How to scuba dive safely
  • 1. What is the most important rule in scuba diving?
A) Have fun
B) Always dive with a buddy
C) Never hold your breath
D) Check your gear
  • 2. What is the purpose of a buoyancy compensator (BCD)?
A) To provide air
B) To see underwater
C) To control buoyancy
D) To carry the tank
  • 3. What does 'decompression sickness' result from?
A) Nitrogen bubbles forming in the body
B) Carbon dioxide poisoning
C) Lack of oxygen
D) Shark bites
  • 4. What is the primary function of a dive computer?
A) To take underwater pictures
B) To communicate with the surface
C) To navigate underwater
D) To track depth and time to prevent decompression sickness
  • 5. What should you do if you experience ear pain during descent?
A) Continue descending slowly
B) Plug your nose
C) Stop and equalize
D) Ignore the pain
  • 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 fill the tank
B) To control buoyancy
C) To reduce tank pressure to a breathable level
D) To measure depth
  • 8. What does 'buddy check' refer to?
A) Checking your buddy's gear before a dive
B) Sharing air with a buddy
C) Swimming with a buddy
D) Helping your buddy get certified
  • 9. What is the purpose of a dive flag?
A) To attract fish
B) To warn boats of divers in the area
C) To signal for help
D) To mark the dive site
  • 10. What causes 'nitrogen narcosis'?
A) Decompression sickness
B) Lack of oxygen
C) Carbon dioxide poisoning
D) Increased partial pressure of nitrogen at depth
  • 11. Which of these is NOT a sign of oxygen toxicity?
A) Euphoria
B) Twitching
C) Visual disturbances
D) Convulsions
  • 12. What is the minimum recommended surface interval after a single dive?
A) 30 minutes
B) No surface interval needed
C) One hour
D) Two hours
  • 13. What is the purpose of a wetsuit or drysuit?
A) To provide thermal protection
B) To provide buoyancy
C) To increase speed
D) To provide air
  • 14. What does the acronym 'SAC rate' stand for?
A) Safe Ascent Calculation rate
B) Standard Air Check rate
C) Scuba Air Capacity rate
D) Surface Air Consumption rate
  • 15. If you run low on air underwater, what should you do?
A) Hold your breath and swim to the surface
B) Panic
C) Signal your buddy and ascend safely
D) Continue the dive
  • 16. Which marine animal is LEAST likely to be aggressive towards divers?
A) Barracuda
B) Shark
C) Seahorse
D) Moray Eel
  • 17. What is the best way to avoid entanglement underwater?
A) Maintain awareness of your surroundings
B) Dive alone
C) Swim quickly
D) Ignore potential hazards
  • 18. What should you do if you encounter a strong current?
A) Continue the dive as planned
B) Panic
C) Swim across the current to shore or a fixed object
D) Fight against the current
  • 19. What is the purpose of a weight belt?
A) To provide warmth
B) To counteract buoyancy
C) To help you swim faster
D) To carry tools
  • 20. What is the minimum certification level usually required for wreck diving?
A) Divemaster
B) Rescue Diver
C) Open Water Diver
D) Advanced Open Water Diver
  • 21. What does 'equalization' refer to in diving?
A) Balancing pressure in your ears and sinuses
B) Balancing your air consumption
C) Balancing your buddy's gear
D) Balancing your weight underwater
  • 22. What is a common cause of dive accidents?
A) Equipment failure
B) Poor visibility
C) Shark attacks
D) Panic
  • 23. How often should you service your scuba regulator?
A) Every 6 months
B) Annually
C) Only when it breaks
D) Every 5 years
  • 24. What is the best way to protect coral reefs while diving?
A) Touch the coral
B) Maintain neutral buoyancy
C) Collect souvenirs
D) Feed the fish
  • 25. What is the most important factor in choosing a dive site?
A) Popularity
B) Your experience level
C) Number of fish
D) Cost
  • 26. What action should you take if you become entangled in fishing line underwater?
A) Pull sharply to break the line
B) Use a cutting tool to free yourself carefully
C) Panic and swim quickly
D) Ignore it and continue diving
  • 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) Improved visibility
D) Increased depth capabilities
  • 28. Why is it important to avoid diving when you have a cold or congestion?
A) It makes it harder to breathe through your regulator
B) It makes you more susceptible to nitrogen narcosis
C) It can make equalization difficult or impossible, causing barotrauma.
D) It increases your risk of shark attack
  • 29. What is the recommended procedure for deploying a surface marker buoy (SMB)?
A) Release from the surface
B) Attach it to a marine animal
C) Throw it as far as possible
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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