CTO Exam (15Q)
The uneven heating of adjacent bodies of air causing warm air to be drawn upwards,
and more dense air downward defines - answerConvective Currents
Air is deflected to the right in the Northern Hemisphere and to the left in the Southern
Hemisphere due to - answerThe Coriolis Force
A narrow, high-speed, meandering band of air moving at high altitude is called a(n) -
answerJet stream
Clear Air Turbulence (CAT) most generally occurs at high altitudes and in the vicinity of
- answerThe jet stream
In the Northern Hemisphere, air movement around a low pressure center flows in a(n)
___________________________ direction - answerCounterclockwise
When a mass of cold air replaces warm air, a ___________ front occurs - answerCold
Behind a fast moving cold front, you can expect _________________ skies with gusty
and turbulent winds. - answerClearing
Warm air slides over a wedge of colder air when a __________ front progresses
forward. - answerWarm
The three principle types of fronts are cold, warm, and - answerStationary
The standard pressure at sea level is _____________ inches of mercury. - answer29.92
An altimeter depicts indicated altitude, which is altitude expressed as height above -
answerSea level
Two types of barometers used to
measure atmospheric pressure are
_________ and _________. - answerAneroid, Mercurial
Lines drawn on a weather map around
pressure areas to connect the points of
equal pressure are called - answerIsobars
The decrease of temperature with and increase in height is defined as - answerLapse
rate (Adiabatic)
,In the troposphere, the lapse rate is approximately - answerTwo degrees centigrade per
one thousand feet
An increase in temperature of the atmosphere with an increase of altitude height defines
a(n) - answerInversion
Pressure, temperature, and humidity are used to determine - answerAir density
The three types of aircraft icing are - answerClear, Rime, and Mixed
Clear ice is considered dangerous to aircraft in flight because it is - answerDifficult to
remove
When the rate of accumulation is such that deicing/anti-icing equipment fails to reduce
or control the hazard best defines as - answerSevere Icing
Wind direction is determined by the direction - answerFROM WHICH the wind is
blowing
Wind speed is the average speed given in - answerKnots
Small, dangerous downdrafts of wind extending horizontally 2.5 miles or less with wind
speeds up to 150 knots are known as - answerMicrobursts
A change in wind speed and/or direction in a short distance is a - answerWindshear
Airports equipped with Low Level Wind Shear Alert System (LLWAS) network
expansion (LLWAS systems integrated with Terminal Doppler Weather Radar (TDWR)
and TDWR systems) provides the capability of detecting wind shear alerts and -
answerMicroburst activity
The weather phenomenon particularly hazardous to aviation is - answerThunderstorm
The initial stage of a thunderstorm is from a _____________ cloud. - answerCumulus
The mature stage of a thunderstorm is reached when - answerPrecipitation begins
A violently rotating column of air in contact with the ground and associated with a
thunderstorm is called a - answerTornado
A squall line is a narrow band of active - answerThunderstorms
The two greatest thunderstorm hazards to an aircraft are - answerHail and Turbulence
, The most common forms of precipitation which cause restrictions to visibility are -
answerRain, Drizzle, Snow
Rain rarely reduces surface visibility to less than - answerOne mile
One of the most common and persistent weather hazards encountered in aviation is -
answerFog
The most frequent cause of surface visibility below 3 miles is - answerFog
Two basic types of cloud formations are - answerCumulus and Stratus
Clouds formed by vertical currents of unstable air are called - answerCumulus clouds
Clouds formed by the cooling of unstable air are called - answerStratus clouds
Station identifiers for all weather reporting stations in the continuous United States will
begin with the letter - answerK
"Broken sky cover means that _____ through _____ of the sky is obscured by clouds -
answer5/8 7/8
In METAR report, the height of the base of each cloud layer is reported in _____ of feet
Above Ground Level (AGL) - answerHundreds
Decode "SCT020 BKN 250" - answerTwo thousand scattered ceiling two five thousand
broken
Decode "Few 025 TCU SCT040" - answerFew clouds at two thousand five hundred
towering cumulus four thousand scattered
Decode "CIG 005V008" - answerCeiling variable between five hundred and eight
hundred
Decode "+TSRAGR" - answerThunderstorm
Heavy Rain
Hail
In a METAR report, the altimeter element follows the - answerTemperature/Dewpoint
The greatest distance that can be seen through at least half of the horizon circle
describes ________________ visibility. - answerPrevailing
Tower personnel shall take prevailing visibility observations whenever the prevailing
visibility is less than - answerFour miles
