SCUBA DIVING FINAL EXAM 2025/2026
QUESTIONS AND ANSWERS 100% PASS
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
b. 20m/66ft
b. 30m/99ft
1 @COPYRIGHT 2025/2026.
, 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
What three steps should you take if you feel discomfort in an air space while descending? -
ANS 1. stop your descent
2. signal your buddy(ies)
3. ascend slightly until the discomfort passes and try again
What is the most important rule in scuba diving? - ANS to breathe continuously and never,
ever hold your breath
2 @COPYRIGHT 2025/2026.
QUESTIONS AND ANSWERS 100% PASS
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
b. 20m/66ft
b. 30m/99ft
1 @COPYRIGHT 2025/2026.
, 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
What three steps should you take if you feel discomfort in an air space while descending? -
ANS 1. stop your descent
2. signal your buddy(ies)
3. ascend slightly until the discomfort passes and try again
What is the most important rule in scuba diving? - ANS to breathe continuously and never,
ever hold your breath
2 @COPYRIGHT 2025/2026.
