NAUI eLearning

Any time you enter the water to scuba dive, there is risk of an accident.

The responsibility of your well being depends on:

A pre-existing medical contraindication might disqualify you from scuba diving.

Areas of concern are:
Air spaces
All of the above

You need to be a skilled swimmer to learn to be a scuba diver.

The main concern in diving is
equipment malfunction
equipment misuse
hazardous marine life

Your entry-level NAUI scuba diver certification is a “license to “

Which of the following physical factors can make you incapable of sustaining the efforts sometimes demanded when participating in recreational diving?
all of the above

Physical fitness is an important consideration for scuba divers because it helps to prevent diving accidents due to:

Completing this entry level scuba certification course makes you knowledgeable and skillful enough to dive safely in or at:
open water with conditions similar to those in which you were trained

Factors that can affect the breathing ease of a snorkel are:
Length and Diameter

When selecting a face mask, the most important thing to consider is:
Proper seal 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 consideration is:
its fit on your body

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:
they may be used in a wide variety of enviromental conditions

In the United States, scuba cylinders must be internally inspected every _____ and pressure tested every _
1 year, 5 years

Scuba tanks should always have some pressure in them to prevent:
moisture from entering

According to the Department of Transportation regulations, scuba tanks must be hydrostatically tested every _______
5 years

Two types of materials that scuba tanks are made from are steel and _________.

Markings on scuba tanks include:
date of hydrostatic test, serial number, type of material

When rinsing a regulator it is best to:
leave the regulator attached to the tank or have the dust cap in place

you should have your regulator serviced by a certified repair technician:
at least once per year

The stage of the regulator which reduces tank pressure is:
the first stage

The _________ line is the direction of travel line on the compass.

A _____ calculates your remaining allowable bottom time while diving.
dive computer

A diving watch must be able to withstand pressure and measure _____.
elapsed time

Proper maintenance of instruments includes:
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.

Essential features found on all BCs are:
power inflator mechanism
overpressure relief valve
inflator/deflator hose

You should rinse your BC internally because _____ inside your BC can cause damage.
salt water
dirt water
chlorinated water

Weighting systems are used by the diver primarily to:
offset the positive buoyancy created by the wet suit

The most important feature of a weight belt is _____.
quick release

A _____ compensates for the compression of a wetsuit as you descend underwater.
compensating weight belt

The primary purpose of the exposure suit is to:
preserve body heat during dives

A _____ is suitable for warm, tropical diving.
dive skin

A _____ is made from foam neoprene.

A _____ uses undergarments for insulation.
dry suit

You do not need special training to use a dry suit.

The dive knife is used primarily as a _____ for digging, cutting, pounding and prying.

When you fly a dive flag, you must _____.
dive near the flag
remove the flag when divers are not in the water
fly from your surface support station

You should record all dives in your logbook because _____.
you might be required to show proof of experience
there are laws in parts to the world that require you to log dives
dive operators may review your logbook before they will provide services

An additional accessory that will be useful to you is _____.
underwater slate
goodie bag
spare parts kit

If you must walk in fins, you must walk _____.

To prevent losing your balance when donning fins, you can _____.
use the figure-4 position
sit down
use your buddy’s shoulder for support

Two recommended methods of clearing your snorkel are the blast and the _____ clear.

The _____ clear of your snorkel requires the least amount of energy.

When you mount your regulator on your cylinder, it should be lined up so that the inlet to the first stage of the regulator lines up with the outlet from the cylinder valve.

A scuba cylinder valve is turned on when you rotate it in a clockwise direction.

You and your buddy should don your scuba units _____.
as a team

To ensure that it is clear to be ditched if necessary, you should put the weight belt on _____.
after the scuba unit

The last thing to check before making a giant stride or any water entry is that:
area below is clear

The objective of an entry is to _____.
enter the water with minmal effort

If you are entering the water from a small boat, use the _____ entry.
back roll

If the distance to the water is several feet, use the _____ entry.
giant stride

If you are able to sit at the edge of the water, use the _____ entry.
seated side

When you clear water from a mask with a purge valve, you tilt your head:

When you clear water from a mask without a purge valve, you tilt your head:

Whenever the mouthpiece of your regulator is out of your mouth, you must continually exhale a small stream of bubbles.

