NAUI UPDATED Exam Questions and
CORRECT Answers
Which of the following is an essential feature to consider when selecting a dive mask? -
CORRECT ANSWER- Tempered or safety glass
Snorkels over 15 inches (38 cm) in length are not recommended primarily because: -
CORRECT ANSWER- They have too much dead air space
When buying or renting equipment for diving, the most important consideration is: -
CORRECT ANSWER- Its fit on your body
When rinsing a regulator it is best to: - CORRECT ANSWER- Leave the regulator attached
to the tank or have the dust cap in place
Three features that are common to all buoyancy control devices are: - CORRECT ANSWER-
An overpressure relief 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
be hydrostatically tested every: - CORRECT ANSWER- 5 years
The most important functional feature of a weight belt or weight system is: - CORRECT
ANSWER- A means for ditching the weights immediately with one hand
The primary purpose of the exposure suit is to: - CORRECT ANSWER- Preserve body heat
during dives
At a minimum, while diving, most dive computers display: - CORRECT ANSWER-
Maximum depth, current depth, actual bottom time, remaining allowable bottom time
, You should have your regulator serviced by a certified repair technician: - CORRECT
ANSWER- At least once per 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. -
CORRECT ANSWER- Tool
Markings on scuba tanks include: - CORRECT ANSWER- Date of hydrostatic test, serial
number, type of material
Atmospheric pressure at sea level is: - CORRECT ANSWER- 14.7 pounds per square
inch/1.0 atmosphere absolute (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 a volume of _______ liters at 33 feet of seawater (10.1 m). - CORRECT
ANSWER- 8
The weight of freshwater is: - CORRECT ANSWER- 62.4 pounds per cubic foot
(1000kg/m3) (multiply psi by 144)
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 a dive? - CORRECT ANSWER- Refraction
CORRECT Answers
Which of the following is an essential feature to consider when selecting a dive mask? -
CORRECT ANSWER- Tempered or safety glass
Snorkels over 15 inches (38 cm) in length are not recommended primarily because: -
CORRECT ANSWER- They have too much dead air space
When buying or renting equipment for diving, the most important consideration is: -
CORRECT ANSWER- Its fit on your body
When rinsing a regulator it is best to: - CORRECT ANSWER- Leave the regulator attached
to the tank or have the dust cap in place
Three features that are common to all buoyancy control devices are: - CORRECT ANSWER-
An overpressure relief 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
be hydrostatically tested every: - CORRECT ANSWER- 5 years
The most important functional feature of a weight belt or weight system is: - CORRECT
ANSWER- A means for ditching the weights immediately with one hand
The primary purpose of the exposure suit is to: - CORRECT ANSWER- Preserve body heat
during dives
At a minimum, while diving, most dive computers display: - CORRECT ANSWER-
Maximum depth, current depth, actual bottom time, remaining allowable bottom time
, You should have your regulator serviced by a certified repair technician: - CORRECT
ANSWER- At least once per 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. -
CORRECT ANSWER- Tool
Markings on scuba tanks include: - CORRECT ANSWER- Date of hydrostatic test, serial
number, type of material
Atmospheric pressure at sea level is: - CORRECT ANSWER- 14.7 pounds per square
inch/1.0 atmosphere absolute (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 a volume of _______ liters at 33 feet of seawater (10.1 m). - CORRECT
ANSWER- 8
The weight of freshwater is: - CORRECT ANSWER- 62.4 pounds per cubic foot
(1000kg/m3) (multiply psi by 144)
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 a dive? - CORRECT ANSWER- Refraction
