Naui Scuba Diving Open Water Test Questions and Answers, Exams of Advanced Education

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Naui Scuba Diving Open Water Test

Questions and Answers

___ is a worldwide emergency network of hyperbaric chambers and diving physcians - ANSWER-DAN Divers alert network a _ plan is written plan of your desitnation and your expected time of return that is left with someone on shore... - ANSWER-float A __ compensates for the compression of wetsuits as you descend underwater - ANSWER-compensating weight belt A ___ calculates your remaining allowable bottom time while diving - ANSWER-dive computer A depth that is equivalent to one atmosphere in the ocean is equal to _________ feet in sea water and _________ feet in fresh water. - ANSWER-10 m 33 ft and 10.4 m 34 ft A diver experiencing panic should: - ANSWER-stop, rest and breathe slowly and deeply until you recover a diver with a group letter F making a dive 60 ft has residual nitrogen time of - ANSWER-35 min a diver with blood and mucus in his/her mask upon surfacing will most likely have - ANSWER-sinus squeeze a divers body heat is lost through conditions at a rate of approx _ times more rapidaly than air - ANSWER- a divers inability to equalize his/her ears ascent could cause - ANSWER-a block or reverse block a diving watch must be able to withstand pressure and measure - ANSWER-elapsed time A naui open water scuba diver should not dive deeper than 18 meters (60 ft) - ANSWER-true a reciprocal course is made when your outbound course is a straight line and halfway through your dive you make a __ turn - ANSWER- a regular breathing pattern while diving would be - ANSWER-slightly slower and deeper than you normally breathe

a scuba cylinder valve is turned on when you rotate it in a clockwise direction - ANSWER-false a symptom of carbon monoxide poisoning is often - ANSWER-headache a thermocline is a thin zone of radical change in water - ANSWER-temperature According to NAUI, a repetitive dive is defined as more than one dive within a period of _________ hours. - ANSWER- according to the naui dive tables dives to less than 6m (20ft) - ANSWER-are considered as 6 m (20 foot dives) almost all injuries from aquatic life are caused by _____ action on the part of the animal.

• ANSWER-defensive An additonal accessory that will be useful to you is - ANSWER-all of the above An irregular breathing pattern (skip breathing) while diving will possibly cause: - ANSWER-carbon dioxide excess Appropriate first aid measures for DCS should include - ANSWER-lie victim down maintain circulation and respiration administer 02 if qualified Atmopsheric pressure at sea level is - ANSWER-1.0 bar/ 14.7 pounds per inch/ 1.0 atm absolute because of refraction objects underwater appear _ and _ when the diver is looking through their mask - ANSWER-larger, closer breathing dry air a scuba diver tends to become dehydrated while diving due to - ANSWER-moisturizing dry inhaled air Completeing 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 computers and dive tables will eliminate the risk of DCS - ANSWER-false Continued loss of body heat in cold water will produce: - ANSWER-all of the above dive computers though expensive enhance divers safety by tracking their depth and time more accurately than can be achieved with dive tables - ANSWER-true

Diving equipment should be - ANSWER-rinsed thoroughly, dried and stored in a cool place during descent a divers bouyancy tends to - ANSWER-decrease Engraved marking on scuba tanks include - ANSWER-date of the hydrostatic test. serial number, type of material Essential feautres found on all BCs are - ANSWER-All of the above examples of natural navigation aids divers may use during dives include - ANSWER-all of the above Factors that can affect the breathing ease of a snorkel are - ANSWER-Both a and B for any given dive, you will use only one of the RGBM tables but it is essentialv that you be aware of and use the appropriate table - ANSWER-true for optimum no decompression bottom times plan repetitive dives so that each successive dive is to depth - ANSWER-a shallower Four main actions you should consider in giving first aid for diving accidents are: - ANSWER-maintain basic life support, call for help, treat for shock , deliver 100 oxygen if a divers surface air consumption rate is 1.72 bar (25 psi) per minute what would be the cinsumption rate at 20 meters (66 ft) of seawater - ANSWER-5.16 bar per min 75 psi per min if during a dive you an dyour budy become seperated, you should - ANSWER-spend no more than one minute looking then surface 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 the can investiage the problem if th etemperature surrounding a rigid container full of gas increases the pressure of the gas increases - ANSWER-true if the distance to th ewater is several feet, use the __ entry - ANSWER-giant stride if you are able to sit at the edge of the water, use the __ entry - ANSWER-seated side if you are careless about your bouyancy control you can break off pieces of coral or rub off its protective coating - ANSWER-true

