SSI open water final exam 2022/2023
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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 produci... ng 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 00:33 01:15 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 [Show More]
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