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✅ SSI Open Water Final Exam Q&A | 100% Correct Answers | Verified 2025/2026, Exams of Workplace Safety

University of California - Santa BarbaraWorkplace Safety

Crush your certification with this fully verified 2025/2026 answer key for the SSI Open Water Final Exam. Know which claim about underwater sound is incorrect (“Divers find it easy to talk directly through water”) and lock in the absolute pressure at 33 ft/10 m—2 ata. Review how sound travels four times faster and farther underwater, why direction-finding is tricky, and refresh the physics that keep you safe at depth. Designed for divers, marine-science students, and safety instructors who demand 100 % accuracy and zero fluff—this guide gives you the critical knowledge to ace theory, boost confidence, and dive smart Português: Resumo verificado sobre som subaquático e pressão absoluta para o exame final SSI. Español: Respuestas exactas sobre transmisión de sonido y presión absoluta para el examen SSI. Italiano: Risposte corrette su trasmissione del suono e pressione a 10 m per l’esame finale SSI SSI open-water exam, sound underwater, absolute pressure 33 ft, scuba physics, UCSB

Typology: Exams

2024/2025

Available from 06/10/2025

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SSI Open Water Final Exam Questions
with 100% Correct Answers | Latest
Version | Verified
Which of the statements concerning sound transmission underwater is incorrect?
-Sound will travel farther underwater then in air
-Divers find it difficult to locate the direction of a sound producing source
-Divers find it easy to talk to each other directly through water
-Sound travels four times faster underwater than in air - ✔✔-Divers find it easy to talk to each other
directly through water
The absolute pressure expressed in terms of atmospheres absolute at 33 feet in sea water is:
-2 ata
-1 ata
- 4 ata
- 3 ata - ✔✔2 ata
The condition in which certain colors are diminished as depth increases is called:
-Refraction
-Turbidity
-Diffusion
-Absorption - ✔✔Absorption
Earplugs
-Aid equalization of the middle of the ear
- Protect against cold
-Should never be worn while diving
-Protect ears from squeeze - ✔✔-Should never be worn while diving
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Download ✅ SSI Open Water Final Exam Q&A | 100% Correct Answers | Verified 2025/2026 and more Exams Workplace Safety in PDF only on Docsity!

SSI Open Water Final Exam Questions

with 100% Correct Answers | Latest

Version | Verified

Which of the statements concerning sound transmission underwater is incorrect?

  • Sound will travel farther underwater then in air
  • Divers find it difficult to locate the direction of a sound producing source
  • Divers find it easy to talk to each other directly through water
  • Sound travels four times faster underwater than in air - ✔✔-Divers find it easy to talk to each other directly through water The absolute pressure expressed in terms of atmospheres absolute at 33 feet in sea water is:
  • 2 ata
  • 1 ata
  • 4 ata
  • 3 ata - ✔✔2 ata The condition in which certain colors are diminished as depth increases is called:
  • Refraction
  • Turbidity
  • Diffusion
  • Absorption - ✔✔Absorption Earplugs
  • Aid equalization of the middle of the ear
  • Protect against cold
  • Should never be worn while diving
  • Protect ears from squeeze - ✔✔-Should never be worn while diving

Gauge pressure is defined as:

