Exam (elaborations) SSI Open Water Diver Certification

Describing diving with the acronym SCUBA came from what event? correct answer The development of the demand regulator in 1943. Earplugs: correct answer Should never be worn while diving. 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? (rounded off) correct answer10 cu Absolute pressure is defined as: correct answer The total pressure exerted on an object. The greatest relative pressure change in sea water takes place between ____ and ____ feet. correct answer0/33 ft One atmosphere of pressure is defined as: correct answer Each 33 ft of depth in seawater; 34 ft of depth in freshwater; 1 ATA Underwater, the bending of light rays causes objects to appear to be: correct answer Closer. If you experience pain in your ears during descent: correct answer Stop the descent and ascend until the pain stops. The absolute pressure expressed in terms of atmospheres absolute at 33 feet in sea water is: correct answer2 ATA Ear Squeeze can be prevented by: correct answer Relaxing; never diving with a cold; and rotating the jaw, swallowing, or Valsalva The condition in which certain colors are diminished as depth increases is called: correct answer Absorption. Gauge pressure is defined as: correct answer Absolute pressure minus 1 ATA Sinus squeeze can be prevented by: correct answer Not diving with a cold. Which of the statements concerning sound transmission underwater is correct? correct answer Sound travels four times faster in water than in air; sound travels farther underwater than air; divers find it difficult to locate the source of the sound underwater