Meteorology

Question 1

Standard pressure

Answer 1

Sea level: 1013.25 hPa
10 000 ft: 700 hPa
18 000 ft: 500 hPa
30 000 ft: 300 hPa

Question 2

Tropopause height and temperature

Answer 2

Equator: 16km -75*C
Poles:      8km -45*C
Mid latitudes
   In summer: 12km -55*C
   In winter:     9km

Question 3

QNH vs QFF in cold and warm air

Answer 3

In cold air: QNH > QFF, altimeter overreads

In warm air: QNH < QFF, altimeter underreads

Question 4

Temperature Error adjustment

Answer 4

Temperature Error = 4 x Height in 1000 ft x ISA deviation

Question 5

Density Altitude

Answer 5

Density Altitude = Pressure Altitude + 120 x ISA deviation

Question 6

Specific Heat

Answer 6

Specific Heat = Energy / Temperature rise

1. 0 for water
2. 5 for ice
3. 25 for land

Question 7

Latent Heat

Answer 7

Latent Heat is energy consumed / released upon state transition

Ice&raquo_space; Water: 80 cal/g
Water&raquo_space; Vapour: 540 cal/g

Question 8

Standard Pressure at Altitude

Answer 8

SL: 1013 hPa
10000 ft: 700 hPa
18000 ft: 500 hPa
30000 ft: 300 hPa