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