Page 1 of 188
SSI OPEN WATER DIVER FINAL EXAM
COMPLETE ACCURATE QUESTIONS AND
WELL ELABORATED ANSWERS (CORRECT
VERIFIED ANSWERS) NEWEST UPDATED
VERSION |ALREADY GRADED A+ (BRAND
NEW!) FULL REVISED!!
Question 1
As a diver descends, the pressure increases by how much for
every 10 meters (33 feet) of seawater?
A) 0.5 atm
,Page 2 of 188
B) 1 atm
C) 2 atm
D) 3 atm
Correct Answer: B) 1 atm
Rationale: Pressure increases by 1 atmosphere (14.7 psi) per
10 meters of seawater due to the weight of the water
column.
Question 2
If a diver holds their breath during ascent, what is the most
serious risk?
A) Nitrogen narcosis
B) Lung overexpansion injury
C) Decompression sickness
D) Oxygen toxicity
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Correct Answer: B) Lung overexpansion injury
Rationale: As pressure decreases, gas expands (Boyle’s Law).
Holding breath prevents expansion, risking alveolar rupture
and arterial gas embolism.
Question 3
According to Boyle’s Law, if a diver descends from the
surface to 20 meters (66 feet), the volume of air in their lungs
will:
A) Double
B) Remain the same
C) Decrease to 1/3 of original
D) Increase by 50%
Correct Answer: C) Decrease to 1/3 of original
*Rationale: Pressure at 20m = 3 atm (1 atm surface + 2 atm
from water). Volume is inversely proportional: V2 = V1 ×
(P1/P2) = V1 × (1/3).*
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Question 4
Which of the following increases underwater compared to
the surface?
A) Density
B) Light availability
C) Sound speed
D) Color saturation
Correct Answer: A) Density
Rationale: Water is approximately 800 times denser than air;
pressure increases density further with depth.
Question 5
A diver feels ear pain during descent. The correct action is:
A) Continue descending quickly
B) Ascend slightly and equalize
C) Surface immediately
D) Use a decongestant underwater
SSI OPEN WATER DIVER FINAL EXAM
COMPLETE ACCURATE QUESTIONS AND
WELL ELABORATED ANSWERS (CORRECT
VERIFIED ANSWERS) NEWEST UPDATED
VERSION |ALREADY GRADED A+ (BRAND
NEW!) FULL REVISED!!
Question 1
As a diver descends, the pressure increases by how much for
every 10 meters (33 feet) of seawater?
A) 0.5 atm
,Page 2 of 188
B) 1 atm
C) 2 atm
D) 3 atm
Correct Answer: B) 1 atm
Rationale: Pressure increases by 1 atmosphere (14.7 psi) per
10 meters of seawater due to the weight of the water
column.
Question 2
If a diver holds their breath during ascent, what is the most
serious risk?
A) Nitrogen narcosis
B) Lung overexpansion injury
C) Decompression sickness
D) Oxygen toxicity
,Page 3 of 188
Correct Answer: B) Lung overexpansion injury
Rationale: As pressure decreases, gas expands (Boyle’s Law).
Holding breath prevents expansion, risking alveolar rupture
and arterial gas embolism.
Question 3
According to Boyle’s Law, if a diver descends from the
surface to 20 meters (66 feet), the volume of air in their lungs
will:
A) Double
B) Remain the same
C) Decrease to 1/3 of original
D) Increase by 50%
Correct Answer: C) Decrease to 1/3 of original
*Rationale: Pressure at 20m = 3 atm (1 atm surface + 2 atm
from water). Volume is inversely proportional: V2 = V1 ×
(P1/P2) = V1 × (1/3).*
, Page 4 of 188
Question 4
Which of the following increases underwater compared to
the surface?
A) Density
B) Light availability
C) Sound speed
D) Color saturation
Correct Answer: A) Density
Rationale: Water is approximately 800 times denser than air;
pressure increases density further with depth.
Question 5
A diver feels ear pain during descent. The correct action is:
A) Continue descending quickly
B) Ascend slightly and equalize
C) Surface immediately
D) Use a decongestant underwater
