SDI Open Water 106 Questions With 100% Correct Answers
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Course
SDI
Institution
SDI
What will be the volume in a ball that is filled with two cubic feet of air at 99 feet when it's taken to the surface? - ️️8 cubic feet
When a scuba diver holds his/her breath on ascent, he/she may:
(A) Experience decompression sickness
(B) Rupture his/her lungs
(C) Suffer an air embolism
...
What will be the volume in a ball that is filled with two cubic feet of air at 99
feet when it's taken to the surface? - ✔ ✔ 8 cubic feet
When a scuba diver holds his/her breath on ascent, he/she may:
(A) Experience decompression sickness
(B) Rupture his/her lungs
(C) Suffer an air embolism
(D) Die - ✔ ✔ (B) Rupture his/her lungs
(C) Suffer an air embolism
(D) Die
When diving from the shore, the best time to dive is when there is the least
amount of tidal current. XXX tide is when there is no horizontal water
movement. - ✔ ✔ Slack
When planning a repetitive dive, the _________ diver should be made first. - ✔
✔ deeper
Which gas causes extreme headache and nausea, and in high enough
concentrations causes unconciousness and the lips and fingernails to turn
bright red? - ✔ ✔ Carbon Monoxide
,Which gas component in air causes decompression sickness and narcosis? -
✔ ✔ Nitrogen
Why should you avoid consuming drugs or alcohol prior to a dive? - ✔ ✔
The use of alcohol and drugs greatly increases the risk of decompression
sickness in divers.
With a weight belt, the excess length should be XXX inches - ✔ ✔ 4-6
inches
What sets SDI (Scuba Diving International) apart from other diving training
agencies? - ✔ ✔ The first agency to offer entry-level instruction that
incorporates the use of dive computers.
What should a diver do to alleviate the symptoms of nitrogen narcosis? - ✔
✔ Ascend normally until you no longer feel the affects
What should you do any time the second stage is out of your mouth? - ✔
✔ Put the back up in your mouth then do either a sweep or reach technique
to get it back.
What should you do if visual distortion underwater causes you to become
disoriented or dizzy? - ✔ ✔ Grab hold of a stationary object and wait.
Once you have regained your sense of direction, continue with the dive.
What should you do if you become entangled underwater? - ✔ ✔ Do not
struggle. Move back the way you came to try to untangle yourself. If you have
a knife cut yourself out. If you do not have a knife wait for someone who does
to come cut you out.
, What should you do if you experience a reverse block upon ascending? - ✔
✔ Descend a few feet until the pain subsides. Wait a few moments. Then,
ascend again.
What should you do if you experience discomfort in your ears while
descending? - ✔ ✔ Stop descent, ascend a few feet. Equalize, then
descend again.
What should you do if you hear a boat overhead? - ✔ ✔ Because sound
travels differently in water it's difficult to tell the distance or direction of the
source of sounds.
*Describe two important features of a weight system.* - ✔ ✔ 1. To weigh
you down
2. You can use different weights
A cylindar should be visually inspected at least XXX a year and hydrostatically
tested every XXX years in the United States. - ✔ ✔ 1. once a year 2.
every five years
A properly weighted scuba diver should float at _____________ when her BCD is
deflated and lungs are fully inflated. - ✔ ✔ eye level
A snorkel is a required piece of equipment. What side of the mask does a
snorkel belong on? Why? - ✔ ✔ The Left Side. Because your regulator
goes on the right side and you don't want the snorkel to get in the way.
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