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NAUI OPEN WATER ELEARNING CERTIFICATION EXAM ACTUAL EXAM 150 QUESTIONS AND CORRECT DETAILED ANSWERS WITH (VERIFIED ANSWERS) |ALREADY GRADED A+ $27.49
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NAUI OPEN WATER ELEARNING CERTIFICATION
EXAM 2024-2025 ACTUAL EXAM 150 QUESTIONS AND
CORRECT DETAILED ANSWERS WITH (VERIFIED
ANSWERS) |ALREADY GRADED A+
A reciprocal course is made when your outbound course is a
straight line and halfway through your dive you make a _____
turn. - ANSWER- 180 degrees
The first color lost in the spectrum upon descent during diving is
___. - ANSWER- red
A diver's body heat is lost through conduction (primarily) at a
rate of approximately ____ times more rapidly than in air. -
ANSWER- 25
Sound travels about _____ times faster in water than in air -
ANSWER- 4
because of refraction, objects underwater appear _____ & _____
when the diver is looking through his or her mask. - ANSWER-
larger; closer
,2|Page
Your body weight does not affect your buoyancy. T or F -
ANSWER- False
If you are diving wearing an exposure suit, you should _____ to
safely control buoyancy as you descend. - ANSWER- add air to
your buoyancy device
During descent, a diver's buoyancy tends to _____. - ANSWER-
decrease
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. T or
F - ANSWER- False
if a divers surface air consumption rate is 1.72 bar (25 psi) per
minute, what would be the consumption rate at 20 meters (66
feet) of seawater? - ANSWER- 5.16 bar per minute (75 psi per
minute)
a sealed balloon filled with air that has volume of 6 cubic inches
at 99 feet will have a volume of _____ cubic inches at 33 feet -
ANSWER- 12
, 3|Page
What type of pressure is defined as gauge (water) pressure plus
atmospheric (air) pressure)? - ANSWER- Absolute
Atmospheric pressure at sea level is: - ANSWER- 1.0 bar / 14.7
pounds per square inch / 1.0 atmospheric absolute
Which gas law best explains diving medical problems such as
ear and sinus squeeze? - ANSWER- Boyle's law
The absolute pressure in the ocean at 16 meters (53 feet) is: -
ANSWER- 2.6 atmospheres absolute
A depth that is equivalent to one atmosphere in ocean is equal to
____ in sea water and ____ in fresh water - ANSWER- 10 m (33
feet) ; 10.4 m (34 feet)
Two methods of measuring air pressure are BAR or: -
ANSWER- pounds per square inch
Sea water weighs __ kg per liter or ___ pounds per cubic foot -
ANSWER- 1..0
Pressure in the middle ear is equalized through a part of the
body called the: - ANSWER- eustachian tube
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