Scuba Diving Exam 1Questions and Answers-Solved by
Expert 2025
An object is positively buoyant when: - Correct Answersit displaces a volume of water weighting
more than its own weight
What two pieces of equipment do you use to control you buoyancy? - Correct AnswersBCD
Buoyancy control is one of the most important skills you can master because it allows you to
control where you are in the water. - Correct AnswersTrue
An object will be more buoyant in ____ than it would be in the ____. - Correct Answerssalt
water, fresh water
When you exhale, your lung volume decreases. This means you have _____ buoyancy. -
Correct Answersless
You usually feel pressure only in body air spaces because: - Correct Answersyour body is
mostly made of incompressible liquid, but air is compressible & changes volume with pressure
changes.
Pressure changes in water for a given ascent or descent are much more substantial than the
same distance ascent or descent in air because water weighs more. - Correct AnswersTrue
The 3 major air spaces affected by pressure when you descend are: - Correct Answersmask,
ears, & sinuses
A squeeze is: - Correct Answersa pressure imbalance in which pressure outside an air space
exceeds pressure inside an air space, resulting in pain or discomfort.
Equalization is adding air to an air space as you descend so the pressure in an air space equals
the surrounding water pressure. - Correct AnswersTrue
Which are techniques for equalizing your ears? - Correct Answers-Pinching your nose and blow
gently against it.
- Swallow and wiggle your jaw from side to side
You want to equalize your ears: - Correct Answersevery metro/few feet before you feel
discomfort
If you feel discomfort and can't equalize, ascend until you relieve the discomfort and try again.
Don't be forceful in equalizing. If you can't equalize, discontinue the dive. - Correct AnswersTrue
The most important rule in scuba diving is: Breathe continuously and never hold your breath. -
Correct AnswersTrue
Ascending while holding your breath: - Correct Answers-can cause lung over expansion injuries
-can cause serious injuries, including paralysis and death
, -causes injuries that are easy to by not holding your breath
A reverse block is: - Correct Answerspain and discomfort caused by expanding air trapped
inside and air space during ascent.
If you feel discomfort during ascent due to a reverse block, you should: - Correct Answersslow
or stop your ascent and give the trapped air time to work its way out.
As you go deeper, you consume air from your scuba cylinder: - Correct Answersfaster
The most efficient method for breathing underwater is rapid and shallow. - Correct
AnswersFalse
You need a mask to see underwater because: - Correct Answersthe human eye can't focus in
water
A mask needs to enclose your nose: - Correct Answersso you can equalize the mask
The features you look for in a mask include: - Correct Answerslow profile, nose or finger
pockets, wide vision field.
The most important factors when buying a mask (and other dive gear) are: - Correct Answersfit
& comfort
To prepare a new mask for use: - Correct Answers-scrub off the protective film left from
manufacturing
-adjust the strap
Maintenance for your mask (and most dive gear) includes: - Correct Answersrinsing in fresh
cold water after use
storing in a cool, dry place
You need a snorkel when scuba diving: - Correct Answers-to conserve air while swimming or
resting at the surface
-to make it easier to breathe when the surface is a bit rough
-in case you have a long swim with an empty cylinder
As easy breathing snorkel has which features? - Correct Answers-large bone
-smooth, rounded bends
A properly adjusted snorkel: - Correct Answers-remains in your mouth with a relaxed jaw
-sits on the left side of your mask
Fins helo you move more effectively by letting you use your leg muscles to swim - Correct
AnswersTrue
What type of fin do you normally wear with wet suit boots? - Correct Answersadjustable strap
fins
Which of the following are blade design features that enhance fin performance? - Correct
Answers-vents
Expert 2025
An object is positively buoyant when: - Correct Answersit displaces a volume of water weighting
more than its own weight
What two pieces of equipment do you use to control you buoyancy? - Correct AnswersBCD
Buoyancy control is one of the most important skills you can master because it allows you to
control where you are in the water. - Correct AnswersTrue
An object will be more buoyant in ____ than it would be in the ____. - Correct Answerssalt
water, fresh water
When you exhale, your lung volume decreases. This means you have _____ buoyancy. -
Correct Answersless
You usually feel pressure only in body air spaces because: - Correct Answersyour body is
mostly made of incompressible liquid, but air is compressible & changes volume with pressure
changes.
Pressure changes in water for a given ascent or descent are much more substantial than the
same distance ascent or descent in air because water weighs more. - Correct AnswersTrue
The 3 major air spaces affected by pressure when you descend are: - Correct Answersmask,
ears, & sinuses
A squeeze is: - Correct Answersa pressure imbalance in which pressure outside an air space
exceeds pressure inside an air space, resulting in pain or discomfort.
Equalization is adding air to an air space as you descend so the pressure in an air space equals
the surrounding water pressure. - Correct AnswersTrue
Which are techniques for equalizing your ears? - Correct Answers-Pinching your nose and blow
gently against it.
- Swallow and wiggle your jaw from side to side
You want to equalize your ears: - Correct Answersevery metro/few feet before you feel
discomfort
If you feel discomfort and can't equalize, ascend until you relieve the discomfort and try again.
Don't be forceful in equalizing. If you can't equalize, discontinue the dive. - Correct AnswersTrue
The most important rule in scuba diving is: Breathe continuously and never hold your breath. -
Correct AnswersTrue
Ascending while holding your breath: - Correct Answers-can cause lung over expansion injuries
-can cause serious injuries, including paralysis and death
, -causes injuries that are easy to by not holding your breath
A reverse block is: - Correct Answerspain and discomfort caused by expanding air trapped
inside and air space during ascent.
If you feel discomfort during ascent due to a reverse block, you should: - Correct Answersslow
or stop your ascent and give the trapped air time to work its way out.
As you go deeper, you consume air from your scuba cylinder: - Correct Answersfaster
The most efficient method for breathing underwater is rapid and shallow. - Correct
AnswersFalse
You need a mask to see underwater because: - Correct Answersthe human eye can't focus in
water
A mask needs to enclose your nose: - Correct Answersso you can equalize the mask
The features you look for in a mask include: - Correct Answerslow profile, nose or finger
pockets, wide vision field.
The most important factors when buying a mask (and other dive gear) are: - Correct Answersfit
& comfort
To prepare a new mask for use: - Correct Answers-scrub off the protective film left from
manufacturing
-adjust the strap
Maintenance for your mask (and most dive gear) includes: - Correct Answersrinsing in fresh
cold water after use
storing in a cool, dry place
You need a snorkel when scuba diving: - Correct Answers-to conserve air while swimming or
resting at the surface
-to make it easier to breathe when the surface is a bit rough
-in case you have a long swim with an empty cylinder
As easy breathing snorkel has which features? - Correct Answers-large bone
-smooth, rounded bends
A properly adjusted snorkel: - Correct Answers-remains in your mouth with a relaxed jaw
-sits on the left side of your mask
Fins helo you move more effectively by letting you use your leg muscles to swim - Correct
AnswersTrue
What type of fin do you normally wear with wet suit boots? - Correct Answersadjustable strap
fins
Which of the following are blade design features that enhance fin performance? - Correct
Answers-vents
