SDI Divemaster Exam Questions and
Answers10
Equivalent Air Depth Calculation for Nitrox - ANSWERS-Metric: EAD = [(FN.79) x (D + 10)] -
10
Imperial: EAD = [(FN.79) x (D + 33)] - 33
Henry's Law - ANSWERS-At a constant temperature, the quantity of a gas which is dissolved in a
given type and volume of liquid is directly proportional to the partial pressure of that gas in
equilibrium with that liquid.
Concentration of dissolved gas = Henry's Law constant * Partial Pressure of the Gas
C = kP
Haldane's Model - ANSWERS-Model that delineates depth and time limits with associated
decompression schedules.
Half-time - ANSWERS-The time in minutes for a compartment to go halfway from its initial level
of dissolved nitrogen at a certain depth, to its ultimate level of dissolved nitrogen at a new
depth.
M-Value - ANSWERS-Maximum limits for excess nitrogen as a percentage above the normal
quantity of nitrogen present in a a saturated tissue at the surface.
Pulmonary System - ANSWERS-Directs blood flow from the right ventricle of heart to the lungs
where it is oxygenated and returns to left atrium
Oxygen - ANSWERS-Critical ingredient in body's metabolic processes and comprises 21% of air.
, Carbon Dioxide - ANSWERS-A by-product of metabolism and is potentially harmful to the body
in elevated levels.
Recreational
Commercial
Scientific
Military - ANSWERS-Categories of diving
Recreational Diving - ANSWERS-Hobby-type activity in which participation is based upon
personal enjoyment
Emile Gagnan and Jacques-Yves Cousteau - ANSWERS-Inventors of modern scuba
Scuba - ANSWERS-Self-contained underwater breathing apparatus
1943 - ANSWERS-Year scuba was invented
Los Angeles County - ANSWERS-First civilian diver training in the USA
Technical Diving - ANSWERS-Dives greater than the recreational limit of 130 FSW that require
special training and equipment. This may also include decompression diving, alternating
breathing gasses, or penetration into wrecks/caves.
Nitrox - ANSWERS-Nitrogen and oxygen mixture with higher percentage of oxygen than air.
Reduces the effects of nitrogen at depth.
Answers10
Equivalent Air Depth Calculation for Nitrox - ANSWERS-Metric: EAD = [(FN.79) x (D + 10)] -
10
Imperial: EAD = [(FN.79) x (D + 33)] - 33
Henry's Law - ANSWERS-At a constant temperature, the quantity of a gas which is dissolved in a
given type and volume of liquid is directly proportional to the partial pressure of that gas in
equilibrium with that liquid.
Concentration of dissolved gas = Henry's Law constant * Partial Pressure of the Gas
C = kP
Haldane's Model - ANSWERS-Model that delineates depth and time limits with associated
decompression schedules.
Half-time - ANSWERS-The time in minutes for a compartment to go halfway from its initial level
of dissolved nitrogen at a certain depth, to its ultimate level of dissolved nitrogen at a new
depth.
M-Value - ANSWERS-Maximum limits for excess nitrogen as a percentage above the normal
quantity of nitrogen present in a a saturated tissue at the surface.
Pulmonary System - ANSWERS-Directs blood flow from the right ventricle of heart to the lungs
where it is oxygenated and returns to left atrium
Oxygen - ANSWERS-Critical ingredient in body's metabolic processes and comprises 21% of air.
, Carbon Dioxide - ANSWERS-A by-product of metabolism and is potentially harmful to the body
in elevated levels.
Recreational
Commercial
Scientific
Military - ANSWERS-Categories of diving
Recreational Diving - ANSWERS-Hobby-type activity in which participation is based upon
personal enjoyment
Emile Gagnan and Jacques-Yves Cousteau - ANSWERS-Inventors of modern scuba
Scuba - ANSWERS-Self-contained underwater breathing apparatus
1943 - ANSWERS-Year scuba was invented
Los Angeles County - ANSWERS-First civilian diver training in the USA
Technical Diving - ANSWERS-Dives greater than the recreational limit of 130 FSW that require
special training and equipment. This may also include decompression diving, alternating
breathing gasses, or penetration into wrecks/caves.
Nitrox - ANSWERS-Nitrogen and oxygen mixture with higher percentage of oxygen than air.
Reduces the effects of nitrogen at depth.
