PADI, Open Water Diver, Final Exam Review Latest 2024-2025. Questions and Correct Answers, Exams of Water and Wastewater Engineering

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PADI, Open Water Diver, Final Exam Review Latest

2024-2025. Questions and Correct Verified

Answers. Graded A

1. If an object is neutrally buoyant (does not sink or float) in fresh water, the same object placed into salt water would A sink. B either sink or float. C do nothing. D float. - ANSD
2. The difference between DIN valves and yoke valves is that DIN valves A are made from durable plastic. B contain a spring-operated shutoff valve that is held open by cylinder pressure. C have an o-ring in them. D have threaded openings to screw the regulator into. - ANSD
3. Which of the following is part of proper care for my scuba cylinder? A Sand and repaint it every year.

[Date] B Dry it in the sun. C Keep some air in it. D Have it pressure tested every month. - ANSC

12. Refer to the regulator picture. Each regulator part has a number next to it. Please choose the correct number for the choices below. regulator first stage, regulator second stage alternate air source second stage low pressure inflator hose for the BCD instrument console/gauges/computer - ANS1. regulator first stage, 2. regulator second stage, 3. alternate air source second stage, 4. instrument console/gauges/computer, 5. low pressure inflator hose for the BCD
13. When I look at things underwater they often seem ___________ than they look on the surface. A larger and/or nearer B larger and/or further away

[Date] A inflate my BCD. B stop all activity and rest, holding onto something for support if possible. C swim immediately to my buddy and signal for help. D do a controlled emergency swimming ascent (CESA - swimming up to the surface saying the ah-h-h-h sound). - ANSB

17. As I descend (go down), my wet suit will A compress (feel thinner) from water pressure, and I will lose buoyancy and warmth. B expand (feel thicker) from water pressure, and I will gain buoyancy and warmth. C remain the same thickness from the water pressure, and there will be no change in warmth. D expand (feel thicker) from water pressure, and I will lose buoyancy and warmth.

• ANSA

18. I know I am properly weighted for diving if I

[Date] A float at neck level with my BCD about half full while I am holding a normal breath of air. B sink slowly holding a normal breath of air and with an empty BCD. C float at eye level while holding a normal breath of air and with an empty BCD. D sink easily with a partially filled BCD. - ANSC

19. Choose the best answer for the signal shown from the choices provided. A Stop, hold it, stay there. B Go back. C Please be quiet. D Go up. - ANSA
20. I blow up a balloon, tie it off, and take it to the bottom of the swimming pool. What will happen to the balloon and the air inside it? A The balloon will get bigger and the air inside the balloon will be less dense (molecules move further apart). B The balloon will get smaller and the air inside the balloon will be more dense (molecules move closer together).

[Date] A Wave to friends on the beach. B I need more weight. C Distress, help. D I need the boat to pick me up. - ANSC

23. Choose the best answer for the signal shown from the choices provided. A Okay? Okay. (on the surface at a distance) B I have cramps in my legs. C I would like to snorkel in. D Boat pick up, I have air. - ANSA
24. Choose the best answer for the signal shown from the choices provided. A Which way to the boat? B Stay at this depth. C Go this way. D Out of air. - ANSD

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25. Choose the best answer for the signal shown from the choices provided. A Look at me. B Low on air. C Share air. D Go up. - ANSB
26. I turn a glass upside down, trap the air in it by putting it in water, and then I take the glass down to 10 meters. The air space would A become half the size it was at the surface. B not change in size. C become 1/3 the size it was at the surface. D become 2/3 the size it was at the surface. - ANSA
27. If I am not able to equalize (clear) my body air spaces, it may be because I have A seasickness.

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44. It's important that I do not turn off a dive computer between dives because A the divemaster may object because I can't recall the dive information for logging. B it would lose memory of the previous dive and not calculate repetitive dives correctly. C it won't come back on, or it may take a long time to power up. D doing so is hard on the batteries and may cause the computer to fail. - ANSB
45. If I accidentally exceed my computer's no stop limits, I should A make a safety stop for three minutes at 5 meters. B follow the computer's instructions for decompression. C surface immediately, breathe oxygen and report my condition to the divemaster. D make a controlled ascent and refer to the manufacturer's literature for decompression procedures. - ANSB
46. If I'm diving in cold water or under strenuous conditions A I should add an extra safety margin and stay well within my computer's limits.

