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How to scuba dive safely
Contributed by: Roe
  • 1. What is the most important rule in scuba diving?
A) Check your gear
B) Have fun
C) Never hold your breath
D) Always dive with a buddy
  • 2. What is the purpose of a buoyancy compensator (BCD)?
A) To provide air
B) To see underwater
C) To carry the tank
D) To control buoyancy
  • 3. What does 'decompression sickness' result from?
A) Nitrogen bubbles forming in the body
B) Shark bites
C) Carbon dioxide poisoning
D) Lack of oxygen
  • 4. What is the primary function of a dive computer?
A) To navigate underwater
B) To track depth and time to prevent decompression sickness
C) To communicate with the surface
D) To take underwater pictures
  • 5. What should you do if you experience ear pain during descent?
A) Continue descending slowly
B) Stop and equalize
C) Ignore the pain
D) Plug your nose
  • 6. What is the recommended ascent rate?
A) 60 feet per minute
B) 30 feet per minute
C) As fast as possible
D) Immediately
  • 7. What is the function of a regulator?
A) To control buoyancy
B) To reduce tank pressure to a breathable level
C) To fill the tank
D) To measure depth
  • 8. What does 'buddy check' refer to?
A) Checking your buddy's gear before a dive
B) Helping your buddy get certified
C) Sharing air with a buddy
D) Swimming with a buddy
  • 9. What is the purpose of a dive flag?
A) To mark the dive site
B) To warn boats of divers in the area
C) To attract fish
D) To signal for help
  • 10. What causes 'nitrogen narcosis'?
A) Increased partial pressure of nitrogen at depth
B) Lack of oxygen
C) Decompression sickness
D) Carbon dioxide poisoning
  • 11. Which of these is NOT a sign of oxygen toxicity?
A) Visual disturbances
B) Euphoria
C) Convulsions
D) Twitching
  • 12. What is the minimum recommended surface interval after a single dive?
A) Two hours
B) No surface interval needed
C) One hour
D) 30 minutes
  • 13. What is the purpose of a wetsuit or drysuit?
A) To provide buoyancy
B) To provide thermal protection
C) To provide air
D) To increase speed
  • 14. What does the acronym 'SAC rate' stand for?
A) Scuba Air Capacity rate
B) Safe Ascent Calculation rate
C) Surface Air Consumption rate
D) Standard Air Check rate
  • 15. If you run low on air underwater, what should you do?
A) Panic
B) Continue the dive
C) Signal your buddy and ascend safely
D) Hold your breath and swim to the surface
  • 16. Which marine animal is LEAST likely to be aggressive towards divers?
A) Shark
B) Seahorse
C) Barracuda
D) Moray Eel
  • 17. What is the best way to avoid entanglement underwater?
A) Swim quickly
B) Ignore potential hazards
C) Dive alone
D) Maintain awareness of your surroundings
  • 18. What should you do if you encounter a strong current?
A) Fight against the current
B) Continue the dive as planned
C) Swim across the current to shore or a fixed object
D) Panic
  • 19. What is the purpose of a weight belt?
A) To help you swim faster
B) To counteract buoyancy
C) To carry tools
D) To provide warmth
  • 20. What is the minimum certification level usually required for wreck diving?
A) Open Water Diver
B) Divemaster
C) Rescue Diver
D) Advanced Open Water Diver
  • 21. What does 'equalization' refer to in diving?
A) Balancing your air consumption
B) Balancing your buddy's gear
C) Balancing your weight underwater
D) Balancing pressure in your ears and sinuses
  • 22. What is a common cause of dive accidents?
A) Panic
B) Shark attacks
C) Poor visibility
D) Equipment failure
  • 23. How often should you service your scuba regulator?
A) Only when it breaks
B) Every 6 months
C) Every 5 years
D) Annually
  • 24. What is the best way to protect coral reefs while diving?
A) Maintain neutral buoyancy
B) Touch the coral
C) Collect souvenirs
D) Feed the fish
  • 25. What is the most important factor in choosing a dive site?
A) Your experience level
B) Popularity
C) Number of fish
D) Cost
  • 26. What action should you take if you become entangled in fishing line underwater?
A) Use a cutting tool to free yourself carefully
B) Ignore it and continue diving
C) Pull sharply to break the line
D) Panic and swim quickly
  • 27. What is the primary benefit of using Nitrox (Enriched Air Nitrox) when scuba diving?
A) Extended no-decompression limits
B) Reduced air consumption
C) Increased depth capabilities
D) Improved visibility
  • 28. Why is it important to avoid diving when you have a cold or congestion?
A) It makes you more susceptible to nitrogen narcosis
B) It increases your risk of shark attack
C) It makes it harder to breathe through your regulator
D) It can make equalization difficult or impossible, causing barotrauma.
  • 29. What is the recommended procedure for deploying a surface marker buoy (SMB)?
A) Throw it as far as possible
B) Attach it to a marine animal
C) Release from the surface
D) Inflate at depth and release while holding the line.
  • 30. Before diving, what should you do with all jewelry?
A) Wrap it in a waterproof container
B) Remove all jewelry
C) Tape it to your body
D) Nothing, it's fine to wear
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