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NAUI Open Water eLearning Exam Prep
(New 2024/ 2025 Update) Questions and
Verified Answers| 100% Correct| A Grade
QUESTION
it is recommended that a dive team from an anchored boat have Answer: a trail line 30 meters long with a buoy at the end
QUESTION
it is advisable that a sport/recreational diver Answer: avoid decompression dives
QUESTION
If you are diving wearing an exposure suit, you should _____ to safely control buoyancy as you descend. Answer: add air to your buoyancy device
QUESTION
If your dive buddy complains to you about having aching pain in his/her shoulder one hour after the dive, you might suspect: Answer: decompression sickness
QUESTION
When buying or renting equipment for diving, the most important consideration is: Answer: its fit on your body
QUESTION
sea water weighs _______ kg per liter or ______ pounds per cubic foot Answer: 1.025 / 64.
QUESTION
it is recommended that a dive team diving from an anchored boat begin their dive Answer: against the prevailing current
QUESTION
For optimum no-decompression bottom times, plan repetitive dives so that each successive dive is to _________ depth. Answer: a shallower
QUESTION
To prevent air embolism, a diver should: Answer: Breathe normally at all times during ascent and never hold his/her breath
Answer: sinus squeeze
QUESTION
according to the NAUI dive tables dives to less than 6m (20ft) Answer: are considered as 6m (20 foot) dives
QUESTION
Because of refraction, objects underwater appear _________ and _________ when the diver is looking through his/her mask. Answer: larger; closer
QUESTION
When planning and executing a dive, it is important for diving buddies to: Answer: agree on a dive leader
QUESTION
snorklers over 15 inches in length are no recommended primarily because Answer: they have too much dead air space
QUESTION
which of the following will help prevent seasickness Answer: settle yourself in a midway point of the boat
QUESTION
The first color lost in the spectrum upon descent during a dive is _____. Answer: red
QUESTION
a regular breathing pattern while diving would be Answer: slightly slower and deeper than you normally breathe
QUESTION
If a diver's surface air consumption rate is 1.72bar (25 psi) per minute, what would be the consumption rate at 20 meters (66 feet) of seawater? Answer: 5.16 bar per minute (75 psi per minute)
QUESTION
appropriate first aid measures for an unconscious scuba diver should include consideration of Answer: drowning, air embolism, and decompression sickness
QUESTION
the ______ line is the direction of travel line on the compass Answer: lubber
QUESTION
which of the following most readily provides assistance to a diver Answer: the diving buddy
QUESTION
examples of natural navigation aids divers may use during dives include Answer: all of the above/following; ripple marks in the sand, sun brightness, and bottom contours
QUESTION
If it is suspected that the air in a tank is contaminated due to its smell or taste: Answer: do not use the tank and immediately call the dive shop that filled the tank so they can investigate the problem
QUESTION
Which of the following physical factors can make you incapable of sustaining the efforts sometimes demanded when participating in recreational diving Answer:
all of the above/following; inadequate sleep, a recent head cold and recent ingestion of drugs (medicine, alcohol, narcotics)
QUESTION
Physical fitness is an important consideration for scuba divers because it helps to prevent diving accidents due to Answer: exhaustion
QUESTION
which is the most effective way to descend while maintaining orientation and attempting equalization of the ears Answer: feet first
QUESTION
you should have your regulator serviced by a certified repair technician Answer: as recommended by the manufacturer
QUESTION
A symptom of carbon monoxide poisoning is often: Answer: headache
QUESTION
QUESTION
two types of materials that scuba tanks are made from are steel and ________________ Answer: aluminum
QUESTION
If during a dive you and your buddy become separated, you should: Answer: spend no more than one minute looking then surface
QUESTION
when selecting a face mask, the most important thing to consider is Answer: proper seal and fit
QUESTION
Completing this entry level scuba certification course makes you knowledgeable and skillful enough to dive safely in or at: Answer: open water with conditions similar to those in which you were trained
QUESTION
The primary purpose of the exposure suit is to: Answer: Preserve body heat during dives
QUESTION
currents that suddenly appear and disappear are __________ and __________ is the underwater movement of water caused by wave action that you will experience when diving in areas close to shore Answer: transitory; surge
QUESTION
Immediately upon reaching the dive site, you should Answer: observe conditions
QUESTION
A sealed balloon filled with air that has a volume of 6 cubic inches at 99 feet will have a volume of _____ cubic inches at 33 feet. Answer: 12
QUESTION
A diver on the surface waving his/her hand overhead and thrashing violently indicates: Answer: distress
QUESTION
QUESTION
an irregular breathing pattern while diving will possibly cause Answer: carbon dioxide excess
QUESTION
which gas law best explains diving medical problems such as ear and sinus squeeze Answer: boyle's law
QUESTION
which of the following limits should be established prior to every scuba dive Answer: maximum bottom time, maximum depth, minimum air pressure
QUESTION
The minimum surface interval recommended between two dives is _________ minutes. Answer: 60
QUESTION
what type of pressure is defined as gauge (water) pressure plus atmospheric (air) pressure Answer: absolute
QUESTION
Breathing dry air, a scuba diver tends to become dehydrated while diving due to: Answer: Moisturizing dry inhaled air
QUESTION
most surface waves are caused by Answer: wind
QUESTION
The predictable daily rise and fall of the ocean at a single point is called: Answer: the tide
QUESTION
the preferred action to take if you find yourself alone and out of air at 30 feet in open water is Answer: emergency swimming ascent
QUESTION
Pressure in the middle ear is equalized through a part of the body called the: Answer: eustachian tube
plan your dive, dive your plan
QUESTION
Lung expansion injuries Answer: Subcutaneous emphysema, mediastinal emphysema, pneumothorax, arterial gas embolism
QUESTION
What is a half stop? Answer: A safety stop during ascent
QUESTION
Bubbles in neck is a symptom if what lung expansion injury? Answer: Subcutaneous emphysema
QUESTION
What color are your lips during carbon monoxide poisoning? Answer: Pinkisk/Red Lips
QUESTION
What is the hose pressure of the 2nd stage regulator?
Answer: 150 psi
QUESTION
How to storage a cylinder? Answer: Stored upright and secured
QUESTION
2 uses of dive knife Answer: cut yourself loose and bang on tank/make noise for attention
QUESTION
sharks are Answer: unpredictable
QUESTION
How should you swim? Answer: Parallel to shore
QUESTION
How often should a scuba tank get hydrostatically tested?
Answer: demand regulator; inhale(?)
QUESTION
What does a regulator regulate? Answer: pressure
QUESTION
To render first aid for venomous fish wounds: Answer: Flush the wound to clean, soak in hot water, obtain medical attention.
QUESTION
Marine wounds are Answer: more prone to infection
QUESTION
Treatment of stingray sting Answer: remove spine and immerse in hot water
QUESTION
When should a tourniquet be used? Answer: Only as a last resort
QUESTION
What is a pneuomothorax? Answer: air in the pleural space of lung/ collapsed lung
QUESTION
Skipped breathing leads to Answer: lung overexpansion (?)
QUESTION
3 main causes of currents Answer: wind, tides, gravity
QUESTION
4 advantages of strapback fins Answer: still have boots on out of water for walking, stays on feet better, better for keeping feet warmer in cold weather, more powerful blade
