Скачать или смотреть PADI Open Water Diver Final Exam Review Updated Fall 2026

PADI Open Water Diver Final Exam Review — Fall 2026
☑️ Section 1: Diving Knowledge & Principles
1) Boyle’s Law

Q: A diver descends to 30 feet. What happens to the volume of air in a buoyancy compensator (BC) if the pressure doubles?
A. Volume doubles
B. Volume halves
C. Volume stays the same
D. Volume triples

Correct Answer: B. Volume halves
Rationale: Boyle’s Law: Pressure and volume are inversely related. At greater depth (higher pressure), air volume decreases.

2) Nitrogen Absorption

Q: Why must divers ascend slowly after a deep dive?
A. To conserve oxygen
B. To allow extra air into the lungs
C. To prevent nitrogen bubbles in tissues
D. To warm up

Correct Answer: C. To prevent nitrogen bubbles in tissues
Rationale: Slow ascent reduces the risk of decompression sickness from nitrogen coming out of solution too quickly.

3) Mask Clearing

Q: Your mask fills with water underwater. What’s the correct action?
A. Surface immediately
B. Tilt head back and squeeze nose while exhaling through nose
C. Hold breath and swim up
D. Close eyes

Correct Answer: B. Tilt head back and squeeze nose while exhaling through nose
Rationale: This clears the water safely by pushing it out without swallowing or inhaling it.

☑️ Section 2: Equipment & Problem Solving
4) Regulator Free Flow

Q: If your regulator starts free‑flowing underwater, what should you do?
A. Panic
B. Switch to alternate air source
C. Hold the regulator in your mouth and continue breathing
D. Close your eyes and swim up

Correct Answer: B. Switch to alternate air source
Rationale: A free‑flowing regulator wastes air — switch to your buddy’s alternate or your own and signal for assistance.

5) Buoyancy Control

Q: You’re sinking during descent even with lungs full. What’s the first action?
A. Exhale fully
B. Add air to BC slowly
C. Drop weights
D. Swim faster downward

Correct Answer: B. Add air to BC slowly
Rationale: Adding small amounts of air increases buoyancy and controls descent.

☑️ Section 3: Environmental Conditions & Dive Planning
6) Surface Conditions

Q: Which condition does NOT affect surface entry?
A. Wind
B. Current
C. Water temperature
D. Bottom composition

Correct Answer: D. Bottom composition
Rationale: Bottom composition affects only the underwater portion; wind, current, and waves change entry safety.

7) Dive Tables / Dive Time

Q: After a 60‑foot dive for 25 minutes, what should a diver do before a second dive?
A. Wait a 1‑hour surface interval
B. Descend immediately
C. Continue diving deeper
D. Drink water

Correct Answer: A. Wait a 1‑hour surface interval
Rationale: To reduce residual nitrogen before repeating dives.

(Actual table numbers vary — always follow PADI tables or computer.)

☑️ Section 4: Safety & Emergency Procedures
8) Out‑of‑Air Scenario

Q: If your air supply is critically low, the best first action is:
A. Signal your buddy and ascend together
B. Hold your breath and swim up
C. Drop your weights
D. Surface alone quickly

Correct Answer: A. Signal your buddy and ascend together
Rationale: Communicate and use buddy air sharing while ascending safely and controlled.

9) Buddy Separation

Q: If you lose sight of your buddy underwater, you should:
A. Search for 1 minute, then surface
B. Surface immediately
C. Continue deeper to look for them
D. Stay still and wait 5 minutes

Correct Answer: A. Search for 1 minute, then surface
Rationale: Standard PADI procedure: search briefly then surface to re‑establish contact.

☑️ Section 5: Marine Life & Conservation
10) Responsible Interaction

Q: While underwater you see a sea turtle. You should:
A. Touch it gently
B. Feed it
C. Observe from a safe distance
D. Chase it

Correct Answer: C. Observe from a safe distance
Rationale: Avoid touching or feeding wildlife to protect them and yourself.

🧠 Key Concepts to Master
Topic What You Must Know
Gas Laws Boyle’s, Dalton’s, Henry’s influences on diving
Buoyancy How BC, lungs, and weights affect depth
Equipment Regulator, BC, gauges, dive computer use
Dive Tables How to calculate no‑decompression time
Emergency Skills Air sharing, controlled ascents, lost buddy
Environment Currents, visibility, marine interactions
📌 Final Tips for Passing

✔ Read questions carefully — many are scenario‑based
✔ Visualize what you’d do underwater
✔ Think safety first
✔ Practice with mock exams (not real test questions)

https://www.learnexams.com/study-cont...