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- 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 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 2) makes it easier to breathe when the surface is rough 3) makes it easier to swim back, when you are running low on air 15. What 3 features does an easy-breathing snorkel have? Answer 1) large diameter (bore) 2) Not excessively long 3) Designed with smooth, rounded bends 16. How do you prepare a snorkel for use? Answer 1) attach it to the left of your mask 2) Adjust snorkel keeper, so the top of the snorkel sits at the crown of your head with the mouthpiece in place 3) remains in your mouth with a relaxed jaw 17. Why does a diver need fins? Answer provide a large surface area, so leg muscles can move through the water 18. What are the 2 basic fin styles? Answer 1) adjustable strap - open heel 2) full-foot 19. What blade design features may