Naui Scuba certification notes – Flashcards
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a diving watch must be able to withstand pressure and measure____________
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Elapsed time
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An irregular breathing pattern (skip breathing) while diving will possibly cause_______________
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Carbon dioxide excess
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Which is the most effective way to descend while maintaining orientation and attempting equalization of the ears?
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Feet first
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If during a dive you and your buddy become separated you should____________
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spend no more than one minute looking and then surface
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Which of the following activities is most appropriate for re-establishing or maintaining an adequate fitness level for safe diving?
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workouts in a pool with mask,fins,and snorkel 3 times per week
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at minimum while diving most dive computers desplay
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maximum depth, current depth, actual bottom time, remaining allowable bottom time
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Which of the following affects visability
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All of these: Water movement, bottom composition, season
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When conducting a buoyancy check, neutral buoyancy or proper weighting is attained when, with a normal breath you float at or near
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eye level
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open heel fins are usually the fins of choice for scuba divers because
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they may be used in a wide variety of environmental conditions
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minimum surface intervals required by naui rgbm no-calculation sea level tables are
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one hour
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your first dive is to 60 feet for 40 minutes. you spend one hour and 40 minutes on the surface. what is your maximum depth and bottom time for the second dive?
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45 fsw/80 minutes
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sea water weighs
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64.0 pounds per cubic foot
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during descent a divers buoyancy tends to _______
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decrease
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four main actions you should consider in giving first aid for diving accidents are
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maintaining basic life support, call for help, treat for shock, deliver 100% oxygen
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a divers body heat is lost through conduction (primarily) at the rate of approximately __________ times more rapidly then in air
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25
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a sealed balloon filled with air that has a volume of 4 liters at 99 feet of seawater will have a volume of _____________ at 33 feet of seawater
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8 liters
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which of the following are NAUI sanctioned specialty courses
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All of these: Night diver, underwater ecologist, underwater photographer
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scuba tanks should always have some pressure in them to prevent
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moisture from entering
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NAUI RGBM no calculation sea level tables may be used up to _________ of altitude
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2000 feet
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If you are diving wearing an exposure suit you should _______ to safely control buoyancy as you descend
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Add air to your buoyancy device
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Physical fitness is an important consideration for scuba divers because it helps to prevent accidents due to
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exhaustion
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Immediately upon reaching the dive site you should
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observe conditions
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to prevent air embolism a diver should
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breath normally at all times during ascent and never hold his/her breath
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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
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emergency swimming ascent
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Weighting systems are used by the diver primarily to
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offset the positive buoyancy created by the wet suit
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Breathing dry air a scuba diver tends to become dehydrated while diving due to
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moisturizing dry inhaled air
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Symptoms of Nitrogen Narcosis are similar to
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Alcoholic Intoxication
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Which action is recommended if the power inflation mechanism on your BCD sticks or freezes in the open position during a dive
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Immediately disconnect the infiltrator hose and vent air form the bc as needed to maintain proper buoyancy
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Three factors that adversely affect a divers air consumption rate are
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Large physical size, high anxiety, poor physical phitness level
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A diver with blood and mucous in his/her mask upon surfacing will most likely have
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sinus squeeze
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Two types of materials that scuba tanks are made from are steel and _________
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alumnum
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Factors that can affect the breathing ease of a snorkel are
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Both: diameter and length
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A diver's inability to equalize his/her ears during ascent could cause
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block or reverse block
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A depth that is equivalent to one atmosphere in the ocean is equal to _______ feet in sea water and ________ feet in fresh water
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33,34
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All divers deeper than 30 require a safety stop at ______ for ________
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15 fsw/ 3 minutes
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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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dive two in a day of repetitive dive must be
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shallower as listed under dive two's maximum depth to the immediate right row of dive one
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Which buddy system technique is recommended when diving in limited visaility
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Holding hands are using a buddy line
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The last thing to check before making a giant stride or any water entry is that
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area below is clear
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If a divers surface air consumption rate is 30 psi per minute. what would be his/her consumption rate at 66 feet of seawater
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90 psi per minute
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you should have your regulator serviced by a certified repair technician
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at least once per year
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If you accidentally exceed your NDL by less than 5 minutes you must conduct a decompression stop at 15 fsw for
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6 minutes
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The following rate of ascent for diving is aceptable when using the USN/NAUI dive tabels
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30 feet per minute
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Sound travels about________ times faster in water than in air
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4
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Most surface waves are caused by
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wind
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According to the NAUI RGBM Dive Table, after the buddy team in the NAUI master scuba diver course completes their two dives the team can dive up to 30 fsw for 150 minutes after a minimum of a _________ surface interval
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1 hour
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Two recommended methods of clearing your snorkel are the blast and the ________ clear
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Displacement
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Proper maintenence of instruments includes
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All of these: Do not subject them to extreme temperature changes, rinse them in fresh water at the end of each diving day, have them inspected and serviced annually by a qualified technician
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Because of refraction, objects underwater appear________ and ________ when the diver is looking through his/her mask
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Larger, closer
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Three types of alternate air sources that are in common use today are
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Octopus rigs, completely redundant systems, an integrated regulator in the BCD inflation/deflation hose
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A diver on the surface waving his/her hand overhead and thrashing violently indicates
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distress
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The predictable daily rise and fall of the ocean at a single point is called
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The Tide
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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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Which of the following is a typical cause of entanglement underwater?
