SCIENCE OF DIVING SSI 2026/2027 STUDY GUIDE –
ACCURATE QUESTIONS AND VERIFIED ANSWERS
RATED A+.
◎ When oxygen pressure in the body drops below a ppO2 of 0.17 bar, mild symptoms
of hypoxia occur. Blackout and death may occur if the ppO2 drops to:. ANSWER: - 0.10
bar
◎ A dive is defined as a decompression dive only if you exceed the:. ANSWER: - No-
decompression limits
◎ Tissue half-time is a method used to describe the time necessary to allow the
amount of gas in a particular tissue to change by:. ANSWER: - 50%
◎ The amount of a gas which dissolves in a liquid is proportional to:. ANSWER: - The
partial pressure of that gas
◎ According to the SSI Training Standards, diving at altitude is any dive:. ANSWER: -
Above 300 meters
◎ The most likely source of carbon monoxide in scuba cylinders is:. ANSWER: - All
answers are correct
◎ At sea level, human body tissues are saturated with nitrogen at a partial pressure
equal to:. ANSWER: - The partial pressure of the gas in alveolar air
◎ The term "fast tissue" refers to:. ANSWER: - The rate at which they absorb and
eliminate nitrogen
◎ The first acceptable scientific approach to decompression was performed by:.
ANSWER: - J.S. Haldane
◎ The recommended depth and time that a diver should spend at a safety stop on all
dives is:. ANSWER: - 5 meters / 3-5 minutes
◎ Part 5. ANSWER: - Part 5
◎ The most comfortable, convenient and enjoyable way to dive is:. ANSWER: - With
your own professionally-fitted Total Diving System
◎ Gases may separate out of solution to form bubbles which could lead to DCS if the
diver:. ANSWER: - Exceeds the ascent rate on rapid or uncontrolled ascents
ACCURATE QUESTIONS AND VERIFIED ANSWERS
RATED A+.
◎ When oxygen pressure in the body drops below a ppO2 of 0.17 bar, mild symptoms
of hypoxia occur. Blackout and death may occur if the ppO2 drops to:. ANSWER: - 0.10
bar
◎ A dive is defined as a decompression dive only if you exceed the:. ANSWER: - No-
decompression limits
◎ Tissue half-time is a method used to describe the time necessary to allow the
amount of gas in a particular tissue to change by:. ANSWER: - 50%
◎ The amount of a gas which dissolves in a liquid is proportional to:. ANSWER: - The
partial pressure of that gas
◎ According to the SSI Training Standards, diving at altitude is any dive:. ANSWER: -
Above 300 meters
◎ The most likely source of carbon monoxide in scuba cylinders is:. ANSWER: - All
answers are correct
◎ At sea level, human body tissues are saturated with nitrogen at a partial pressure
equal to:. ANSWER: - The partial pressure of the gas in alveolar air
◎ The term "fast tissue" refers to:. ANSWER: - The rate at which they absorb and
eliminate nitrogen
◎ The first acceptable scientific approach to decompression was performed by:.
ANSWER: - J.S. Haldane
◎ The recommended depth and time that a diver should spend at a safety stop on all
dives is:. ANSWER: - 5 meters / 3-5 minutes
◎ Part 5. ANSWER: - Part 5
◎ The most comfortable, convenient and enjoyable way to dive is:. ANSWER: - With
your own professionally-fitted Total Diving System
◎ Gases may separate out of solution to form bubbles which could lead to DCS if the
diver:. ANSWER: - Exceeds the ascent rate on rapid or uncontrolled ascents
