SDI Open Water Scuba Diver Exam
UPDATED ACTUAL Exam Questions and
CORRECT 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
UPDATED ACTUAL Exam Questions and
CORRECT 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
