SDI Exam 2024 Questions with 100% Correct Answers | Verified | Latest Update

1. Objects under water appear ANS Closer and larger than they do on land 2. What happens to colors under water ANS As you descend, colors appear to fade, not intensify. Blues and grays are the last remaining colors at depth. 3. Because sound travels faster under water ANS Sound's increases speed under water makes it harder to determine the direction from which it is coming. 4. Water conducts heat away from your body times faster than air does ANS 25 5. The presence of thermoclines means that ANS divers may require more in the way of exposure protection at depth than they will at the surface. 6. Tides can ANS - make water seem deeper or shallower, stronger and difficult, ad- verse effect on visibility 7. Cause of permanent ocean currents ANS The sun warming water near the equator, coupled with the earth's rotation, is the primary cause of permanent ocean currents. 8. Wave height and length ANS Wave height is the distance from its highest point (crest) to its lowest point (trough). Wave length is the distance from crest to crest. formation of surf ANS A wave encountering shallow water begins to slow at its bottom, while the top of the wave continues at its previous speed. This causes the wave to break