At a minimum, while diving, most dive computers display: - Answer-Maximum depth, current depth, actual bottom time, remaining allowable bottom time.
Which of the following is an essential feature to consider when selecting a diving mask? - Answer-Tempered or safety glass
Snorkels over 15 inch...
NAUI SCUBA Exam Questions with
Latest Update
At a minimum, while diving, most dive computers display: - Answer-Maximum depth,
current depth, actual bottom time, remaining allowable bottom time.
Which of the following is an essential feature to consider when selecting a diving mask?
- Answer-Tempered or safety glass
Snorkels over 15 inches (38 centimeters) in length are not recommended primarily
because: - Answer-They have too much dead air space.
When buying or renting equipment for diving, the most important consideration is: -
Answer-Its fit on your body.
When rinsing a regulator it is best to: - 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: - 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: - 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: - Answer-5 years
The most important functional feature of a weight belt or weight system is: - Answer-A
means for ditching the weights immediately with one hand.
The primary purpose of the exposure suit is to: - Answer-Preserve body heat during
dives.
You should have your regulator serviced by a certified repair technician: - Answer-At
least once per year.
The stage of the regulator which reduces tank pressure is: - Answer-first
Two types of materials that scuba tanks are made from are 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
Markings on scuba tanks include: - Answer-Date of hydrostatic test, serial number, type
of material.
Atmospheric pressure at sea level is: - 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). - Answer-
8 liters
The weight of freshwater is: - Answer-62.4 pounds per cubic foot (1000 kg/m3).
Air, the gas most commonly used by recreational scuba divers, is composed of: -
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? - Answer-Refraction
Sound travels approximately how many times faster in water than in air? - Answer-4
A diver's body heat is lost through conduction (primarily) at a rate of approximately
_________ times more rapidly than in air. - Answer-25
Which of the following actions should a diver take to reduce drag and therefore the
amount exertion during a dive? - Answer-Streamline his/her body position.
The absolute pressure in the ocean at 53 feet (16.15 m) is: - Answer-2.6 atmospheres
absolute (2.6 bar).
If a diver's surface air consumption rate is 30 psi per minute (2.1 bar per minute), what
would be his/her consumption rate at 66 feet (20.11 m) of seawater? - Answer-90 psi
per minute (6.2 bar per minute).
A depth that is equivalent to one atmosphere in the ocean is equal to _________ feet
(meters) in seawater and _________ feet (meters) in freshwater. - Answer-33; 34
(10.06;10.36)
Two methods of measuring air pressure are BAR or: - Answer-PSI
Which of the following describes the term "positive buoyancy"? - Answer-An object
displaces an amount of water weighing more than itself.
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