if you are diving wearing an exposure suit, you should _ to safely control bouyancy as you descend - ANSWER-add air to yuor buoyancy device if you are entering the water from a small boat, use the __ entry - ANSWER-back roll if you are weighted to be neutral in salt water and you dive in freshwater with the same amount of weight you will float - ANSWER-false If you dive deeper than approximately 6 meters (20 feet) and then ascend, the pressure change might be sufficient for bubbles to form if you have absorbed enough nitrogen. - ANSWER-true if you must walk in fins you must walk - ANSWER-backwards if you recieve your entry level training in a tropical environment and then move to a northern.... - ANSWER-contact an active, preferably naui dive master or instructor to orient you to the new locale if you wave to someone from the surface it is a sign of distress not a way to say hello - ANSWER-true 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 immediately upon reaching the dive site you should - ANSWER-observe conditions in the ocean a sealed balloon filled with air that has a volume of _ 10 m ( 33ft) - ANSWER-196 cubic centimeters (12 cubic inches) it is advisable that a sport/recreational diver - ANSWER-avoid the decompression dives it is recommended that you not consume alcohol within _ hours of a planned dive - ANSWER- local dive clubs are an excellent way to - ANSWER-all of the above most diving problems occur - ANSWER-at the surface Newly certified divers who desire additional training and an orientation to a variety of diving sites and conditions should take a NAUI _____. - ANSWER-advanced scuba diver course Open heel fins are usually the fins of choice for scuba divers because - ANSWER-they may be used in a wide variety of environmental conditions

Physical fitness is an important consideration for scuba divers because it helps prevent diving accidents due to - ANSWER-Exhaustion pressure in the middle ear is equalized through a part of th ebody called the - ANSWER-eustachian tube proper maintenance of instruments include - ANSWER-all of the above Scuba tanks should always have some pressure in them to prevent - ANSWER- moisture from entering sea water weighs _ kilograms per liter or _ pounds per cubic foot - ANSWER-1.025/64. Snorkels over 15 inches in length are not recommended primarly because - ANSWER- they have too much dead air space sound travels about _ times faster in water than in air - ANSWER- specific rules for that particular table use are found on the back of each table - ANSWER-true Symptoms of nitrogen narcosis are similar to - ANSWER-alcohol intoxication the _ clear of your snorkel requires the least amount of energy - ANSWER- displacement The ____ line is the direction of travel line on the compass - ANSWER-lubber the absolute pressure in the ocean at 16 meters (53 feet) is - ANSWER-2.6 atm absolute the amount of water vapor in the air is known as - ANSWER-humiditiy the dive knife is used primarly as a __ for digging, cutting, pounding,and prying - ANSWER-tool the first color lost in the specturm upon descent during a dive is - ANSWER-red the last thing to check before making a giant stride or any water entry is that - ANSWER-area below is clear the maximum dive time for a dive to 60 ft is _ min - ANSWER- the minimum surface interval recommended between two dives is - ANSWER-60 min

