NAUI Open Water Scuba Diver Certification Exam Questions and Answers, Exams of Sport Studies

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NAUI OPEN WATER ELEARNING SCUBA DIVER

CERTIFICATION EXAM 2024-2025 QUESTIONS &

CORRECT ANSWERS

Your entry-level NAUI Scuba Diver certification is a "license to .": learn physical fitness is an important consideration for scuba divers because ithelps to prevent diving accidents due to: exhaustion Completing this entry-level scuba certification course makes you knowl- edgeable and skillful enough to dive safely in or at:: open water with conditions similar to those in which you were trained Which of the following physical factors can make you incapable of sustain- ing efforts sometimes demanded when participating in recreational diving?: - ALL OF THE ABOVE

• inadequate sleep
• recent head cold
• recent ingestion of drugs Diving equipment should be: rinsed thoroughly, dried and stored in a cool place open heel fins are usually the fins of choice for scuba divers because: theymay be used in a wide variety of environmental conditions Factors that can affect the breathing ease of a snorkel are: length ANDdiameter When selecting a face mask, the most important thing to consider is: properseal and fit Snorkels over 15 inches in length are not recommended primarily because-: They have too much dead air space when buying or renting equipment for diving, the most important consid-eration is:: the fit on your body Hydrostatic and visual inspection standards are different around the world.Consult your local NAUI facility to learn about the regulations in your area T or F: True

Engraved markings on scuba tanks include:: Date of hydrostatic test, serialnumber, type of material Two types of materials that scuba tanks are made from are steel and .: aluminum scuba tanks should always have some pressure in them to prevent : moisture from entering You should have your regulator serviced by a certified repair technician: As recommended by the manufacturer The stage of the regulator which reduces working tank pressure to inter-mediate pressure is: The first stage The line is the direction of travel line on the compass: Lubber When rinsing a regulator it is best to:: Leave the regulator attached to thetank or have the dust cap in place A calculates your remaining allowable bottom time while diving: divecomputer A diving watch must be able to withstand pressure and measure .: - Elapsed time Proper maintenance of instruments includes:: ALL OF THE ABOVE -->Rinse them in fresh water at the end of each diving day. Have them inspected and serviced annually by a qualified technician.Do not subject them to extreme temperature changes. Three main types of are back floatation, jacket, and horse collar: BCs Essential features found on all BCs are:: ALL OF THEE ABOVE -->power inflator mechanism overpressure relief valveinflator/deflator hose You should rinse your BC internally because inside your BC cancause damage.: ALL OF THE ABOVE --> salt water dirty water

A depth that is equivalent to one atmosphere in ocean is equal to insea water and in fresh water: 10 m (33 feet) ; 10.4 m (34 feet) Two recommended methods of clearing your snorkel are the blast and the clear.: displacement To prevent losing your balance when donning fins, you can .: ALL OFTHE ABOVE --> use the figure-4 positionsit down use your buddy's shoulder for support when the pressure of nitrogen is balanced between the air and your body,you are at a state of : Equilibrium If the temperature surrounding a rigid container full of gas increases, thepressure of the gas increases. T or F: True The amount of water vapor in the air is known as: humidity The clear of your snorkel requires the least amount of energy: displace-ment During descent, a diver's buoyancy tends to .: decrease If you are weighted to be neutral in salt water and you dive in fresh water with the same amount of weight, you will float. T or F: False if a divers surface air consumption rate is 1.72 bar (25 psi) per minute, what would be the consumption rate at 20 meters (66 feet) of seawater?: 5.16 bar per minute (75 psi per minute) If you must walk in fins, you must walk .: backwards A scuba cylinder valve is turned on when you rotate it in a clockwisedirection. T or F: False You and your buddy should don your scuba units .: as a team When you assemble your scuba unit the outlet from the cylinder valveshould be pointing towards the divers head. T or F: True

a sealed balloon filled with air that has volume of 6 cubic inches at 99 feet will have a volume of cubic inches at 33 feet: 12 What type of pressure is defined as gauge (water) pressure plus atmos-pheric (air) pressure)?: Absolute Atmospheric pressure at sea level is:: 1.0 bar / 14.7 pounds per square inch / 1.0 atmospheric absolute When donning a weight belt ensure that .: It is clear to be ditched ifnecessary The last thing to check before making a giant stride or any water entry isthat: area below is clear Continued loss of body heat in cold water will produce:: ALL OF THEABOVE --> muscle cramps progressive immobilityinability to pain A diver experiencing panic should: stop, rest and breathe slowly and deeplyuntil you recover when planning and executing a dive, it is important for diving buddiesto:: agree on a dive leader If your dive buddy complains to you about having aching pain in his/her shoulder one hour after the dive, you might suspect: decompression sickness An irregular breathing pattern (skip breathing) while diving will possiblycause:: carbon dioxide excess A regular breathing pattern while diving would be: slightly slower and deeperthan you normally breath If it is suspected that the air in a tank is contaminated due to its smell or taste:: Do not use the tank and immediately call the dive shop that filled the tank sothey can investigate the problem A diver with blood and mucous in his/her mask upon surfacing will mostlikely have: sinus squeeze To prevent air embolism, a diver should: Breathe normally at all times duringascent and never hold his/her breath

