SSI Final Exam questions with complete solutions.

The event that led to the use of the acronym SCUBA to describe diving was: A. Post-WWII equipment refinements B. The invention of the diving helmet in circa 1800 C. The development of the demand regulator in 1943 D. The development of air pumps in the 19th century C. The development of the demand regulator in 1943 Absolute pressure is defined as: A. The pressure at the surface plus 1 ata B. The weight of the water that surrounds the diver C. The total pressure exerted on an object D. All answers are correct C. The total pressure exerted on an object 00:03 01:07 Gauge pressure is defined as: A. The depth reading on a gauge B. The pressure at the surface C. Hydrostatic pressure minus 1 ata D. Absolute pressure minus 1 ata D. Absolute pressure minus 1 ata One atmosphere of pressure is defined as: A. 1 ata B. Each 33 feet of depth in sea water C. Each 34 feet of depth in freshwater D. All answers are correct D. All answers are correct The greatest relative pressure change in seawater takes place between ____ and ____ feet. A. 0/33 B. 33/66 C. 66/99 D. 99/132 A. 0/33 If you experience pain in the ear during descent: A. Continue the descent while gently exhaling into the mask B. Stop the descent and ascend until the pain stops C. Abort the dive D. Place a finger in the ear canal and gently massage the ear until the pain ceases B. Stop the descent and ascend until the pain stops Underwater, the bending of light rays causes objects to appear to be _______. A. Closer B. Farther away C. The same as the surface D. At an angle consistent with the bend of light A. Closer Body heat is lost underwater at a rate of ______ than in air. A. 10 times slower B. 50 times faster C. 25 to 30 times faster D. same C. 25 to 30 times faster A high pressure scuba cylinder should be stored: A. Lying flat with no air B. With the valve slightly open to allow air expansion C. Secured with a minimum of 500 to 750 psi D. Secured with the valve open C. Secured with a minimum of 500 to 750 psi A scuba tank for recreational diving should be filled with: A. A mixture of helium and oxygen B. A mixture of hydrogen and oxygen C. Pure, filtered compressed air or Nitrox D. Pure oxygen C. Pure, filtered compressed air or Nitrox One of the primary factors contributing to heat loss for divers is: A. Convection B. Refraction C. Absorption D. Diffusion A. Convection The Delivery System components are: A. A regulator and an alternate air source B. A regulator, buoyancy compensation device, and a high pressure air cylinder C. A regulator, alternate air source, and a high pressure scuba cylinder D. A regulator and high pressure pressure air cylinder C. A regulator, alternate air source, and a high pressure scuba cylinder During normal diving activities, divers should never exceed an ascent rate of ____ feet per minute. A. 20 B. 9 C. 30 D. 18 C. 30 The Buoyancy Control System components are: A. Buoyancy compensator, exposure suit, and inflation device B. Regulator, inflation device, and weight belt or BC weight pockets C. Buoyancy compensator, inflation device, and weight belt or BC weight pockets D. Buoyancy compensator and inflation C. Buoyancy compensator, inflation device, and weight belt or BC weight pockets The most effective breathing pattern for scuba diving is: A. Short shallow breaths B. Long slow inhalation and faster exhalation C. A deep balanced inhalation followed by a long balanced exhalation without any pause between inhaling and exhaling D. Rapid inhalation and exhalation cycles C. A deep balanced inhalation followed by a long balanced exhalation without any pause between inhaling and exhaling Under the SSI Equipment Service Program, your Delivery System should be serviced and performance checked: A. Every five years B. Every three years C. Every month D. Every year D. Every year In air at 1 ata, the partial pressure of nitrogen is ____, oxygen is ____. A. 0.79/0.21 ata B. 0.21/0.79 ata C. 1.5/0.8 ata D. 0.8/0.4 ata A. 0.79/0.21 ata Which of the following would be inappropriate treatment for a diver evidencing symptoms of Decompression Sickness? A. Administering CPR B. Administering pure oxygen (if qualified) C. Treat for shock D. Taking the victim back in the water D. Taking the victim back in the water The only accepted treatment for Arterial Gas Embolism is: A. Immediate recompression by taking the victim underwater to relieve the symptoms B. Stabilize the victim in the nearest medical facility and transport to decompression chamber for recompression C. Surgery to repair the ruptured lung D. All are acceptable treatments B. Stabilize the victim in the nearest medical facility and transport to decompression chamber for recompression The most serious lung overexpansion injury is: A. Pneumothrax B. Arterial Gas Embolism C. Subcutaneous emphysema D. Mediastinal emphysema B. Arterial Gas Embolism Overexpansion injuries can be prevented by: A. Never holding your breath while diving B. Learning the correct breathing patterns reinforced in classroom, pool, and open water training C. Dive with a a properly maintained high-quality Total Diving System D. All answers are correct D. All answers are correct Dalton's Law can be paraphrased as: A. The total pressure of the water surrounding a diver B. The pressure of the water plus 1 ata C. The total pressure of a mixture of gases equals the sum of the partial pressures D. The percentage of nitrogen that causes decompression sickness C. The total pressure of a mixture of gases equals the sum of the partial pressures Diving at altitude or flying after diving: A. Does not require any special considerations for the diver B. Allows the diver to spend a greater amount of time at depth without exceeding the no-decompression limits C. Allows the diver to ignore the no-decompression limits D. Requires special diving computer functions, altitude tables and/or refraining from flying from at least 24 hours after the completion of a dive D. Requires special diving computer functions, altitude tables and/or refraining from flying from at least 24 hours after the completion of a dive Haldanes theory that the human body can withstand a 2:1 pressure ratio was revised by D Workman to a nitrogen ratio of: A. 5:1 B. 1:1 C. 3:1 D. 1.58:1 D. 1.58:1 A good diving buddy: A. Is able to help in all phases of diving and dive planning B. Is as familiar with their buddy's diving equipment as they are with their own C. Makes diving more fun D. All answers are correct D. All answers are correct