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