?
Ascending
The jet stream is the narrow band of strong winds where are they found?
Below the tropopause
What type of clouds contain numerous hazards such as severe to extreme turbulence, hail, icing, and lightning?
Cumulonimbus
Three forms of precipitation are ?
Drizzle, rain, frozen
The four methods of atmospheric lifting are?
convergence, frontal, thermal, and orographic
Air that after being lifted has the same temperature as the surrounding air, is called?
Neutrally stable air
A weak pressure gradient force would be indicated by a wide/narrow isobar spacing?
Wide
A condition where the air temperature aloft is higher than that of the lower atmosphere is generally referred to as what?
A temperature inversion
The forces that determine the wind direction in the atmosphere are weakened at the Earth’s surface by what?
The force of friction
What is The height of an aircraft above the ground known as?
Absolute/true
What do you call air when it contains the maximum moisture possible for a given temperature?
Saturated
The decrease in atmospheric temperature with increasing altitude is called what?
Lapse rate
What reduces the speed of the wind below 2000 feet AGL?
Friction
Standard sea level pressure is what?
1013.2 mb or 29.92 in HG
Names of middle clouds contain what prefix?
Alto
What is the standard temperature lapse rate of the atmosphere in °Celsius per 1000 feet?
2.0
Lifted air that is warmer than surrounding air continues to rise and indicates what?
An unstable condition
For every 11° C the temperature varies from the standard, how big will the altimeter error be?
4 %
In which atmospheric layer does weather normally occur?
Troposphere
