NAUI SCUBA DIVER EXAM QUESTIONS
WITH CORRECT ANSWERS
When selecting a face mask, the most important thing to consider is: - Answer-Proper
seal and fit.
Snorkels over 15 inches in length are not recommended primarily because: - Answer-
They have too much dead air space.
When buying or renting scuba equipment for diving, Space the most pertinent
consideration is - Answer-it's fit on your body
When rinsing a regulator it is best to - Answer-leave the regulator attached to the tank
four have the dust cat in place
Diving equipment should be - Answer-rinse thoroughly, dried and stored in a cool place.
Scuba tank should always have some pressure and then to prevent - Answer-moisture
from entering.
According to the Department of Transportation regulations, scuba tanks must be
hydrostatically tested every - Answer-5 years
Open heel fins are usually the sense of choice for scuba divers because - Answer-they
may be used in a wide variety of environmental conditions.
The primary purpose of the exposure suit is to - Answer-preserve heat during dives.
Weighting systems are used by the diver primarily to - Answer-offset the positive
buoyancy created by the wet suit.
You should have your regulator serviced by certified repair technician - Answer-at least
once per year.
The stage of the regulator, which reduces tank pressure, is - Answer-the first stage.
Two types of materials that scuba tanks are made from our steel and - Answer-
aluminum.
The ___________ line is the direction of travel line on the compass - Answer-lubber
The dive knife is used primarily as a ___________ for digging, cutting, pounding, and
prying - Answer-Tool
, Stamped (engraved) markings on scuba tanks include - Answer-date of hydrostatic test,
serial number, and type of material.
Atmospheric pressure at sea level is - Answer-14.7 pounds per square inch/1.0
atmosphere absolute
A seal balloon filled with air that has a volume of 6 in.³ at 99 feet will have a volume of
______ at 33 feet - Answer-12 in.³
Seawater weighs - Answer-64.0 pounds per cubic foot
Which gas law best explains diving medical problems such as ear and sinus squeeze -
Answer-Boyles Law
Because every fraction, objects underwater appear ___________ and ______ when the
diver is looking through his or her mask - Answer-larger; closer
When the pressure of nitrogen is balanced between the air and your body, you are at a
state of - Answer-equilibrium
A divers body heat is lost through conduction (primarily) at a rate of approximately
___________ times more rapidly than an air - Answer-25
What type of pressure is defined as gauge (water) pressure plus atmospheric (air)
pressure - Answer-absolute
The absolute pressure in the ocean at 53 feet is - Answer-2.6 atmospheres absolute
If a diverse surface air consumption rate is 2.5 PSI per minute, what would be the
consumption rate at 66 feet of seawater - Answer-75 PSI per minute
A depth that is equivalent to one atmosphere in the ocean is equal to ___________ feet
in seawater and __________ feet and fresh water - Answer-33; 34
Two methods of measuring air pressure are BAR or - Answer-pounds per square inch
Sound travels about _____ times faster in water than in air - Answer-4
The first color lost in the spectrum upon descent during dives is - Answer-red
Pressure and the middle ear is equalized through a part of the body called the - Answer-
Eustachian tube
Breathing dry air, a scuba diver tends to become dehydrated while diving due to -
Answer-moisturizing dry inhaled air
WITH CORRECT ANSWERS
When selecting a face mask, the most important thing to consider is: - Answer-Proper
seal and fit.
Snorkels over 15 inches in length are not recommended primarily because: - Answer-
They have too much dead air space.
When buying or renting scuba equipment for diving, Space the most pertinent
consideration is - Answer-it's fit on your body
When rinsing a regulator it is best to - Answer-leave the regulator attached to the tank
four have the dust cat in place
Diving equipment should be - Answer-rinse thoroughly, dried and stored in a cool place.
Scuba tank should always have some pressure and then to prevent - Answer-moisture
from entering.
According to the Department of Transportation regulations, scuba tanks must be
hydrostatically tested every - Answer-5 years
Open heel fins are usually the sense of choice for scuba divers because - Answer-they
may be used in a wide variety of environmental conditions.
The primary purpose of the exposure suit is to - Answer-preserve heat during dives.
Weighting systems are used by the diver primarily to - Answer-offset the positive
buoyancy created by the wet suit.
You should have your regulator serviced by certified repair technician - Answer-at least
once per year.
The stage of the regulator, which reduces tank pressure, is - Answer-the first stage.
Two types of materials that scuba tanks are made from our steel and - Answer-
aluminum.
The ___________ line is the direction of travel line on the compass - Answer-lubber
The dive knife is used primarily as a ___________ for digging, cutting, pounding, and
prying - Answer-Tool
, Stamped (engraved) markings on scuba tanks include - Answer-date of hydrostatic test,
serial number, and type of material.
Atmospheric pressure at sea level is - Answer-14.7 pounds per square inch/1.0
atmosphere absolute
A seal balloon filled with air that has a volume of 6 in.³ at 99 feet will have a volume of
______ at 33 feet - Answer-12 in.³
Seawater weighs - Answer-64.0 pounds per cubic foot
Which gas law best explains diving medical problems such as ear and sinus squeeze -
Answer-Boyles Law
Because every fraction, objects underwater appear ___________ and ______ when the
diver is looking through his or her mask - Answer-larger; closer
When the pressure of nitrogen is balanced between the air and your body, you are at a
state of - Answer-equilibrium
A divers body heat is lost through conduction (primarily) at a rate of approximately
___________ times more rapidly than an air - Answer-25
What type of pressure is defined as gauge (water) pressure plus atmospheric (air)
pressure - Answer-absolute
The absolute pressure in the ocean at 53 feet is - Answer-2.6 atmospheres absolute
If a diverse surface air consumption rate is 2.5 PSI per minute, what would be the
consumption rate at 66 feet of seawater - Answer-75 PSI per minute
A depth that is equivalent to one atmosphere in the ocean is equal to ___________ feet
in seawater and __________ feet and fresh water - Answer-33; 34
Two methods of measuring air pressure are BAR or - Answer-pounds per square inch
Sound travels about _____ times faster in water than in air - Answer-4
The first color lost in the spectrum upon descent during dives is - Answer-red
Pressure and the middle ear is equalized through a part of the body called the - Answer-
Eustachian tube
Breathing dry air, a scuba diver tends to become dehydrated while diving due to -
Answer-moisturizing dry inhaled air
