CPAER Meteorology Test 2024/2025 Questions and
Answers Verified
What is the primary driver of weather? - ANSWER Uneven heating of the surface of the
earth
In a standard atmosphere the environmental lapse rate is - ANSWER 2º per 1,000ft
The dry adiabatic lapse rate is - ANSWER 3º per 1,000ft
The wet adiabatic lapse rate is - ANSWER 1.5º per 1,000ft
A stable atmosphere occurs when the environmental lapse rate is - ANSWER Shallow or
negative
An unstable atmosphere occurs when the environmental lapse rate is - ANSWER Steeper
than both the wet and dry adiabatic lapse rates
A potentially unstable atmosphere occurs when the environmental lapse rate is -
ANSWER Somewhere between the dry an wet adiabatic lapse rates
ISA - ANSWER 15º and pressure at sea level of 29.92" (1013.2hpa)
The average height of the tropopause is - ANSWER 36,000ft
For every 1,000ft climbed, mercury drops approximately - ANSWER 1"
, Relative humidity - ANSWER The amount of water in the air relative to the maximum it
can hold at given temperature and pressure
Dewpoint - ANSWER The temperature at which condensation begins
Is humid air or dry air more dense? - ANSWER Dry air
Convection - ANSWER Vertical movement of air
Advection - ANSWER Horizontal movement of air
Deposition - ANSWER When gas changes *directly* to a solid
Isobars - ANSWER Lines of constant/equal pressure
Isotachs - ANSWER Lines of constant/equal wind velocity
Contour lines - ANSWER Lines where the altitude at which a specified pressure occurs is
constant
Cloudy/rainy weather is associated with - ANSWER Low pressure system (ascending air)
Which way does air circulate in a low pressure system? - ANSWER Counter-clockwise
Warm/sunny weather is associated with - ANSWER High pressure system (descending
air)
Answers Verified
What is the primary driver of weather? - ANSWER Uneven heating of the surface of the
earth
In a standard atmosphere the environmental lapse rate is - ANSWER 2º per 1,000ft
The dry adiabatic lapse rate is - ANSWER 3º per 1,000ft
The wet adiabatic lapse rate is - ANSWER 1.5º per 1,000ft
A stable atmosphere occurs when the environmental lapse rate is - ANSWER Shallow or
negative
An unstable atmosphere occurs when the environmental lapse rate is - ANSWER Steeper
than both the wet and dry adiabatic lapse rates
A potentially unstable atmosphere occurs when the environmental lapse rate is -
ANSWER Somewhere between the dry an wet adiabatic lapse rates
ISA - ANSWER 15º and pressure at sea level of 29.92" (1013.2hpa)
The average height of the tropopause is - ANSWER 36,000ft
For every 1,000ft climbed, mercury drops approximately - ANSWER 1"
, Relative humidity - ANSWER The amount of water in the air relative to the maximum it
can hold at given temperature and pressure
Dewpoint - ANSWER The temperature at which condensation begins
Is humid air or dry air more dense? - ANSWER Dry air
Convection - ANSWER Vertical movement of air
Advection - ANSWER Horizontal movement of air
Deposition - ANSWER When gas changes *directly* to a solid
Isobars - ANSWER Lines of constant/equal pressure
Isotachs - ANSWER Lines of constant/equal wind velocity
Contour lines - ANSWER Lines where the altitude at which a specified pressure occurs is
constant
Cloudy/rainy weather is associated with - ANSWER Low pressure system (ascending air)
Which way does air circulate in a low pressure system? - ANSWER Counter-clockwise
Warm/sunny weather is associated with - ANSWER High pressure system (descending
air)