The uneven heating of adjacent bodies of air causing warm air to be drawn upwards,
and more dense air downward defines - answerConvective Currents
Air is deflected to the right in the Northern Hemisphere and to the left in the Southern
Hemisphere due to - answerThe Coriolis Force
A narrow, high-speed, meandering band of air moving at high altitude is called a(n) -
answerJet stream
Clear Air Turbulence (CAT) most generally occurs at high altitudes and in the vicinity of
- answerThe jet stream
In the Northern Hemisphere, air movement around a low pressure center flows in a(n)
___________________________ direction - answerCounterclockwise
When a mass of cold air replaces warm air, a ___________ front occurs - answerCold
Behind a fast moving cold front, you can expect _________________ skies with gusty
and turbulent winds. - answerClearing
Warm air slides over a wedge of colder air when a __________ front progresses
forward. - answerWarm
The three principle types of fronts are cold, warm, and - answerStationary
The standard pressure at sea level is _____________ inches of mercury. - answer29.92
An altimeter depicts indicated altitude, which is altitude expressed as height above -
answerSea level
Two types of barometers used to
measure atmospheric pressure are
_________ and _________. - answerAneroid, Mercurial
Lines drawn on a weather map around
pressure areas to connect the points of
equal pressure are called - answerIsobars
The decrease of temperature with and increase in height is defined as - answerLapse
rate (Adiabatic)
,In the troposphere, the lapse rate is approximately - answerTwo degrees centigrade per
one thousand feet
An increase in temperature of the atmosphere with an increase of altitude height defines
a(n) - answerInversion
Pressure, temperature, and humidity are used to determine - answerAir density
The three types of aircraft icing are - answerClear, Rime, and Mixed
Clear ice is considered dangerous to aircraft in flight because it is - answerDifficult to
remove
When the rate of accumulation is such that deicing/anti-icing equipment fails to reduce
or control the hazard best defines as - answerSevere Icing
Wind direction is determined by the direction - answerFROM WHICH the wind is
blowing
Wind speed is the average speed given in - answerKnots
Small, dangerous downdrafts of wind extending horizontally 2.5 miles or less with wind
speeds up to 150 knots are known as - answerMicrobursts
A change in wind speed and/or direction in a short distance is a - answerWindshear
Airports equipped with Low Level Wind Shear Alert System (LLWAS) network
expansion (LLWAS systems integrated with Terminal Doppler Weather Radar (TDWR)
and TDWR systems) provides the capability of detecting wind shear alerts and -
answerMicroburst activity
The weather phenomenon particularly hazardous to aviation is - answerThunderstorm
The initial stage of a thunderstorm is from a _____________ cloud. - answerCumulus
The mature stage of a thunderstorm is reached when - answerPrecipitation begins
A violently rotating column of air in contact with the ground and associated with a
thunderstorm is called a - answerTornado
A squall line is a narrow band of active - answerThunderstorms
The two greatest thunderstorm hazards to an aircraft are - answerHail and Turbulence
, The most common forms of precipitation which cause restrictions to visibility are -
answerRain, Drizzle, Snow
Rain rarely reduces surface visibility to less than - answerOne mile
One of the most common and persistent weather hazards encountered in aviation is -
answerFog
The most frequent cause of surface visibility below 3 miles is - answerFog
Two basic types of cloud formations are - answerCumulus and Stratus
Clouds formed by vertical currents of unstable air are called - answerCumulus clouds
Clouds formed by the cooling of unstable air are called - answerStratus clouds
Station identifiers for all weather reporting stations in the continuous United States will
begin with the letter - answerK
"Broken sky cover means that _____ through _____ of the sky is obscured by clouds -
answer5/8 7/8
In METAR report, the height of the base of each cloud layer is reported in _____ of feet
Above Ground Level (AGL) - answerHundreds
Decode "SCT020 BKN 250" - answerTwo thousand scattered ceiling two five thousand
broken
Decode "Few 025 TCU SCT040" - answerFew clouds at two thousand five hundred
towering cumulus four thousand scattered
Decode "CIG 005V008" - answerCeiling variable between five hundred and eight
hundred
Decode "+TSRAGR" - answerThunderstorm
Heavy Rain
Hail
In a METAR report, the altimeter element follows the - answerTemperature/Dewpoint
The greatest distance that can be seen through at least half of the horizon circle
describes ________________ visibility. - answerPrevailing
Tower personnel shall take prevailing visibility observations whenever the prevailing
visibility is less than - answerFour miles
