Exam (elaborations)
SDI Certification Exam Review Graded A+
- Course
- Institution
SDI Certification Exam Review Graded A+
[Show more]
Content preview
SDI Certification Exam Review Graded A+As pressure increases - ANSWER-Volume decreases
Cylinders should be visually inspected ____ a year and hydrostatically tested every
____ years - ANSWER-Once; five
Define no-stop time - ANSWER-Amount of time remaining at any point during the dive
before a necessary decompression stop
Define risk management - ANSWER-Way of preventing problems and planning a
response to any emergency
Describe the function of regulator first stage and second stage - ANSWER-First stage -
attaches to tank valve and reduces the high-pressure air to intermediate pressure
Second stage - delivers air at ambient pressure directly to the diver
Describe the symptoms of DCS - ANSWER-Rash from bubbles in skin capillaries, joint
pain, difficulty inhaling, loss of sensation, paralysis, could be fatal
Describe two important features of a weight system - ANSWER-Quick release
mechanism, evenly-dispersed lead
Global currents are _____.
Local currents ____. - ANSWER-Fixed
Fluctuate
How do you conduct a safety stop? - ANSWER-Conducted at 15 ft for 3-5 minutes
before surfacing
How do you determine a time limit a repetitive dive from a PDC? - ANSWER-Surface
mode shows depths ranging every ten feet with the no-stop time limits adjusted for
current depth
How do you know if your mask fits correctly? - ANSWER-Will tighten to your face and
won't fall off via suction through your nose
How do you treat a sting? - ANSWER-Hot water or vinegar
How many times more dense is air in a balloon at 4 atm compared to the air density at
the surface? - ANSWER-4 times
How much air should remain in your cylinder upon completing a dive? - ANSWER-500
psi
, How much faster does sound move through water than air and why? - ANSWER-4
times faster in water
Water is 800x denser than air; sound travels through denser mediums at faster rates
How much larger and closer do objects appear under water and why? - ANSWER-33%
larger, 25% closer
Light bends in the air-space between the lens and your eyes.
How often should you equalize during descent? - ANSWER-Early and often; at the
surface and then every couple feet so no discomfort is felt
How to do alleviate the symptoms of nitrogen narcosis? - ANSWER-Ascend normally
until you no longer feel effects
How to treat a diver with decompression sickness - ANSWER-Bring diver to surface,
seek immediate medical attention, administer pure oxygen, place person in pressure
chamber
If a scuba cylinder lasts two hours at sea level, how long will it last at 20 m/66 ft? -
ANSWER-40 min
If you are caught in a rip current, first swim _____ to the current to get out of it before
swimming towards shore. - ANSWER-Perpendicular
Injuries due to marine life typically a _____ response - ANSWER-Defense
List five factors that can predispose a diver to decompression sickenss - ANSWER-
Illness, ascending too fast, dehydration, smoking, alcohol consumption
List the four functions of a dive computer - ANSWER-Depth, dive time, ascent rate,
surface interval time
List the three important scuba diving changes that occurred in the 1950s - ANSWER-1)
Dive tables published for repetitive dives
2) Improved design/quality of scuba gear
3) Dive computers commercially available
List three different reasons that it is advisable to check with your local dive center before
diving in an unfamiliar area. - ANSWER-1) Rip currents could be prevalent
2) Thermoclines could affect thermal protection
3) YOU ARE SUBJECT TO LOCALITY (be aware of laws and regulations
List two feelings of being "narked" - ANSWER-Euphoric, anxious
Long shore current - ANSWER-Flows parallel to shore
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller CLOUND. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $10.99. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
77254 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now