NAUI SCUBA Exam: 85 Questions with Answers, Exams of European Computer Driving Licence (ECDL)

Download NAUI SCUBA Exam: 85 Questions with Answers and more Exams European Computer Driving Licence (ECDL) in PDF only on Docsity!

NAUI SCUBA Exam | 85 Questions with 100% CorrectAnswers | Verified | Latest Update 2024

At a minimum, while diving, most dive computers display: - Correct answer-Maximum depth, currentdepth, actual bottom time, remaining allowable bottom time.

Which of the following is an essential feature to consider when selecting a diving mask? - Correctanswer-Tempered or safety glass

Snorkels over 15 inches (38 centimeters) in length are not recommended primarily because: - Correctanswer-They have too much dead air space.

When buying or renting equipment for diving, the most important consideration is: - Correct answer-Itsfit on your body.

When rinsing a regulator it is best to: - Correct answer-Leave the regulator attached to the tank or havethe dust cap in place.

Three features that are common to all buoyancy control devices are: - Correct answer-An overpressurerelief valve, inflation/deflation hose, low pressure inflator hose.

Three types of alternate air sources that are in common use today are: - Correct answer-Octopus rigs,completely redundant systems, an integrated regulator into the BCD inflation/deflation hose.

According to the United States Department of Transportation regulations, scuba tanks must behydrostatically tested every: - Correct answer-5 years

The most important functional feature of a weight belt or weight system is: - Correct answer-A meansfor ditching the weights immediately with one hand.

The primary purpose of the exposure suit is to: - Correct answer-Preserve body heat during dives. You should have your regulator serviced by a certified repair technician: - Correct answer-At least onceper year.

The stage of the regulator which reduces tank pressure is: - Correct answer-first Two types of materials that scuba tanks are made from are steel and _________. - Correct answer-aluminum

The _________ line is the direction of travel line on the compass. - Correct answer-lubber The dive knife is used primarily as a _________ for digging, cutting, pounding and prying. - Correctanswer-Tool

Markings on scuba tanks include: - Correct answer-Date of hydrostatic test, serial number, type ofmaterial.

Atmospheric pressure at sea level is: - Correct answer-14.7 pounds per square inch/1.0 atmosphereabsolute (1.01 bar).

A sealed balloon filled with air that has a volume of 4 liters at 99 feet of seawater (30.2 m) will have avolume of ____________ liters at 33 feet of seawater (10.1 m). - Correct answer-8 liters

The weight of freshwater is: - Correct answer-62.4 pounds per cubic foot (1000 kg/m3).

Air, the gas most commonly used by recreational scuba divers, is composed of: - Correct answer-78%nitrogen, 21% oxygen, trace gasses.

Which of the following causes objects to appear larger and closer when looking through a mask during adive? - Correct answer-Refraction

Sound travels approximately how many times faster in water than in air? - Correct answer- A diver's body heat is lost through conduction (primarily) at a rate of approximately _________ timesmore rapidly than in air. - Correct answer-

Which of the following actions should a diver take to reduce drag and therefore the amount exertionduring a dive? - Correct answer-Streamline his/her body position.

The absolute pressure in the ocean at 53 feet (16.15 m) is: - Correct answer-2.6 atmospheres absolute(2.6 bar).

If a diver's surface air consumption rate is 30 psi per minute (2.1 bar per minute), what would be his/herconsumption rate at 66 feet (20.11 m) of seawater? - Correct answer-90 psi per minute (6.2 bar per minute). A depth that is equivalent to one atmosphere in the ocean is equal to _________ feet (meters) inseawater and _________ feet (meters) in freshwater. - Correct answer-33; 34 (10.06;10.36)

Two methods of measuring air pressure are BAR or: - Correct answer-PSI Which of the following describes the term "positive buoyancy"? - Correct answer-An object displaces anamount of water weighing more than itself.

Three factors that adversely affect a diver's air consumption rate are: - Correct answer-Large physicalsize, high anxiety, poor fitness level.

Pressure in the middle ear is equalized through a part of the body called the: - Correct answer-Eustachian tube

A scuba diver tends to become dehydrated while diving due to: - Correct answer-Moisturizing dryinhaled air.

Symptoms of Nitrogen Narcosis are similar to: - Correct answer-Alcohol intoxication. A diver's inability to equalize his/her ears during descent could cause: - Correct answer-Ear squeeze An irregular breathing pattern (skip breathing) while diving will possibly cause: - Correct answer-Carbondioxide excess.

Generally, for maximum efficiency, your breathing should be: - Correct answer-Slightly slower anddeeper than you normally breathe.

To prevent air embolism, a diver should: - Correct answer-Breathe normally at all times during ascentand never hold his/her breath.

A diver with blood and mucous in his/her mask upon surfacing will most likely have: - Correct answer-Sinus squeeze

If your dive buddy complains to you about having aching pain in his/her shoulder one hour after thedive, you might suspect: - Correct answer-Decompression sickness.

A symptom of hypothermia which indicates that a diver should terminate his/her dive is: - Correctanswer-Shivering

Which of the following activities is most appropriate for re-establishing or maintaining an adequatefitness level for safe diving? - Correct answer-Workouts in a pool with mask, fins, and snorkel 3 times per week.

Which of the following is the point at which a sudden change in water temperature occurs? - Correctanswer-A thermocline.

Three general categories of currents are: - Correct answer-Standing, Tidal, Transitory. A dive team caught in a rip current taking them in a direction they do not want to go, should: - Correctanswer-Swim at a right angle to the current.

Two ways that tidal action affect diving conditions include: - Correct answer-Entry and exit conditionsmay change and tidal currents may become quite strong.

