SSI open water final exam, SSI Open Water Final Exam, SSI Open Water Diver Final Exam Bundle

Which of the statements concerning sound transmission underwater is incorrect? -Sound will travel farther underwater then in air -Divers find it difficult to locate the direction of a sound producing source -Divers find it easy to talk to each other directly through water -Sound travels four times faster underwater than in air -Divers find it easy to talk to each other directly through water The absolute pressure expressed in terms of atmospheres absolute at 33 feet in sea water is: -2 ata -1 ata - 4 ata - 3 ata 2 ata The condition in which certain colors are diminished as depth increases is called: -Refraction -Turbidity -Diffusion -Absorption Absorption Earplugs -Aid equalization of the middle of the ear - Protect against cold -Should never be worn while diving -Protect ears from squeeze -Should never be worn while diving Gauge pressure is defined as: - Hydrostatic pressure minus 1 ata - The pressure at the surface - The depth reading on a gauge - Absolute pressure minus 1 ata - Absolute pressure minus 1 ata Sinus squeeze can be prevented by: -Valsalva technique - Wearing earplugs - Tilting the divers head back and forth - Not diving with a cold - Not diving with a cold The event that led to the use of the acronym SCUBA to describe diving was: The development of the demand regulator in 1943 Ear squeeze can be prevented by -Relaxing -All answers are correct - Never diving with a cold - rotating the jaw, swallowing or Valsalva -All answers are correct The first symptom of a sinus squeeze is usually: - a dull pain deep within the head - a sharp pain at the base of the neck - a crushing pain high in the chest - a sharp pain above the eyes - a sharp pain above the eyes If you experience pain in the ear during descent: -Stop the descent and ascend till the pain stops - abort the dive -place a finger in the ear canal and gently massage the ear until the pain ceases - continue the descent while gently exhaling into the mask - continue the descent while gently exhaling into the mask Body heat is lost at a rate of ___ than air. 25-30 times faster Proper equalization techniques must be learned in order to: -prevent sinus squeeze -prevent ear pain -prevent squeeze injuries - all answers are correct - all answers are correct Salt water weighs ___ pounds per cubic foot and freshwater weighs ___ pounds per cubic foot. 64/62.5 Underwater, the bending of light rays causes objects to appear to be: closer The purpose of equalization is to: -ensure the uneven application of pressure between the water and air spaces in the body -prevent water from entering air spaces in the body -introduce additional air into body air spaces in response to increasing external pressure -remove all fluids from body air spaces -introduce additional air into body air spaces in response to increasing external pressure One atmosphere of pressure is defined as -1 ata -each 34ft of depth in freshwater -each 33ft of depth in saltwater -all answers are correct -all answers are correct The three primary features to look for in a quality Exposure System are: Thickness,fit, seam integrity An object immersed in water will be buoyed upward by a force ______ the weight of the water it displaces. equal to A high pressure scuba cylinder should be stored: -secured with a minimum of 500 t0 750 psi -lying flat with no air -with the valve slightly open to allow air expansion -secured with the valve open -secured with a minimum of 500 t0 750 psi The most efficient breathing pattern for scuba diving is: deep balanced inhalation followed by long balanced exhalation, without any pause One of the primary factors contributing to heat loss for divers is: -Absorption -Convection -Diffusion -Refraction -Convection The Information System components are: