Open Water Final Exam Version A Metric

Directions: Choose the best answer from the choices provided.

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.

2. 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).
C. The balloon will get bigger and the air inside the balloon will be denser.
D. The balloon will get smaller and the air inside the balloon will be less dense.

3. 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.

4. If I am not able to equalize (clear) my body air spaces, it may be because I have:
A. Seasickness.
B. Heart disease and high blood pressure.
C. A cold, allergy or another medical problem.
D. Anxiety.

5. If my ears or sinuses hurt while I am descending (going down), it usually means:

A. My air spaces are equalized.
B. My mask strap is too tight.
C. I am feeling a squeeze and need to clear.
D. My mask is too small.

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 6. 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.

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.

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/66 feet breathing normally?
A. 60 minutes
B. 20 minutes
C. 15 minutes
D. 12 minutes

9. How often should I take my scuba cylinder to be visually inspected by my dive center?
A. Once a year.
B. Once every two years.
C. Every six months.
D. Every five years.

10. 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.

11. Which of the following is part of proper care for my scuba cylinder?
A. Sand and repaint it every year.
B. Dry it in the sun.
C. Keep some air in it.
D. Have it pressure tested every month.

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 12. Look at the regulator picture. Each regulator part has a number next to it. Write the number of
the part next to its name.
A. _____ Regulator first stage
B. _____ Low pressure inflator hose for the BCD
C. _____ Instrument console/computer
D. _____ Alternate air source
E. _____ Regulator second stage

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
C. smaller and/or further away
D. smaller and/or nearer

14. __________ travels faster in water than it does in air. This is why you cannot easily tell where it
comes from.
A. Light
B. Current
C. Aquatic life
D. Sound

15. Unless there are laws that say differently, I should stay within ____ of my dive flag.
A. 60 meters
B. 30 meters
C. 15 meters
D. 5 meters

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 16. If I work too hard and find it difficult to breathe underwater, I should:
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).

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.

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

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.

Hand signals: Choose the best answer for each signal shown from the choices
provided.

19.
A. Stop, hold it, stay there.
B. Go back.
C. Please be quiet.
D. Go up.

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 20.
A. Which is the right way?
B. Something is wrong.
C. Go up and down.
D. Everything is okay.

21.
A. My finger is cold.
B. Go around the rock.
C. Okay? Okay.
D. Stay together.

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 22.
A. Wave to friends on the beach.
B. I need more weight.
C. Distress, help.
D. I need the boat to pick me up.

23.
A. Okay? Okay. (on surface at distance)
B. I have cramps in my legs.
C. I would like to snorkel in.
D. Boat pick up, I have air.

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 24.
A. Which way to the boat?
B. Stay at this depth.
C. Go this way.
D. Out of air.

25.
A. Look at me.
B. Low on air.
C. Share air.
D. Go up.

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 26.
A. Turn the dive.
B. Share air.
C. I am thirsty.
D. I have lost my mouthpiece.

27. If I were separated from my buddy the general procedure is to:

A. Go up immediately, wait a minute and then go back down.
B. Search for a minute and then go up to reunite with my buddy at the surface.
C. Go to the surface immediately and get out of the water.
D. Look for my buddy's bubbles and follow the bubbles to find my buddy.

28. I am most likely to become confused about which way is up or down:

A. At the surface.
B. Near the surface.
C. On the bottom.
D. In mid-water.

29. I feel a mild current at the start of my dive. How should I begin this dive?
A. Dive with the current.
B. Dive across the current.
C. Dive against or into the current.
D. Dive at an angle to the current.

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 30. What the bottom is made of can cause big changes in:
A. Visibility (how far you can see underwater).
B. Temperature (how warm the water is).
C. Current (the movement of water).
D. Buoyancy (whether you sink or float).

31. Most injuries caused by aquatic animals happen because the animals are:
A. Hungry.
B. Curious.
C. Injured.
D. Trying to defend themselves.

32. A diver at the surface is moving quickly and jerkily, has the mask off the face, the
regulator/snorkel is out of the mouth, and the diver does not respond to directions. The diver is:
A. Giving the okay signal.
B. Performing a pre-dive safety check.
C. Excited about the dive.
D. Showing signs of distress (trouble).

33. 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.

34. If my regulator begins to free flow (release air continuously) while underwater, I should:
A. Make a controlled emergency swimming ascent.
B. Do nothing special.
C. Hold the regulator without sealing my mouth around the mouthpiece and "sip" the air I
need as I ascend (go up).
D. Make a buoyant emergency ascent.

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 35. If I were very low on air and about to run out, what would I do?

Please match the recommended action with the situation using Numbers 1-4.
A. _____ Buoyant emergency ascent dropping my weight system
B. _____ Controlled emergency swimming ascent (CESA)- swimming up to the surface
making a continuous sound (like ah-h-h-h)
C. _____ Normal ascent- going up normally
D. _____ Alternate air source ascent - using my buddy's alternate air source
Situation
1. When I am low on air and not out of air.
2. When my buddy is too far away and I'm deeper than 9 meters.
3. When my buddy is near.
4. When my buddy is too far away.

