IANTD Open Water Diver || A+ Certified.
What is the most important thing to look for in a mask correct answers Fit, ability to pinch nose,
tempered glass
Name two ways to optically correct a mask correct answers Contact Lenses, change mask lenses
Name the two types of fins normally found on the market. correct answers Full foot, open heel
What are the two kicks normally used with the fins? correct answers Flutter kick and mermaid
kick
Why should a snorkel not be over 18"? correct answers You won't be able to clear C02
What are two ways to inflate a B.C.? correct answers Power inflate, orally inflate
How is it preferred a B.C. should float you in an emergency? correct answers Head up
How does a wetsuit keep you warm? correct answers Traps a thin layer of water between your
skin and the suit.
What happens to a diver wearing a wetsuit as they ascend? correct answers Buoyancy will
increase
What are the two main materials tanks are made of? correct answers Steel and aluminum
In the tank marking CTC/DOT 3AA 2250 what does the 3AA stand for? correct answers 3AA
Stands for steel
In the tank marking CTC/DOT 3AL 3000 what does the 3000 stand for? correct answers 3000
PSI
In the tank marking 9X94+ what does the plus stand for? correct answers You can overfill the
tank by 10%
How often should a tank hydro test be performed? correct answers Every 5 years
How often should a visual tank inspection be performed? correct answers Once a year
What is a K valve? correct answers A simple on/off valve
What is a J valve? correct answers A valve with a built in reserve switch
Name the two types of activating mechanisms in our regulator. correct answers Piston or
diaphram
, What kind of regulators do recreational divers use? correct answers demand regulators
How often should a regulator be professionally serviced? correct answers Once a year
List the 3 main gasses in air and their percentage correct answers A. Oxygen 20% B. Nitrogen
79% C. Carbon Dioxide .03%
What is the gas we do not want in our air supply and why? correct answers Carbon monoxide,
carbon monoxide poisoning
Which gas in air can you smell and under what condition can you smell it? correct answers
What is atmospheric pressure? correct answers The weight of the air surrounding the earth
What depth is one atmosphere of water correct answers 33 Feet
What depth is 3 atmospheres absolute correct answers 66 Feet
What does the submersible (underwater) pressure guage tell you? correct answers The
submersible pressure gauge indicates exactly how much air you have at a given time
What is boyles law? correct answers Increase in pressure leads to decrease in volume
How long will and 80 cu ft tank last at 66' breathing .5 cu ft per minute? correct answers
What does Charles law explain in relation to your air fills? correct answers
What is Henry's law? correct answers Breathing gas at a higher pressure will cause your body to
absorb more gases than at a lower pressure
Will objects look larger or smaller underwater? correct answers Objects will look larger
underwater
What happens to color as you descend on a dive? correct answers The light will be absorbed by
ROYGBIV
Why are you colder in water than air at the same temperature? correct answers
Does sound traver faster in water or air? correct answers Sound travels faster in water
How can you tell if a boat is coming towards you or away from you when you are underwater?
correct answers
How long will a 50 cu ft tank last at a depth of 72' breathing 1 cu ft per minute? correct answers
What problems does nitrogen cause in diving? correct answers
What is the most important thing to look for in a mask correct answers Fit, ability to pinch nose,
tempered glass
Name two ways to optically correct a mask correct answers Contact Lenses, change mask lenses
Name the two types of fins normally found on the market. correct answers Full foot, open heel
What are the two kicks normally used with the fins? correct answers Flutter kick and mermaid
kick
Why should a snorkel not be over 18"? correct answers You won't be able to clear C02
What are two ways to inflate a B.C.? correct answers Power inflate, orally inflate
How is it preferred a B.C. should float you in an emergency? correct answers Head up
How does a wetsuit keep you warm? correct answers Traps a thin layer of water between your
skin and the suit.
What happens to a diver wearing a wetsuit as they ascend? correct answers Buoyancy will
increase
What are the two main materials tanks are made of? correct answers Steel and aluminum
In the tank marking CTC/DOT 3AA 2250 what does the 3AA stand for? correct answers 3AA
Stands for steel
In the tank marking CTC/DOT 3AL 3000 what does the 3000 stand for? correct answers 3000
PSI
In the tank marking 9X94+ what does the plus stand for? correct answers You can overfill the
tank by 10%
How often should a tank hydro test be performed? correct answers Every 5 years
How often should a visual tank inspection be performed? correct answers Once a year
What is a K valve? correct answers A simple on/off valve
What is a J valve? correct answers A valve with a built in reserve switch
Name the two types of activating mechanisms in our regulator. correct answers Piston or
diaphram
, What kind of regulators do recreational divers use? correct answers demand regulators
How often should a regulator be professionally serviced? correct answers Once a year
List the 3 main gasses in air and their percentage correct answers A. Oxygen 20% B. Nitrogen
79% C. Carbon Dioxide .03%
What is the gas we do not want in our air supply and why? correct answers Carbon monoxide,
carbon monoxide poisoning
Which gas in air can you smell and under what condition can you smell it? correct answers
What is atmospheric pressure? correct answers The weight of the air surrounding the earth
What depth is one atmosphere of water correct answers 33 Feet
What depth is 3 atmospheres absolute correct answers 66 Feet
What does the submersible (underwater) pressure guage tell you? correct answers The
submersible pressure gauge indicates exactly how much air you have at a given time
What is boyles law? correct answers Increase in pressure leads to decrease in volume
How long will and 80 cu ft tank last at 66' breathing .5 cu ft per minute? correct answers
What does Charles law explain in relation to your air fills? correct answers
What is Henry's law? correct answers Breathing gas at a higher pressure will cause your body to
absorb more gases than at a lower pressure
Will objects look larger or smaller underwater? correct answers Objects will look larger
underwater
What happens to color as you descend on a dive? correct answers The light will be absorbed by
ROYGBIV
Why are you colder in water than air at the same temperature? correct answers
Does sound traver faster in water or air? correct answers Sound travels faster in water
How can you tell if a boat is coming towards you or away from you when you are underwater?
correct answers
How long will a 50 cu ft tank last at a depth of 72' breathing 1 cu ft per minute? correct answers
What problems does nitrogen cause in diving? correct answers
