Open Water Dive PADI Exam Questions With In-Depth
Solutions.
How often should a cylinder undergo hydrostatic testing? - accurate answers-
Every 5 years
How should tanks be stored? - accurate answers-With pressure in them to
keep the water out
How deep can a person dive after open water certification? - accurate
answers-60 ft
How many feet is 1 atmosphere? - accurate answers-33 ft (10 meters)
1 bar/1 atmosphere
What happens to gas volume as you go deeper? - accurate answers-Gas
volume decreases and density increases
How does air volume relate to atmospheric pressure? - accurate answers-If
you go from the surface to 33 feet you double the pressure to 2 bar/ata (air
plus 1 water)
If you go 20 meters/66 feet, what is the bar/ata and how does it relate to the
air volume and density? - accurate answers-The pressure is 3 bar/ata. Air
volume is 1/3 the surface volume and density triples
You start your descent with a balloon filled with 3 liters of air. At 10
meters/33 feet, what is the volume and density? - accurate answers-Volume is
1.5 liters. Density doubles
You have 1 liter of air at 30 meters/99 feet. What would the volume and
density be at the surface? - accurate answers-The pressure at 99 feet is 4
bar/ata. The pressure at the surface is 1 bar/ata so the pressure is 1/4 the
pressure at 99 feet. One liter of air brought to the surface from 99 feet will
expand to 4 liters at the surface. The air density will 1/4 the density at 99 feet
What would happen to a balloon fully inflated at 33 feet during during ascent
to the surface? - accurate answers-It would burst
, How do you equalize your mask on descent? - accurate answers-Blow air
through your nose
A squeeze is caused by - accurate answers-A pressure imbalance between the
surrounding pressure and an air space
Equalization is the process of - accurate answers-Adding air to an air space
How should you breathe when ascending? - accurate answers-Breathe
normally. You release expanding air with each exhalation
What should you do when the regulator is not in your mouth? - accurate
answers-Blow bubbles to keep from holding your breath
What is a reverse block or reverse squeeze? - accurate answers-When
expanding air becomes trapped in a body air space. Can occur when
decongestants wear off under water (occurs during ascent)
What is the most important scuba rule? - accurate answers-Never hold your
breath
During ascent I feel discomfort in my ears. I should - accurate answers-Stop,
descend slightly and allow trapped air to work it's way out
How is air supply proportionate to depth? - accurate answers-Because scuba
provides air at the surrounding pressure, as you go deeper, each breath takes
more air. The deeper you are, the faster you use air
How fast do you use your air at 33 feet compared to the surface? - accurate
answers-Twice as fast
How is energy related to depth? - accurate answers-Denser air is harder to
breathe so the deeper you are the more energy you use to breathe
Define buoyancy - accurate answers-An upward force caused by displaced
water
What is positive buoyancy? - accurate answers-When an object weighs less
than the water it displaces, it floats
Solutions.
How often should a cylinder undergo hydrostatic testing? - accurate answers-
Every 5 years
How should tanks be stored? - accurate answers-With pressure in them to
keep the water out
How deep can a person dive after open water certification? - accurate
answers-60 ft
How many feet is 1 atmosphere? - accurate answers-33 ft (10 meters)
1 bar/1 atmosphere
What happens to gas volume as you go deeper? - accurate answers-Gas
volume decreases and density increases
How does air volume relate to atmospheric pressure? - accurate answers-If
you go from the surface to 33 feet you double the pressure to 2 bar/ata (air
plus 1 water)
If you go 20 meters/66 feet, what is the bar/ata and how does it relate to the
air volume and density? - accurate answers-The pressure is 3 bar/ata. Air
volume is 1/3 the surface volume and density triples
You start your descent with a balloon filled with 3 liters of air. At 10
meters/33 feet, what is the volume and density? - accurate answers-Volume is
1.5 liters. Density doubles
You have 1 liter of air at 30 meters/99 feet. What would the volume and
density be at the surface? - accurate answers-The pressure at 99 feet is 4
bar/ata. The pressure at the surface is 1 bar/ata so the pressure is 1/4 the
pressure at 99 feet. One liter of air brought to the surface from 99 feet will
expand to 4 liters at the surface. The air density will 1/4 the density at 99 feet
What would happen to a balloon fully inflated at 33 feet during during ascent
to the surface? - accurate answers-It would burst
, How do you equalize your mask on descent? - accurate answers-Blow air
through your nose
A squeeze is caused by - accurate answers-A pressure imbalance between the
surrounding pressure and an air space
Equalization is the process of - accurate answers-Adding air to an air space
How should you breathe when ascending? - accurate answers-Breathe
normally. You release expanding air with each exhalation
What should you do when the regulator is not in your mouth? - accurate
answers-Blow bubbles to keep from holding your breath
What is a reverse block or reverse squeeze? - accurate answers-When
expanding air becomes trapped in a body air space. Can occur when
decongestants wear off under water (occurs during ascent)
What is the most important scuba rule? - accurate answers-Never hold your
breath
During ascent I feel discomfort in my ears. I should - accurate answers-Stop,
descend slightly and allow trapped air to work it's way out
How is air supply proportionate to depth? - accurate answers-Because scuba
provides air at the surrounding pressure, as you go deeper, each breath takes
more air. The deeper you are, the faster you use air
How fast do you use your air at 33 feet compared to the surface? - accurate
answers-Twice as fast
How is energy related to depth? - accurate answers-Denser air is harder to
breathe so the deeper you are the more energy you use to breathe
Define buoyancy - accurate answers-An upward force caused by displaced
water
What is positive buoyancy? - accurate answers-When an object weighs less
than the water it displaces, it floats
