PADI OPEN WATER EXAM PREP
TEST BANK 2026 COMPLETE
PRACTICE SOLUTION TESTED
QUESTIONS
◉ 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 metres/33 feet. 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 metres/33 feet, the pressure is 2 bar/ata. 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.
B in the triangle area formed by my chin 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.. Answer: B In the triangle area formed by my chin and
the lower corners of my rib cage.
Your alternate air source attaches with a quick release in the
triangle area formed by your chin and the lower corners of your
rib cage. Avoid letting your alternate air source dangle
unsecured from your kit. See Equipment I - Regulators.
◉ 7: Lung overexpansion injuries can be caused by
A scuba diving without a buddy.
B continuing a dive when not properly weighted.
C not drinking enough water before scuba diving.
D holding my breath while scuba diving.. Answer: D Holding
my breath while scuba diving.
TEST BANK 2026 COMPLETE
PRACTICE SOLUTION TESTED
QUESTIONS
◉ 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 metres/33 feet. 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 metres/33 feet, the pressure is 2 bar/ata. 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.
B in the triangle area formed by my chin 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.. Answer: B In the triangle area formed by my chin and
the lower corners of my rib cage.
Your alternate air source attaches with a quick release in the
triangle area formed by your chin and the lower corners of your
rib cage. Avoid letting your alternate air source dangle
unsecured from your kit. See Equipment I - Regulators.
◉ 7: Lung overexpansion injuries can be caused by
A scuba diving without a buddy.
B continuing a dive when not properly weighted.
C not drinking enough water before scuba diving.
D holding my breath while scuba diving.. Answer: D Holding
my breath while scuba diving.
