PADI Divemaster Knowledge Review
Exam – Practice Test Newest 2026
Updated Practice Exam | 100 Most
Tested Questions Collection & Verified
Detailed Answers | Tutor Verified
Success Exam) Graded A+
1. Which of the following best describes the role of a Divemaster?
A. Teach entry-level scuba courses independently
B. Supervise certified divers and assist instructors
C. Certify advanced divers
D. Conduct equipment repairs
Answer: B. Supervise certified divers and assist instructors ✔
Rationale: A Divemaster’s primary role is supervision and assisting instructors, not
independent teaching or certification.
2. What is the most critical factor when assessing dive site conditions?
A. Water temperature
B. Visibility
C. Current strength
D. Tide tables
Answer: C. Current strength ✔
Rationale: Current strength directly impacts diver safety, air consumption, and
navigation.
,3. Dalton’s Law states that:
A. Pressure increases with depth
B. Total pressure equals sum of partial pressures
C. Gas volume decreases with pressure
D. Gases dissolve proportionally
Answer: B. Total pressure equals sum of partial pressures ✔
Rationale: Dalton’s Law explains how each gas contributes to total pressure.
4. A diver experiences shallow breathing underwater. This increases risk of:
A. Nitrogen narcosis
B. Oxygen toxicity
C. Carbon dioxide buildup
D. Decompression sickness
Answer: C. Carbon dioxide buildup ✔
Rationale: Hypoventilation leads to CO₂ retention, increasing stress and panic risk.
5. What is the recommended ascent rate for recreational diving?
A. 30 m/min
B. 18 m/min
C. 9 m/min
D. 3 m/min
Answer: C. 9 m/min ✔
Rationale: A slow ascent rate reduces risk of decompression sickness.
6. Which condition is caused by nitrogen bubbles forming in tissues?
A. Lung overexpansion injury
B. Decompression sickness
, C. Oxygen toxicity
D. Hypothermia
Answer: B. Decompression sickness ✔
Rationale: DCS occurs due to dissolved nitrogen forming bubbles during ascent.
7. Boyle’s Law explains:
A. Pressure and temperature relationship
B. Volume inversely proportional to pressure
C. Gas absorption in liquids
D. Partial pressure effects
Answer: B. Volume inversely proportional to pressure ✔
Rationale: Boyle’s Law governs air space changes with depth.
8. What is the first step in responding to a missing diver?
A. Call emergency services
B. Start underwater search
C. Establish last known position
D. Alert boat crew
Answer: C. Establish last known position ✔
Rationale: Identifying the last known position ensures an effective search pattern.
9. A Divemaster should terminate a dive when:
A. Visibility drops slightly
B. A diver signals discomfort
C. Half tank is reached
D. At maximum depth
Answer: B. A diver signals discomfort ✔
Rationale: Diver safety and comfort always take priority.
Exam – Practice Test Newest 2026
Updated Practice Exam | 100 Most
Tested Questions Collection & Verified
Detailed Answers | Tutor Verified
Success Exam) Graded A+
1. Which of the following best describes the role of a Divemaster?
A. Teach entry-level scuba courses independently
B. Supervise certified divers and assist instructors
C. Certify advanced divers
D. Conduct equipment repairs
Answer: B. Supervise certified divers and assist instructors ✔
Rationale: A Divemaster’s primary role is supervision and assisting instructors, not
independent teaching or certification.
2. What is the most critical factor when assessing dive site conditions?
A. Water temperature
B. Visibility
C. Current strength
D. Tide tables
Answer: C. Current strength ✔
Rationale: Current strength directly impacts diver safety, air consumption, and
navigation.
,3. Dalton’s Law states that:
A. Pressure increases with depth
B. Total pressure equals sum of partial pressures
C. Gas volume decreases with pressure
D. Gases dissolve proportionally
Answer: B. Total pressure equals sum of partial pressures ✔
Rationale: Dalton’s Law explains how each gas contributes to total pressure.
4. A diver experiences shallow breathing underwater. This increases risk of:
A. Nitrogen narcosis
B. Oxygen toxicity
C. Carbon dioxide buildup
D. Decompression sickness
Answer: C. Carbon dioxide buildup ✔
Rationale: Hypoventilation leads to CO₂ retention, increasing stress and panic risk.
5. What is the recommended ascent rate for recreational diving?
A. 30 m/min
B. 18 m/min
C. 9 m/min
D. 3 m/min
Answer: C. 9 m/min ✔
Rationale: A slow ascent rate reduces risk of decompression sickness.
6. Which condition is caused by nitrogen bubbles forming in tissues?
A. Lung overexpansion injury
B. Decompression sickness
, C. Oxygen toxicity
D. Hypothermia
Answer: B. Decompression sickness ✔
Rationale: DCS occurs due to dissolved nitrogen forming bubbles during ascent.
7. Boyle’s Law explains:
A. Pressure and temperature relationship
B. Volume inversely proportional to pressure
C. Gas absorption in liquids
D. Partial pressure effects
Answer: B. Volume inversely proportional to pressure ✔
Rationale: Boyle’s Law governs air space changes with depth.
8. What is the first step in responding to a missing diver?
A. Call emergency services
B. Start underwater search
C. Establish last known position
D. Alert boat crew
Answer: C. Establish last known position ✔
Rationale: Identifying the last known position ensures an effective search pattern.
9. A Divemaster should terminate a dive when:
A. Visibility drops slightly
B. A diver signals discomfort
C. Half tank is reached
D. At maximum depth
Answer: B. A diver signals discomfort ✔
Rationale: Diver safety and comfort always take priority.
