SSI Open Water Diver Written Exam – Comprehensive Study Guide, Key Concepts & Practice
Questions Review
Proper equalization techniques must be learned in order to:
A. Prevent squeeze injuries
B. Prevent ear pain
C. Prevent sinus squeeze
D. All answers are correct - correct answer ✔✔D. All answers are correct
Which of the statements concerning sound transmission underwater is incorrect?
A. Sound will travel farther underwater then in air
B. Divers find it difficult to locate the direction of a sound producing source
C. Divers find it easy to talk to each other directly through water
D. Sound travels four times faster underwater than in air - correct answer ✔✔C. Divers find it
easy to talk to each other directly through water
Saltwater weighs ___ pounds per cubic foot and freshwater weighs ___pounds per cubic foot.
A. 65/68
B. 54/50
C. 64/62.5
D. They both weight the same - correct answer ✔✔C. 64/62.5
Earplugs:
A. Aid equalization of the middle of the ear
B. Should never be worn while diving
C. Protect against cold
D. Prevent ears from squeeze - correct answer ✔✔B. Should never be worn while diving
,The condition in which certain colors are diminished as depth increases is called:
A. Absorption
B. Refraction
C. Turbidity
D. Diffusion - correct answer ✔✔A. Absorption
The first symptom of a sinus squeeze is usually:
A. A dull pain deep within the head
B. A sharp pain at the base of the neck
C. A sharp pain or wedging sensation above the eyes
D. A crushing pain high in the chest - correct answer ✔✔C. A sharp pain or wedging sensation
above the eyes
Ear squeeze can be prevented by:
A. Relaxing
B. Never diving with a cold
C. Rotating the jaw, swallowing, or Valsalva
D. All answers are correct - correct answer ✔✔D. All answers are correct
Sinus squeeze can be prevented by:
A. Not diving with a cold
B. Valsalva technique
C. Wearing ear plugs
D. Tilting the divers head back and forth - correct answer ✔✔A. Not diving with a cold
, The purpose of equalization is to:
A. Ensure the uneven application of pressure between the water and air spaces in the body
B. Prevent water from entering air spaces in the body
C. Introduce additional air into body air spaces in response to increasing external pressure
D. Remove all fluids from body air spaces - correct answer ✔✔C. Introduce additional air into
body air spaces in response to increasing external pressure
Absolute pressure is defined as:
A. Total Pressure Exerted on an Object
B. The weight of the water that surrounds the diver
C. The pressure at the surface plus 1 ata
D. All Answers are correct - correct answer ✔✔A. Total Pressure Exerted on an Object
One atmosphere of pressure is defined as:
A. 1 bar
B. Each 34ft of depth in fresh water
C. Each 33ft of depth in sea water
D. All answers are correct - correct answer ✔✔D. All answers are correct
Gauge pressure is defined as:
A. The depth reading on a gauge
B. The pressure at the surface
C. Hydrostatic pressure minus 1 ata
D. Absolute pressure minus 1 ata - correct answer ✔✔D. Absolute pressure minus 1 ata
The greatest relative pressure change in seawater takes place between ____ and ____ feet.
Questions Review
Proper equalization techniques must be learned in order to:
A. Prevent squeeze injuries
B. Prevent ear pain
C. Prevent sinus squeeze
D. All answers are correct - correct answer ✔✔D. All answers are correct
Which of the statements concerning sound transmission underwater is incorrect?
A. Sound will travel farther underwater then in air
B. Divers find it difficult to locate the direction of a sound producing source
C. Divers find it easy to talk to each other directly through water
D. Sound travels four times faster underwater than in air - correct answer ✔✔C. Divers find it
easy to talk to each other directly through water
Saltwater weighs ___ pounds per cubic foot and freshwater weighs ___pounds per cubic foot.
A. 65/68
B. 54/50
C. 64/62.5
D. They both weight the same - correct answer ✔✔C. 64/62.5
Earplugs:
A. Aid equalization of the middle of the ear
B. Should never be worn while diving
C. Protect against cold
D. Prevent ears from squeeze - correct answer ✔✔B. Should never be worn while diving
,The condition in which certain colors are diminished as depth increases is called:
A. Absorption
B. Refraction
C. Turbidity
D. Diffusion - correct answer ✔✔A. Absorption
The first symptom of a sinus squeeze is usually:
A. A dull pain deep within the head
B. A sharp pain at the base of the neck
C. A sharp pain or wedging sensation above the eyes
D. A crushing pain high in the chest - correct answer ✔✔C. A sharp pain or wedging sensation
above the eyes
Ear squeeze can be prevented by:
A. Relaxing
B. Never diving with a cold
C. Rotating the jaw, swallowing, or Valsalva
D. All answers are correct - correct answer ✔✔D. All answers are correct
Sinus squeeze can be prevented by:
A. Not diving with a cold
B. Valsalva technique
C. Wearing ear plugs
D. Tilting the divers head back and forth - correct answer ✔✔A. Not diving with a cold
, The purpose of equalization is to:
A. Ensure the uneven application of pressure between the water and air spaces in the body
B. Prevent water from entering air spaces in the body
C. Introduce additional air into body air spaces in response to increasing external pressure
D. Remove all fluids from body air spaces - correct answer ✔✔C. Introduce additional air into
body air spaces in response to increasing external pressure
Absolute pressure is defined as:
A. Total Pressure Exerted on an Object
B. The weight of the water that surrounds the diver
C. The pressure at the surface plus 1 ata
D. All Answers are correct - correct answer ✔✔A. Total Pressure Exerted on an Object
One atmosphere of pressure is defined as:
A. 1 bar
B. Each 34ft of depth in fresh water
C. Each 33ft of depth in sea water
D. All answers are correct - correct answer ✔✔D. All answers are correct
Gauge pressure is defined as:
A. The depth reading on a gauge
B. The pressure at the surface
C. Hydrostatic pressure minus 1 ata
D. Absolute pressure minus 1 ata - correct answer ✔✔D. Absolute pressure minus 1 ata
The greatest relative pressure change in seawater takes place between ____ and ____ feet.