the minimum surface interval required to avoid ceompression after a dive to 88ft for 18 min followed by a dive to 78 ft for 23 min is - ANSWER-4 hours 49 min the most important feature of weight belt is - ANSWER-quick release the naui diving hand signals are standard in the united stattes diving community and are usually recognized in other countries as well - ANSWER-true the naui rgbm dive tables are for both air and nitrox and can be used for elevations up to 3048 m above sea level - ANSWER-true the objective of an entry is to - ANSWER-enter the water with minimal effort The stage of the regulator which reduces working tank pressure to intermediate pressure is: - ANSWER-the first stage the three general types of injury resulting form lung overexpansion are air embolism, pneumothorax and - ANSWER-tissue emphysema there are many oppurtunities to work as a diving professional - ANSWER-true three main types of ___ are back flotation, jacket, and horse collar - ANSWER-BCs to prevent air embolism a diver should - ANSWER-Breathe normally at all times during ascent and never hold his/her breath To prevent losing oyur balance when donning fins, you can - ANSWER-all of the above to relieve a cramp in the calf - ANSWER-Bend the toe of the fin toward the knee to stretch the muscle True/False Hydrostatic and visual inspection standards are different around the world. Consult your local facility to learn about the regulation in your area - ANSWER-true two methods of measuring air pressure are BAR or - ANSWER-pounds per square inch two recommended methods of clearing your snorkel are the blast and the __ clear - ANSWER-Displacement two types of material that scuba tanks are made from are steel and - ANSWER- aluminum weighting systems ar eused by the diver primarly to - ANSWER-offset the positvie bouyancy created by the wet suit

what type of pressure is defined as gauge (water) pressure plus atmospheric (air ) pressure - ANSWER-absolute when buying or renting equipment for diving the most important consideration is - ANSWER-its fit on your body when donning a weight belt ensure that - ANSWER-it is clear to be ditched if necessary when donning your cylinder at the surface and donning you cylinder underwater the primary difference is that you want to be - ANSWER-positvely buyont at the surface and negatively buoyant at the bottom when planning and executing a dive, it is important for diving buddies to - ANSWER- agree on a dive leader when rinsing a regulator it is best to - ANSWER-leave the regulator attached to the tank or have the dust cap in place when selecting a face mask the most important thing to consider is - ANSWER-Proper seal and fit when the pressure of nitrogren is balanced between the air and your body you are at a state of - ANSWER-equilibrium When you assemble your scuba unit the outlet from the cylinder valve should be pointing towards the divers head - ANSWER-true when you clear water from a mask with a purge valve, you tilt your head - ANSWER- forward when you clear water from your mask without a purge valve you tilt your head - ANSWER-backward when you fly a dive flag, you must - ANSWER-all of the above whenever possible it is best to talk to a distressed diver through solving their own minor difficulites - ANSWER-true whenever the mouth peice of your regulator is out of your mouth you must continually exhale a small stream of bubbles - ANSWER-true which gas law best explains diving medical problems such as ear and sinus squeeze - ANSWER-boyles law which of the followiing are naui sanctioned specialty courses - ANSWER-all of the above

which of the following affect visibility - ANSWER-all of the above which of the following is an example of a man made site - ANSWER-breakwater which of the following is an example of natural site - ANSWER-coral reef which of the following is an example of overhead environment - ANSWER-ice which of the following is the point at which a sudden change in awater temp occurs - ANSWER-thermocline which of the following limits should be established prior to every scuba dive - ANSWER- max bottom time, max depth, minimum air pressure which of the following most readily provides assistance to a diver - ANSWER-diving buddy 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 which of the following will help prevent seasickness - ANSWER-settle yourself in a midway point of the boat you and your buddy should don your scuba units - ANSWER-As a team you can clear your regulator second stage of water doing the __ or the __ clear - ANSWER-blast, purge you can prevent a mask from fogging under water by lowering the _ of the water - ANSWER-surface tension you may need to don or remove your equipment in the water if - ANSWER-all of the above you should check your submerisble pressure gauge every __ minutes - ANSWER- you should dive _ your buddy - ANSWER-side-by side with you should have a contingency plan for - ANSWER-each step of your dive plan you should have your regulator serviced by a certified repair technician - ANSWER-as recommended by the manufacturer you should record all dives in your logbook because - ANSWER-all of the above

You should rinse your BC internally because __ inside your BC can cause damage - ANSWER-All of the above your body weight does not affect your buoancy - ANSWER-false Your entry-level Naui scuba diver certification is a license to - ANSWER-learn your first dive is to 60 ft for 50 min you spend one hour and 40 min on the surface what is your adjusted maximum dive time at 60 ft - ANSWER-4 min