PADI, Open Water Diver, Final Exam Review
Study online at https://quizlet.com/_8jzt0q
1) If an object is neutrally buoyant (does
not sink or float) in fresh water, the same
object placed into salt water would
D
A sink.
B either sink or float.
C do nothing.
D float.
2) I blow up a balloon, tie it off, and take
it to the bottom of the swimming pool.
What will happen to the balloon and the
air inside it?
A The balloon will get bigger and the
air inside the balloon will be less dense
(molecules move further apart). B
B The balloon will get smaller and the
air inside the balloon will be more dense
(molecules move closer together).
C The balloon will get bigger and the air
inside the balloon will be more dense.
D The balloon will get smaller and the air
inside the balloon will be less dense.
3) I turn a glass upside down, trap the
air in it by putting it in water, and then I
take the glass down to 10 meters. The air
space would
A become half the size it was at the
A
surface.
B not change in size.
C become 1/3 the size it was at the sur-
face.
D become 2/3 the size it was at the sur-
face.
4) If I am not able to equalize (clear)
my body air spaces, it may be because I
have
, PADI, Open Water Diver, Final Exam Review
Study online at https://quizlet.com/_8jzt0q
A seasickness.
B heart disease and high blood pressure.
C
C a cold, allergy or another medical prob-
lem.
D anxiety.
5) If my ears or sinuses hurt while I
am descending (going down), it usually
means
A my air spaces are equalized. C
B my mask strap is too tight.
C I am feeling a squeeze and need to
equalize.
D my mask is too small.
6) The best place for me to position an
alternate air source is
A loose by my side so I can find it fast.
B in the triangle area formed by my chin B
and the lower corners of my rib cage.
C to the base of my cylinder.
D to the back of my BCD between my
shoulder blades and waist.
7) Lung overexpansion injuries can be
caused by
A scuba diving without a buddy.
B continuing a dive when not properly D
weighted.
C not drinking enough water before scu-
ba diving.
D holding my breath while scuba diving.
8) If my cylinder of air lasts 60 minutes
while I am at the surface breathing nor-
mally, assuming all else is the same, how
long will it last at 20 meters breathing
normally?
, PADI, Open Water Diver, Final Exam Review
Study online at https://quizlet.com/_8jzt0q
A 60 minutes
B 20 minutes B
C 15 minutes
D 12 minutes
9) How often should I take my scuba
cylinder to be visually inspected by my
dive center?
A
A Once a year.
B Once every two years.
C Every six months.
D Every five years.
10) The difference between DIN valves
and yoke valves is that DIN valves
A are made from durable plastic.
B contain a spring-operated shutoff valve D
that is held open by cylinder pressure.
C have an o-ring in them.
D have threaded openings to screw the
regulator into.
11) Which of the following is part of prop-
er care for my scuba cylinder?
A Sand and repaint it every year. C
B Dry it in the sun.
C Keep some air in it.
D Have it pressure tested every month.
12) Refer to the regulator picture. Each
regulator part has a number next to it.
1. regulator first stage, 2. regula-
Please choose the correct number for
tor second stage, 3. alternate air
the choices below.
source second stage, 4. instrument con-
sole/gauges/computer, 5. low pressure
regulator first stage,
inflator hose for the BCD
regulator second stage
alternate air source second stage
Study online at https://quizlet.com/_8jzt0q
1) If an object is neutrally buoyant (does
not sink or float) in fresh water, the same
object placed into salt water would
D
A sink.
B either sink or float.
C do nothing.
D float.
2) I blow up a balloon, tie it off, and take
it to the bottom of the swimming pool.
What will happen to the balloon and the
air inside it?
A The balloon will get bigger and the
air inside the balloon will be less dense
(molecules move further apart). B
B The balloon will get smaller and the
air inside the balloon will be more dense
(molecules move closer together).
C The balloon will get bigger and the air
inside the balloon will be more dense.
D The balloon will get smaller and the air
inside the balloon will be less dense.
3) I turn a glass upside down, trap the
air in it by putting it in water, and then I
take the glass down to 10 meters. The air
space would
A become half the size it was at the
A
surface.
B not change in size.
C become 1/3 the size it was at the sur-
face.
D become 2/3 the size it was at the sur-
face.
4) If I am not able to equalize (clear)
my body air spaces, it may be because I
have
, PADI, Open Water Diver, Final Exam Review
Study online at https://quizlet.com/_8jzt0q
A seasickness.
B heart disease and high blood pressure.
C
C a cold, allergy or another medical prob-
lem.
D anxiety.
5) If my ears or sinuses hurt while I
am descending (going down), it usually
means
A my air spaces are equalized. C
B my mask strap is too tight.
C I am feeling a squeeze and need to
equalize.
D my mask is too small.
6) The best place for me to position an
alternate air source is
A loose by my side so I can find it fast.
B in the triangle area formed by my chin B
and the lower corners of my rib cage.
C to the base of my cylinder.
D to the back of my BCD between my
shoulder blades and waist.
7) Lung overexpansion injuries can be
caused by
A scuba diving without a buddy.
B continuing a dive when not properly D
weighted.
C not drinking enough water before scu-
ba diving.
D holding my breath while scuba diving.
8) If my cylinder of air lasts 60 minutes
while I am at the surface breathing nor-
mally, assuming all else is the same, how
long will it last at 20 meters breathing
normally?
, PADI, Open Water Diver, Final Exam Review
Study online at https://quizlet.com/_8jzt0q
A 60 minutes
B 20 minutes B
C 15 minutes
D 12 minutes
9) How often should I take my scuba
cylinder to be visually inspected by my
dive center?
A
A Once a year.
B Once every two years.
C Every six months.
D Every five years.
10) The difference between DIN valves
and yoke valves is that DIN valves
A are made from durable plastic.
B contain a spring-operated shutoff valve D
that is held open by cylinder pressure.
C have an o-ring in them.
D have threaded openings to screw the
regulator into.
11) Which of the following is part of prop-
er care for my scuba cylinder?
A Sand and repaint it every year. C
B Dry it in the sun.
C Keep some air in it.
D Have it pressure tested every month.
12) Refer to the regulator picture. Each
regulator part has a number next to it.
1. regulator first stage, 2. regula-
Please choose the correct number for
tor second stage, 3. alternate air
the choices below.
source second stage, 4. instrument con-
sole/gauges/computer, 5. low pressure
regulator first stage,
inflator hose for the BCD
regulator second stage
alternate air source second stage
