SCUBA, SSI Open Water Diver Final Exam 2023

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 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 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 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 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 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 The three primary features to look for in a quality Exposure System are: - Answer- Thickness, fit, & seam integrity An object immersed in water will be buoyed upward by a force ______ to the weight of the water it displaces. - Answer- equal 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 One of the primary factors contributing to heat loss for divers is: -A: Absorption -B: Convection -C: Diffusion -D: Refraction - Answer- B: One of the primary factors contributing to heat loss for divers is Convection The Information System components are: A: Dive Computer B: Analogue Instruments C: SSI DiveLog D: All the above - Answer- D: All of the above (Dive Computer, Analogue Instruments, & SSI DiveLog) The purpose of a BC is to: - Answer- -Provide surface floatation -Maintain neutral buoyancy during the dive -Control ascent and descent rates Under the SSI Equipment Service Program, your Delivery System should be serviced and performance checked: -A: every 3 years -B: every 5 years -C: every month -D: every year - Answer- D: 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. - Answer- 2 times During normal diving activities, divers should never exceed an ascent rate of __ feet per minute. - Answer- 30 A scuba tank for recreational diving should be filled with: -A: A mixture of helium and oxygen -B: Pure, filtered compressed air or Nitrox -C: A mixture of hydrogen and oxygen -D: pure oxygen - Answer- B: A scuba tank for recreational diving should be filled with Pure, filtered compressed air or Nitrox The rate at which the body becomes saturated with nitrogen: -A: will vary based on factors, such as depth and blood supply to a particular area of the body -B: is always the same rate -C: is slower at the beginning of the process and faster at the end of the process -D: is faster t the beginning of the process and slower at the end of the process - Answer- A: will vary based on factors, such as depth and blood supply to a particular area of the body The transfer of oxygen and nitrogen into the bloodstream occurs through the walls of the: -A: Arteries