You can clear your regulator second stage of water by doing the _____ or the _____ clear.
blast, purge

You should check your submersible pressure gauge every _____ minutes in shallow water and more frequently in deeper water.

The following rate of ascent for diving is acceptable when using the USN/NAUI dive tables:
30 feet per minute

Which is the most effective way to descend while maintaining orientation and attempting equalization of the ears?
feet first

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

The optimal method of knowing that you have air in an emergency is to:
carry a contingency supply

The preferred action to take if you find yourself alone and out of air at 30 feet in open water is:
emergency swimming ascent

If during a dive you and your buddy become separated, you should:
spend no more than one minute looking then surface

You should dive _____ your buddy.
side-by-side with

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

Tthe NAUI Diving Hand Signals are standard in the United States diving community and are usually recognized in other countries as well.

You may need to don or remove your equipment in the water if:
the boat you are using is too small to allow equipment handling
an item of gear needs adjusted
if your scuba unit gets caught in fishing line

When donning your cylinder at the surface and donning your cylinder underwater, the primary difference is that you want to be:
positively buoyant at the surface and negatively buoyant at the bottom

Examples of natural navigation aids divers may use during dives include:
ripple marks in the sand
sun brightness/available light
bottom contours

A reciprocal course is made when your outbound course is a straight line and halfway through your dive you make a _____ turn.
180 degrees

Because of refraction, objects underwater appear _________ and _________ when the diver is looking through his/her mask.
Larger; closer

A diver’s body heat is lost through conduction (primarily) at a rate of approximately _________ times more rapidly than in air.

Sound travels about _________ times faster in water than in air.

The first color lost in the spectrum upon descent during a dive is _____.

If you are diving wearing an exposure suit, you should _____ to safely control buoyancy as you descend.
add air to your buoyancy device

Your body weight does not affect your buoyancy.

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.

During descent, a diver’s buoyancy tends to _____.

Atmospheric pressure at sea level is:
14.7 pounds per square inch/1.0 atmosphere absolute

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.

Sea water weighs _____ pounds per cubic foot.

Which gas law best explains diving medical problems such as ear and sinus squeeze?
boyles law

What type of pressure is defined as gauge (water) pressure plus atmospheric (air) pressure?

The absolute pressure in the ocean at 53 feet (16 meters) is:
2.6 atmospheres absolute

If a diver’s surface air consumption rate is 25 psi per minute, what would be the consumption rate at 66 feet of seawater?
75 psi per minute

A depth that is equivalent to one atmosphere in the ocean is equal to _________ feet in sea water and _________ feet in fresh water.
33; 34

Two methods of measuring air pressure are BAR or:
pounds per square inch

Pressure in the middle ear is equalized through a part of the body called the:
eustachian tube

A diver’s inability to equalize his/her ears during ascent could cause:
a block or reverse block

A diver with blood and mucous in his/her mask upon surfacing will most likely have:
sinus squeeze

The three general types of injury resulting from lung overexpansion are air embolism, pneumothorax and _____.
tissue emphysema

An irregular breathing pattern (skip breathing) while diving will possibly cause:
carbon dioxide excess

Generally, for maximum efficiency, your breathing should be:
slightly slower and deeper than you normally breathe

To prevent air embolism, a diver should:
breathe normally at all times during ascent and never hold breath

Your first dive of the day is planned for a depth of 18 meters (60 feet), begins at 9:30 a.m., and lasts for 23 minutes. The actual depth of the dive is 16.7 meters (55 feet). You make a precautionary decompression stop at 5 meters (15 feet) for 3 minutes, you surface at 9:56 a.m. and remain out of the water until 10:40 a.m. Your next dive is to a depth of 15 meters (50 feet) for 23 minutes. You make a precautionary decompression stop at 5 meters (15 feet) for 3 minutes. You surface at 11:06 a.m. and have a SIT of 1 hour and 50 minutes. At 12:56 p.m., you begin your third dive to a planned depth of 12 meters (40 feet), but you end up reaching a depth of 13.7 meters (45 feet) with an ADT of 30 minutes. You make a precautionary decompression stop at 5 meters (15 feet) for 3 minutes and you surface from the third dive at 1:29 p.m. What is your final Letter Group?

