501. H1116 PVT (Refer to figure 25, area 1.) A glider is launched over Caddo Mills Airport with sufficient altitude to glide to Airpark East Airport, south of Caddo Mills. How long will it take for the flight at an average of 35 MPH groundspeed? A) 31 minutes. B) 27 minutes. C) 25 minutes. 502. A20 PVT Prior to becoming certified as a private pilot with a glider rating, the pilot must have in his or her possession what type of medical? A) A third-class medical certificate. B) A statement from a designated medical examiner. C) A medical certificate is not required. 503. A21 PVT To act as pilot in command of an aircraft towing a glider, a pilot is required to have made within the preceding 12 months A) at least three flights as observer in a glider being towed by an aircraft. B) at least three flights in a powered glider. C) at least three actual or simulated glider tows while accompanied by a qualified pilot. 504. B08 PVT If an altimeter setting is not available before flight, to which altitude should the pilot adjust the altimeter? A) The elevation of the nearest airport corrected to mean sea level. B) The elevation of the departure area. C) Pressure altitude corrected for nonstandard temperature. 505. B07 PVT The final authority as to the operation of an aircraft is the A) Federal Aviation Administration. B) pilot in command. C) aircraft manufacturer. 506. I55 PVT (Refer to figure 13.) What effect do the clouds mentioned in the weather briefing have on soaring conditions? A) All thermals stop at the base of the clouds. B) Thermals persist to the tops of the clouds at 25,000 feet. C) The scattered clouds indicate thermals at least to the tops of the lower clouds. 507. H1104 PVT (Refer to figure 21.) Over which area should a glider pilot expect to find the best lift under normal conditions? A) 5. B) 6. C) 7. 508. I35 PVT Where and under what condition can enough lift be found for soaring when the weather is generally stable? A) On the upwind side of hills or ridges with moderate winds present. B) In mountain waves that form on the upwind side of the mountains. C) Over isolated peaks when strong winds are present. 509. I35 PVT The development of thermals depends upon A) a counterclockwise circulation of air. B) temperature inversions. C) solar heating. 510. I35 PVT What is an important precaution when soaring in a dust devil? A) Avoid the eye of the vortex. B) Avoid the clear area at the outside edge of the dust. C) Maintain the same direction as the rotation of the vortex. 511. I35 PVT Where may the most favorable type thermals for cross-country soaring be found? A) Just ahead of a warm front. B) Along thermal streets. C) Under mountain waves. 512. I35 PVT How can a pilot locate bubble thermals? A) Look for wet areas where recent showers have occurred. B) Look for birds that are soaring in areas of intermittent heating. C) Fly the area just above the boundary of a temperature inversion. 513. I35 PVT What is the best visual indication of a thermal? A) Fragmented cumulus clouds with concave bases. B) Smooth cumulus clouds with concave bases. C) Scattered to broken sky with cumulus clouds. 514. I35 PVT What is a recommended procedure for entering a dust devil for soaring? A) Enter above 500 feet and circle the edge in the same direction as the rotation. B) Enter below 500 feet and circle the edge opposite the direction of rotation. C) Enter at or above 500 feet and circle the edge opposite the direction of rotation. 515. I35 PVT What is one recommended method for locating thermals? A) Fly an ever increasing circular path. B) Maintain a straight track downwind. C) Look for converging streamers of dust or smoke. 516. I35 PVT On which side of a rocky knoll, that is surrounded by vegetation, should a pilot find the best thermals? A) On the side facing the Sun. B) On the downwind side. C) Exactly over the center. 517. I35 PVT Which is considered to be the most hazardous condition when soaring in the vicinity of thunderstorms? A) Static electricity. B) Lightning. C) Wind shear and turbulence. 518. I35 PVT Convective circulation patterns associated with sea breezes are caused by A) warm, dense air moving inland from over the water. B) water absorbing and radiating heat faster than the land. C) cool, dense air moving inland from over the water. 519. I35 PVT During which period is a sea breeze front most suitable for soaring flight? A) Shortly after sunrise. B) During the early forenoon. C) During the afternoon. 520. I35 PVT What minimum upward current must a glider encounter to maintain altitude? A) At least 2 feet per second. B) The same as the glider's sink rate. C) The same as the adjacent down currents.

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