NAUI – – Flashcard
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When selecting a face mask the most important things to consider our proper ____ and _____
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Fit and comfort
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Snorkels over 15 inches in length are not recommended primarily because_______
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They have too much dead air space
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When buying or renting equipment for diving, the most important consideration is _______ on your body
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Fit
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When rinsing a regulator it is best to leave the regulator ______to the tank or have the dust cap_____
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Attached, closed
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Diving equipment should be _____ thoroughly, ____, and _____ in a cool place
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Rinsed, dried, stored
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Scuba tank should always have some pressure on them to prevent ______from entering
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Water / moisture
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According to the DOT regulations, scuba tanks must be hydrostatically tested every ______ years
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5
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Open heel fins are usually the fins of choice for scuba divers because____
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They can be used in a wide variety of conditions
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The primary purpose of the exposure suit is to preserve ______ during Dives
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Body heat
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Weighting systems are used by the diver primarily to offset the ______ buoyancy created by the wetsuit
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Positive
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You should have your regulator serviced by a certified repair technician at least _____ per year
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One time
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The stage of the regulator which reduces the tank pressure is the ______stage
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First
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Two types of material that scuba tanks are made of our Steel and _____
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Aluminum
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The ______ line is the direction of travel line on the compass
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Lubber
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The dive knife is used primarily as a _____ for digging, cutting, pounding and prying
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Tool
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Stamped, engraved, markings on scuba tanks include date of _____, serial number and type of blank
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hydrostatic testing, material (A= aluminum, AA = steel)
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Atmospheric pressure at sea level is _____ pounds per square inch for _____ atmosphere absolute
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14.7 pounds, 1 atmosphere
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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
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12
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Sea waterways ____ pounds per cubic foot
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64.1
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The gas law that best explains diving medical problems such as ear and sinus squeeze is
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Boyle's Law
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Because refractions, objects underwater appear ____ and ______ when the diver is looking through his / her mask
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Larger, closer
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When the pressure of nitrogen is balanced between the air in your body you are at a state of ______
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Equilibrium
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A diver's body heat is lost through conduction at a rate of approximately _____ times more rapidly than in air
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25 times
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The type of pressure defined as gauge for water pressure plus atmospheric pressure is ______
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Absolute pressure
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The absolute pressure in the ocean at 53 feet is ______ atmospheres absolute
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2.61
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If a divers Surface air consumption rate is 25 psi per minute, what would be the consumption rate at 66 feet of seawater
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75 PSI / minute
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A depth that is equivalent to one atmosphere in the ocean is equal to _____ feet in the seawater and _____feet in freshwater
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33 seawater, 34 freshwater
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Two methods of measuring air pressure are BAR or _____
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Pounds per square inch
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Sound travels about ______ times faster in water than in air
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4
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The first color lost in the spectrum upon descent during a dive is _____
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Red
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Pressure in the middle ear is equalizer a part of the body called the ______
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Eustachian
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Breathing dry air, a scuba diver tends to become dehydrated while diving do to _____ dry
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Moisturizing or humidifying
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Symptoms of nitrogen Narcosis are similar to _____
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Alcohol intoxication
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Divers inability to equalize his/ her ears during offense could cause a ____ or reverse ______
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Block, block
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An irregular breathing pattern while diving could possibly cause _____ excess
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Carbon dioxide / CO2
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Generally, for maximum efficiency your breathing should be slightly ____ and _____ than you normally breathe
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Slower, deeper
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To prevent an air embolism, a diver should breathe ____ at all times during ascent and never ____ his slash her _____
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Normally, hold, breath
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A diver with blood and mucus in his / her mask upon surfacing will most likely have a _____
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Sinus squeeze
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If your dive buddy complains to you about having aching pain in his or her shoulder one hour after the dive you might suspect _____ sickness
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Decompression
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A symptom of carbon monoxide poisoning is often
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Headache
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Descent rate of _____ feet per minute for diving is acceptable when using the usn / naui dive tables
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30
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The point at which a sudden change in water temperature occurs is a ______
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Thermocline
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Currents which suddenly appear and disappear are ______
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Rip current
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_______ is the underwater movement of water caused by wave action that you will experience when diving in areas close to the shore
