311. - PLT511
One weather phenomenon which will always occur when flying across a front is a change in the
A) wind direction.
B) type of precipitation.
C) stability of the air mass.
和訳 ： 解説
312. - PLT511
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.
和訳 ： 解説
313. - PLT274
One in-flight condition necessary for structural icing to form is
A) small temperature/dewpoint spread.
B) stratiform clouds.
C) visible moisture.
和訳と解説 ： Icingについて
314. - PLT274
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.
和訳と解説 ： Icingについて
315. - PLT226
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.
和訳 ： Fogの説明
316. - PLT512
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.
和訳と解説 ： もうちょっと説明
317. - PLT512
The amount of water vapor which air can hold depends on the
A) dewpoint.
B) air temperature.
C) stability of the air.
和訳 ： 説明
318. - PLT512
Clouds, fog, or dew will always form when
A) water vapor condenses.
B) water vapor is present.
C) relative humidity reaches 100 percent.
和訳 ： 説明
319. - PLT512
What are the processes by which moisture is added to unsaturated air?
A) Evaporation and sublimation.
B) Heating and condensation.
C) Supersaturation and evaporation.
和訳 ： 説明
320. - PLT493
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.
和訳 ： 説明
