SDI Open Water Scuba Diver Exam Questions and Answers.
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Course
SDI Open Water
Institution
SDI Open Water
SDI Open Water Scuba Diver Exam Questions and Answers.SDI Open Water Scuba Diver Exam Questions and Answers.SDI Open Water Scuba Diver Exam Questions and Answers.
SDI Open Water Scuba Diver Exam Questions and
Answers.
Objects under water appear - Correct Answer Closer and larger than they do on land
How much faster does sound travel in water, compared to air? - Correct Answer 4 times
Water conducts heat away from your body - Correct Answer 25 times faster than air
does
As you descend - Correct Answer colors fade, reds and oranges fade first, 30 meters
seem blue and gray
water temp does your body need thermal protection - Correct Answer 86 degrees
What does SCUBA mean - Correct Answer self-contained underwater breathing
apparatus
When water stratifies itself into layers, according to temperature, the boundary between
layers is known as a(n):
1: Halocline.
2: Ichtyocline.
3: Thermodyne.
4: Thermocline. - Correct Answer Thermocline
What is the primary cause of waves? - Correct Answer wind
Which of the following factors do we take into account when measuring waves? -
Correct Answer Height, Length
Which of the following is incorrect? - Correct Answer Waves are not hazardous to divers
during shore dives
The consequences of becoming cold under water include the following except - Correct
Answer improved judgment and coordination
Because sound travels faster under water: - Correct Answer Its harder to determine the
direction from which a sound is coming
Entering through surf requires special skills. These skills are often included in beginning
scuba course taught in areas in which surf entries are common - Correct Answer true
which of the following are true - Correct Answer Surge is the back-and-forth movement
of water caused by passing over head
, Which of the following are true - Correct Answer The sun warming water near the
equator, coupled with the earth's rotation, is the primary cause of permanent ocean
currents
despite its apparent warmth, divers in warm waters still need to consider to wear
protection - Correct Answer true
longshore currents always move in the same direction as prevailing offshore currents -
Correct Answer false
a rip current is a narrow flow of swiftly moving water that runs parallel to shore - Correct
Answer false
the trick to dealing with surge is to anticipate its action in order to avoid contact with
stationary objects - Correct Answer true
what is the most effective way to get out of a rip current - Correct Answer swim parallel
to shore, until out of current
the best time to dive is during a slack tide - Correct Answer true
we pose greater threat to underwater plants and animals - Correct Answer true
what causes most marine life injuries - Correct Answer animals defense response and
mistaken identity
what ability best helps helps you avoid damage to the fragile aquatic environment -
Correct Answer buoyancy control
all of the following steps can you take to avoid scrapes and abrasions, except: - Correct
Answer wear minimal exposure protection
some aquatic animals possess stinging cells. These are called: - Correct Answer
Nematocysts
marine animals bites almost always the result of the animal defending itself - Correct
Answer true
always stay within your level of experience. As an open water diver you should not
venture in overhead environment such as a cave - Correct Answer true
The states of buoyancy include all of the following except - Correct Answer Passive
a scuba cylinder that normally lasts one hour at the surface will last ___ minutes at 20
meters - Correct Answer 20
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