2025 PADI OPEN WATER DIVER
CERTIFICATION TEST WITH 400 EXAM
REVIEW QUESTIONS AND CORRECT ANSWERS
(100% CORRECT VERIFIED ANSWERS)
PADI courses are performance-based. This means that to be certified, I must
________ - ANSWER-meet specific performance requirements.
If my cylinder of air lasts 60 minutes while I am at the surface breathing normally,
assuming all else is the same, how long will it last at 20 m/66 ft breathing
normally? - ANSWER-20 minutes
A group of Advanced Open Water Divers plans to make two dives. The first dive
is on a reef in 22 metres/80 feet of water for 20 minutes. The group then remains
on the surface for 1 hour. The second dive is on a wreck in 18 metres/60 feet of
water, with a planned bottom time of 30 minutes. What will be the ending pressure
group after the second dive? - ANSWER-R
My buddy and I are planning to dive at a site where the water and air temperature
are near freezing. We plan to dive to 18 metres/60 for 30 minutes. What dive
profile would we use when planning our dive? - ANSWER-22 metres/70 feet for
30 minutes
I am an Advanced Open Water Diver. I plan to do three dives. The first dive is a
25-metre/80-foot dive for 22 minutes followed by a 52-minute surface interval.
The second dive is to 20 metres/70 feet for 27 minutes followed by a surface
interval of 62 minutes. My third dive is to 18 metres/60 feet. What would be my
maximum allowable bottom time for this third dive? - ANSWER-34 minutes
pg. 1
,Failure to complete assigned independent study can create significant delays, and
my instructor may have to cancel and reschedule sessions until I complete the
assignment.
a. True
b. False - ANSWER-a. True
While diving in a new dive environment, two benefits of seeking an orientation,
supervision and/or additional training are that it helps me avoid problems and that
it helps me enjoy the dive more.
a. True
b. False - ANSWER-a. True
As you descend in water the pressure ________ - ANSWER-increases
A depth of 10 metres/33 feet causes a pressure change of ________. - ANSWER-1
bar/ata
As a new PADI Open Water Diver, I was trained to a maximum depth of
________ (or the actual depth I reached, if shallower). - ANSWER-18 meters/60
feet
A diver who was unresponsive underwater has become fully responsive, is fully
alert and shows no apparent further problems. The diver still requires medical
examination.
a. True
b. False - ANSWER-a. True
After a dive, a diver has numbness, tingling and weakness in the arms. Are these
possible signs/symptoms of DCS? - ANSWER-yes
pg. 2
,Underwater navigation helps me save air and can help me get to an exit point the
shortest way if I have a problem.
a. True
b. False - ANSWER-a. True
After a dive, my buddy feels ill and has cherry red lips and nail beds. After
breathing oxygen, my buddy seems to be doing fine, so no other action is required.
a. True
b. False - ANSWER-b. False
The diver should have medical attention in all cases of suspected contaminated air
Certain medical conditions can be hazardous while diving, so it is important to
answer all questions on the Medical Statement honestly and completely.
a. True
b. False - ANSWER-a. True
If an object is neutrally buoyant in fresh water, the same object placed into salt
water would... - ANSWER-Float
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? - ANSWER-The balloon will
get smaller and the air inside the balloon will be more dense
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 m/33 ft. The air space would... - ANSWER-Become half the
size it was at the surface
pg. 3
, If I am not able to equalize my body air spaces, it may be because I have... -
ANSWER-A cold, allergy or another medical problem
If my ears or sinuses hurt while I am descending, it usually means... - ANSWER-I
am feeling a squeeze and need to equalize
The best place for me to position an alternate air source is... - ANSWER-In the
triangle area formed by my chin and the lower corners of my rib cage
Lung overexpansion injuries can be caused by... - ANSWER-Holding my breath
while scuba diving
How often should I take my scuba cylinder to be visually inspected by my dive
center? - ANSWER-Once a year
The difference between DIN values and yoke valves is that DIN valves... -
ANSWER-Have threaded openings to screw the regulator into
Which of the following is not part of proper care for my scuba cylinder? -
ANSWER-Keep some air in it
Refer to the regulator picture on the right. Each regulator part has a number next to
it. Please choose the correct numeric order from the choices below - ANSWER-1.
Regulator first stage, 2. regulator second stage, 3. alternate air source second stage,
4. low pressure inflator hose for the BCD, 5. instrument console/gauges/computer
When I look at things underwater they often seem _____ than they look on the
surface - ANSWER-Larger and/or nearer
pg. 4
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller muriithikelvin098. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $28.99. You're not tied to anything after your purchase.
