SDI Scuba Certification Exam 2024
Questions with Correct Detailed
Solutions || Graded A+
Buoyancy is - ANSWER when fluid pushes up on an object
immersed in it.
Archimedes' Principle states: - ANSWER "An object floating or
immersed in a liquid will be buoyed up by a force equal to the
...
Buoyancy is - ANSWER ✔ when fluid pushes up on an object
immersed in it.
Archimedes' Principle states: - ANSWER ✔ "An object floating or
immersed in a liquid will be buoyed up by a force equal to the
weight of the volume of the liquid displaced."
The denser the liquid, the higher a given object will float, and the
heavier the liquid, the greater the buoyancy.
Positive buoyancy: - ANSWER ✔ An object that weighs less than
the weight of the liquid it displaces will float.
Negative buoyancy: - ANSWER ✔ An object that weighs more
than the weight of the liquid it displaces will sink.
Neutral buoyancy: - ANSWER ✔ An object that weighs equal to
the weight of the liquid it displaces will remain neutral, neither
sinking nor floating.
buoyancy system has two main parts: - ANSWER ✔ the
Buoyancy Compensator (BC) and the weight system.
, Neutral buoyancy allows you to - ANSWER ✔ maneuver
effortlessly and consume less air. Suspended in liquid space you
are neither descending nor ascending.
BCs are equipped with - ANSWER ✔ an inflator for orally inflating
and deflating the BC. You can also inflate your BC with a power
inflator attached to the first stage by pressing a button to
introduce air into your BC. As well, you can deflate your BC with a
pull dump valve.
14 steps to assembling your equipment in the correct sequence: -
ANSWER ✔ 1. Pre-soak your BC strap to prevent the cylinder
from becoming loose underwater.
2. Face the cylinder valve away from you.
3. Place your BC to the proper height of the cylinder by using the
height adjustment strap (if available).
4. Secure your BC to the cylinder.
5. Check and inspect the cylinder O-ring or DIN fitting O-ring for
cuts.
6. Standing behind the cylinder, position your Delivery System
with the primary regulator over the right side and the alternate
regulator and Information System on the left side and gently
tighten.
7. Before turning on the breathing gas, check the primary
regulator and alternate by inhaling gently — you should not be
able to breathe.
8. Attach the power inflator hose to your BC.
,9. Face your Information System down and away from you and
close to the cylinder.
10. Turn the breathing gas on slowly all the way and then turn
back a half-turn.
11. Inflate your BC fully, check the function of pressure relief and
dump valves, leave your BC fully inflated and monitor for possible
leakage and release air after successful leak test.
12. Check the performance of your regulators and the quality of
breathing gas by pressing the purge valve. Clean breathing gas is
colorless, odorless, and make sure they are working properly.
13. Once complete, place your Delivery and Information System
inside your BC and secure it by laying the unit down.
14.For disassembling, simply reverse the order to take apart. The
only difference is turning the breathing gas off. Once the
breathing gas is off, it is necessary to purge all breathing gas from
the Delivery System before removing it from the cylinder.
Simplified- 1. Place the BC on the Cylinder2. Attach the Delivery
System to the Cylinder3. Attach the Power Inflator Hose to the
BC4. Turn the Breathing Gas on and test the Second Stage
Regulator
Three Basic Rules to Scuba Diving - ANSWER ✔ The First Rule
of Scuba: Breathe continuously!
The Second Rule of Scuba: Ascend slowly and maintain control!
The Third Rule of Scuba: Never dive alone or beyond your level
of training!
, During normal diving activities, divers should never exceed an
ascent rate of __ feet per minute. - ANSWER ✔ 30 ft
Your lungs are made up of - ANSWER ✔ approximately 300
million alveoli
Dalton's Law - ANSWER ✔ the total pressure of a mixture of
gases equals the sum of the partial pressures.
Henry's Law states - ANSWER ✔ the amount of gas that will
dissolve into a liquid is directly proportional to the partial pressure
of the gas.
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