SSI SCIENCE OF DIVING QUESTIONS AND CORRECT
ANSWERS (VERIFIED ANSWERS) Q&A
2027|INSTANT DOWNLOAD PDF
1. What is the primary purpose of studying the science of
diving?
A. To increase underwater speed
B. To understand how diving affects the human body and
equipment
C. To eliminate the need for training
D. To avoid using scuba equipment
Correct Answer: B. To understand how diving affects the
human body and equipment
Rationale: Science of diving explains pressure effects, gas
behavior, physiology, and equipment principles that help divers
plan safe dives.
2. What law explains the relationship between pressure and
volume of a gas at constant temperature?
A. Dalton’s Law
B. Henry’s Law
C. Boyle’s Law
D. Archimedes’ Principle
,Correct Answer: C. Boyle’s Law
Rationale: Boyle’s Law states that as pressure increases, gas
volume decreases, and as pressure decreases, gas volume
increases.
3. As a diver descends underwater, the surrounding pressure:
A. Decreases
B. Remains constant
C. Increases
D. Becomes zero
Correct Answer: C. Increases
Rationale: Water pressure increases with depth because of the
weight of the water column above the diver.
4. What is the approximate pressure increase for every 10
meters (33 feet) of seawater?
A. 0.5 atmospheres
B. 1 atmosphere
C. 5 atmospheres
D. 10 atmospheres
Correct Answer: B. 1 atmosphere
Rationale: Each 10 meters of seawater adds approximately one
additional atmosphere of pressure.
,5. Which gas law explains why air spaces in the body must be
equalized during descent?
A. Boyle’s Law
B. Charles’ Law
C. Dalton’s Law
D. Gay-Lussac’s Law
Correct Answer: A. Boyle’s Law
Rationale: Boyle’s Law explains compression and expansion of
air spaces such as ears, sinuses, and lungs.
6. What happens to a diver’s air spaces during ascent if air is
not released?
A. They shrink
B. They remain unchanged
C. They expand
D. They disappear
Correct Answer: C. They expand
Rationale: Reduced pressure during ascent causes trapped
gases to expand.
7. Which principle explains why objects appear closer
underwater than they actually are?
, A. Refraction
B. Absorption
C. Diffusion
D. Conduction
Correct Answer: A. Refraction
Rationale: Light bends when it passes between water and air,
affecting underwater vision.
8. Why do colors appear different underwater?
A. Water increases brightness
B. Water absorbs light wavelengths at different rates
C. Masks change color perception
D. Pressure removes colors
Correct Answer: B. Water absorbs light wavelengths at
different rates
Rationale: Red colors disappear first because water absorbs
longer wavelengths more quickly.
9. What principle explains why a diver floats more easily with
a full BCD?
A. Boyle’s Law
B. Pascal’s Law
C. Archimedes’ Principle
D. Dalton’s Law
ANSWERS (VERIFIED ANSWERS) Q&A
2027|INSTANT DOWNLOAD PDF
1. What is the primary purpose of studying the science of
diving?
A. To increase underwater speed
B. To understand how diving affects the human body and
equipment
C. To eliminate the need for training
D. To avoid using scuba equipment
Correct Answer: B. To understand how diving affects the
human body and equipment
Rationale: Science of diving explains pressure effects, gas
behavior, physiology, and equipment principles that help divers
plan safe dives.
2. What law explains the relationship between pressure and
volume of a gas at constant temperature?
A. Dalton’s Law
B. Henry’s Law
C. Boyle’s Law
D. Archimedes’ Principle
,Correct Answer: C. Boyle’s Law
Rationale: Boyle’s Law states that as pressure increases, gas
volume decreases, and as pressure decreases, gas volume
increases.
3. As a diver descends underwater, the surrounding pressure:
A. Decreases
B. Remains constant
C. Increases
D. Becomes zero
Correct Answer: C. Increases
Rationale: Water pressure increases with depth because of the
weight of the water column above the diver.
4. What is the approximate pressure increase for every 10
meters (33 feet) of seawater?
A. 0.5 atmospheres
B. 1 atmosphere
C. 5 atmospheres
D. 10 atmospheres
Correct Answer: B. 1 atmosphere
Rationale: Each 10 meters of seawater adds approximately one
additional atmosphere of pressure.
,5. Which gas law explains why air spaces in the body must be
equalized during descent?
A. Boyle’s Law
B. Charles’ Law
C. Dalton’s Law
D. Gay-Lussac’s Law
Correct Answer: A. Boyle’s Law
Rationale: Boyle’s Law explains compression and expansion of
air spaces such as ears, sinuses, and lungs.
6. What happens to a diver’s air spaces during ascent if air is
not released?
A. They shrink
B. They remain unchanged
C. They expand
D. They disappear
Correct Answer: C. They expand
Rationale: Reduced pressure during ascent causes trapped
gases to expand.
7. Which principle explains why objects appear closer
underwater than they actually are?
, A. Refraction
B. Absorption
C. Diffusion
D. Conduction
Correct Answer: A. Refraction
Rationale: Light bends when it passes between water and air,
affecting underwater vision.
8. Why do colors appear different underwater?
A. Water increases brightness
B. Water absorbs light wavelengths at different rates
C. Masks change color perception
D. Pressure removes colors
Correct Answer: B. Water absorbs light wavelengths at
different rates
Rationale: Red colors disappear first because water absorbs
longer wavelengths more quickly.
9. What principle explains why a diver floats more easily with
a full BCD?
A. Boyle’s Law
B. Pascal’s Law
C. Archimedes’ Principle
D. Dalton’s Law
