PADI, Open Water Diver, Final Exam Review
Study online at https://quizlet.com/_5ir7lh
1. D float. 1) If an object is neutrally buoyant (does not
sink or float) in fresh water, the same object
Salt water is heavier than fresh water be- placed into salt water would
cause it has dissolved minerals in it. This
means it causes more upward force (buoy- A sink.
ancy) on an object. An object that is neu- B either sink or float.
trally buoyant in fresh water would float in C do nothing.
salt water because there is greater upward D float.
force.
See Being a Diver I - Buoyancy and Control-
ling Buoyancy.
2. B The balloon will get smaller and the air 2) I blow up a balloon, tie it off, and take it to
inside the balloon will be more dense (mol- the bottom of the swimming pool. What will
ecules move closer together). happen to the balloon and the air inside it?
As water pressure increases, the volume A The balloon will get bigger and the air
of an air space will decrease. This causes inside the balloon will be less dense (mol-
the density of the air inside to increase andecules move further apart).
air molecules are pushed closer together. B The balloon will get smaller and the air
The balloon would get smaller and the air inside the balloon will be more dense (mol-
density inside would be greater. ecules move closer together).
C The balloon will get bigger and the air
See Being a Diver I - Water Pressure and Air inside the balloon will be more dense.
Volume Effects. 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 sur- 3) I turn a glass upside down, trap the air
face. in it by putting it in water, and then I take
the glass down to 10 meters. The air space
At 10 meters, the pressure is 2 bar. An air would
volume taken to this depth from the sur-
, PADI, Open Water Diver, Final Exam Review
Study online at https://quizlet.com/_5ir7lh
face would decrease and become half the A become half the size it was at the surface.
size. B not change in size.
C become 1/3 the size it was at the surface.
See Being a Diver I - Water Pressure and Air D become 2/3 the size it was at the surface.
Volume Effects.
4. C A cold, allergy or another medical prob- 4) If I am not able to equalize (clear) my body
lem. air spaces, it may be because I have
A cold, or any congestion, can block air A seasickness.
passages in your ears and sinuses, making B heart disease and high blood pressure.
equalization difficult or impossible. C a cold, allergy or another medical prob-
lem.
See Being a Diver I - The Effects of Increas- D anxiety.
ing Pressure on Body Air Spaces.
5. C I am feeling a squeeze and need to equal- 5) If my ears or sinuses hurt while I am
ize. descending (going down), it usually means
Pain in your ears or sinuses means that A my air spaces are equalized.
they aren't equalized. Stop your descent B my mask strap is too tight.
and ascend slightly to relieve pressure on C I am feeling a squeeze and need to equal-
your ears. Then attempt to equalize again. ize.
If you can't equalize, end the dive. D my mask is too small.
See Being a Diver I - The Effects of Increas-
ing Pressure on Body Air Spaces.
6. B In the triangle area formed by my chin 6) The best place for me to position an alter-
and the lower corners of my rib cage. nate air source is
Your alternate air source attaches with a A loose by my side so I can find it fast.
quick release in the triangle area formed B in the triangle area formed by my chin and
by your chin and the lower corners of your
, PADI, Open Water Diver, Final Exam Review
Study online at https://quizlet.com/_5ir7lh
rib cage. Avoid letting your alternate air the lower corners of my rib cage.
source dangle unsecured from your kit. C to the base of my cylinder.
D to the back of my BCD between my shoul-
See Equipment I - Regulators. der blades and waist.
7. D Holding my breath while scuba diving. 7) Lung overexpansion injuries can be
caused by
Blocking off your lungs by holding your
breath and ascending could cause them to A scuba diving without a buddy.
overexpand and rupture, which is a seri- B continuing a dive when not properly
ous injury that could result in paralysis and weighted.
death. Breathing continuously while scuba C not drinking enough water before scuba
diving keeps air passages open allowing diving.
expanding air to escape. D holding my breath while scuba diving.
See Being a Diver I - The Effects of Decreas-
ing Pressure on Body Air Spaces.
8. B 20 minutes 8) If my cylinder of air lasts 60 minutes while
I am at the surface breathing normally, as-
60/3=20 suming all else is the same, how long will it
last at 20 meters breathing normally?
For each 10 meters we go down, we have
one more atmosphere of pressure. Also, A 60 minutes
remember to add in the 1 atmosphere of B 20 minutes
pressure at the surface. C 15 minutes
D 12 minutes
So, going down to 20 meters, we will have
2 atm + 1 atm = 3 atm of pressure.
9. A Once a year. 9) How often should I take my scuba cylinder
to be visually inspected by my dive center?
Have your cylinder visually inspected an-
nually for internal corrosion or other cont- A Once a year.
