| Question 1: Some of the most dangerous types of holes are formed by lowhead dams (________), underwater ledges, and similar types of obstruction. | |||
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| Question 2: A particularly notorious undercut rock is Dimple Rock, in Dimple Rapid on the Lower ________ in Pennsylvania. | |||
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| Question 3: ________ are often made of fiberglass, kevlar, plastic or a combination of the three for strength and durability. | |||
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| Question 4: The dangers can be mitigated (but not eliminated) by training, experience, scouting, the use of safety equipment (such as ________, helmet, throw ropes), and using other persons as "spotters". | |||
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| Question 5: Typical whitewater rafts are inflatable craft, made from high strength fabric coated with PVC, Urethane, Neoprene or Hypalon; see ________. | |||
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| Question 6: Undercuts are most common in rivers where the riverbed cuts through sedimentary rocks like limestone rather than igneous rock like ________. | |||
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| Question 7: ________ are formed in a similar nature to hydraulics and are sometimes also considered hydraulics as well. | |||
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| Question 8: ________ and Turbulence for an academic explanation of whitewater features | |||
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| Question 9: This essential skill of whitewater kayaking is called the "________," or simply "Roll." Kayaks are paddled in a low sitting position (legs extended forward), with a two-bladed paddle. | |||
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| Question 10: Holes can be particularly dangerous—a boater may become stuck in the recirculating water—or entertaining playspots, where paddlers use the holes' features to perform various ________ moves. | |||
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