Science of Diving Final, SCUBA, SSI Open Water Diver Final Exam Questions and Answers

What are the two dive flags - Answer- Recreational Diving and Alpha Flag 1982 - Answer- When did OSHA exempt scientific diving from commercial diving The absolute pressure expressed in terms of atmospheres absolute at 33 feet in sea water is: -A: 2 ata -B:1 ata -C: 4 ata -D: 3 ata - Answer- A: 2 ata What will the buoyancy of an object be (positive, neutral, or negative) if it displaces an amount of water: a. more than its own weight? b. less than its own weight? c. equal to its own weight? - Answer- a. positive b. negative c. neutral AAUS - Answer- American Academy of Underwater Sciences Gauge pressure is defined as: -A: Hydrostatic pressure minus 1 ata -B: The pressure at the surface -C: The depth reading on a gauge -D: Absolute pressure minus 1 ata - Answer- D: Gauge pressure is defined as Absolute pressure minus 1 ata What is purpose of first stage - Answer- to reduce cylinder pressure to immediate pressure and keep that pressure as constant as possible Define Scientific Diving - Answer- Diving performed solely as a necessary part of a scientific, research, or educational activity by employees whose sole purpose for diving is to perform scientific research tasks When does squeeze in the ear occur - Answer- When the presure outside the ear is greater than the pressure inside the ear The first symptom of a sinus squeeze is usually: -A: a dull pain deep within the head -B: a sharp pain at the base of the neck -C: a crushing pain high in the chest -D: a sharp pain above the eyes - Answer- D: a sharp pain above the eyes What is the relationship between increasing and decreasing depth and water pressure? - Answer- With increasing depth the water pressure increases. With decreasing depth the water pressure decreases. If you experience pain in the ear during descent: -A: Stop the descent and ascend till the pain stops -B: abort the dive -C: place a finger in the ear canal and gently massage the ear until the pain ceases -D: continue the descent while gently exhaling into the mask - Answer- A: Stop the descent and ascend till the pain stops. Body heat is lost at a rate of ___ than air. - Answer- 25-30 times faster What year was the petition by United Brotherhood Carpenters and Joiners of America AFL-CIO with respect to diving operations filed? - Answer- 1975 The ultimate responsibility for safe diving procedures rests with the ... - Answer- individual diver Proper equalization techniques must be learned in order to: -A: prevent sinus squeeze -B: prevent ear pain -C: prevent squeeze injuries -D: all answers are correct - Answer- D At what depth does the greatest expension occur - Answer- 4 feet What are the absolute pressures, air volume, and air density in atmospheres, for: a. 10m/33ft b. 20m/66ft b. 30m/99ft c. 40m/132ft - Answer- a. 2 bar/ata, 1/2, x 2 b. 3 bar/ata, 1/3, x 3 c. 4 bar/ata, 1/4, x4 d. 5 bar/ata, 1/5, x5 In what year did OSHA exempt scientific diving from commercial diving regulations? - Answer- 1982 The purpose of equalization is to: -A: ensure the uneven application of pressure between the water and air spaces in the body -B: prevent water from entering air spaces in the body -C: introduce additional air into body air spaces in response to increasing external pressure -D: remove all fluids from body air spaces - Answer- C: introduce additional air into body air spaces in response to increasing external pressure True or false: One of the requirements for meeting the scientific diving exemption to OSHA commercial diving regulations is that the majority of members of an organization's Diving Control Board must be active scientific divers - Answer- True Who fought to obtain a scientific diving exemption in 1975 with a petition filed with OSHA - Answer- United Brotherhood of Carpenters and Joiners of America The three primary features to look for in a quality Exposure System are: - Answer- Thickness, fit, & seam integrity Under what two conditions did OSHA exempt scientific diving from commercial diving regulations? - Answer- Diving Safety Manual and Diving Control (Safety) Board An object immersed in water will be buoyed upward by a force ______ to the weight of the water it displaces. - Answer- equal What is the relationship between air volume and density, and how do they vary according to this relationship when pressure increases or decreases? - Answer- Air volume and density change proportionately with pressure. As pressure increases, air volume decreases, and air density increases. As pressure decreases, air volume increases, and air density decreases. A high pressure scuba cylinder should be stored: -A: secured with a minimum of 500 to 750 psi -B: lying flat with no air -C: with the valve slightly open to allow air expansion -D: secured with the valve open - Answer- A: A high pressure scuba cylinder should be stored secured with a minimum of 500 to 750 psi What do you do if you have problems equalizing your ears - Answer- stop your descent, go up a few feet to lessen the pressure and slowly try your descent again. At what level should we be concern with nitrogen narcois - Answer- It is recommended that recreational divers stay above 100 feet/ 30 meters One of the primary factors contributing to heat loss for divers is: