SDI Certification Exam Review Questions and Answers 100% Pass

SDI Certification Exam Review Questions and Answers 100% Pass What does SCUBA stand for? - Self Contained Underwater Breathing Apparatus List the three important scuba diving changes that occurred in the 1950s - 1) Dive tables published for repetitive dives 2) Improved design/quality of scuba gear 3) Dive computers commercially available 2 100% Pass Guarantee Katelyn Whitman, All Rights Name three different devices that modern dive computers replace - Depth gauge, dive tables, watch What sets SDI apart from other training agencies? - Students use a personal dive computer for all instruction and certification dives How much larger and closer do objects appear under water and why? - 33% larger, 25% closer Light bends in the air-space between the lens and your eyes. How much faster does sound move through water than air and why? - 4 times faster in water Water is 800x denser than air; sound travels through denser mediums at faster rates What is the first color absorbed underwater? - RED (followed by OYGBIV) When diving from shore, the best time to dive is when there is the least amount of tidal current. _____ tide is when there is no horizontal water movement. - Slack 3 100% Pass Guarantee Katelyn Whitman, All Rights If you are caught in a rip current, first swim _____ to the current to get out of it before swimming towards shore. - Perpendicular Start your dive by swimming ____ the current - into/against Global currents are _____. Local currents ____. - Fixed Fluctuate Rip current - Current which goes seaward due to ocean floor stuctures Long shore current - Flows parallel to shore Waves are caused by - energy generated by WIND Tides are caused by - polarity of the moon