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Scuba Diving Final Exam (2025/2026)
UPDATE|EXAM QUESTIONS WITH
MULTIPLE CHOICES |VERIFIED & REVISED
ANSWERS (NEW)!!
What will the buoyancy of an object be (positive, neutral, or
negative) if it displaces an amount of water:
a. more than its own weight?
b. less than its own weight?
c. equal to its own weight? Ans: a. positive
b. negative
c. neutral
How does the buoyancy of an object differ in fresh water
compared to salt water. Ans: Because salt water weighs more
than fresh water, it causes more buoyancy (more upward force)
What is the relationship between increasing and decreasing
depth and water pressure? Ans: With increasing depth the
water pressure increases. With decreasing depth the water
pressure decreases.
What are the absolute pressures, air volume, and air density in
atmospheres, for:
a. 10m/33ft
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b. 20m/66ft
b. 30m/99ft
c. 40m/132ft Ans: a. 2 bar/ata, 1/2, x 2
b. 3 bar/ata, 1/3, x 3
c. 4 bar/ata, 1/4, x4
d. 5 bar/ata, 1/5, x5
What is the relationship between air volume and density, and
how do they vary according to this relationship when pressure
increases or decreases? Ans: Air volume and density change
proportionately with pressure. As pressure increases, air volume
decreases, and air density increases. As pressure decreases, air
volume increases, and air density decreases.
What is a "squeeze"? Ans: A pressure imbalance that pushes
tissues into an air space.
What is "equalization"? Ans: The process of adding air to an air
space.
What are the three ways you can equalize air spaces during
descent? Ans: 1. pinch your nose and blow gently against it
2. wiggling your jaw side-to-side and swallowing
3. blow air into mask through your nose
How often should you equalize during descent? Ans: Frequently
Scuba Diving Final Exam (2025/2026)
UPDATE|EXAM QUESTIONS WITH
MULTIPLE CHOICES |VERIFIED & REVISED
ANSWERS (NEW)!!
What will the buoyancy of an object be (positive, neutral, or
negative) if it displaces an amount of water:
a. more than its own weight?
b. less than its own weight?
c. equal to its own weight? Ans: a. positive
b. negative
c. neutral
How does the buoyancy of an object differ in fresh water
compared to salt water. Ans: Because salt water weighs more
than fresh water, it causes more buoyancy (more upward force)
What is the relationship between increasing and decreasing
depth and water pressure? Ans: With increasing depth the
water pressure increases. With decreasing depth the water
pressure decreases.
What are the absolute pressures, air volume, and air density in
atmospheres, for:
a. 10m/33ft
, Page | 2
b. 20m/66ft
b. 30m/99ft
c. 40m/132ft Ans: a. 2 bar/ata, 1/2, x 2
b. 3 bar/ata, 1/3, x 3
c. 4 bar/ata, 1/4, x4
d. 5 bar/ata, 1/5, x5
What is the relationship between air volume and density, and
how do they vary according to this relationship when pressure
increases or decreases? Ans: Air volume and density change
proportionately with pressure. As pressure increases, air volume
decreases, and air density increases. As pressure decreases, air
volume increases, and air density decreases.
What is a "squeeze"? Ans: A pressure imbalance that pushes
tissues into an air space.
What is "equalization"? Ans: The process of adding air to an air
space.
What are the three ways you can equalize air spaces during
descent? Ans: 1. pinch your nose and blow gently against it
2. wiggling your jaw side-to-side and swallowing
3. blow air into mask through your nose
How often should you equalize during descent? Ans: Frequently
