PADI Open Water Diver Final Exam 2026 | Complete Questions
with Correct Answers and Rationales.
Question 1
What is the primary purpose of scuba diving training?
A. To allow divers to dive as deep as possible
B. To teach divers safe diving practices and responsible underwater behavior
C. To eliminate the need for dive equipment
D. To allow divers to dive without supervision
Correct Answer: B. To teach divers safe diving practices and responsible
underwater behavior
Rationale:
Scuba training focuses on safety, equipment use, problem-solving,
environmental awareness, and responsible diving techniques.
Question 2
What does SCUBA stand for?
A. Safe Controlled Underwater Breathing Apparatus
B. Self-Contained Underwater Breathing Apparatus
C. Surface Controlled Underwater Breathing Air
D. Submerged Controlled Universal Breathing Assembly
Correct Answer: B. Self-Contained Underwater Breathing Apparatus
Rationale:
SCUBA refers to a system that allows divers to breathe underwater using a
portable air supply.
Question 3
1|Page
,Why should a diver never hold their breath while ascending?
A. It increases air consumption
B. It may cause lung overexpansion injuries
C. It reduces visibility
D. It damages the regulator
Correct Answer: B. It may cause lung overexpansion injuries
Rationale:
As a diver ascends, expanding air in the lungs must be released. Holding the
breath can cause serious pressure-related injuries.
Question 4
What is the purpose of a regulator?
A. To control buoyancy
B. To reduce tank pressure to breathable pressure
C. To measure depth
D. To warm the diver
Correct Answer: B. To reduce tank pressure to breathable pressure
Rationale:
A regulator allows a diver to breathe air from the tank by reducing high-
pressure air to a usable pressure.
Question 5
What device helps a diver control buoyancy?
A. Compass
B. Buoyancy Control Device (BCD)
C. Mask
D. Snorkel
2|Page
,Correct Answer: B. Buoyancy Control Device (BCD)
Rationale:
The BCD allows divers to add or release air to achieve neutral buoyancy.
Question 6
What is the purpose of a dive computer?
A. To replace scuba equipment
B. To monitor dive information such as depth and time
C. To increase underwater speed
D. To provide emergency air
Correct Answer: B. To monitor dive information such as depth and time
Rationale:
Dive computers help divers track depth, bottom time, ascent rate, and
decompression information.
Question 7
What should a diver do before every dive?
A. Ignore equipment checks
B. Perform a safety check with their buddy
C. Remove the regulator
D. Dive immediately
Correct Answer: B. Perform a safety check with their buddy
Rationale:
Buddy checks help identify equipment problems before entering the water.
Question 8
3|Page
, Why is a buddy system important in scuba diving?
A. It allows divers to compete underwater
B. It provides assistance during emergencies
C. It eliminates the need for training
D. It allows deeper dives
Correct Answer: B. It provides assistance during emergencies
Rationale:
A buddy can help with equipment problems, emergencies, navigation, and
safety decisions.
Question 9
What happens to air spaces in the body during descent?
A. They decrease in size
B. They expand
C. They disappear
D. They become filled with water
Correct Answer: A. They decrease in size
Rationale:
Increasing pressure during descent compresses air spaces, requiring
equalization.
Question 10
How should a diver equalize pressure in the ears?
A. Hold the breath
B. Perform equalization techniques such as gently blowing against pinched
nostrils
C. Descend faster
D. Remove the mask
4|Page
with Correct Answers and Rationales.
Question 1
What is the primary purpose of scuba diving training?
A. To allow divers to dive as deep as possible
B. To teach divers safe diving practices and responsible underwater behavior
C. To eliminate the need for dive equipment
D. To allow divers to dive without supervision
Correct Answer: B. To teach divers safe diving practices and responsible
underwater behavior
Rationale:
Scuba training focuses on safety, equipment use, problem-solving,
environmental awareness, and responsible diving techniques.
Question 2
What does SCUBA stand for?
A. Safe Controlled Underwater Breathing Apparatus
B. Self-Contained Underwater Breathing Apparatus
C. Surface Controlled Underwater Breathing Air
D. Submerged Controlled Universal Breathing Assembly
Correct Answer: B. Self-Contained Underwater Breathing Apparatus
Rationale:
SCUBA refers to a system that allows divers to breathe underwater using a
portable air supply.
Question 3
1|Page
,Why should a diver never hold their breath while ascending?
A. It increases air consumption
B. It may cause lung overexpansion injuries
C. It reduces visibility
D. It damages the regulator
Correct Answer: B. It may cause lung overexpansion injuries
Rationale:
As a diver ascends, expanding air in the lungs must be released. Holding the
breath can cause serious pressure-related injuries.
Question 4
What is the purpose of a regulator?
A. To control buoyancy
B. To reduce tank pressure to breathable pressure
C. To measure depth
D. To warm the diver
Correct Answer: B. To reduce tank pressure to breathable pressure
Rationale:
A regulator allows a diver to breathe air from the tank by reducing high-
pressure air to a usable pressure.
Question 5
What device helps a diver control buoyancy?
A. Compass
B. Buoyancy Control Device (BCD)
C. Mask
D. Snorkel
2|Page
,Correct Answer: B. Buoyancy Control Device (BCD)
Rationale:
The BCD allows divers to add or release air to achieve neutral buoyancy.
Question 6
What is the purpose of a dive computer?
A. To replace scuba equipment
B. To monitor dive information such as depth and time
C. To increase underwater speed
D. To provide emergency air
Correct Answer: B. To monitor dive information such as depth and time
Rationale:
Dive computers help divers track depth, bottom time, ascent rate, and
decompression information.
Question 7
What should a diver do before every dive?
A. Ignore equipment checks
B. Perform a safety check with their buddy
C. Remove the regulator
D. Dive immediately
Correct Answer: B. Perform a safety check with their buddy
Rationale:
Buddy checks help identify equipment problems before entering the water.
Question 8
3|Page
, Why is a buddy system important in scuba diving?
A. It allows divers to compete underwater
B. It provides assistance during emergencies
C. It eliminates the need for training
D. It allows deeper dives
Correct Answer: B. It provides assistance during emergencies
Rationale:
A buddy can help with equipment problems, emergencies, navigation, and
safety decisions.
Question 9
What happens to air spaces in the body during descent?
A. They decrease in size
B. They expand
C. They disappear
D. They become filled with water
Correct Answer: A. They decrease in size
Rationale:
Increasing pressure during descent compresses air spaces, requiring
equalization.
Question 10
How should a diver equalize pressure in the ears?
A. Hold the breath
B. Perform equalization techniques such as gently blowing against pinched
nostrils
C. Descend faster
D. Remove the mask
4|Page