Study online at https://quizlet.com/_5ir7lh
1. D float. 1) If an object is neutrally buoyant (does not
sink or float) in fresh water, the same object
Salt water is heavier than fresh water be- placed into salt water would
cause it has dissolved minerals in it. This
means it causes more upward force (buoy- A sink.
ancy) on an object. An object that is neu- B either sink or float.
trally buoyant in fresh water would float in C do nothing.
salt water because there is greater upward D float.
force.
See Being a Diver I - Buoyancy and Control-
ling Buoyancy.
2. B The balloon will get smaller and the air 2) I blow up a balloon, tie it off, and take it to
inside the balloon will be more dense (mol- the bottom of the swimming pool. What will
ecules move closer together). happen to the balloon and the air inside it?
As water pressure increases, the volume A The balloon will get bigger and the air
of an air space will decrease. This causes inside the balloon will be less dense (mol-
the density of the air inside to increase andecules move further apart).
air molecules are pushed closer together. B The balloon will get smaller and the air
The balloon would get smaller and the air inside the balloon will be more dense (mol-
density inside would be greater. ecules move closer together).
C The balloon will get bigger and the air
See Being a Diver I - Water Pressure and Air inside the balloon will be more dense.
Volume Effects. 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 sur- 3) I turn a glass upside down, trap the air
face. in it by putting it in water, and then I take
the glass down to 10 meters. The air space
At 10 meters, the pressure is 2 bar. An air would
volume taken to this depth from the sur-
, PADI, Open Water Diver, Final Exam Review
Study online at https://quizlet.com/_5ir7lh
face would decrease and become half the A become half the size it was at the surface.
size. B not change in size.
C become 1/3 the size it was at the surface.
See Being a Diver I - Water Pressure and Air D become 2/3 the size it was at the surface.
Volume Effects.
4. C A cold, allergy or another medical prob- 4) If I am not able to equalize (clear) my body
lem. air spaces, it may be because I have
A cold, or any congestion, can block air A seasickness.
passages in your ears and sinuses, making B heart disease and high blood pressure.
equalization difficult or impossible. C a cold, allergy or another medical prob-
lem.
See Being a Diver I - The Effects of Increas- D anxiety.
ing Pressure on Body Air Spaces.
5. C I am feeling a squeeze and need to equal- 5) If my ears or sinuses hurt while I am
ize. descending (going down), it usually means
Pain in your ears or sinuses means that A my air spaces are equalized.
they aren't equalized. Stop your descent B my mask strap is too tight.
and ascend slightly to relieve pressure on C I am feeling a squeeze and need to equal-
your ears. Then attempt to equalize again. ize.
If you can't equalize, end the dive. D my mask is too small.
See Being a Diver I - The Effects of Increas-
ing Pressure on Body Air Spaces.
6. B In the triangle area formed by my chin 6) The best place for me to position an alter-
and the lower corners of my rib cage. nate air source is
Your alternate air source attaches with a A loose by my side so I can find it fast.
quick release in the triangle area formed B in the triangle area formed by my chin and
by your chin and the lower corners of your
, PADI, Open Water Diver, Final Exam Review
Study online at https://quizlet.com/_5ir7lh
rib cage. Avoid letting your alternate air the lower corners of my rib cage.
source dangle unsecured from your kit. C to the base of my cylinder.
D to the back of my BCD between my shoul-
See Equipment I - Regulators. der blades and waist.
7. D Holding my breath while scuba diving. 7) Lung overexpansion injuries can be
caused by
Blocking off your lungs by holding your
breath and ascending could cause them to A scuba diving without a buddy.
overexpand and rupture, which is a seri- B continuing a dive when not properly
ous injury that could result in paralysis and weighted.
death. Breathing continuously while scuba C not drinking enough water before scuba
diving keeps air passages open allowing diving.
expanding air to escape. D holding my breath while scuba diving.
See Being a Diver I - The Effects of Decreas-
ing Pressure on Body Air Spaces.
8. B 20 minutes 8) If my cylinder of air lasts 60 minutes while
I am at the surface breathing normally, as-
60/3=20 suming all else is the same, how long will it
last at 20 meters breathing normally?
For each 10 meters we go down, we have
one more atmosphere of pressure. Also, A 60 minutes
remember to add in the 1 atmosphere of B 20 minutes
pressure at the surface. C 15 minutes
D 12 minutes
So, going down to 20 meters, we will have
2 atm + 1 atm = 3 atm of pressure.
9. A Once a year. 9) How often should I take my scuba cylinder
to be visually inspected by my dive center?
Have your cylinder visually inspected an-
nually for internal corrosion or other cont- A Once a year.
