SDI Open Water Exam Update Latest
2024 | SSI Open Water Final Exam 2024
Questions and Correct Answers Rated
A+
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 producing
source
-Divers find it easy to talk to each other directly through water
-Sound travels four times faster underwater than in air -ANSWER--
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 -ANSWER-2 ata
The condition in which certain colors are diminished as depth
increases is called:
-Refraction
-Turbidity
-Diffusion
-Absorption -ANSWER-Absorption
Earplugs
-Aid equalization of the middle of the ear
,- Protect against cold
-Should never be worn while diving
-Protect ears from squeeze -ANSWER--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 -ANSWER-- 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 -ANSWER-- Not diving with a cold
The event that led to the use of the acronym SCUBA to describe
diving was: -ANSWER-The development of the demand regulator in
1943
Ear squeeze can be prevented by
-Relaxing
-All answers are correct
- Never diving with a cold
- rotating the jaw, swallowing or Valsalva -ANSWER--All answers are
correct
The first symptom of a sinus squeeze is usually:
- a dull pain deep within the head
- a sharp pain at the base of the neck
, - a crushing pain high in the chest
- a sharp pain above the eyes -ANSWER-- a sharp pain above the
eyes
If you experience pain in the ear during descent:
-Stop the descent and ascend till the pain stops
- abort the dive
-place a finger in the ear canal and gently massage the ear until the
pain ceases
- continue the descent while gently exhaling into the mask -ANSWER-
- continue the descent while gently exhaling into the mask
Body heat is lost at a rate of ___ than air. -ANSWER-25-30 times
faster
Proper equalization techniques must be learned in order to:
-prevent sinus squeeze
-prevent ear pain
-prevent squeeze injuries
- all answers are correct -ANSWER-- all answers are correct
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:
-ensure the uneven application of pressure between the water and air
spaces in the body
-prevent water from entering air spaces in the body
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