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Private Pilot : 2007年 Airman Knowledge Test Question (Written Exam)
Steady precipitation preceding a front is an indication of
A) stratiform clouds with moderate turbulence.
B) cumuliform clouds with little or no turbulence.
C) stratiform clouds with little or no turbulence.
One in-flight condition necessary for structural icing to form is
A) small temperature/dewpoint spread.
B) stratiform clouds.
C) visible moisture.
In which environment is aircraft structural ice most likely to have the highest accumulation rate?
A) Cumulus clouds with below freezing temperatures.
B) Freezing drizzle.
C) Freezing rain.
Low-level turbulence can occur and icing can become hazardous in which type of fog?
A) Rain-induced fog.
B) Upslope fog.
C) Steam fog.
What is meant by the term 'dewpoint'?
A) The temperature at which condensation and evaporation are equal.
B) The temperature at which dew will always form.
C) The temperature to which air must be cooled to become saturated.
和訳 ： 説明
The amount of water vapor which air can hold depends on the
B) air temperature.
C) stability of the air.
Clouds, fog, or dew will always form when
A) water vapor condenses.
B) water vapor is present.
C) relative humidity reaches 100 percent.
What are the processes by which moisture is added to unsaturated air?
A) Evaporation and sublimation.
B) Heating and condensation.
C) Supersaturation and evaporation.
Which conditions result in the formation of frost?
A) The temperature of the collecting surface is at or below freezing when small droplets of moisture fall on the surface.
B) The temperature of the collecting surface is at or below the dewpoint of the adjacent air and the dewpoint is below freezing.
C) The temperature of the surrounding air is at or below freezing when small drops of moisture fall on the collecting surface.
The presence of ice pellets at the surface is evidence that there
A) are thunderstorms in the area.
B) has been cold frontal passage.
C) is a temperature inversion with freezing rain at a higher altitude.
和訳 と ちょっとした解説
Private Pilot Knowｌedge Test (Private Written Exam) 05/23/2007 : 2008年の問題へ