SSI Open Water Diver Final Exam

SSI Open Water Diver Final Exam 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 Correct 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 Correct answer - A

The condition in which certain colors are diminished as depth increases is called:

-A: Refraction

-B: Turbidity

-C: Diffusion

-D: Absorption Correct 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 Correct 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 pressure minus 1 ata Correct answer - D

Sinus squeeze can be prevented by:

-A: Valsalva technique 1 / 2

-B: Wearing earplugs

-C: Tilting the divers head back and forth

-D: Not diving with a cold Correct answer - D

The event that led to the use of the acronym SCUBA to describe diving was:

Development of what and when? Correct 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 Correct 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 Correct answer - D

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 answer - A Body heat is lost at a rate of ___ than air. Correct 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 Correct answer - D

Salt water weighs ___ pounds per cubic foot and freshwater weighs ___ pounds per cubic foot. Correct answer - 64/62.5 Underwater, the bending of light rays causes objects to appear to be: Correct answer - Closer

The purpose of equalization is to:

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