SSI Open Water Diver Exam

Gauge pressure is defined as: - Answer- Absolute pressure minus 1 ata Underwater, the bending of light causes objects to: - Answer- Appear closer Absolute pressure is defined as: - Answer- Total pressure exerted on an object Describing SCUBA came from what event? - Answer- Development of the demand regulator in 1943 If you experience pain in your ears during decent? - Answer- Stop the decent and ascend until the pain stops The condition in which certain colors are diminished at depth? - Answer- Absorption Ear squeeze can be prevented by? - Answer- Rotating the jaw, swallowing, valsalva Relaxing Never diving with a cold The first sign of a sinus squeeze? - Answer- Crushing, wedging pain between the eyes The SSI equipment service program is designed to? - Answer- Keep all of the components of the total diving system to optimal performance The three primary features to look for in an exposure system are? - Answer- Thickness, fit, seam integrity The most efficient breathing pattern for SCUBA is? - Answer- A deep balanced inhalation followed by a balanced exhalation with no pauses in between During normal diving conditions, never exceed an ascent rate of? - Answer- 30 feet per minute The purpose of the BC is to? - Answer- Control ascent and descent rates Provide surface flotation Maintain neutral buoyancy Under the SSI equipment service program, your delivery system should be serviced every? - Answer- Every year A SCUBA cylinder must be hydrostatically tested every: - Answer- Within fixed intervals set by local law The information system components are? - Answer- Dive Computer, Analogue Instruments, if the Dive Computer does not supply all necessary information, and SSI Total DiveLog Which of the following overexpansion injuries can be characterized by swelling in the neck area with a crackling sensation upon touching the swollen area? - Answer- Subcutaneous emphysema The only accepted treatment for Arterial Gas Embolism is: - Answer- Stabilize the victim, medical treatment, decompression chamber Haldanes theory that the human body can withstand a 2:1 pressure difference was revised by D Workman to a nitrogen ratio of: - Answer- 1.58 : 1 The transfer of oxygen and nitrogen into the bloodstream occurs through the walls of the: - Answer- Alveoli The most serious lung overexpansion injury is: - Answer- Arterial gas embolism Dalton's Law can be paraphrased as: - Answer- The total pressure of a mixture of gases equals the sum of the partial pressures The proper first aid for Arterial Gas embolism, Subcutaneous emphysema, Pneumothorax, and Mediastinal Emphysema is: - Answer- Administer oxygen (if qualified) Seek proper medical aid (recompression chamber) Watch vital signs, treat for shock, administer CPR (if qualified) Decompression sickness occurs when? - Answer- Nitrogen tissue tolerance gradient is exceeded A diver stays at depth too long and surfaces too quickly Excess nitrogen bubbles out of solution and into the blood and tissues No decompression limit is defined as? - Answer- Maximum time allowed at depth without having to perform mandatory decompression stops during the ascent Surface interval is defined as? - Answer- The amount of time the diver spends out of the water or on the surface between dives To use a compass to navigate to a sighted object? - Answer- Point the compass toward the object, rotate the bezel until the witness marks are over the magnetic needle, and follow the lubber line T/F It is ok to share a dive computer with a buddy - Answer- False Dive computers are essential for planning and executing dives because they? - Answer- Record all pertinent information Help divers stay within no decompression limits Monitor ascents and descents Residual nitrogen is defined as? - Answer- The amount of excessive nitrogen dissolved in our blood stream and tissues after a dive T/F You should perform a safety stop at 15 feet for 3-5 minutes on every dive? - Answer- True Repetitive dive is defined as? - Answer- Any dive started more than 10 minutes and less than 12 hours after a previous dive If a diver is injured by harmful sea life, it is usually because? - Answer- Divers ignorance Divers negligence Divers aggressiveness Two examples of soft corrals are? - Answer- Black and red corral Two examples of hard corrals are? - Answer- Elkhorn and staghorn The ocean is an important host of sea life because? - Answer- Sea life serves as the first link in the food chain Examples of fresh water life include? - Answer- Bass Eels Crayfish Divers should avoid all contact with coral because? - Answer- Contact can be harmful for the diver Touching coral can damage your equipment Contact can damage the coral Coral reefs are formed by? - Answer- Coral animals called polyps that form skeletal structures Water comprises ____ of the earth's surface? - Answer- 72% T/F In a deep water out of air emergency, and your buddy is not close enough, the best response to this emergency is to perform