SDI Open Water Scuba Diver Practice Exam

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Prepare for the SDI Open Water Scuba Diver Exam. Study comprehensively with flashcards and multiple choice questions, detailed explanations aid understanding. Gear up for your certification!

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

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How much faster does water conduct heat away from your body compared to air?

15 times
20 times
25 times
30 times

The correct answer is: 25 times

Water conducts heat away from your body approximately 25 times faster than air. This significant difference is crucial for divers to understand because it highlights the importance of having appropriate thermal protection when submerged. The higher thermal conductivity of water means that divers can lose body heat much more rapidly when they are in cold water compared to how they would in the air. Being aware of this factor helps divers make informed decisions about the gear they need to wear, such as wetsuits or drysuits, to minimize heat loss and prevent hypothermia during dives. The correct answer reflects the widely accepted understanding of thermal conductivity in different media, reinforcing the necessity for divers to prepare adequately for varying water temperatures.