Page | 1
PADI OPEN WATER DIVER CERTIFICATION
EXAM 2025\ 2026 BRAND NEW
QUESTIONS WITH ANSWERS| ACE YOUR
GRADES!
What are 9 signs/symptoms of decompression sickness? - correct
answer -Paralysis, dizziness, tingling, joint and limb pain, shock,
numbness, difficulty breathing, weakness and prolonged fatigue,
unconsciousness and death
When do symptoms of DCS occur? - correct answer -Usually 15
minutes to 12 hours after a dive
How does a dive computer or dive table estimate the amount of
nitrogen I absorb during a dive? - correct answer -By using your
dive time and depth information to calculate the theoretical
amount of nitrogen in your body
What is no stop diving? - correct answer -When you can swim
directly to the surface without unacceptable risk of decompression
sickness
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What is a no stop limit? - correct answer -The maximum time you
can spend at a given depth and still ascend to the surface
What do I have to do if I exceed a no stop limit? - correct answer -
I must make an emergency decompression stop
What is an emergency decompression stop? - correct answer -
Stops at specific depths for prescribed times to allow your body to
release dissolved nitrogen before you ascend further
What is the relationship between depth and my no stop limits? -
correct answer -The deeper you dive, the shorter your no stop
limits
What is the difference between a decompression stop and a
safety stop? - correct answer -Safety stops keep you well within
limits, whereas emergency decompression stops return you from
outside limits
, Page | 3
Why is residual nitrogen important? - correct answer -It shortens
your no stop limits if you make another dive
What is a repetitive dive? - correct answer -A dive made while you
still have residual nitrogen
How do dive tables work? - correct answer -Table 1 assigns a
Pressure Group letter that represents the theoretical amount of
residual nitrogen based on your dive time and depth. Table 2
gives you credit for nitrogen leaving your body during a surface
interval. Table 3 provides reduced no stop times for a repetitive
dive
What is a surface interval? - correct answer -The time you spend
at the surface between dives. During this, the residual nitrogen
declines as it dissolves
How do I be a SAFE diver? - correct answer -You slowly ascend
from every dive
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What is finding a minimum surface interval? - correct answer -
Determining how long to wait after the first dive to have the no
stop time you want at the planned depth of the repetitive dive
What relationship is shown through dive computers? - correct
answer -Depth and no stop time
What are 3 ways I can find a minimum surface interval with a dive
computer without using dive tables? - correct answer -Wait and
check your no stop time until it matches your planned repetitive
dive depth, use the dive computer's plan mode, or use a tablet or
smart phone app
Why is going to a higher altitude after diving a potential issue? -
correct answer -It lowers the pressure around you at the surface,
so dissolved nitrogen in body tissues comes out of solution faster
than at sea level, therefore increasing your risk of DCS
How do you fly or ascend to altitude after diving? - correct answer
-You start and end your dive at sea level, and then go to lower
surface pressure at altitude
PADI OPEN WATER DIVER CERTIFICATION
EXAM 2025\ 2026 BRAND NEW
QUESTIONS WITH ANSWERS| ACE YOUR
GRADES!
What are 9 signs/symptoms of decompression sickness? - correct
answer -Paralysis, dizziness, tingling, joint and limb pain, shock,
numbness, difficulty breathing, weakness and prolonged fatigue,
unconsciousness and death
When do symptoms of DCS occur? - correct answer -Usually 15
minutes to 12 hours after a dive
How does a dive computer or dive table estimate the amount of
nitrogen I absorb during a dive? - correct answer -By using your
dive time and depth information to calculate the theoretical
amount of nitrogen in your body
What is no stop diving? - correct answer -When you can swim
directly to the surface without unacceptable risk of decompression
sickness
, Page | 2
What is a no stop limit? - correct answer -The maximum time you
can spend at a given depth and still ascend to the surface
What do I have to do if I exceed a no stop limit? - correct answer -
I must make an emergency decompression stop
What is an emergency decompression stop? - correct answer -
Stops at specific depths for prescribed times to allow your body to
release dissolved nitrogen before you ascend further
What is the relationship between depth and my no stop limits? -
correct answer -The deeper you dive, the shorter your no stop
limits
What is the difference between a decompression stop and a
safety stop? - correct answer -Safety stops keep you well within
limits, whereas emergency decompression stops return you from
outside limits
, Page | 3
Why is residual nitrogen important? - correct answer -It shortens
your no stop limits if you make another dive
What is a repetitive dive? - correct answer -A dive made while you
still have residual nitrogen
How do dive tables work? - correct answer -Table 1 assigns a
Pressure Group letter that represents the theoretical amount of
residual nitrogen based on your dive time and depth. Table 2
gives you credit for nitrogen leaving your body during a surface
interval. Table 3 provides reduced no stop times for a repetitive
dive
What is a surface interval? - correct answer -The time you spend
at the surface between dives. During this, the residual nitrogen
declines as it dissolves
How do I be a SAFE diver? - correct answer -You slowly ascend
from every dive
, Page | 4
What is finding a minimum surface interval? - correct answer -
Determining how long to wait after the first dive to have the no
stop time you want at the planned depth of the repetitive dive
What relationship is shown through dive computers? - correct
answer -Depth and no stop time
What are 3 ways I can find a minimum surface interval with a dive
computer without using dive tables? - correct answer -Wait and
check your no stop time until it matches your planned repetitive
dive depth, use the dive computer's plan mode, or use a tablet or
smart phone app
Why is going to a higher altitude after diving a potential issue? -
correct answer -It lowers the pressure around you at the surface,
so dissolved nitrogen in body tissues comes out of solution faster
than at sea level, therefore increasing your risk of DCS
How do you fly or ascend to altitude after diving? - correct answer
-You start and end your dive at sea level, and then go to lower
surface pressure at altitude
