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SSI Open Water Diver Version B 2025 – Complete Study
Guide, Practice Questions, and Certification Prep
Prepare for your SSI Open Water Diver Version B 2025 exam with this comprehensive study
guide, featuring key scuba diving concepts, safety procedures, skills review, and practice
questions to confidently achieve your Open Water Diver certification.
• SSI Open Water Diver
• SSI Open Water Diver Version B
• SSI Open Water exam prep
• SSI Open Water certification study guide
The only accepted treatment for Arterial Gas Embolism is:
a) Immediate recompression by taking the victim underwater to relieve the symptoms
b) Surgery to repair the ruptured lung
c) Stabilize victim in nearest medical facility and transport to decompression chamber for recompression
d) All of the above - ANSWER-c) Stabilize victim in nearest medical facility and transport to
decompression chamber for recompression
The major, and most common, symptom of decompression sickness is:
a) Joint pain
b) A feeling of euphoria
c) Puffiness in the neck and shoulder areas
d) Respiratory failure - ANSWER-a) Joint pain
,2|Page
The proper first aid for arterial gas embolism, subcutaneous emphysema, pneumothorax, and
mediastinal emphysema is:
a) Administer oxygen (if qualified)
b) Watch vital signs, treat for shock and stand by to administer cardio- pulmonary resuscitation (if
qualified)
c) Seek proper medical aid (a recompression chamber) as quickly as possible
d) All of the above - ANSWER-d) All of the above
If a flexible air- filled container at 100 feet of sea water has a volume of 10 cu ft, what would be the
volume if it were transported to the surface?
a) 15 cu ft
b) 30 cu ft
c) 20 cu ft
d) 40 cu ft - ANSWER-d) 40 cu ft
Gas can enter the bloodstream and cause serious damage to the lungs or even death by:
a) Diving with respiratory infection
b) Ascending too fast
c) Holding your breath while diving
d) All of the above - ANSWER-d) All of the above
Diving at altitude or flying after diving:
a) Requires special diving computer functions, altitude tables and/ or refraining from flying from at least
24 hours after the completion of the dive
b) Allows the diver to spend a greater amount of time at depth without exceeding the no-
decompression limits
c) Allows the diver to ignore the no- decompression limits
d) Does not require any special considerations for the diver - ANSWER-a) Requires special diving
computer functions, altitude tables and/ or refraining from flying from at least 24 hours after the
completion of the dive
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Decompression sickness occurs when:
a) Excess nitrogen bubbles out of solution into the blood and tissues
b) The nitrogen tissue tolerance gradient is exceeded
c) A diver stays at depth too long and surfaces too quickly
d) All of the above - ANSWER-d) All of the above
The term gradient can be described as:
a) As always zero when the diver is super- saturated
b) The difference between the internal partial pressure and the external partial pressure of a gas
c) Total tissue saturation
d) The total pressure of all gases - ANSWER-b) The difference between the internal partial pressure and
the external partial pressure of a gas
Dalton's Law can be paraphrased as:
a) The total pressure of the water surrounding a diver
b) The pressure of the water plus 1 ata
c) The percentage of nitrogen that causes decompression sickness
d) The total pressure of a mixture of gases is equal to the sum of the partial pressures - ANSWER-d) The
total pressure of a mixture of gases equals the sum of the partial pressures
Which of the following overexpansion injuries can be characterized by chest pain, breathing difficulties,
weakness, and cyanosis (blueness) of the lips and nail beds:
a) Rupture of eardrum
b) Mediastinal emphysema and pneumothorax
c) Bends
d) Subcutaneous emphysema - ANSWER-b) Mediastinal emphysema and pneumothorax
The rate at which the body becomes saturated with nitrogen:
a) Will vary based on factors such as depth and blood supply to a particular area of the body
SSI Open Water Diver Version B 2025 – Complete Study
Guide, Practice Questions, and Certification Prep
Prepare for your SSI Open Water Diver Version B 2025 exam with this comprehensive study
guide, featuring key scuba diving concepts, safety procedures, skills review, and practice
questions to confidently achieve your Open Water Diver certification.
• SSI Open Water Diver
• SSI Open Water Diver Version B
• SSI Open Water exam prep
• SSI Open Water certification study guide
The only accepted treatment for Arterial Gas Embolism is:
a) Immediate recompression by taking the victim underwater to relieve the symptoms
b) Surgery to repair the ruptured lung
c) Stabilize victim in nearest medical facility and transport to decompression chamber for recompression
d) All of the above - ANSWER-c) Stabilize victim in nearest medical facility and transport to
decompression chamber for recompression
The major, and most common, symptom of decompression sickness is:
a) Joint pain
b) A feeling of euphoria
c) Puffiness in the neck and shoulder areas
d) Respiratory failure - ANSWER-a) Joint pain
,2|Page
The proper first aid for arterial gas embolism, subcutaneous emphysema, pneumothorax, and
mediastinal emphysema is:
a) Administer oxygen (if qualified)
b) Watch vital signs, treat for shock and stand by to administer cardio- pulmonary resuscitation (if
qualified)
c) Seek proper medical aid (a recompression chamber) as quickly as possible
d) All of the above - ANSWER-d) All of the above
If a flexible air- filled container at 100 feet of sea water has a volume of 10 cu ft, what would be the
volume if it were transported to the surface?
a) 15 cu ft
b) 30 cu ft
c) 20 cu ft
d) 40 cu ft - ANSWER-d) 40 cu ft
Gas can enter the bloodstream and cause serious damage to the lungs or even death by:
a) Diving with respiratory infection
b) Ascending too fast
c) Holding your breath while diving
d) All of the above - ANSWER-d) All of the above
Diving at altitude or flying after diving:
a) Requires special diving computer functions, altitude tables and/ or refraining from flying from at least
24 hours after the completion of the dive
b) Allows the diver to spend a greater amount of time at depth without exceeding the no-
decompression limits
c) Allows the diver to ignore the no- decompression limits
d) Does not require any special considerations for the diver - ANSWER-a) Requires special diving
computer functions, altitude tables and/ or refraining from flying from at least 24 hours after the
completion of the dive
, 3|Page
Decompression sickness occurs when:
a) Excess nitrogen bubbles out of solution into the blood and tissues
b) The nitrogen tissue tolerance gradient is exceeded
c) A diver stays at depth too long and surfaces too quickly
d) All of the above - ANSWER-d) All of the above
The term gradient can be described as:
a) As always zero when the diver is super- saturated
b) The difference between the internal partial pressure and the external partial pressure of a gas
c) Total tissue saturation
d) The total pressure of all gases - ANSWER-b) The difference between the internal partial pressure and
the external partial pressure of a gas
Dalton's Law can be paraphrased as:
a) The total pressure of the water surrounding a diver
b) The pressure of the water plus 1 ata
c) The percentage of nitrogen that causes decompression sickness
d) The total pressure of a mixture of gases is equal to the sum of the partial pressures - ANSWER-d) The
total pressure of a mixture of gases equals the sum of the partial pressures
Which of the following overexpansion injuries can be characterized by chest pain, breathing difficulties,
weakness, and cyanosis (blueness) of the lips and nail beds:
a) Rupture of eardrum
b) Mediastinal emphysema and pneumothorax
c) Bends
d) Subcutaneous emphysema - ANSWER-b) Mediastinal emphysema and pneumothorax
The rate at which the body becomes saturated with nitrogen:
a) Will vary based on factors such as depth and blood supply to a particular area of the body
