Michigan Dive Team Certification Exams
Practice Questions And Correct Answers
(Verified Answers) Plus Rationale 2026
Q&A| Instant Download Pdf
1. During a standard open-water dive, the maximum recommended
depth for recreational divers using air is:
A. 20 meters
B. 30 meters
C. 40 meters
D. 50 meters
The maximum recommended depth for recreational divers on air is
40 meters due to nitrogen narcosis risk and decompression
limitations.
2. Which gas law explains why divers must ascend slowly to avoid
decompression sickness?
A. Boyle’s Law
B. Henry’s Law
C. Charles’s Law
D. Dalton’s Law
Henry’s Law states that gas solubility in a liquid increases under
pressure, which explains nitrogen absorption in tissues and the need
for slow ascent to prevent bubbles.
3. What is the primary purpose of a dive computer?
A. Track heart rate underwater
B. Record underwater photos
C. Monitor depth, time, and no-decompression limits
D. Regulate air supply
, Dive computers calculate safe no-decompression limits and track
depth and bottom time to prevent decompression sickness.
4. Which piece of equipment is used to prevent a diver from inhaling
water?
A. Regulator
B. Mask
C. Fins
D. BCD
The mask seals over the eyes and nose, creating an air space for clear
vision and preventing water from entering the nose and eyes.
5. Which condition is characterized by the presence of nitrogen bubbles
in the bloodstream?
A. Barotrauma
B. Hypothermia
C. Decompression sickness
D. Nitrogen narcosis
Decompression sickness occurs when dissolved nitrogen comes out of
solution too quickly, forming bubbles in blood and tissues.
6. What is the most important factor in preventing nitrogen narcosis?
A. Using oxygen-enriched air
B. Limiting depth
C. Wearing a drysuit
D. Increasing ascent speed
Nitrogen narcosis is depth-dependent; staying within recommended
depth limits reduces the risk.
7. Which emergency procedure is indicated if a diver loses consciousness
underwater?
A. Inflate BCD immediately
B. Controlled rescue ascent with continuous airway management
C. Signal for a boat pickup only
D. Drop weights and swim down
A controlled rescue ascent ensures the unconscious diver is brought
to the surface safely while maintaining airway and monitoring for
lung overexpansion.
, 8. The main function of a buoyancy control device (BCD) is to:
A. Provide extra air supply
B. Store diving equipment
C. Control ascent, descent, and neutral buoyancy
D. Protect from marine life
The BCD allows divers to adjust buoyancy to ascend, descend, or
hover neutrally at a given depth.
9. What is the recommended ascent rate for recreational dives?
A. 30 meters per minute
B. 20 meters per minute
C. 15 meters per minute
D. 9–10 meters per minute
A slow ascent of 9–10 meters per minute minimizes the risk of
decompression sickness and allows safe off-gassing of nitrogen.
10. Which of the following is a sign of oxygen toxicity during a dive?
A. Fatigue only
B. Shivering
C. Convulsions or visual disturbances
D. Dehydration
Oxygen toxicity can occur at high partial pressures, causing
neurological symptoms such as convulsions, tunnel vision, or
dizziness.
11. Before entering the water, a diver should always perform:
A. Mask defogging only
B. Pre-dive safety check
C. Full gear cleaning
D. Weight belt adjustment only
A pre-dive safety check ensures that all equipment is functioning
correctly, reducing risks underwater.
12. What is the primary cause of pulmonary barotrauma?
A. Rapid ascent while holding breath
B. Cold water immersion
C. Exhaling too little during ascent
D. Overhydration
Practice Questions And Correct Answers
(Verified Answers) Plus Rationale 2026
Q&A| Instant Download Pdf
1. During a standard open-water dive, the maximum recommended
depth for recreational divers using air is:
A. 20 meters
B. 30 meters
C. 40 meters
D. 50 meters
The maximum recommended depth for recreational divers on air is
40 meters due to nitrogen narcosis risk and decompression
limitations.
2. Which gas law explains why divers must ascend slowly to avoid
decompression sickness?
A. Boyle’s Law
B. Henry’s Law
C. Charles’s Law
D. Dalton’s Law
Henry’s Law states that gas solubility in a liquid increases under
pressure, which explains nitrogen absorption in tissues and the need
for slow ascent to prevent bubbles.
3. What is the primary purpose of a dive computer?
A. Track heart rate underwater
B. Record underwater photos
C. Monitor depth, time, and no-decompression limits
D. Regulate air supply
, Dive computers calculate safe no-decompression limits and track
depth and bottom time to prevent decompression sickness.
4. Which piece of equipment is used to prevent a diver from inhaling
water?
A. Regulator
B. Mask
C. Fins
D. BCD
The mask seals over the eyes and nose, creating an air space for clear
vision and preventing water from entering the nose and eyes.
5. Which condition is characterized by the presence of nitrogen bubbles
in the bloodstream?
A. Barotrauma
B. Hypothermia
C. Decompression sickness
D. Nitrogen narcosis
Decompression sickness occurs when dissolved nitrogen comes out of
solution too quickly, forming bubbles in blood and tissues.
6. What is the most important factor in preventing nitrogen narcosis?
A. Using oxygen-enriched air
B. Limiting depth
C. Wearing a drysuit
D. Increasing ascent speed
Nitrogen narcosis is depth-dependent; staying within recommended
depth limits reduces the risk.
7. Which emergency procedure is indicated if a diver loses consciousness
underwater?
A. Inflate BCD immediately
B. Controlled rescue ascent with continuous airway management
C. Signal for a boat pickup only
D. Drop weights and swim down
A controlled rescue ascent ensures the unconscious diver is brought
to the surface safely while maintaining airway and monitoring for
lung overexpansion.
, 8. The main function of a buoyancy control device (BCD) is to:
A. Provide extra air supply
B. Store diving equipment
C. Control ascent, descent, and neutral buoyancy
D. Protect from marine life
The BCD allows divers to adjust buoyancy to ascend, descend, or
hover neutrally at a given depth.
9. What is the recommended ascent rate for recreational dives?
A. 30 meters per minute
B. 20 meters per minute
C. 15 meters per minute
D. 9–10 meters per minute
A slow ascent of 9–10 meters per minute minimizes the risk of
decompression sickness and allows safe off-gassing of nitrogen.
10. Which of the following is a sign of oxygen toxicity during a dive?
A. Fatigue only
B. Shivering
C. Convulsions or visual disturbances
D. Dehydration
Oxygen toxicity can occur at high partial pressures, causing
neurological symptoms such as convulsions, tunnel vision, or
dizziness.
11. Before entering the water, a diver should always perform:
A. Mask defogging only
B. Pre-dive safety check
C. Full gear cleaning
D. Weight belt adjustment only
A pre-dive safety check ensures that all equipment is functioning
correctly, reducing risks underwater.
12. What is the primary cause of pulmonary barotrauma?
A. Rapid ascent while holding breath
B. Cold water immersion
C. Exhaling too little during ascent
D. Overhydration
