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✅ SSI SCUBA Open Water Diving Certification Study Guide | 100% Correct Answers | Verified, Exams of Workplace Safety

University of California - Santa BarbaraWorkplace Safety

Get certified with confidence using this verified 2025/2026 SSI SCUBA Open Water Study Guide. Learn why equalization is vital for pressure balance, understand that body heat is lost 25 to 30 times faster in water than air, and master key metrics like 4 ata of absolute pressure at 99 feet in salt water. Ideal for first-time divers and certification candidates aiming for total mastery. Português: Guia de estudo SSI com respostas sobre pressão, perda de calor e equalização para mergulhadores. Español: Guía verificada de buceo SSI sobre presión, pérdida de calor corporal y técnicas de compensación. Italiano: Guida allo studio con risposte corrette sulla pressione assoluta, equalizzazione e sicurezza in immersione. Tags: SSI scuba guide, equalization in diving, 4 ata at 99 ft, heat loss underwater, diving certification, UCSB, verified 2025

Typology: Exams

2024/2025

Available from 06/10/2025

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SSI SCUBA Open Water Diving Certification
Study Guide | 100% Correct Answers |
Verified | Latest Version
The purpose of equalization is to - ✔✔Introduce additional air into body air spaces in response to
increasing external pressure
Body heat is lost ________ than in air - ✔✔25 to 30 times faster
The absolute pressure expressed in terms of atmospheres absolute at 99 feet in salt water - ✔✔4 ata
One atmosphere of pressure is defined as - ✔✔
- Each 34 feet of depth in freshwater
- 1 ata
- Each 33 feet of depth in sea water
Describing diving with the acronym SCUBA came from what event? - ✔✔The development of the
demand regulator in 1943
Sinus squeeze can be prevented by - ✔✔Not diving with a cold
The greatest relative pressure change in sea water takes place between ___ and ___ feet - ✔✔0 and 33
Underwater, the bending of light rays causes objects to appear to be: - ✔✔closer
Ear squeeze can be prevented by: - ✔✔- Relaxing
- Never diving with a cold
- Rotating the jaw, swallowing, or Valsalva
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Download ✅ SSI SCUBA Open Water Diving Certification Study Guide | 100% Correct Answers | Verified and more Exams Workplace Safety in PDF only on Docsity!

SSI SCUBA Open Water Diving Certification

Study Guide | 100% Correct Answers |

Verified | Latest Version

The purpose of equalization is to - ✔✔Introduce additional air into body air spaces in response to increasing external pressure Body heat is lost ________ than in air - ✔✔25 to 30 times faster The absolute pressure expressed in terms of atmospheres absolute at 99 feet in salt water - ✔✔4 ata One atmosphere of pressure is defined as - ✔✔

  • Each 34 feet of depth in freshwater
  • 1 ata
  • Each 33 feet of depth in sea water Describing diving with the acronym SCUBA came from what event? - ✔✔The development of the demand regulator in 1943 Sinus squeeze can be prevented by - ✔✔Not diving with a cold The greatest relative pressure change in sea water takes place between ___ and ___ feet - ✔✔0 and 33 Underwater, the bending of light rays causes objects to appear to be: - ✔✔closer Ear squeeze can be prevented by: - ✔✔- Relaxing
  • Never diving with a cold
  • Rotating the jaw, swallowing, or Valsalva

Earplugs... - ✔✔should never been worn while diving If you experience pain in your ears during descent: - ✔✔Stop the descent and ascend until the pain stops Which of the statements concerning sound transmission underwater is correct? - ✔✔- Divers find it difficult to locate the direction of a sound producing source

  • Sound will travel farther underwater than in air
  • Sound travels four times faster underwater than in air The absolute pressure expressed in terms of atmospheres absolute at 33 feet in sea water is - ✔✔2 ata If a flexible air-filled container has a volume of 40 cu ft on the surface, what would the volume be at 99 feet in sea water? - ✔✔10 cu ft Gauge pressure is defined as: - ✔✔Absolute pressure minus one The condition in which certain colors are diminished as depth increases is called: - ✔✔Absorption your Delivery system should be serviced and preformance checked: - ✔✔every year The purpose of a BC is to: - ✔✔Control ascent and descent rates, maintain neutral buoyancy during the dive, provide surface flotation The Buoyancy Control System components are: - ✔✔buoyancy compensator, inflation device, and weight belt A scuba cylinder must be hydrostatically tested: - ✔✔Within fixed interval set by local law