According to NAUI, a repetitive dive is defined as more than one dive within a period of hours.: 24 It is recommended that you not consume alcohol within hour(s) of aplanned dive: 12 A NAUI open water scuba diver should not dive deeper than 18 meters (or 60 feet). T or F: True for optimum no-decompression bottom times, plan repetitive dives sothat each successive dive is to a depth: a shallwer The minimum surface interval recommended between two dives is minutes.: 60 Which of the following limits should be established prior to every scubadive?: Maximum bottom time, maximum depth, minimum air pressure To relieve a cramp in the calf: bend the toe of the fin toward the knee to stretchthe muscle If the distance to the water is several feet, use the entry.: giant stride The objective of an entry is to : Enter the water with minimal effort If you are entering the water from a small boat, use the entry: back roll The maximum dive time for a dive to 60 ft is minutes: 50 The minimum surface interval required to avoid decompression after a dive to 88ft for 18 minutes, followed by a dive to 78 ft for 23 minutes is: 4 hr, 49 minutes The first dive is to 60ft for 50 minutes.You spend one hour and 40 minuteson the surface, what is your adjusted maximum dive time at 60ft?: 4 minutes It is advisable that a sport/recreational diver:: Avoid the decompressiondives If you are able to sit at the edge of the water, use the entry: seatedside When you clear water from a mask with a purge valve, you tilt your head:-: forward When you clear water from a mask without a purge valve, you tilt yourhead:: backwards

You can clear your regulator second stage of water by doing the orthe clear.: blast, purge Whenever the mouthpiece of your regulator is out of your mouth, you must continually exhale a small stream of bubbles. T or F: True You should check your submersible pressure gauge every minutes inshallow water and more frequently in deeper water: 5 Which is the most effective way to descend while maintaining orientationand attempting equalization of the ears: feet first Most diving problems occur: at the surface The NAUI RGBM dive tables are for both air and nitrox, and can be usedfor elevations up to 3048m (10,000 feet) above sea level. T or F: True For any given divem you will use only one of the RGBM tables, but it isessential that you be aware of and use the appropriate table. T or F: True Specific rules for that particular table use are found on the back of eachtable. T or F: True Dive computers though expensive, enhance divers safety by tracking their depth and time more accurately than can be achieved with dive tables. Tor F: True Four main actions you should consider in giving first aid for diving accidents are:: maintain basic life support, call for help, treat for shock, deliver100% oxygen is a worldwide emergency network of hyperbaric chambers anddiving physicians: Divers Alert Network (DAN) Which of the following is the point at which a sudden change in watertemperature occurs?: A thermocline A thermocline is a thin zone of radical change in water .: temperature is the underwater movement of water caused by wave action thatyou will experience when diving in areas close to shore: Surge The following rate of ascent for diving is acceptable when using theUSN/NAUI dive tables:: 30 feet per minute

almost all injuries from aquatic life are caused by action on the part of the animal.: defensive Newly certified divers who desire additional training and an orientation toa variety of diving sites and conditions should take a NAUI .: advanced scuba diver course There are many opportunities to work as a diving professional.T or F: True if you are careless about your buoyancy control you can break off pieces of coral or rub off its protective coating. T or F: True It is recommended that a dive team diving from an anchored boat begintheir dive: against the prevailing current It is recommended that a dive team diving from an anchored boat have: atrail line 30 meters long with a buoy at the end currents which suddenly appear and disappear are : transitory A plan is a written plan of your destination and your expected time of return that is left with someone on shore so they can summon help if you do not return within a reasonable time: float Local dive clubs are an excellent way to: ALL OF THE ABOVE --> Meet new divers get information about the local diving areaintroduce new diving activities Which of the following are NAUI-sanctioned specialty courses?: ALL OFTHE ABOVE --> underwater digital imagingnight diver underwater naturalist You should dive your buddy.: Side by side with If you wave to someone from the surface, it is a sign of distress, NOT a wayto say hello. T or F: True The NAUI Diving Hand Signals are standard in the United States diving community and are usually recognized in other countries as well. T or F: True

When donning your cylinder at the surface and donning your cylinder underwater, the primary difference is that you want to be:: positively buoyantat the surface and negatively buoyant at the bottom You may need to don or remove your equipment in the water if:: ALL OFTHE ABOVE --> The boat you are using is too small to allow equipment handlingan item of gear needs adjusted if your scuba unit gets caught in fishing line Examples of natural navigation aids divers may use during dives include:-: ALL OF THE ABOVE --> ripple marks in the sand sun brightness/available lightbottom contours A reciprocal course is made when your outbound course is a straight lineand halfway through your dive you make a turn.: 180 degrees The first color lost in the spectrum upon descent during diving is .: red A diver's body heat is lost through conduction (primarily) at a rate of approximately times more rapidly than in air.: 25 Sound travels about times faster in water than in air: 4 because of refraction, objects underwater appear & when thediver is looking through his or her mask.: larger; closer Your body weight does not affect your buoyancy. T or F: False If you are diving wearing an exposure suit, you should to safelycontrol buoyancy as you descend.: add air to your buoyancy device