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fishing line
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If you receive your entry level training in the surf off California and then move to Boston, the best way of becoming familiar with the diving procedures specific to Boston and the east coast area is to
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Contact an active, preferably NAUI, instructor in Boston and dive with him or her
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A symptom of carbon monoxide poising is ofter
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headache
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____________is a worldwide emergency network of hyperbolic chambers and diving physicans
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Divers alert network (DAN)
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`A ______________ calculates your remaining allowable bottom time
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Dive computer
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Two methods of measuring air pressure are BAR and
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Pounds per square inch
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The maximum dive time for a dive is 60 fsw on your first dive of the day is
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55 minutes
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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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Completing this entry level scuba certification course makes you knowledgeable and skilfully enough to dive safely in or at
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Open water conditions similar to those in which you were trained
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What type of pressure is defined as gauge (water) pressure plus atmospheric (air) pressure?
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Absolute
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Examples of natural navigation aids divers may use during dives include
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All of these: Bottom contours, Ripple marks in the sand, Sun brightness/available light
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Generally for maximum efficiency your breathing should be
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slightly slower and deeper then you normally breath
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NAUI RGBM no calculation sea level dive tables allow dive three to be repeated until the cumulative time reaches the MDT for dive 4
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True
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Which of the following should be established prior to every scuba dive?
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Maximum bottom time, maximum depth, minimum air pressure
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Continued loss of body heat in cold water will produce
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All of the rest: Progressive immobility, insensibility to pain, muscle cramps
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When making an emergency swimming ascent a scuba diver should
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Exhale continuously during the ascent, periodically attempting to inhale
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Which of the following describes positive bouyancy
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The correct answer is an object weighs less then the amount of water it displaces
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which of the following is a hazard when diving in limited viability or at night?
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Vertigo
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A buddy team in a NAUI master scuba diver course makes an ocean dive to 95 feet for 20 minutes after a one hour and 20 minute surface interval they can make a dive to 65 feet for ________ minutes or less
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40
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Newly certified divers who desire additional training and an orientation to a variety of diving sites and conditions should take a NAUI
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Advanced scuba divers course
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The weight of freshwater is
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62.4 pounds per cubic foot
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if you are careless about your buoyancy control you can break off pieces of coral or rub off its protective coating
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true
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Which of the following physical factors can make you incapable of sustaining the efforts sum times demanded while participated in recreational
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All of the rest: Inadequate sleep, recent ingestion of drugs, a recent head cold
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When rinsing a regulator it is best to
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Leave the regulator attached to the tank or have the dust cap in place
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To render first aid for venomous fish fish wounds
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Flush the wound to clean soak in hot water obtain medical attention
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Three main types of _______ are back flotation, jacket, and horse collar
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BC's
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A dive team caught in a rip current taking them in a direction they do not want to go should
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swim at a right angle to the curren
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The most important functional feature of a weight belt or weight system is
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A means for ditching the weights immediately with one hand
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Which of the following most readily provides assistance to a diver?
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The diving buddy
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A diver experiencing panic should
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Stop, rest and breath slowly and deeply until your recover
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Atmospheric pressure at sea level is
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14.8 Psi/ 1.0 atmosphere absolute
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A symptom of hypothermia which indicates that a diver should terminate his/her dive is
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shivering