[Date] B nitrogen absorption will be slower so I can stay longer. C my dive computer will probably not work at all. D I do not need to do anything special. - ANSA

47. If my computer fails during a dive, I can use my backup computer to continue the dive. If I'm not wearing a backup, I should A ascend (go up), make a safety stop and end the dive. B borrow my buddy's backup. C continue the dive until low on air, but make no repetitive dives. D end the dive and surface immediately. - ANSA
48. I make two dives in one day and am flying home on a commercial plane. I should wait until my computer says I can fly or ________ hours, whichever is longer. A 0 B 48 C 24 D 18. - ANSD

[Date] A I do not need to follow special procedures. B I can't use my dive computer. C I do not need to follow special procedures, but my computer may need to be set for the altitude. D I need to follow special procedures and may need to set my computer for the altitude. - ANSD

51. I dive to 18 meters for 33 minutes. After a 30-minute surface interval, I plan to dive to 17 meters. What is the maximum allowable time for the second dive? A 21 minutes B 32 minutes C 23 minutes D 19 minutes - ANSB
52. I am planning to make two dives. The first dive is to 18 meters for 49 minutes. The second dive is to 18 meters for 24 minutes. How long would I have to stay on the surface (minimum surface interval) to do these two dives safely?

[Date] A 26 minutes B 32 minutes C 54 minutes D 59 minutes - ANSB

53. I dive to 17 meters for 47 minutes. After a 30-minute surface interval, I do a second dive to 17 meters. Losing track of time, I notice my bottom time is now 25 minutes. According to the General Rules, what should I do? Note: you may have to scroll down to see the whole question or to submit your answer. A Ascend (go up) right away to 5 meters and stay there for at least 8 minutes before going to the surface, and not dive for six hours. B Go to the surface right away and contact the nearest recompression chamber. C Ascend (go up) right away to 5 meters and stay there for 3 minutes before going to the surface. D Ascend (go up) to 3 meters and stay there until I use up my air, and not dive for 24 hours. - ANSA

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56. I am an Advanced Open Water Diver. I plan to do three dives. The first dive is a 25-meter dive for 22 minutes followed by a 52-minute surface interval. The second dive is to 20 meters for 27 minutes followed by a surface interval of 62 minutes. My third dive is to 18 meters. What would be my maximum allowable bottom time for this third dive? A 21 minutes B 54 minutes C 34 minutes D 25 minutes - ANSC
57. The best place for me to position an alternate air source is A loose by my side so I can find it fast. B in the triangle area formed by my chin and the lower corners of my rib cage. C to the base of my cylinder. D to the back of my BCD between my shoulder blades and waist. - ANSB

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7. Lung overexpansion injuries can be caused by A scuba diving without a buddy. B continuing a dive when not properly weighted. C not drinking enough water before scuba diving. D holding my breath while scuba diving. - ANSD
8. If my cylinder of air lasts 60 minutes while I am at the surface breathing normally, assuming all else is the same, how long will it last at 20 meters breathing normally? A 60 minutes B 20 minutes C 15 minutes D 12 minutes - ANSB
9. How often should I take my scuba cylinder to be visually inspected by my dive center? A Once a year.

[Date] You can make a normal ascent when very low on air, but your cylinder isn't completely empty. When out of air, your best option is usually to make an alternate air source ascent using your buddy's alternate air source. Make a controlled emergency swimming ascent when fairly shallow and the surface is closer than a buddy with an alternate air source. Make a buoyant emergency ascent when your buddy is not near and you're deep enough that you don't think you can make it to the surface by just swimming. See Being a Diver III - Underwater Problem Management. - ANS35) Although it shouldn't have happened, on a dive I fail to watch my SPG and run out of air. If my buddy is close by, my best option is to __________. Another option is to _____________, if I'm in shallow water and the surface is closer than my buddy. Note: you may have to scroll down to see the whole question or to submit your answer. A ascend using my buddy's alternate air source / make a controlled emergency swimming ascent B ascend using my buddy's alternate air source / make an buoyant emergency ascent C make a normal ascent / ascend using my buddy's alternate air source D make a controlled emergency swimming ascent / make a normal ascent

[Date] A Switch to my buddy's alternate air source. When out of air, your best option is usually to make an alternate air source ascent using your buddy's alternate air source. See Being a Diver III - Underwater Problem Management. - ANS33) I am close to my buddy and realize I am out of air. The best response is to A switch to my buddy's alternate air source. B make a controlled emergency swimming ascent (swim up to the surface making a continuous sound, like ah-h-h-h). C make a buoyant emergency ascent (dropping my weight system). D switch to my buddy's alternate air source and continue the dive. A To check if the diver is breathing. Your priority when assisting someone who is unresponsive is to make sure the diver is breathing. Provide rescue breaths as necessary. Contact emergency medical care.