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AAUS Test Review. For Scubanauts International. Here’s what to do:. Get out a piece of paper and something to write with Make a heading of each section : Dive equipment Diving physics Diving physiology Diving environment Dive planning and execution Diving skills Emergency skills

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Aaus test review

AAUS Test Review

For Scubanauts International

Here s what to do
Here’s what to do:

  • Get out a piece of paper and something to write with

  • Make a heading of each section :

    • Dive equipment

    • Diving physics

    • Diving physiology

    • Diving environment

    • Dive planning and execution

    • Diving skills

    • Emergency skills

    • SNI diving program

      Record your answers and check them at the end of the presentation. If you get some wrong, try again!

Dive equipment

Dive Equipment

Section 1


*According to the Department of Transporation (DOT)

Diving physics

Diving Physics

Section 2


  • 1% carbon dioxide

  • .934% inert gas


  • 75 psi/min


  • 37 min


  • 15


  • 3.0 ATA


  • 3.87 liters


  • 4


  • Partial pressure


  • orange


Breathing dry air, a scuba diver tends to become dehydrated while diving due to:

Excessive persperation

Moisturizing dry inhaled air

Saltwater absorbing moisture from skin

Extreme energy expended during a dive


Symptoms of nitrogen narcosis are similar to:

Caisson’s disease


Diver’s disease

Alcoholic intoxication


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

Vascular canal

Intravascular tube

Eustachian tube

Semi-circular canal


If your dive buddy complains about having aching pain in his shoulder one hour after the dive, you might suspect:

arterial gas embolism

Decompression sickness

Nitrogen narcosis



An irregular breathing pattern while diving will possibly cause:

Anorexia nervosa

Carbon dioxide excess




The_____ in the air you are breathing limits the time you can stay at depth.

Water vapor



All of the above


The onset of nitrogen narcosis is characterized by:

A clear thought process

Impairment of thought

Inability of sense pleasure

Increased precision in motor skill function


Which symptom is reflective of oxygen toxicity?


Muscular twitching

Bright, red skin

Decreased body core temperature


Generally , for maximum efficiency, your breathing should be…

than you normally breath.

Slightly faster and shallower

The same

Slightly slower and shallower

Slightly slower and deeper


Physical damage to the body resulting from a direct change in pressure is called:






Increases carbon monoxide in the blood

Smoking cigarettes affects a diver in which of the following ways?

Increases tolerance for exercise

Lowers the number of beats per min of heart

Provides greater resistance to decompression sickness


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

Lung squeeze/block

Ear squeeze/block

Sinus squeeze/block

Air embolism


What is the maximum safe ascent rate recommended for scientific diving and required for use of the NAUI dive tables?

90 ft/min.

30 ft/min.

70 ft/min.

60 ft/min.


Breath 100% oxygen during dives

To prevent air embolism, a diver should:

Decompress correctly

Breathe compressed air only

Breathe normally at all times during ascent and never hold his breath.


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


  • When waves break on shore and the backrush is funneled through a narrow opening, the condition is known as:


  • Examples of natural navigation aids divers may use during dives include:


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


  • The horizontal boundary between waters of differing salinity is defined as:


  • If the water conditions are reasonable to make a beach dive, all of the following procedures are suggested except:


  • Scyphozoans, or true jellyfish, possess stinging cells within their tentacles called:


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


  • The distance between successive wave crests is defined as:


  • The first aid for sea stings, such as those from jellyfish is:


A diver with a group letter of “F” making a dive to 60 ft. has a residual nitrogen time of:


Your first dive is to 60 ft for 50 min. You spend 1 hr 40 min on the surface. What is your adjusted maximum dive time at 60 ft?


For optimum no-decompression bottom times, plan repetitive dives so that each successive dive is to ____ depth.


The minimum surface interval recommended between 2 dives is ____ minutes.


The minimum surface interval required to avoid stage decompression after a dive to 88 ft. for 18 min. followed by a dive to 78 ft. for 23 min. is:


Which of the following limits should be established prior to every scuba dive?


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:


The recommended maximum rate of ascent for recreational scuba diving is_____ ?


A dive team conducts a dive to 80 fswfor an actual dive time of 32 min.

What is the minimum time that the same team can stay out during a surface interval and make a repetitive dive to 69 fswfor an actual dive time of 30 min without required decompression?


If a dive is particularly cold and/or strenuous, the dive team should use:


A dive team conducts a dive to 95 fswfor an actual dive time of 20 min.

The team has s surface interval of 2 hrs.

The second dive is conducted to a depth of 60 fswfor an actual dive time of 30 min.

The team then has a surface interval of 1 hr 45 min.

The team plans to make a third dive to a depth of 40 fsw. What is the team’s adjusted max dive time for the third dive?


A dive team executes a dive and accidentally exceeds their planned actual dive time by 5 min. Their actual dive profile was 110ft for 20 min. What required decompression schedule should the team follow during their ascent?


The general advantages of diving nitrox for scientific or recreational diving are:

Diving skills

Diving Skills

Section 6


If you are diving wearing an exposure suit, you should ____ to safely control buoyancy.


No dive plan is complete without:


If it is suspected that the air in a tank is contaminated due to its smell or taste:


Immediately upon reaching the dive site, you should:


A thick wetsuit (e.g. 5mm or 7mm):


Completing any given scuba certification course makes you knowledgeable and skillful enough to dive safely in or at:


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


If during a dive you and your buddy become separated, you should:


Planning safe, successful, and fun dives requires:


A dive team conducting a night dive should have a total of how many lights (minimum) between them?


