PADI Open Water Diver Exam
Questions And Answers
1. What is the most important rule of scuba diving?
Answer> Do not hold your breath Breathe continuously
2. What are the consequences of breaking the most important rule in scuba
diving?
Answer> Lung over expansion
severe injuries, death
3. What is a reverse block?
Answer> pain and discomfort caused by expanding air trapped inside an air space
during ascent
4. What should you do if you feel discomfort during ascent due to air expan-
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,sion in the ears, sinuses, stomach, intestines, or teeth?
Answer> slow or stop ascent descend a metre/few feet and give the trapped air
time to work its way out
5. How does increasing depth affect how long your air supply lasts?
Answer> the deeper you descend, the denser the air becomes.
It takes 4X the effort to breathe twice as fast
6. What's the most efficient way to breathe dense air underwater?
Answer> take deep, slow breaths
7. Why does a diver need a mask?
Answer> creates an air space, so your eyes can focus
8. As you go deeper, you consume air from your scuba cylinder
Answer> faster
9. Why does the mask need to enclose your nose?
Answer> to equalize during your descent to prevent mask squeeze
10. What 6 features should you look for in a mask?
Answer> 1) tempered glass
2) comfortable skirt with a good seal
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, 3) nose or finger pockets
4) low profile
5) Adjustable strap that can be locked in place
6) wide field of vision
11. When buying a mask, what are the 2 most important features?
Answer> fit and comfort
12. How do you prepare a new mask for use?
Answer> use a soft cloth with a low abrasion cleaner to remove the protective
chemical
adjust the strap
13. What 3 general maintenance procedures apply to mask care?
Answer> 1) rinse thoroughly with fresh H2o
2) keep out of direct sunlight
3) store in a cool, dry place
14. Why does a diver need a snorkel?
Answer> 1) lets you rest or swim with your face in the water, without wasting
cylinder air
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Questions And Answers
1. What is the most important rule of scuba diving?
Answer> Do not hold your breath Breathe continuously
2. What are the consequences of breaking the most important rule in scuba
diving?
Answer> Lung over expansion
severe injuries, death
3. What is a reverse block?
Answer> pain and discomfort caused by expanding air trapped inside an air space
during ascent
4. What should you do if you feel discomfort during ascent due to air expan-
1/
21
,sion in the ears, sinuses, stomach, intestines, or teeth?
Answer> slow or stop ascent descend a metre/few feet and give the trapped air
time to work its way out
5. How does increasing depth affect how long your air supply lasts?
Answer> the deeper you descend, the denser the air becomes.
It takes 4X the effort to breathe twice as fast
6. What's the most efficient way to breathe dense air underwater?
Answer> take deep, slow breaths
7. Why does a diver need a mask?
Answer> creates an air space, so your eyes can focus
8. As you go deeper, you consume air from your scuba cylinder
Answer> faster
9. Why does the mask need to enclose your nose?
Answer> to equalize during your descent to prevent mask squeeze
10. What 6 features should you look for in a mask?
Answer> 1) tempered glass
2) comfortable skirt with a good seal
2/
21
, 3) nose or finger pockets
4) low profile
5) Adjustable strap that can be locked in place
6) wide field of vision
11. When buying a mask, what are the 2 most important features?
Answer> fit and comfort
12. How do you prepare a new mask for use?
Answer> use a soft cloth with a low abrasion cleaner to remove the protective
chemical
adjust the strap
13. What 3 general maintenance procedures apply to mask care?
Answer> 1) rinse thoroughly with fresh H2o
2) keep out of direct sunlight
3) store in a cool, dry place
14. Why does a diver need a snorkel?
Answer> 1) lets you rest or swim with your face in the water, without wasting
cylinder air
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21
