Exam (elaborations) SCUBA, SSI Open Water Diver

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 correct answer A: 2 ata 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 pressure minus 1 ata correct answer D: Gauge pressure is defined as Absolute pressure minus 1 ata 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 correct answerD: a sharp pain above the eyes If you experience pain in the ear during descent: -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 correct answerA: Stop the descent and ascend till the pain stops. Body heat is lost at a rate of ___ than air. correct answer25-30 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 correct answerD