The PADI Open Water Course 

Open Water Exam - Dive tables

Lesson 153

Openwater dive tables exam

Imperial Table Exam - 10 Questions ( no time limit)

1. I dive to 59 feet for 22 minutes. After a 30 minute surface interval, I plan to dive to 50 feet. What is the maximum allowable time for the second dive?

A. 10 minutes
B. 61 minutes 
C. 55 minutes
D. 19 minutes

 
2. I am planning to make two dives. The first dive is to 60 feet for 45 minutes, and the second dive is to 60 feet for 35 minutes. How long would I have to stay on the surface (minimum surface interval) to do these two dives safely?

A. 26 minutes
B. 1 hour and 4 minutes 
C. hour and 10 minutes
D. 1 hour and 14 minutes

 
3. I dive to 56 feet for 47 minutes. After a 30 minute surface interval I do a second dive to 56 feet. 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 15 feet 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 15 feet and stay there for 3 minutes before going to the surface.
D. Ascend (go up) to 10 feet 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 90 feet of water for 20 minutes. The group then remains on the surface for 1 hour. The second dive is on a wreck in 60 feet of water, with a planned bottom time of 30 minutes. What will be the ending pressure group after the second dive?

A. L
B. S 
C. U
D. W

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 60 feet for 30 minutes. What dive profile would we use when planning our dive?

A. 70 feet for 40 minutes
B. 70 feet for 30 minutes 
C. 60 feet for 40 minutes
D. 60 feet for 30 minutes

6. I am an Advanced Open Water Diver. I plan to do three dives. The first dive is an 80 foot dive for 20 minutes followed by a 42 minute surface interval. The second dive is to 50 feet for 37 minutes followed by a surface interval of one hour. My third dive is to 50 feet. What would be my maximum allowable bottom time for this third dive?

A. 54 minutes 
B. 26 minutes
C. 15 minutes
D. 63 minutes

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

A. make a safety stop at 15 feet 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 1000 feet, 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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