  • Hydrostatic pressure minus 1 ata
  • The pressure at the surface
  • The depth reading on a gauge
  • Absolute pressure minus 1 ata - ✔✔- Absolute pressure minus 1 ata Sinus squeeze can be prevented by:
  • Valsalva technique
  • Wearing earplugs
  • Tilting the divers head back and forth
  • Not diving with a cold - ✔✔- Not diving with a cold The event that led to the use of the acronym SCUBA to describe diving was: - ✔✔The development of the demand regulator in 1943 Ear squeeze can be prevented by
  • Relaxing
  • All answers are correct
  • Never diving with a cold
  • rotating the jaw, swallowing or Valsalva - ✔✔-All answers are correct The first symptom of a sinus squeeze is usually:
  • a dull pain deep within the head
  • a sharp pain at the base of the neck
  • a crushing pain high in the chest
  • a sharp pain above the eyes - ✔✔- a sharp pain above the eyes If you experience pain in the ear during descent:
  • each 33ft of depth in saltwater
  • all answers are correct - ✔✔-all answers are correct The three primary features to look for in a quality Exposure System are: - ✔✔Thickness,fit, seam integrity An object immersed in water will be buoyed upward by a force ______ the weight of the water it displaces. - ✔✔equal to A high pressure scuba cylinder should be stored:
  • secured with a minimum of 500 t0 750 psi
  • lying flat with no air
  • with the valve slightly open to allow air expansion
  • secured with the valve open - ✔✔-secured with a minimum of 500 t0 750 psi The most efficient breathing pattern for scuba diving is: - ✔✔deep balanced inhalation followed by long balanced exhalation, without any pause One of the primary factors contributing to heat loss for divers is:
  • Absorption
  • Convection
  • Diffusion
  • Refraction - ✔✔-Convection The Information System components are: - ✔✔Dive Computer, Analogue Instruments, if the Dive Computer does not supply all necessary information and SSI Total DiveLog The purpose of a BC is to:
  • Provide surface floatation
  • Maintain neutral buoyancy during the dive
  • Control ascent and descent rates
  • all answers are correct - ✔✔-all answers are correct Which of the following Total Diving System subsystems best describes the SCUBA?
  • Delivery system
  • Buoyancy system
  • Information system
  • Snorkeling system - ✔✔-Delivery system Under the SSI Equipment Service Program, your Delivery System should be serviced and performance checked:
  • every 3 years
  • every 5 years
  • every month
  • every year - ✔✔-every year Assuming a consistent air consumption rate, diving at a pressure of 4 ata will use __ as much air as diving at 2 ata. - ✔✔2 times During normal diving activities, divers should never exceed an ascent rate of __ feet per minute. - ✔✔ 30 A scuba tank for recreational diving should be filled with:
  • A mixture of helium and oxygen
  • Pure, filtered compressed air or Nitrox
  • A mixture of hydrogen and oxygen
  • pure oxygen - ✔✔ The rate at which the body becomes saturated with nitrogen:
  • will vary based on factors, such as depth and blood supply to a particular area of the body
  • Treat for shock - ✔✔-Taking the victim back underwater The most serious lung overexpansion injury is:
  • Arterial gas Embolism
  • Mediastinal emphysema
  • Pneumothorax
  • Subcutaneous emphysema - ✔✔-Arterial gas Embolism The term gradient can be described as: - ✔✔The difference between the internal partial pressure and the external partial pressure of a gas Which of the following overexpansion injuries can be characterized by chest pain, breathing difficulties, weakness, and cyanosis (blueness) of the lips and nail beds:
  • bends
  • Subcutaneous emphysema
  • Mediastinal emphysema and Pneumothorax
  • Rupture of the eardrum - ✔✔-Mediastinal emphysema and Pneumothorax In air at 1 ata, the partial pressure of nitrogen is___, oxygen is_____.
  • .21/.79 ata
  • 1.5/.8 ata
  • .79/.21 ata
  • .8/.4 ata - ✔✔- .79/.21 ata Gas can enter the bloodstream and cause serious damage to the lungs or even death by:
  • ascending to fast
  • holding your breath underwater
  • diving with respiratory congestion
  • all answers are correct - ✔✔-all answers are correct

The term No-decompression Limit is defined as: - ✔✔maximum allowed time at depth without having to perform a mandatory decompression stop during the ascent To use a compass to navigate to a sighted object: - ✔✔Point the compass toward the object, rotate the bezel until the witness marks are over the magnetic needle, and follow the lubber line A dive computer keeps track of a diver's nitrogen absorption levels so that the diver can:

  • Avoid an Arterial gas Embolism
  • Stay within the no decompression limits on each dive
  • dive deeper than 100 feet
  • Make decompression dives - ✔✔-Stay within the no decompression limits on each dive You should perform a safety stop at 15 feet for 3 to 5 minutes on every dive. true false - ✔✔true What is a surface interval? - ✔✔The amount of time the diver stays out of the water or on the surface between dives Residual nitrogen is defined as: - ✔✔The amount of excessive nitrogen dissolved in our blood stream and tissues after a dive Two examples of hard coral are: fire and star elkhorn and staghorn sea fan and brain all answers are correct - ✔✔elkhorn and staghorn More than ___ of Earth's oxygen is produced by marine plants. - ✔✔85%