Exam (elaborations)
NAUI Scuba Exam Questions and Answers
- Course
- Institution
NAUI Scuba Exam Questions and Answers
[Show more]
Content preview
NAUI Scuba Exam Questions andAnswers
Cold water diving - Answer -70 degrees or colder
What is the best protection to avoid body heat loss? - Answer -dry suit
water conducts heat away from the body _____ times faster than air - Answer -25
What does being underwater affect? - Answer -vision, hearing, density, buoyancy,
temperature
How is vision affected underwater? - Answer -1. refraction - makes objects look bigger
and closer
2. absorption - shortwave lengths (ROY G BIV) lose color in that order
How is hearing affect underwater? - Answer -1. sound travels faster
2. sound becomes omnidirectional
Sound travels __ times faster underwater - Answer -4
What is the radius of a dive flag - Answer -100ft
water is ____ times denser than air - Answer -800
Will you be more buoyant in saltwater or freshwater? - Answer -saltwater
Why are you more buoyant in saltwater? - Answer -Saltwater is denser than fresh so
you have to go deeper to reach the same pressure (33ft compared to 34.5ft)
Steel tanks are ____ than aluminum - Answer -better
True or false: a properly weighted diver should float with their lungs full and sink with
their lungs empty - Answer -True
On land what is the pressure? in atm and psi - Answer -1 atm = 14.7 psi
, Boyle's Law - Answer -inverse relationship between pressure and volume
Including 1 atm at the surface, what is the pressure at 8ft underwater? - Answer -(using
~30ft = 1 atm = 15 psi) (aka 2ft = 1 psi)
15psi (1 atm on land) + 4psi (underwater) = 19psi
True or fasle: you can theoretically rupture your ears at 8ft - Answer -True
What are the seven types of squeezes? - Answer -Ears, lungs, sinsuses, mask, dry suit,
stomach/instines, teeth
How can you fix a squeeze/ - Answer -equalize pressure by adding air
What are two types of reverse squeezes? - Answer -sinuses can fill with blood, stomach
can create a gaseous accumulation
1/2 psi = - Answer -1 ft depth
What is the cause of a lung over expansion injury? - Answer -holding your breath and
ascending
What is the prevention of a lung over expansion injury? - Answer -breathe normally
What are the four medical conditions of a lung over expansion? (from least to worst) -
Answer -Pneumothorax, mediastinal emphysema, subcutaneous emphysema, cerebral
air embolism
Pneumothorax - Answer -air starts to build under your rib cage from a collapsed lung
Pneumothorax symptoms - Answer -pain in your side, difficulty breathing, blood in your
spit
mediastinal emphysema - Answer -rip in lungs under your sternum
mediastinal emphysema symptoms - Answer -squeezing in chest (think its a heart
attack), pink foam (aerated spit)
subcutaneous emphysema - Answer -rip in the top part of lungs, air rises in chest
subcutaneous emphysema symptoms - Answer -visible air bubbles under skin around
your neck and shoulders, feels like choking, vocal changes, difficulty breathing
Cerebral air embolism - Answer -aka "divers stroke"
air blockage to brain
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 millyphilip. 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)
78998 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now