The Atmosphere Flashcards
What are thermals
Upward convective currents caused by uneven heating of the earth’s surface by solar radiation
Where is the temperature of the tropopause highest?
In the polar regions, instead of the equatorial
What time of the day does the temperature reach its minimum value?
30 minutes after dawn
What altitude change corresponds to 1 hPa at 20000 ft?
50ft
Earth heating by solar radiation is referred to as?
Insolation
Consider a stationary aircraft. What effect will decreasing pressure have on the altimeter-indicated altitude?
The indicated altitude will increase
What happens when, while passing the Transition Level, you set the subscale on your altimeter to the local QNH of 1018 hPa?
Indicated altitude will increase
What does QFF stand for
QFE reducing to MSL. Using actual temperature gradient
The QNH of an aerodrome located 30 ft below sea level is equal to 1011 hPa. The air temperature is 15°C above ISA at all altitudes. What is the QFF?
Higher than 1011 hPa
How can the difference between the true altitude and the altimeter indication be calculated?
By applying the 4% rule, knowing that per each 10 °C below ISA the altitude decreases by 4%
QNH is equal to QFE and QFF when…
At MSL
During the climb after take-off, the altimeter setting is adjusted at the transition altitude. If the local QNH is 1023 hPa, what will happen to the altimeter indication during the resetting procedure?
The altimeter indication will decrease
When no heat exchange is possible, which statement is true regarding an ascending parcel of air?
Reduce in pressure, decrease in density and increase in volume.
300 hPa pressure level in FL?
FL300
Consider a stationary aircraft. What effect will decreasing pressure have on the altimeter-indicated altitude?
The indicated altitude will increase
