6-34. What  is  the  primary  flight  hazard  associated with mT air on the east side of a subtropical high? 1. Coastal fog 2. Turbulence 3. Thunderstorms 4. Heavy rain and low ceilings 6-35. Which,  if  any,  of  the  following  factors  is  the primary   controller   of   Arctic   weather   and climate? 1. Land-sea-ice distribution 2. Mountain barriers 3. Insolation 4. None of the above 6-36. During   the   Arctic   summer,   the   distinction between  Arctic  and  polar  air  masses  almost disappears. 1. True 2. False 6-37. Which  of  the  following  statements  is  correct concerning Arctic air masses in winter? 1. Humidity is high 2. Cloudiness and precipitation increase 3. Temperatures  are  usually  between  0°  and 10°C 4. A large temperature inversion exists in the lower few thousand feet over land 6-38. Which of the following statements is characteristic   of   the   flying   weather   in   the Arctic? 1. It   is   worst   during   the   transition   period between the seasons 2. Fog   is   a   major   problem   over   land   in summer 3. Low   ceilings   and   visibilities   are   most frequent in winter 4. High winds, blowing snow, and turbulence are more frequent in summer 6-39. The summers of the Canadian Archipelago are best classified as 1. hot and long 2. cold and long 3. cool and short 4. warm and short 6-40. Strong surface winds are most likely to occur within the interior of the Arctic region during which of the following seasons? 1. Winter 2. Fall and winter 3. Spring and fall 4. Summer and fall 6-41. Which  of  the  following  annual  precipitation amounts   is   representative   of   Arctic   coastal areas and the Arctic ice pack? 1. 3 to 7 in. 2. 5 to 15 in. 3. 8 to 17 in. 4. 10 to 20 in. 6-42. Ice  fog  is  most  likely  to  occur  when  the  air temperature   is   around   how   many   degrees Celsius? 1. 0 2. -15 3. -30 4. -45 6-43. Diamond dust is a name that applies to 1. Arctic smoke 2. Arctic sea smoke 3. Arctic haze 4. ice fog 6-44. In the Arctic, the Sun, Moon, and other objects near the horizon often appear distorted. Why? 1. Aurora borealis 2. Inversion induced mirages 3. The highly transparent air 4. Whiteouts 6-45. In  addition  to  equal  amounts  of  skylight  and reflected   light,   what   other   conditions   are necessary to bring about a whiteout? 1. Broken snow cover, and clear sky 2. Broken snow cover, and an overcast sky 3. Unbroken snow cover, and clear sky 4. Unbroken  snow  cover,  and  a  uniformly overcast sky 6-46. The lowest recorded temperature in the world was observed in 1. Siberia 2. Greenland 3. Canadian Archipelago 4. Antarctica 34