36. There is an injured diver who is out of the water and is not responding to touch or my voice.
The first thing to do would be:
A. To keep the diver warm.
B. To decide what happened.
C. To provide oxygen.
D. To check if the diver is breathing.

37. I should have cylinders filled at a dive center I trust, not use air that tastes or smells bad, nor
use air from a compressor designed to fill car tires. This is important to:
A. Decrease the likelihood of gas narcosis.
B. Increase the enjoyment of my dive.
C. Reduce the risk of lung overexpansion injuries.
D. Reduce the risk of breathing contaminated air.

38. Divers who act foolishly at depth due to gas narcosis may start acting normally again if they:
A. Ascend (go up) to a shallower depth.
B. Breathe slowly and deeply.
C. Signal their buddy for help.
D. Dive within no stop limits.

39. I am likely to increase the risk of decompression sickness (DCS) if I:

A. Dive in poor visibility, strong moving water, and rough seas.
B. Dive while tired, cold, sick, thirsty or injured.
C. Do not look after my equipment.
D. Am using a dive computer.

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 40. If I think I have decompression sickness I should:
A. Stop diving until I feel better.
B. Go back in the water.
C. Breathe 100 percent oxygen and contact emergency medical care.
D. See a doctor when I can.

41. The first step in using my dive computer is:

A. Setting the time and date.
B. Reading the manufacturer's instructions.
C. Calibrating it for enriched air nitrox.
D. Setting it for fresh or salt water.

42. When planning a dive with a computer, I use the "plan" or "no stop scroll'' mode to determine:
A. The maximum depth of the previous dive.
B. The maximum allowable time limits for depths (typically in 3-meter / 10-foot
increments).
C. Whether my computer is compatible with my buddy's computer.
D. The best settings for my backup computer.

43. When making computer assisted dives:

A. Each diver needs a personal computer.
B. Each buddy team needs a computer.
C. Up to four divers may share a computer.
D. All divers may follow the dive guide's computer.

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.

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.

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 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.
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.

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.

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

49. As a new PAD! Open Water Diver, the recommended maximum depth is _____, or the actual
depth I reached in training, if shallower. The maximum depth for all recreational scuba divers,
even experienced divers, is:
A. 10 meters / 18 meters
B. 12 meters / 30 meters
C. 18 meters / 40 meters
D. 24 meters / 58 meters

50. When diving at an altitude above 300 meters:

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.

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Directions: Use the Metric RDP Table to answer the following questions.
1. I dive to 17 meters for 23 minutes. After a 30 minute surface interval, I plan to dive to 16
meters. What is the maximum allowable time for the second dive?
A. 10 minutes
B. 53 minutes
C. 22 minutes
D. 19 minutes

2. I am planning to make two dives. The first dive is to 18 meters for 49 minutes, and 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?
A. 26 minutes
B. 32 minutes
C. 54 minutes
D. 59 minutes

3. I dive to 17 meters for 47 minutes. After a 30 minute surface interval! 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?
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.

4. A group of Advanced Open Water Divers plans to make two dives. The first dive is on a reef in 22
meters of water for 20 minutes. The group then remains on the surface for 1 hour. The second
dive is on a wreck in 16 meters of water, with a planned bottom time of 30 minutes. What will
be the ending pressure group after the second dive?
A. L
B. P
C. S
D. T

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 5. My buddy and I are planning to dive at a site where the water and air temperature are near
freezing. We plan to dive to 18 meters for 30 minutes. What dive profile would we use when
planning our dive?
A. 22 meters for 40 minutes
B. 22 meters for 30 minutes
C. 20 meters for 30 minutes
D. 18 meters for 30 minutes

6. I am an Advanced Open Water Diver. I plan to do three dives. The first dive is a 25 meter dive for
20 minutes followed by a 45 minute surface interval. The second dive is to 16 meters for 37
minutes followed by a surface interval of 62 minutes. My third dive is to 16 meters. What would
be my maximum allowable bottom time for this third dive?
A. 47 minutes
B. 51 minutes
C. 25 minutes
D. 4 minutes

7. To reduce the risk of decompression sickness (DCS):

A. Make a safety stop at 5 meters at the end of each dive.
B. Ascend (go up) to a shallower depth if feeling dizzy.
C. Have my cylinder filled only at a dive center I trust.
D. Breathe more slowly than normal.

8. I make two dives in one day and I am flying home on a commercial plane. What is the minimum
time recommended that I should wait before I go on the plane?
A. I do not have to wait.
B. 48 hours
C. 24 hours
D. 18 hours

9. When diving in the mountains at places higher than 300 meters, I:

A. Must double all emergency decompression stops.
B. Can’t use a wet suit.
C. Need to use special tables and procedures (rules).
D. Can’t use air in my cylinders.

10. When I am diving with a computer, I should:

A. Make sure my dive buddy has the same model computer.
B. Follow the least conservative computer.
C. Stay within the limits of at least one computer.
D. Stay well within the computer limits.

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