SSI OPEN WATER DIVER LATEST 2026 PRACTICE EXAM
QUESTIONS AND ANSWERS MARKED A+
✔✔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? - ✔✔40 cu ft
✔✔The transfer of oxygen and nitrogen into the bloodstream occurs through the walls of
the - ✔✔Alveoli
✔✔Decompression sickness occurs when - ✔✔Divers stay at depth too long and
surface too quickly
Excess nitrogen bubbles into the blood and tissue
Nitrogen tissue tolerance gradient exceeded
✔✔In air at 1 ata, the partial pressure of nitrogen is___, oxygen is_____ - ✔✔0.79/0.21
ata
✔✔The only accepted treatment for Arterial Gas Embolism is - ✔✔Stablize victim and
transport to nearest decompression chamber
✔✔The proper first aid for Arterial Gas embolism, Subcutaneous emphysema,
Pneumothorax, and Mediastinal Emphysema is: - ✔✔Administer oxygen
Seek proper medical aid
Watch vital signs, treat for shock and stand by to administer CPR
✔✔Dalton's Law can be paraphrased as: - ✔✔The total pressure of a mixture of gases
equals the sum of the partial pressures
✔✔Other symptoms of decompression sickness include - ✔✔Itchy skin
Numbness
Paralysis and loss of manual dexterity
✔✔Overexpansion injuries can be prevented by: - ✔✔Learning correct breathing
patterns
Never holding your breath
Dive with proper equipment
✔✔Which of the following would be inappropriate treatment for a diver exhibiting
symptoms of Decompression Sickness? - ✔✔Taking the victim back underwater
✔✔Diving at altitude or flying after diving - ✔✔Requires special diving computer
functions, altitude tables and/or refraining from flying from at least 24 hours after the
completion of a dive
, ✔✔he best prevention for decompression sickness is to - ✔✔Plan your dive and dive
your plan
✔✔Which of the following overexpansion injuries can be characterized by chest pain,
breathing difficulties, weakness, and cyanosis (blueness) of the lips and nail beds: -
✔✔Mediastinal Emphysema and Pneumothorax
✔✔The term gradient can be described as: - ✔✔The difference between the internal
partial pressure and the external partial pressure of a gas
✔✔The most serious lung overexpansion injury is - ✔✔Arterial Gas Embolism
✔✔Haldanes theory that the human body can withstand a 2:1 pressure difference was
revised by D Workman to a nitrogen ratio of: - ✔✔1.58:1
✔✔The reciprocal azimuth for an initial azimuth of 60º is: - ✔✔240°
✔✔The term Surface Interval is defined as: - ✔✔The amount of time the diver stays out
of the water or on the surface between dives
✔✔Residual nitrogen is defined as: - ✔✔The amount of excessive nitrogen dissolved in
our blood stream and tissues after a dive
✔✔Rip currents are formed by: - ✔✔Water breaks over sand bars and reefs near the
beach and recedes through channels or cuts in the bars and reefs
✔✔The most important reason for planning your dives and executing the dive per your
plan is to: - ✔✔Prevent accidents
✔✔You should perform a safety stop at 15 feet for 3 to 5 minutes on every dive. -
✔✔True
✔✔A good diving buddy: - ✔✔Able to help all phases of diving and planning
Familiar with their buddy's diving equipment
Makes diving more fun
✔✔The recommended max ascent rate is: - ✔✔30 ft /min
✔✔If you lose contact with your buddy, you should: - ✔✔Search for no more than a
minute by turning 360 degrees and looking up and down and then perform a normal
ascent to the surface
QUESTIONS AND ANSWERS MARKED A+
✔✔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? - ✔✔40 cu ft
✔✔The transfer of oxygen and nitrogen into the bloodstream occurs through the walls of
the - ✔✔Alveoli
✔✔Decompression sickness occurs when - ✔✔Divers stay at depth too long and
surface too quickly
Excess nitrogen bubbles into the blood and tissue
Nitrogen tissue tolerance gradient exceeded
✔✔In air at 1 ata, the partial pressure of nitrogen is___, oxygen is_____ - ✔✔0.79/0.21
ata
✔✔The only accepted treatment for Arterial Gas Embolism is - ✔✔Stablize victim and
transport to nearest decompression chamber
✔✔The proper first aid for Arterial Gas embolism, Subcutaneous emphysema,
Pneumothorax, and Mediastinal Emphysema is: - ✔✔Administer oxygen
Seek proper medical aid
Watch vital signs, treat for shock and stand by to administer CPR
✔✔Dalton's Law can be paraphrased as: - ✔✔The total pressure of a mixture of gases
equals the sum of the partial pressures
✔✔Other symptoms of decompression sickness include - ✔✔Itchy skin
Numbness
Paralysis and loss of manual dexterity
✔✔Overexpansion injuries can be prevented by: - ✔✔Learning correct breathing
patterns
Never holding your breath
Dive with proper equipment
✔✔Which of the following would be inappropriate treatment for a diver exhibiting
symptoms of Decompression Sickness? - ✔✔Taking the victim back underwater
✔✔Diving at altitude or flying after diving - ✔✔Requires special diving computer
functions, altitude tables and/or refraining from flying from at least 24 hours after the
completion of a dive
, ✔✔he best prevention for decompression sickness is to - ✔✔Plan your dive and dive
your plan
✔✔Which of the following overexpansion injuries can be characterized by chest pain,
breathing difficulties, weakness, and cyanosis (blueness) of the lips and nail beds: -
✔✔Mediastinal Emphysema and Pneumothorax
✔✔The term gradient can be described as: - ✔✔The difference between the internal
partial pressure and the external partial pressure of a gas
✔✔The most serious lung overexpansion injury is - ✔✔Arterial Gas Embolism
✔✔Haldanes theory that the human body can withstand a 2:1 pressure difference was
revised by D Workman to a nitrogen ratio of: - ✔✔1.58:1
✔✔The reciprocal azimuth for an initial azimuth of 60º is: - ✔✔240°
✔✔The term Surface Interval is defined as: - ✔✔The amount of time the diver stays out
of the water or on the surface between dives
✔✔Residual nitrogen is defined as: - ✔✔The amount of excessive nitrogen dissolved in
our blood stream and tissues after a dive
✔✔Rip currents are formed by: - ✔✔Water breaks over sand bars and reefs near the
beach and recedes through channels or cuts in the bars and reefs
✔✔The most important reason for planning your dives and executing the dive per your
plan is to: - ✔✔Prevent accidents
✔✔You should perform a safety stop at 15 feet for 3 to 5 minutes on every dive. -
✔✔True
✔✔A good diving buddy: - ✔✔Able to help all phases of diving and planning
Familiar with their buddy's diving equipment
Makes diving more fun
✔✔The recommended max ascent rate is: - ✔✔30 ft /min
✔✔If you lose contact with your buddy, you should: - ✔✔Search for no more than a
minute by turning 360 degrees and looking up and down and then perform a normal
ascent to the surface