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Surge
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The predictable daily rise and fall of the ocean at a single point is called _____
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Tide
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Most surface waves are caused by the _____
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Wind
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Examples of natural navigation aids that divers may use during Dives include ____ in the sand, ____, or bottom ______
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Ripple's, lights/rays, landmarks
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Almost all injuries from Aquatic Life are caused by _______ action on the part of the animal
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Defensive
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To render first aid for venomous fish wounds ____ the wound to clean, _____ in hot water and obtain medical attention
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Wash / flush, soak
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The first aid for sea animals stings such as those from jellyfish is the application of a sting _______ _____
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Neutralizing agent
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A diver with a group letter of "f" making a dive to 60 feet has a residual nitrogen time of
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36 minutes
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It is advisable that a sport / recreational diver ______ decompression Dives
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Avoid
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For Optimum no decompression bottom times, plan repetitive dives so that each successive dive is to a _____ depth
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Shallower
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The maximum dive time for dive to 60 feet is ______
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55 minutes
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According to NAUI a repetitive dive is defined as more than one dive within a period of ____ hours
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24
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The minimum surface interval recommended between two Dives is_____
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60 minutes
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According to the NAUI dive tables, Dives to less than 40 feet are considered as ____ dives
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40 foot
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Appropriate first aid measures for an unconscious scuba diver should include consideration of drowning, _____ and decompression sickness
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Air embolism
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Four main actions you should consider when giving first aid for diving accidents are maintain basic _____ support, call for _____, treat for _____, and deliver 100% _____
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life, help, shock, oxygen
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To prevent sea sickness you should settle yourself in the ____ point of the boat
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Center / Midway
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The preferred action to take if you find yourself alone and out of air at 30 feet in open water is ______ ascent
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Emergency swim
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If you are diving wearing an exposure suit, you should add air to your ____ to safely control your buoyancy as you descend
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BC vest
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The following limits should be established prior to every scuba dive, they are _____bottom time, ____ depth, _____ air pressure
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Maximum, maximum, minimum
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Factors that can make you incapable of sustaining your efforts in diving
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All of above
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The ______can most readily provide assistance to a diver
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Diver buddy
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A diver experiencing Panic should _____, rest and breathe _____ and _____ until you recover
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Stop, slowly, deeply
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The most effective way to descend while maintaining orientation and attempting Equalization of the ears is _____ first
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Feet
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Continued loss of body heat in cold water will produce muscle _____ Progressive ______ and insensibility to ______
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Cramps, weakness, pains
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Physical fitness is an important consideration for scuba divers because it helps prevent diving accidents due to_____
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Fatigue
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When conducting a buoyancy check, vertical buoyancy with a normal breath you should float at____
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Eye level
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The ______ is a worldwide emergency network of hyperbaric chambers and Diving Physicians
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DAN (DIVERS ALERT NETWORK)
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It is recommended that a dive team diving from an anchored boat have a trail line ____ long with the bouey at the end
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100 feet
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It is recommended that a dive team diving from an anchored boat begin their dive _____ the prevailing current
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Against
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If during the day you and your buddy become separated, you should spend no more than _____ looking for them and then surface
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1 minute
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To relieve a cramp in the calf, bend the toe of the fin toward the _____ to stretch the ______
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knee, muscle
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A diver on the surface waving his / her hands overhead and thrashing violently indicates_____
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Distress
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Immediately upon reaching the dive site, you should _______ the conditions
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Evaluate
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Completing this entry level scuba certification course makes you knowledgeable and skillful enough to dive safely in or at open Waters with conditions ______ you were trained in
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Similar to those
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If you received your training in the surf off California then moved to Boston, the best way of becoming familiar with those driving procedures specific to Boston and the east coast is to contact an active ____ and _____ with him/her
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Instructor, train
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When planning and executing a dive, it is important for diving Buddies
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To agree on a dive
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The last thing to check before making a giant stride or any water entry is that the area below is _____
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Clear
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If it is suspected that the air in the tank is contaminated due to its smell or taste do not use the tank and immediately _____ the dive shop that fill the tank so they can ______the problem
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Tell, solve ( do not dive if they do not replace the tank
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Inadequate ____, recent head _____, recent ingestion of ____ are physical factors that can make you incapable of sustaining the effort sometimes demanded when participating in recreational diving
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Rest, injury, alcohol
