Which of the statements concerning sound transmission underwater is incorrect?
-A: Sound will travel farther underwater then in air
-B: Divers find it difficult to locate the direction of a sound producing source
-C: Divers find it easy to talk to each other directly through water
-D: Sound tra...
SSI Open Water Diver Final Exam 2022 Graded A + (Actual test 100% verified) Which of the statements concerning sound transmission underwater is incorrect? -A: Sound will travel farther underwater then in air -B: Divers find it difficult to locate the direction of a sound producing source -C: Divers find it easy to talk to each other directly through water -D: Sound travels four times faster underwater than in air -Answer - C The absolute pressure expressed in terms of atmospheres absolute at 33 feet in sea water is: -A: 2 ata -B:1 ata -C: 4 ata -D: 3 ata -Answer - A The condition in which certain colors are diminished as depth increases is called: -A: Refraction -B: Turbidity -C: Diffusion -D: Absorption -Answer - D Earplugs: -A: Aid equalization of the middle of the ear -B: Protect against cold -C: Should never be worn while diving -D: Protect ears from squeeze -Answer - C Gauge pressure is defined as: -A: Hydrostatic pressure minus 1 ata -B: The pressure at the surface -C: The depth reading on a gauge -D: Absolute pr essure minus 1 ata -Answer - D Sinus squeeze can be prevented by: -A: Valsalva technique -B: Wearing earplugs -C: Tilting the divers head back and forth -D: Not diving with a cold -Answer - D EXAM The event that led to the use of the acronym SCUBA to descri be diving was: Development of what and when? -Answer - Demand regulator in 1943 Ear squeeze can be prevented by -A: Relaxing -B: All answers are correct -C: Never diving with a cold -D: rotating the jaw, swallowing or Valsalva -Answer - B The first symptom of a sinus squeeze is usually: -A: a dull pain deep within the head -B: a sharp pain at the base of the neck -C: a crushing pain high in the chest -D: a sharp pain above the eyes -Answer - D If you experience pain in the ear during des cent: -A: Stop the descent and ascend till the pain stops -B: abort the dive -C: place a finger in the ear canal and gently massage the ear until the pain ceases -D: continue the descent while gently exhaling into the mask -Answer - A Body heat is lost at a rate of ___ than air. -Answer - 25-30 times faster Proper equalization techniques must be learned in order to: -A: prevent sinus squeeze -B: prevent ear pain -C: prevent squeeze injuries -D: all answers are correct -Answer - D Salt water weighs ___ pounds per cubic foot and freshwater weighs ___ pounds per cubic foot. -Answer - 64/62.5 Underwater, the bending of light rays causes objects to appear to be: -Answer - Closer The purpose of equalization is to: -A: ensure the uneven application of pressure between the water and air spaces in the body -B: prevent water from entering air spaces in the body -C: introduce additional air into body air spaces in response to increasing external pressure EXAM
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