Which of the following over expansion injuries can be characterized by swelling in the neck area with a crackling sensation upon touching the swollen area? - ✔✔Subcutaneous emphysema The most serious lung overexpansion injury is: - ✔✔Aretrial Gas Embolism Which of the following would be inappropriate treatment for a diver exhibiting symptoms of Decompression Sickness? - ✔✔taking the victim back underwater The best prevention for decompression sickness is to: - ✔✔Plan your dive and dive your plan In air at 1 ata, the partial pressure of nitrogen is___, oxygen is_____. - ✔✔0.79/0.21 ata Decompression sickness occurs when: - ✔✔-A diver stays at depth for too long or surfaces too quickly

  • Excess nitrogen bubbles into the blood and tissues
  • nitrogen tissue tolerance gradient is exceeded Diving at altitude or flying after diving: - ✔✔Requires special diving computer functions, altitude tables and/or refraining from flying from at least 24 hours after the completion of a dive The proper first aid for Arterial Gas Embolism, subcutaneous emphysema, pneumothorax, and mediastinal emphysema is: - ✔✔-watch vital signs
  • treat for shock
  • CPR
  • Administer oxygen
  • seek recompression chamber The term gradient can be described as: - ✔✔The difference between the internal partial pressure and the external partial pressure of a gas.

Over expansion injuries can be prevented by: - ✔✔-Learning correct breathing patterns

  • Dive with a properly maintained Total Diving System
  • Never holding your breath Haldanes theory that the human body can withstand a 2:1 pressure difference was revised by D Workman to a nitrogen ratio of: - ✔✔1.58: Other symptoms of decompression sickness include: - ✔✔-paralysis and loss of manual dexterity
  • numbness
  • itchy skin The rate at which the body becomes saturated with nitrogen: - ✔✔will vary based on blood flow to the body Gas can enter the bloodstream and cause serious damage to the lungs or even death by: - ✔✔-holding your breath while diving
  • diving with respiratory congestion
  • ascending too fast The transfer of oxygen and nitrogen into the bloodstream occurs through the walls of the: - ✔✔Alveoli The most common symptom of decompression sickness is: - ✔✔Joint pain If a flexible air-filled container at 100 feet of sea water has a volume of 10 cu ft, what would be the volume if it were transported to the surface? - ✔✔40 cu ft repetitive dive- - ✔✔any dive started more than 10 min. and less than 12 hours after a previous scuba dive

The recommended max ascent rate is: - ✔✔30 feet per minute Residual nitrogen is defined as: - ✔✔Residual nitrogen is the amount of excessive nitrogen dissolved in our bloodstream and tissues after a dive and all previous dives in a series Rip currents are formed by: - ✔✔water breaks over sand bars and reefs near the beach and recedes through channels or cuts in the bars and reefs It is OK to share a computer with your dive buddy (T/F) - ✔✔false a good diving buddy - ✔✔- makes diving more fun

  • is able to help in all phases of diving and dive planning
  • is as familiar with their buddy's equipment as they are with their own Which of the following steps should be taken in the selection of a dive site: - ✔✔- honest evaluation of your diving abilities and conditioning levels, as well as those of your buddy
  • purpose of the dive
  • degree of difficultly presented by the site Examples of freshwater marine life include: - ✔✔-bass
  • crayfish
  • eels Divers should avoid contact with corals because: - ✔✔-touching coral can damage equipment
  • contact can damage coral
  • contact can be harmful to divers When diving in Marine Protected Areas, divers should: - ✔✔Respect and follow local Marine Park regulations

Two examples of hard corals are: - ✔✔Elkhorn & Staghorn If a diver is injured by harmful sea life it is often because: - ✔✔-the diver's aggressive behavior

  • the diver's ignorance
  • the divers negligence Two examples of soft corals are - ✔✔black and red coral The ocean is an important source of life because: - ✔✔it is home to many of the first links in earth's food chain Coral reefs are formed by: - ✔✔coral animals called polyps that form skeletal structures Divers can help protect the marine environment by: - ✔✔-swim neutrally buoyant at all times.
  • Keep your equipment secured to you
  • Always be a responsible diver. More than ___ of Earth's oxygen is produced by marine plants. - ✔✔85% A dependent action to take in response to an out of air emergency is: - ✔✔Sharing air using the primary second stage and using the alternate air source for yourself Signs of a panicked diver are - ✔✔wide-eyed, fearful look and a fast erratic breathing pattern The first thing you should do if you observe sign of panic in a diver at the surface - ✔✔Completely fill your BC and instruct the panicked to establish positive buoyancy The SSI responsibile diver code states that you should - ✔✔-accept resonsibility for you rown well-being on every dive