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

University of California - Santa BarbaraWorkplace Safety

Ace your SSI Open Water Final with this expert-approved 2025/2026 answer set. Learn why divers do not find it easy to talk directly through water, the science behind underwater acoustics, and how absolute pressure at 33 feet equals 2 ata. Includes everything you need to master dive theory, safety procedures, and environmental factors critical to passing your exam and staying safe underwater. Português: Respostas corretas sobre som e pressão subaquática para aprovação no exame SSI. Español: Claves sobre sonido y presión en buceo verificadas para el examen final SSI. Italiano: Risposte corrette su trasmissione del suono e pressione a 10 metri per l’esame SSI. Tags: SSI Open Water answers, scuba sound physics, absolute pressure diving, 2 ata at 33 ft, UCSB, verified 2025

Typology: Exams

2024/2025

Available from 06/10/2025

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SSI Open Water Final Exam | 100% Correct
Answers | Verified | Latest Version
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:
1
pf3
pf4
pf5
pf8
pf9

Partial preview of the text

Download ✅ SSI Open Water Final Exam | 100% Correct Answers | Verified 2025/2026 and more Exams Workplace Safety in PDF only on Docsity!

SSI Open Water Final Exam | 100% Correct

Answers | Verified | Latest Version

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:
  • Stop the descent and ascend till the pain stops
  • abort the dive

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
  • is always the same rate
  • is slower at the beginning of the process and faster at the end of the process

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%