PADI OPEN WATER DIVER, FINAL EXAM QUESTIONS WITH
COMPLETE SOLUTIONS GUARANTEED PASS BRAND NEW
2025
1) If an object is neutrally buoyant (does not sink or float)
in fresh water, the same object placed into salt water
would
A sink.
B either sink or float.
C do nothing.
D float. - ANSWER - >D float.
Salt water is heavier than fresh water because it has
dissolved minerals in it. This means it causes more
upward force (buoyancy) on an object. An object that is
neutrally buoyant in fresh water would float in salt water
because there is greater upward force.
See Being a Diver I - Buoyancy and Controlling Buoyancy.
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 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. - ANSWER - >B The balloon will
get smaller and the air inside the balloon will be more
dense (molecules move closer together).
As water pressure increases, the volume of an air space
will decrease. This causes the density of the air inside to
increase and air molecules are pushed closer together.
The balloon would get smaller and the air density inside
would be greater.
See Being a Diver I - Water Pressure and Air Volume
Effects.
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 surface.
B not change in size.
C become 1/3 the size it was at the surface.
D become 2/3 the size it was at the surface. - ANSWER -
>A become half the size it was at the surface.
At 10 meters, the pressure is 2 bar. An air volume taken
to this depth from the surface would decrease and
become half the size.
See Being a Diver I - Water Pressure and Air Volume
Effects.
4) If I am not able to equalize (clear) my body air spaces,
it may be because I have
A seasickness.
B heart disease and high blood pressure.
C a cold, allergy or another medical problem.
D anxiety. - ANSWER - >C A cold, allergy or another
medical problem.
A cold, or any congestion, can block air passages in your
ears and sinuses, making equalization difficult or
impossible.
, See Being a Diver I - The Effects of Increasing Pressure on
Body Air Spaces.
5) If my ears or sinuses hurt while I am descending (going
down), it usually means
A my air spaces are equalized.
B my mask strap is too tight.
C I am feeling a squeeze and need to equalize.
D my mask is too small. - ANSWER - >C I am feeling a
squeeze and need to equalize.
Pain in your ears or sinuses means that they aren't
equalized. Stop your descent and ascend slightly to
relieve pressure on your ears. Then attempt to equalize
again. If you can't equalize, end the dive.
See Being a Diver I - The Effects of Increasing Pressure on
Body Air Spaces.
6) The best place for me to position an alternate air
source is
A loose by my side so I can find it fast.
COMPLETE SOLUTIONS GUARANTEED PASS BRAND NEW
2025
1) If an object is neutrally buoyant (does not sink or float)
in fresh water, the same object placed into salt water
would
A sink.
B either sink or float.
C do nothing.
D float. - ANSWER - >D float.
Salt water is heavier than fresh water because it has
dissolved minerals in it. This means it causes more
upward force (buoyancy) on an object. An object that is
neutrally buoyant in fresh water would float in salt water
because there is greater upward force.
See Being a Diver I - Buoyancy and Controlling Buoyancy.
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 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. - ANSWER - >B The balloon will
get smaller and the air inside the balloon will be more
dense (molecules move closer together).
As water pressure increases, the volume of an air space
will decrease. This causes the density of the air inside to
increase and air molecules are pushed closer together.
The balloon would get smaller and the air density inside
would be greater.
See Being a Diver I - Water Pressure and Air Volume
Effects.
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 surface.
B not change in size.
C become 1/3 the size it was at the surface.
D become 2/3 the size it was at the surface. - ANSWER -
>A become half the size it was at the surface.
At 10 meters, the pressure is 2 bar. An air volume taken
to this depth from the surface would decrease and
become half the size.
See Being a Diver I - Water Pressure and Air Volume
Effects.
4) If I am not able to equalize (clear) my body air spaces,
it may be because I have
A seasickness.
B heart disease and high blood pressure.
C a cold, allergy or another medical problem.
D anxiety. - ANSWER - >C A cold, allergy or another
medical problem.
A cold, or any congestion, can block air passages in your
ears and sinuses, making equalization difficult or
impossible.
, See Being a Diver I - The Effects of Increasing Pressure on
Body Air Spaces.
5) If my ears or sinuses hurt while I am descending (going
down), it usually means
A my air spaces are equalized.
B my mask strap is too tight.
C I am feeling a squeeze and need to equalize.
D my mask is too small. - ANSWER - >C I am feeling a
squeeze and need to equalize.
Pain in your ears or sinuses means that they aren't
equalized. Stop your descent and ascend slightly to
relieve pressure on your ears. Then attempt to equalize
again. If you can't equalize, end the dive.
See Being a Diver I - The Effects of Increasing Pressure on
Body Air Spaces.
6) The best place for me to position an alternate air
source is
A loose by my side so I can find it fast.
