SCUBA NAUI EXAM QUESTIONS AND
ANSWERS UPDATED (2024/2025)
(VERIFIED ANSWERS)
What is the name of the organization to contact in an emergency? - ANS
✓DAN (diver's alert network)
The absolute atmospheric pressure at a given depth is calculated by what? -
ANS ✓add the gauge (water) pressure and the atmospheric (air) pressure
together
What is the absolute atmospheric pressure at a depth of 165 feet - ANS ✓6
atmosphere
(1 ATM from air plus 5 ATM from water = 6 ATM)
Why does a mask squeeze happen? - ANS ✓Because the diver does not
equalize the air space in their mask while descending
What gas law would represent a mask squeeze? - ANS ✓Boyle's Law
What should you be doing early and often and immediately when
submerging? - ANS ✓Equalizing your ears
The symptoms of being drunk under water is due to which gas? - ANS
✓Nitrogen
Nitrogen narcosis - ANS ✓- a physiological condition caused by an increased
partial pressure of nitrogen, resulting in symptoms similar to those of
intoxication
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- happens around 80 feet; at 80ft feels like you've had 1 drink, at 100ft feels like
you've had 2 drinks; every 10 ft after that feels like you have another drink
How do you prevent nitrogen narcosis or getting "narced"? - ANS ✓just go
up
You are submerged at a depth of 20 feet and are being pushed back and
forth in the water (not up and down). What is this called? - ANS ✓Transitory
current
T/F: When ascending, holding your breath is a good idea - ANS ✓False
How do you prevent an air embolism? - ANS ✓Breathe normally and do NOT
hold your breath
What are 5 environmental and/or physiological factors that can increase
the risk fo DCS (decompression sickness)? - ANS ✓1. Obesity
2. Age
3. Being cold
4. Dehydration
5. Being a smoker
What are the symptoms of DCS that can occur up to 24 hrs after diving? -
ANS ✓pain/stiffness in joints, body rash (aka bubbles under the skin), numbness,
and paralysis
List some factors that can impact air consumption - ANS ✓- Pressure
- Your activity level during the dive
- Your mental state
- Your body size
- The warmth of your diving suit
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SCUBA
- Your level of physical fitness
T/F: If your buddy is nowhere to be seen, you should continue your dive -
ANS ✓False
What should you do if you dive buddy become separated? - ANS ✓Get
vertical in the water and look in all directions for your buddy/their bubbles. If in
low visibility water, return to where you last saw your buddy and begin
searching there. Then rise about 10 feet to look for buddy/bubbles if you did not
see them. After a minute of searching ascend slowly to the surface turning as you
ascend to continue looking for them. Once at the surface, note your position
relative to two points on the shore, and wait for your buddy. If you are diving
where help is available to assist you in a search for a lost buddy, signal for help if
your buddy does not surface within 5 min → will have to contact and guide the
help
What is the name of the body part/tube you equalize your ears through? -
ANS ✓Eustachian tube
T/F: Blue is the first color that is diffused as you descend into the water -
ANS ✓False - the correct answer is red
Rebreathers are a closed circuit apparatus, meaning that the exhaled air is
recycled, scrubbed and o2 is added back to the inhaled air, we are using
______ circuit SCUBA units- that means we are always breathing the
compressed air that is in our tanks - ANS ✓demand/open
You are done diving and you are rinsing you gear. After you drain and dress
your BCD, you are going to rinse your regulator. What are 2 important
things that you need to do/or not do while rinsing/dunking the first and
second stages. - ANS ✓1. Put the dust cap back in place before rinsing
2. Press the button on the regular after rinsing, not during
What is the partial pressure of nitrogen at 99 feet. Show math - ANS ✓99 ft =
4 ATM = 60 PSI
SCUBA NAUI
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