2-35. “Time-liners”  are  particularly useful for making the analysis and extrapolation of which of the following  aids? 1. Trend  charts  only 2. Time-distance  charts  only 3. Isochrone  analyses 4. Trend  and  time-distance  charts 2-36. The  temperature  and  dewpoint  curves constructed on a RAOB may be used to  determine  the  presence  and thickness of cloud layers, as well as potential areas of cloud formation. 1. True 2. False 2-37. The temperature to which air must be  cooled  or  heated  adiabatically to reach saturation with respect to ice is the definition of what meteorological  term? 1. Dewpoint 2. Potential  temperature 3. Frost point 4. Relative  humidity 2-38. Under what condition will the true temperature  lie  between  the  true dewpoint and the true frost point in a cloud? 1. When  the  cloud  consists entirely  of  super-cooled  water droplets 2. When the cloud temperature is above  freezing 3. When  the  cloud  consists entirely  of  ice  crystals 4. When  the  temperature  is representative of the sub- freezing portion of a cloud 2-39. A  cirrus  cloud  is  saturated  with respect to water with a dewpoint of -31°C. What is the correct frost point to the nearest whole degree? 1. -22°C 2. -28°C 3. -34°c 4. -40°C 2-40. Assume that a sounding indicates a layer  of  moderate  decrease  in dewpoint  depression,  followed  by another  layer  of  stronger  decrease in dewpoint depression. What assumption can be made relative to the cloud layer associated with the depression? 1. The top of the cloud layer should be identified with the base  of  the  stronger  decrease 2. The top of the cloud layer should be identified with the weaker  decrease 3. The base of the cloud layer should be identified with the base  of  the  stronger  decrease 4. The base of the cloud layer should  be  identified  with  the base of the weaker decrease IN  ANSWERING  QUESTION  2-41,  REFER  TO FIGURE 4-19 IN YOUR TRAMAN. 2-41. What is the probability of clear or scattered  conditions  when  a sounding  that  terminated  at  the 850-hPa  level  indicates  a  dewpoint depression  of  6°C? 1. 20% 2. 35% 3. 60% 4. 70% 2-42. Assume  a  500-hPa  level  dewpoint depression  analysis  is  constructed to  determine  the  probable  cloud areas. Where would cloud layers be indicated? 1. At the 500-hPa level only 2. At and below the 500-hPa level only 3. At and above the 500-hPa level only 4. At, above, and below the 500-hPa  level 2-43. What is the greatest factor in determining  the  type  and  intensity of  precipitation  observed  at  the surface? 1. Cloud types 2. Thickness of the cloud types 3. Height of the base of the clouds 4. Temperature  in  the  upper portion of the clouds 13