It is recommended that a dive team diving from an anchored boat have:


It is recommended that a dive team diving from an anchored boat begin their dive:

Emergancy skills

Emergancy Skills

Section 7


If you are diving wearing an exposure suit, you should____ to safely control buoyancy as you descend.


Decompression sickness (DCS) is usually caused by some combination of exceeding recommended time and depth exposure limits along with a possible rapid ascent rate. Some Type II DCS signs/symptoms are characterized by?


_____ is a worldwide emergency network of hyperbaric changers and diving physicians


A diver experiencing anxiety should:


A diver experiencing Arterial Gas Embolism (AGE) usually exhibits signs and symptoms within 5 minutes of surfacing from a dive. These signs/symptoms may include:


Preventing a diving accident begins long before anyone enters the water Important elements to consider prior to any dive in order to minimize the risk of an accident include:


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


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


In an out-of-air situation at depths shallower than 33 ft of seawater (10 meters)if making a shared-air or redundant scuba ascent is not possible, the procedure of choice is:


A diver displaying signs of in-water distress often includes the following signs:


Four main actions you should consider in giving first aid for diving accidents are:


One common sign that accompanies Type I Decompression Sickness is:


When a diver is distressed at the surface, he or she should take the following action:


Continued loss of body heat in cold water will produce:


Scubanauts international (SNI) is an organizational member of AAUS, which is an acronym for:

  • The association for Academic Underwater Scuba diving

  • The American Academy of Underwater Sciences

  • The academy of American Underwater Sciences

  • The Academic Association of Underwater Scientists


SNI diving regulations require which of the following to maintain status as a current qualified diver:

  • At least 6 dives in the last 12 months, and at least one dive to 100 fsw (30 m.)

  • At least 12 dives in the last 12 months, a current approved diving physical, and at least one dive to your maximum level of qualification

  • A certification card (a.k.a. c-card) for open water diver and advanced open water diver

  • None of the above, once you are an SNI diver, you can always dive with SNI


Which of the following is not true of the SNI diver qualification rating system (DIT, D-30, D-60, D-100?)

  • It is not a rank system, and divers may move up or down in the rating based on current skills and need

  • A diver with a D-100 rating is a better diver than a diver with a D-60 rating

  • Every SNI diver should expect to be a D-100 diver when they get enough experience

  • Once you reach a certain qualification level, you can never have your qualification reduced.


With SNI, the ultimate diving authority rests with the :

  • President of SNI

  • SNI Diving Safety Officer (DSO)

  • Diving Control Board

  • Diver in Charge (DIC)


According to SNI regulations, the Diver in Charge (DIC):

  • Must be an adult who is a Divemater, Assistant Instructor, Instructor, or in training for those certifications.

  • Does not have to be in the water for every dive as long as they remain in a supervisory capacity

  • Is designated by the Chapter Diving Safety Officer or SNI DSO as the on-scene leader for a diving operation

  • All of the above


Dive logs are essential to safety and record keeping. On multiday expedition, the team dive log:

  • Must be available on request within 24 hours

  • Is due within two weeks after the end of the trip

  • Must be kept in the open and completed by every diver immediately after each dive

  • Must always use PADI dive tables to record the repetitive group (RG)


Why is SNI an organizational member of AAUS?

  • AAUS provides insurance for diving safety of SNI dive operations

  • AAUS memberships makes SNI safer

  • AAUS offers a high standard and operates under the scientific diving exemption for OSHA requirements of working dives

  • All of the above


SNI divers must maintain current certifications in:

  • Rescue Diver and Advanced Open Water Diver

  • Underwater scientific techniques

  • Equipment and cylinder maintenance

  • CPR, Firs tAid, and Emergency Oxygen Provider


When a diver is distressed a the surface, he or she should take the following action:

  • Descend, make a decompression stop, relax and gain control of breathing

  • Thrash wildly at the surface, deflate his/her BCD and continue diving

  • Stop and signal their buddy, establish positive buoyancy, relax and gain control of breathing

  • Ditch their weight belt or weight system, inflate their buoyancy compensator as full as possible, relax and gain control of breathing.


Continued loss of body heat in cold water will produce:

  • Confusion

  • Progressive immobility

  • Insensibility to pain

  • All of the above

Answers section 1
Answers Section 1

  • proper seal and fit

  • rinsed thoroughly, dried and stored in a cool place

  • They have too much dead air space

  • the k-valve and DIN valve

  • 5 years

  • Moisture from entering

  • piston; diaphragm

  • at least once per year

  • the first stage

  • aluminum and steel

Answers section 2
Answers Section 2

  • 14.7 pounds per square inch (psi)

  • 12 cubic inches

  • 64.0lbs/ft^3; 62.4lbs/ft^3

  • Boyles law

  • 78.04% nitrogen, 20.94% oxygen, 0.33% carbon dioxide, and .934% inert gas

  • 75 psi per minute

  • 37 minutes

  • 25

  • 2.6 ATA

  • 2.87 liters

  • 4

  • partial pressure

  • red

Answers section 3 4
Answers Section 3-4

For this section you will have to look up the answers online! See what you can learn on your own. 

Answers section 5
Answers Section 5

  • 36 minutes

  • 19 min.

  • the shallower

  • 60

  • 3 hrs., 58 min.

  • Maximum bottom time, maximum depth, minimum air pressure.

  • find a local basic diver, plan dives together and perform thorough buddy checks

  • 30ft/min

  • 3 hrs and 10 min

  • The next greater actual dive time to determine your repetitive group letter

  • 69 min

  • A 5 min. stop at 15 ft.

  • Increased bottom time or less residual nitrogen after the dive

Sections 6 8
Sections 6-8

  • See if you can find the answers online!