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1. What is the recommended minimum visibility for a safe open water dive?
A) 10 feet (3 meters)
B) 20 feet (6 meters)
C) 30 feet (9 meters)
D) Visibility is not a safety factor
Answer: B) 20 feet (6 meters)
Rationale: Visibility of at least 20 feet (6 meters) is generally recommended for
safe diving to ensure adequate orientation and communication underwater.
2. How often should you check your air supply during a dive?
A) Only at the beginning and end of the dive
B) Every 5 minutes or more frequently if needed
C) Only when your buddy signals you
D) Only if you feel out of breath
Answer: B) Every 5 minutes or more frequently if needed
,Rationale: Regular air checks ensure you have sufficient air to complete the dive
safely and avoid running out underwater.
3. When performing a buoyancy check at the surface, what is the proper
procedure?
A) Inflate your BCD fully and float at the surface
B) Hold your breath and sink slowly
C) Take a normal breath, hold it, and adjust weight until you float at eye level with
a normal breath
D) Take a deep breath and stay submerged
Answer: C) Take a normal breath, hold it, and adjust weight until you float at eye
level with a normal breath
Rationale: This procedure helps ensure correct weighting, so you can maintain
neutral buoyancy easily during the dive.
4. What is the maximum recommended ascent rate during an open water dive?
A) 30 feet per minute (9 meters per minute)
B) 60 feet per minute (18 meters per minute)
C) 100 feet per minute (30 meters per minute)
D) No ascent rate limit
Answer: A) 30 feet per minute (9 meters per minute)
Rationale: Ascending slowly (no faster than 30 feet per minute) reduces the risk
of decompression sickness by allowing nitrogen to safely off-gas.
, 5. Which signal indicates that you have run out of air?
A) Tapping your head
B) Drawing a finger across your throat
C) Waving your arms overhead
D) Thumbs up signal
Answer: B) Drawing a finger across your throat
Rationale: This universally recognized signal alerts your buddy or instructor that
you have an out-of-air emergency.
6. What should you do if you lose contact with your buddy underwater?
A) Immediately surface alone
B) Search for your buddy for up to one minute, then surface safely while looking
around
C) Stay in place and wait indefinitely
D) Swim quickly to the surface
Answer: B) Search for your buddy for up to one minute, then surface safely while
looking around
Rationale: This procedure minimizes risk by giving time to locate your buddy but
also ensures you don’t stay lost underwater too long.
7. What is the primary purpose of a dive computer?