For Question 361 select "B", "C" or "D" ("A" is selected only as an example)!
361. One weather phenomenon which will always occur when flying across a front is a change in the:
A) None of the below. B) wind direction. C) type of precipitation. D) stability of the air mass.
362. 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. D) None of the above.
363. One in-flight condition necessary for structural icing to form is:
A) small temperature/dewpoint spread. B) stratiform clouds. C) visible moisture. D) None of the above.
364. 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. D) None of the above.
365. 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. D) None of the above.
366. 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. D) None of the above.
367. The amount of water vapor which air can hold depends on the:
A) dewpoint. B) air temperature. C) stability of the air. D) None of the above.
368. Clouds, fog, or dew will always form when:
A) water vapor condenses. B) water vapor is present. C) relative humidity reaches 100 percent. D) None of the above.
369. What are the processes by which moisture is added to unsaturated air?
A) Evaporation and sublimation. B) Heating and condensation. C) Supersaturation and evaporation. D) None of the above.
370. 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. D) None of the above.