PADI Open Water Diver Certification – Final
Exam (Mock Test) | 200 2025/2026 COMPLETE
QUESTIONS WITH CORRECT DETAILED
ANSWERs
1.
What is the most important rule in scuba diving?
A. Always dive deep
B. Hold your breath when ascending
C. Breathe continuously and never hold your breath
D. Ascend quickly
Correct Answer: C
Rationale:
Holding your breath during ascent can cause lung overexpansion injuries. Continuous
breathing is critical.
2.
What happens to air volume in a balloon as you ascend?
A. It decreases
B. It stays the same
C. It increases
D. It disappears
Correct Answer: C
Rationale:
As pressure decreases during ascent, air expands (Boyle’s Law).
3.
What is the maximum recommended ascent rate?
,A. 30 meters/min
B. 18 meters/min
C. 9 meters/min
D. 3 meters/min
Correct Answer: C
Rationale:
Standard safe ascent rate is no faster than 9 m/min (30 ft/min).
4.
What should you do if you feel ear pain during descent?
A. Continue descending
B. Ascend slightly and equalize
C. Ignore it
D. Descend faster
Correct Answer: B
Rationale:
Pain indicates pressure imbalance—ascend slightly and equalize.
5.
What is nitrogen narcosis most similar to?
A. Severe pain
B. Alcohol intoxication
C. Sleep deprivation
D. Hypothermia
Correct Answer: B
Rationale:
Narcosis impairs judgment similar to being intoxicated.
6.
,What is the purpose of a safety stop?
A. Save air
B. Rest
C. Reduce risk of decompression sickness
D. Equalize ears
Correct Answer: C
Rationale:
A 3-minute stop at 5 meters helps eliminate excess nitrogen.
7.
What should you do if you run out of air underwater?
A. Panic and ascend rapidly
B. Share air with buddy and ascend
C. Hold breath
D. Remove regulator
Correct Answer: B
Rationale:
Use alternate air source and ascend safely.
8.
What does a dive computer track?
A. Oxygen only
B. Time and depth
C. Temperature only
D. Air consumption only
Correct Answer: B
Rationale:
It tracks depth, time, and no-decompression limits.
, 9.
What is the main risk of rapid ascent?
A. Hypothermia
B. Decompression sickness
C. Sunburn
D. Fatigue
Correct Answer: B
Rationale:
Rapid ascent can cause nitrogen bubbles in tissues.
10.
What should you do if separated from your buddy?
A. Search indefinitely
B. Surface immediately
C. Search for 1 minute, then ascend
D. Continue dive
Correct Answer: C
Rationale:
Standard rule: search briefly, then surface safely.
11.
What is neutral buoyancy?
A. Floating upward
B. Sinking
C. Staying at same depth effortlessly
D. Moving horizontally
Correct Answer: C
Rationale:
Neutral buoyancy allows effortless hovering.
Exam (Mock Test) | 200 2025/2026 COMPLETE
QUESTIONS WITH CORRECT DETAILED
ANSWERs
1.
What is the most important rule in scuba diving?
A. Always dive deep
B. Hold your breath when ascending
C. Breathe continuously and never hold your breath
D. Ascend quickly
Correct Answer: C
Rationale:
Holding your breath during ascent can cause lung overexpansion injuries. Continuous
breathing is critical.
2.
What happens to air volume in a balloon as you ascend?
A. It decreases
B. It stays the same
C. It increases
D. It disappears
Correct Answer: C
Rationale:
As pressure decreases during ascent, air expands (Boyle’s Law).
3.
What is the maximum recommended ascent rate?
,A. 30 meters/min
B. 18 meters/min
C. 9 meters/min
D. 3 meters/min
Correct Answer: C
Rationale:
Standard safe ascent rate is no faster than 9 m/min (30 ft/min).
4.
What should you do if you feel ear pain during descent?
A. Continue descending
B. Ascend slightly and equalize
C. Ignore it
D. Descend faster
Correct Answer: B
Rationale:
Pain indicates pressure imbalance—ascend slightly and equalize.
5.
What is nitrogen narcosis most similar to?
A. Severe pain
B. Alcohol intoxication
C. Sleep deprivation
D. Hypothermia
Correct Answer: B
Rationale:
Narcosis impairs judgment similar to being intoxicated.
6.
,What is the purpose of a safety stop?
A. Save air
B. Rest
C. Reduce risk of decompression sickness
D. Equalize ears
Correct Answer: C
Rationale:
A 3-minute stop at 5 meters helps eliminate excess nitrogen.
7.
What should you do if you run out of air underwater?
A. Panic and ascend rapidly
B. Share air with buddy and ascend
C. Hold breath
D. Remove regulator
Correct Answer: B
Rationale:
Use alternate air source and ascend safely.
8.
What does a dive computer track?
A. Oxygen only
B. Time and depth
C. Temperature only
D. Air consumption only
Correct Answer: B
Rationale:
It tracks depth, time, and no-decompression limits.
, 9.
What is the main risk of rapid ascent?
A. Hypothermia
B. Decompression sickness
C. Sunburn
D. Fatigue
Correct Answer: B
Rationale:
Rapid ascent can cause nitrogen bubbles in tissues.
10.
What should you do if separated from your buddy?
A. Search indefinitely
B. Surface immediately
C. Search for 1 minute, then ascend
D. Continue dive
Correct Answer: C
Rationale:
Standard rule: search briefly, then surface safely.
11.
What is neutral buoyancy?
A. Floating upward
B. Sinking
C. Staying at same depth effortlessly
D. Moving horizontally
Correct Answer: C
Rationale:
Neutral buoyancy allows effortless hovering.
