ATSC 231 Block 5 Final UPDATED
ACTUAL Questions and CORRECT
Answers
A rapid change of more than ________ of airspeed is an indication of severe wind shear. -
CORRECT ANSWER - 15 KTS
A(n) ______ is a fluctuation of wind speed with variations of 10 knots or more between peaks
and lulls. - CORRECT ANSWER - gust
Severe wind shear with a front may occur when the front at the surface is moving at a speed of at
least? - CORRECT ANSWER - 30 KTS
Severe wind shear with a front may occur when the temperature difference across the front at the
surface is _____ or more. - CORRECT ANSWER - 10 degrees F
(T or F) Most thunderstorms occur in the afternoon in the Upper Midwest (Minnesota, North
Dakota, and South Dakota). - CORRECT ANSWER - False
What time of day are thunderstorms most frequent across the Gulf Coast (Florida, Alabama,
Georgia, Mississippi)? - CORRECT ANSWER - afternoon (2 pm to 6 pm)
What are the stages in the life cycle of a thunderstorm? - CORRECT ANSWER - Cumulus
Mature
Dissipating
Which stage of the life cycle of a thunderstorm can be characterized as having just light
precipitation? - CORRECT ANSWER - Dissipating
, Which of the following is an additional requirement for severe and long-lasting thunderstorms? -
CORRECT ANSWER - Wind shear
Which of the following is a good indicator of the moisture available for thunderstorm formation?
- CORRECT ANSWER - dew point
Which thunderstorm type can be described as a line of active thunderstorms either continuous or
with breaks, including contiguous precipitation areas resulting from the existence of
thunderstorms? - CORRECT ANSWER - Multicell line
What thunderstorm type is most common in the US? - CORRECT ANSWER - multicell
cluster
(T or F) Multicell cluster thunderstorms are more difficult to circumnavigate than a single cell
thunderstorm - CORRECT ANSWER - True
What type of radar echo is produced by strong straight line winds? - CORRECT
ANSWER - Bow echo
(T or F) single cell thunderstorms are rare - CORRECT ANSWER - True
(T or F) The downdraft in a single cell thunderstorm forms within the updraft - CORRECT
ANSWER - True
What type of thunderstorm produces about 25% of all US tornadoes? - CORRECT
ANSWER - Multicell (or squall) line
What type of thunderstorm does not develop in a sheared environment? - CORRECT
ANSWER - Single cell
What is another name for a single cell thunderstorm? - CORRECT ANSWER - Airmass
ACTUAL Questions and CORRECT
Answers
A rapid change of more than ________ of airspeed is an indication of severe wind shear. -
CORRECT ANSWER - 15 KTS
A(n) ______ is a fluctuation of wind speed with variations of 10 knots or more between peaks
and lulls. - CORRECT ANSWER - gust
Severe wind shear with a front may occur when the front at the surface is moving at a speed of at
least? - CORRECT ANSWER - 30 KTS
Severe wind shear with a front may occur when the temperature difference across the front at the
surface is _____ or more. - CORRECT ANSWER - 10 degrees F
(T or F) Most thunderstorms occur in the afternoon in the Upper Midwest (Minnesota, North
Dakota, and South Dakota). - CORRECT ANSWER - False
What time of day are thunderstorms most frequent across the Gulf Coast (Florida, Alabama,
Georgia, Mississippi)? - CORRECT ANSWER - afternoon (2 pm to 6 pm)
What are the stages in the life cycle of a thunderstorm? - CORRECT ANSWER - Cumulus
Mature
Dissipating
Which stage of the life cycle of a thunderstorm can be characterized as having just light
precipitation? - CORRECT ANSWER - Dissipating
, Which of the following is an additional requirement for severe and long-lasting thunderstorms? -
CORRECT ANSWER - Wind shear
Which of the following is a good indicator of the moisture available for thunderstorm formation?
- CORRECT ANSWER - dew point
Which thunderstorm type can be described as a line of active thunderstorms either continuous or
with breaks, including contiguous precipitation areas resulting from the existence of
thunderstorms? - CORRECT ANSWER - Multicell line
What thunderstorm type is most common in the US? - CORRECT ANSWER - multicell
cluster
(T or F) Multicell cluster thunderstorms are more difficult to circumnavigate than a single cell
thunderstorm - CORRECT ANSWER - True
What type of radar echo is produced by strong straight line winds? - CORRECT
ANSWER - Bow echo
(T or F) single cell thunderstorms are rare - CORRECT ANSWER - True
(T or F) The downdraft in a single cell thunderstorm forms within the updraft - CORRECT
ANSWER - True
What type of thunderstorm produces about 25% of all US tornadoes? - CORRECT
ANSWER - Multicell (or squall) line
What type of thunderstorm does not develop in a sheared environment? - CORRECT
ANSWER - Single cell
What is another name for a single cell thunderstorm? - CORRECT ANSWER - Airmass
