NAUI Final Exam with Accurate
Solutions
When selecting a face mask, most important thing to consider is - ANS-proper seal and
fit
When buying or renting equipment for diving the most important consideration is - ANS-
it fits your body
Open heel fins are usually the fins of choice for scuba divers because: - ANS-They may
be used in a wide variety of environmental conditions
factors that can affect the breathing ease of a snorkel are: - ANS-Length and Diameter
A reciprocal course is made when your outbound course is a straight line and halfway
through your dive you make a ____ turn - ANS-180
Because of refraction, objects underwater appear _________ and _________ when the
diver is looking through his/her mask. - ANS-larger/closer
A diver's body heat is lost through conduction (primarily) at a rate of approximately
_________ times more rapidly than in air. - ANS-25
The first color lost in the spectrum upon descent during a dive is _____. - ANS-red
sound travels about ____ times faster in water than in air - ANS-4
during descent, a divers buoyancy tends to - ANS-decrease
if you are diving wearing an exposure suit, you should ____ to safely control buoyancy
as you descend - ANS-add air to your buoyancy device
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. - ANS-False
Your body weight does not affect your buoyancy - ANS-False
Which gas law best explains diving medical problems such as ear and sinus squeeze? -
ANS-Boyles law
, If a diver's surface air consumption rate is 1.72bar (25 psi) per minute, what would be
the consumption rate at 20meteres (66 feet) of seawater? - ANS-5.16 bar per minute 75
psi per minute
Two methods of measuring air pressure are BAR or: - ANS-pounds per square inch
A depth that is equivalent to one atmosphere in the ocean is equal to _________ feet in
sea water and _________ feet in fresh water. - ANS-10m 33 feet ; 10.4 34 feet
in the ocean a sealed balloon filled with air that has a volume of 98 cubic centimeters 6
cubic inches at 30 meters 99 feet will have a volume of ____ at 10 meters 33 feet -
ANS-196 cubic centimeters 12 cubic inches
Sea water weighs ___ kilograms per liter or ___ pounds per cubic foot - ANS-1.025 /
64.0
atmospheric pressure at sea level is: - ANS-1.0 bar / 14.7 pounds per square inch/1.0
atmosphere absolute
The absolute pressure in the ocean at 16 meters 53 feet is - ANS-2.6 atmospheres
absolute
what type of pressure is defined as gauge water pressure plus atmospheric air pressure
- ANS-absolute
A diver with blood and mucous in his/her mask upon surfacing will most likely have: -
ANS-sinus squeeze
A divers inability to equalize his/hers ears during ascent could cause - ANS-A block or
reverse block
Pressure in the middle ear is equalized through a part of the body called the: - ANS-
eustachian tube
the three general types of injury resulting from lung overexpansion are air embolism,
pneumothorax and _________ - ANS-tissue emphysema
to prevent air embolism a diver should - ANS-Breathe normally at all times during
ascent and never hold his/her breath
A regular breathing pattern while diving would be: - ANS-slightly slower and deeper than
you normally breathe
An irregular breathing pattern (skip breathing) while diving will possibly cause: - ANS-
carbon dioxide excess
Solutions
When selecting a face mask, most important thing to consider is - ANS-proper seal and
fit
When buying or renting equipment for diving the most important consideration is - ANS-
it fits your body
Open heel fins are usually the fins of choice for scuba divers because: - ANS-They may
be used in a wide variety of environmental conditions
factors that can affect the breathing ease of a snorkel are: - ANS-Length and Diameter
A reciprocal course is made when your outbound course is a straight line and halfway
through your dive you make a ____ turn - ANS-180
Because of refraction, objects underwater appear _________ and _________ when the
diver is looking through his/her mask. - ANS-larger/closer
A diver's body heat is lost through conduction (primarily) at a rate of approximately
_________ times more rapidly than in air. - ANS-25
The first color lost in the spectrum upon descent during a dive is _____. - ANS-red
sound travels about ____ times faster in water than in air - ANS-4
during descent, a divers buoyancy tends to - ANS-decrease
if you are diving wearing an exposure suit, you should ____ to safely control buoyancy
as you descend - ANS-add air to your buoyancy device
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. - ANS-False
Your body weight does not affect your buoyancy - ANS-False
Which gas law best explains diving medical problems such as ear and sinus squeeze? -
ANS-Boyles law
, If a diver's surface air consumption rate is 1.72bar (25 psi) per minute, what would be
the consumption rate at 20meteres (66 feet) of seawater? - ANS-5.16 bar per minute 75
psi per minute
Two methods of measuring air pressure are BAR or: - ANS-pounds per square inch
A depth that is equivalent to one atmosphere in the ocean is equal to _________ feet in
sea water and _________ feet in fresh water. - ANS-10m 33 feet ; 10.4 34 feet
in the ocean a sealed balloon filled with air that has a volume of 98 cubic centimeters 6
cubic inches at 30 meters 99 feet will have a volume of ____ at 10 meters 33 feet -
ANS-196 cubic centimeters 12 cubic inches
Sea water weighs ___ kilograms per liter or ___ pounds per cubic foot - ANS-1.025 /
64.0
atmospheric pressure at sea level is: - ANS-1.0 bar / 14.7 pounds per square inch/1.0
atmosphere absolute
The absolute pressure in the ocean at 16 meters 53 feet is - ANS-2.6 atmospheres
absolute
what type of pressure is defined as gauge water pressure plus atmospheric air pressure
- ANS-absolute
A diver with blood and mucous in his/her mask upon surfacing will most likely have: -
ANS-sinus squeeze
A divers inability to equalize his/hers ears during ascent could cause - ANS-A block or
reverse block
Pressure in the middle ear is equalized through a part of the body called the: - ANS-
eustachian tube
the three general types of injury resulting from lung overexpansion are air embolism,
pneumothorax and _________ - ANS-tissue emphysema
to prevent air embolism a diver should - ANS-Breathe normally at all times during
ascent and never hold his/her breath
A regular breathing pattern while diving would be: - ANS-slightly slower and deeper than
you normally breathe
An irregular breathing pattern (skip breathing) while diving will possibly cause: - ANS-
carbon dioxide excess