Your first dive of the day begins at 8:00 a.m. and is to a depth of 18 meters (60 feet) for 31 minutes. You make a precautionary decompression stop at 5 meters (15 feet) for 3 minutes. The second dive begins at 10:05 a.m., is to a depth of 16.8 meters (55 feet), and lasts for 24 minutes. You make a precautionary decompression stop at 5 meters (15 feet) for 3 minutes and surface at 10:32 a.m. Your third dive, which begins at 12:36 p.m., is to 15 meters (50 feet) for 31 minutes. You make a precautionary decompression stop at 5 meters (15 feet) for 3 minutes. What time do you surface from this dive and what is your Letter Group?
1:10, I

Your first dive is to 18 meters (60 feet) for 30 minutes followed by a 30-minute SIT. The second dive is to 15 meters (50 feet) for 30 minutes. What is your Letter Group after the second dive?

Your first dive is to 17 meters (56 feet) for 31 minutes and it is followed by a 1 hour SIT. The second dive is to 16 meters (52.5 feet). What is the AMDT for the second dive? What is your Letter Group if you reach the AMDT?
19, I

After the second dive in problem 4, how long a SIT is required to make a 25-minute dive to 15 meters (50 feet) without exceeding the AMDT? What is your Letter Group following the third dive if your ADT is 25 minutes?

As a NAUI-trained diver, you should ascend at a rate of 9 meters (30 feet) per minute when you use a dive computer regardless of the manufacturer’s instructions.

If you are making repetitive dives, you are limited to a depth of ______.
30 meters (100 ft)

It is recommended that you not consume alcohol within _____ hour(s) of a planned dive.

Immediately upon reaching the dive site, you should:
observe conditions

When planning and executing a dive, it is important for diving buddies to:
agree on a dive leader

You should have a contingency plan for:
each step of your dive plan

On a NAUI Logbook page, the _____ box on the upper right side is used to keep track of your cumulative bottom time.

Which of the following limits should be established prior to every scuba dive?
max bottom time, max depth, min air pressure

Which of the following will help to prevent seasickness?
settle yourself in a midway point of the boat

A diver experiencing panic should:
stop, rest and breathe slowly and deeply until you recover

Continued loss of body heat in cold water will produce:
muscle cramps, progressive immobility, and insensiblity to pain

To relieve a cramp in the calf:
bend the toe of the fin toward the knee to strech the muscle

Which of the following most readily provides assistance to a diver?
the diving buddy

Most diving problems occur _____.
at the surface

Whenever possible, it is best to talk a distressed diver through solving their own minor difficulties.

To render first aid for venomous fish wounds:
flush the wound to clean, soak in hot water, and obtain medical attention

The first aid for sea stings, such as those from jellyfish is:
the application of a stinging neutralizing agent

Appropriate first aid measures for air embolism and DCS includes:
lie victim down, maintain circulation and respiration, administer 02

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

______ is a worldwide emergency network of hyperbaric chambers and diving physicians.
Divers Alert Network (DAN)

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:
contact an active, preferably NAUI, instructor in boston and dive with him or her

Which of the following is an example of an overhead environment?

Which of the following is an example of a man-made site?

Which of the following is an example of a natural site?
coral reef

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

A thermocline is a thin zone of radical change in water _____.

Which of the following affect visibility?
bottom comp, season, water movement

_____ is the underwater movement of water caused by wave action that you will experience when diving in areas close to shore.

The predictable daily rise and fall of the ocean at a single point is called:
the tide

Most surface waves are caused by:

It is recommended that a dive team diving from an anchored boat have:
a trail line 30 meters long with a buoy at the end

It is recommended that a dive team diving from an anchored boat begin their dive:
against the prevailing current

Currents which suddenly appear and disappear are:

Almost all injuries from aquatic life are caused by _____ action on the part of the animal.

If you are careless about your buoyancy control, you can break off pieces of coral or rub off its protective coating.

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.

Local dive clubs are an excellent way to:
meet new divers, get info about local diving area, and introduce new diving activities

Which of the following are NAUI-Sanctioned Specialty Courses?
underwater photo, night diver, and underwater ecologist

Newly certified divers who desire additional training and an orientation to a variety of diving sites and conditions should take a NAUI _____.
advanced scuba diver course

There are many opportunities to work as a diving professional.

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