Most surface waves are caused by: - Correct answer-Wind Examples of natural navigation aids divers may use during dives include: - Correct answer-Ripple marksin the sand. Sun brightness/available light. Bottom contours. Almost all injuries from aquatic life are caused by _________ action on the part of the animal. - Correctanswer-defensive

To render first aid for stings such as those from jellyfish: - Correct answer-Removal of stinging materialand application of a neutralizing agent.

Which buddy system technique is recommended when diving in limited visibility? - Correct answer-Holding hands or use a buddy line.

A diver with a group letter of "D" making a dive to 60 feet of seawater (18.24 m) has a residual nitrogentime of: - Correct answer-24 minutes

It is advisable that a sport/recreational diver: - Correct answer-Avoid decompression dives.

For optimum no-decompression bottom times, plan repetitive dives so that each successive dive is to_________ depth. - Correct answer-a shallower

The maximum dive time for a dive to 65 feet of seawater (19.76 m) is _________ minutes. - Correctanswer-

The minimum surface interval required to avoid stage decompression after a dive to 70 feet offreshwater (20.8 m) for 35 minutes, followed by a dive to 55 feet of freshwater (16.33 m) for 23 minutes is: - Correct answer-1 hr, 16 minutes According to NAUI, a repetitive dive is defined as more than one dive within a period of _________hours. - Correct answer-

The minimum surface interval recommended between two dives is _________ minutes. - Correctanswer-

Your first dive is to 60 feet of seawater (18.24 m) for 50 minutes. You spend one hour and 40 minutes onthe surface, what is your adjusted maximum dive time at 60 feet of seawater (18.24 m)? - Correct answer-19 minutes A buddy team in a NAUI Master Scuba Diver Course makes an ocean dive to 100 feet (30.4 m) for 18minutes. After a surface interval of 2 hours and 35 minutes, they make a repetitive dive to 70 feet (21. m) for 24 minutes. They remain on the surface for 2 hours and 51 minutes before diving to 45 feet(13.68 m). What is their adjusted maximum dive time for the third dive? - Correct answer-51 minutes

According to NAUI, how long should you wait before flying after conservative diving? - Correct answer-12-24 hours

If your buddy is in distress at the surface, three recommended actions to take are: - Correct answer-Safely establish buoyancy for your buddy, get him/her to relax or rest, tow him/her to the shore/boat.

Four main actions you should consider in giving first aid for diving accidents are: - Correct answer-Maintain basic life support, call for help, treat for shock, deliver 100% oxygen.

Which of the following will help to prevent seasickness? - Correct answer-Settle yourself in a midwaypoint of the boat.

Which of the following is a hazard when diving in limited visibility or at night? - Correct answer-Vertigo. If you are diving wearing an exposure suit, you should _________to safely control buoyancy as youdescend. - Correct answer-add air to your buoyancy device

Which of the following limits should be established prior to every scuba dive? - Correct answer-Maximum bottom time, maximum depth, minimum air pressure.

Which of the following physical factors can make you incapable of sustaining the efforts sometimesdemanded when participating in recreational diving? - Correct answer-Inadequate sleep. A recent head cold. Recent ingestion of drugs (medicine, alcohol, narcotics). Which action is recommended if the power inflation mechanism on your BCD "sticks" or "freezes" in theopen position during a dive? - Correct answer-Immediately disconnect the inflator hose and vent air from the BCD as needed to maintain proper buoyancy. A diver experiencing panic should: - Correct answer-Stop, rest and breathe slowly and deeply until yourecover.

Which is the most effective way to descend while maintaining orientation and attempting equalizationof the ears? - Correct answer-Feet first.

Continued loss of body heat in cold water will produce: - Correct answer-Muscle cramps.Progressive immobility. Insensitivity to pain.

Physical fitness is an important consideration for scuba divers because it helps to prevent divingaccidents due to: - Correct answer-Exhaustion

When conducting a buoyancy check, neutral buoyancy or proper weighting is attained when, with anormal breath, you float at or near: - Correct answer-eye level

_____ is a worldwide emergency network of hyperbaric chambers and diving physicians. - Correctanswer-DAN

When making an Emergency Ascent, a scuba diver should: - Correct answer-Exhale continuously duringthe ascent, periodically attempting to inhale.

It is recommended that a dive team diving from an anchored boat begin their dive: - Correct answer-Against the prevailing current.

If during a dive you and your buddy become separated, you should: - Correct answer-Spend no morethan one minute looking and then surface.

To relieve a cramp in the calf: - Correct answer-Bend the toe of the fin toward the knee to stretch themuscle.

A diver on the surface waving his/her hand overhead and thrashing violently indicates: - Correct answer-Distress

Immediately upon reaching the dive site, you should: - Correct answer-Observe conditions. Completing this entry-level scuba certification course makes you knowledgeable and skillful enough todive safely in or at: - Correct answer-Open water with conditions similar to those in which you were trained. If you receive your entry level training in the surf off California and then move to Boston, the best way ofbecoming familiar with the diving procedures specific to Boston and the east coast area is to: - Correct answer-Contact an active, preferably NAUI, instructor in Boston and dive with him or her.

According to NAUI, which of the following is essential to consider when planning a safe dive? - Correctanswer-One team member acts as the leader, agreement on the activity/objective, set the course to be followed, discuss contingency plans and emergency procedures. Which of the following is a typical cause of entanglement underwater? - Correct answer-Fishing line. If it is suspected that the air in a tank is contaminated due to its smell or taste: - Correct answer-Do notuse the tank and immediately call the dive shop that filled the tank so they can investigate the problem.