PADI, Open Water Diver, Final Exam Review
Updated Questions and Verified Answers,
100% Guarantee Pass
1. 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.
Answer> 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.
2. 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.
Answer> 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.
3. 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.
Answer> 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.
, 4. 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.
Answer> 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.
5. 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.
Updated Questions and Verified Answers,
100% Guarantee Pass
1. 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.
Answer> 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.
2. 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.
Answer> 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.
3. 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.
Answer> 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.
, 4. 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.
Answer> 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.
5. 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.
