SSI SCUBA Open Water Diving Certification Exam with complete solutions

The purpose of equalization is to - Answer- Introduce additional air into body air spaces in response to increasing external pressure Body heat is lost ________ than in air - Answer- 25 to 30 times faster The absolute pressure expressed in terms of atmospheres absolute at 99 feet in salt water - Answer- 4 ata One atmosphere of pressure is defined as - Answer- - Each 34 feet of depth in freshwater - 1 ata - Each 33 feet of depth in sea water Describing diving with the acronym SCUBA came from what event? - Answer- The development of the demand regulator in 1943 Sinus squeeze can be prevented by - Answer- Not diving with a cold The greatest relative pressure change in sea water takes place between ___ and ___ feet - Answer- 0 and 33 Underwater, the bending of light rays causes objects to appear to be: - Answer- closer Ear squeeze can be prevented by: - Answer- - Relaxing - Never diving with a cold - Rotating the jaw, swallowing, or Valsalva Earplugs... - Answer- should never been worn while diving If you experience pain in your ears during descent: - Answer- Stop the descent and ascend until the pain stops Which of the statements concerning sound transmission underwater is correct? - Answer- - Divers find it difficult to locate the direction of a sound producing source - Sound will travel farther underwater than in air - Sound travels four times faster underwater than in air The absolute pressure expressed in terms of atmospheres absolute at 33 feet in sea water is - Answer- 2 ata If a flexible air-filled container has a volume of 40 cu ft on the surface, what would the volume be at 99 feet in sea water? - Answer- 10 cu ft Gauge pressure is defined as: - Answer- Absolute pressure minus one The condition in which certain colors are diminished as depth increases is called: - Answer- Absorption your Delivery system should be serviced and preformance checked: - Answer- every year The purpose of a BC is to: - Answer- Control ascent and descent rates, maintain neutral buoyancy during the dive, provide surface flotation The Buoyancy Control System components are: - Answer- buoyancy compensator, inflation device, and weight belt A scuba cylinder must be hydrostatically tested: - Answer- Within fixed interval set by local law the SSI Equipment Service Program is designed to: - Answer- Keep all the components of the Total Diving System to Optimal Performance what affects a diver's air consumption rate? - Answer- -poor physical conditioning -extreme exertion from working heavily -extreme stress brought on by improper response to anxiety-producing situations One of the primary factors contribution to heat loss for divers is - Answer- convection Which of the following Total Diving System subsystems best describes the SCUBA unit? - Answer- The Delivery Sytem The Information System components are: - Answer- Dive computer, Analogue instruments, and SSI total dive log A high pressure scuba cylinder should be stored: - Answer- secured and with a minimum of 500 to 750 psi During normal diving activities, divers should never exceed an ascent rate of ________ feet per minute. - Answer- 30 three primary features to look for in a qualtiy Exposure System are: - Answer- thickness, fit, and seam integrity assuming a constant air consumption rate, diving at a pressure of 4 ata will use __ as much air as diving at 2 ata - Answer- 2 times a scuba tank for recreational diving should be filled with - Answer- pure, filtered compressed air or Nitrox The only accepted treatment for Arterial Gas Embolism is: - Answer- stabilize victim in nearest medical facility and transport to decompression