PADI Open Water Diver Final Exam 2024 | Questions with 100% Correct Solutions

PADI Open Water Diver Final Exam 2024 | Questions with 100% Correct Solutions When diving in Marine Protected Areas like Marine Parks, divers should: - ansRespect and follow the local marine park regulations Divers can help protect the marine environment by: - ans-Maintaining neutral buoyancy at all times -Keep equipment secured and no dangling -always being a responsible diver Examples of freshwater marine life include: - ans-Bass -Crawfish -Eel In an out of air emergency and your buddy is close enough, you should: - ansswim to your buddy, give the out of air signal and share air The first thing you should do if you observe signs of panic in a diver underwater is: - anslocate your alternate air source in case it is needed. Panic can be prevented by: - ans-Honestly evaluating your diving limitations -Properly maintaining your total diving systenm -Taking specialty training The SSI Responsible Diver Code states that you should: - ans-Dive within the limits of your training and ability -be environmentally responsible on every dive -Accept responsibility for your own well-being on every dive The most important rule when assisting a panicked diver is: - ansNever needlessly endanger yourself An independent action to take in response to an out of air emergency is: - ansA Controlled Swimming Ascent or emergency buoyancy ascent The lungs can only withstand an overpressure of approximately______ - ans2 psi. (Pressure changes by 0.5 psi per foot in seawater (0.5 psi x 4 feet = 2 psi)). Which of the following overexpansion injuries can be characterized by swelling in the neck area with a crackling sensation upon touching the swollen area? -A: Arterial gas Embolism -B: Mediastinal emphysema -C: Pneumothorax -D: Subcutaneous emphysema - ansD: Subcutaneous emphysema Dalton's Law can be paraphrased as: - ansThe total pressure of a mixture of gases equals the sum of the partial pressures Water comprises about ______ of the Earth's surface. - ans72% Signs of a panicked diver are: - ansWide-eyed, fearful look and a fast and erratic breathing pattern 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 - ansA: 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 -B: Bronchiole trees -C: Alveoli -D: Blood vessels - ansC: Alveoli The most serious lung over-expansion injury is: -A: Arterial gas Embolism -B: Mediastinal emphysema -C: Pneumothorax -D: Subcutaneous emphysema - ansA: Arterial gas Embolism The term gradient can be described as: - ansThe 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: -A: bends -B: Subcutaneous emphysema -C: Mediastinal emphysema and Pneumothorax -D: Rupture of the eardrum - ansC: Mediastinal emphysema and Pneumothorax In air at 1 ata, the partial pressure of nitrogen is___, oxygen is_____. -A: .21/.79 ata -B: 1.5/.8 ata -C: .79/.21 ata -D: .8/.4 ata - ansC Gas can enter the bloodstream and cause serious damage to the lungs or even death by: -A: ascending to fast -B: holding your breath underwater -C: diving with respiratory congestion -D: all answers are correct - ansD:All of the above (ascending to fast , holding your breath underwater, and/or diving with respiratory congestion) The term No-decompression Limit is defined as: Maximum time at _____ without having to perform a ______ decompression stop during the _____ - ansdepth, mandatory, ascent To use a compass to navigate to a sighted object: Point the compass toward the object, rotate the ____ until the ____ marks are over the magnetic needle, and follow the ____ line. - ansbezel, witness, lubber A dive computer keeps track of a diver's nitrogen absorption levels so that the diver can: -A: Avoid an Arterial gas Embolism -B: Stay within the no decompression limits on each dive -C: dive deeper than 100 feet -D: Make decompression dives - ansB: 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 - ansTrue What is a surface interval? The amount of ___ the diver stays ____ of the water or on the ____ _____ dives - anstime, out, surface between 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 - ans- Absolute pressure minus 1 ata Gauge pressure is defined as: - ansabsolute 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 - ans- Not diving with a cold The absolute pressure expressed in terms of atmospheres absolute at 33 feet in sea water is: - ans2 ATA Remember: ATA increases by 1 every 33ft depth in saltwater Ear squeeze can be prevented by: - ans-Relaxing - Never diving with a cold - rotating the jaw, swallowing or Valsalva The greatest relative pressure change in sea water takes place between ____ and ____ feet. - ans0/33ft 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 or wedging sensation above the eyes - ans-A sharp pain or wedging sensation above the eyes Sinus squeeze can be prevented by: - ansNot diving with a cold Relaxing rotating jaw, light blowing out of plugged nose If you experience pain in the ear during descent: -Stop the descent and ascend till the pain stops - abort the dive -place a finger in the ear canal and gently massage the ear until the pain ceases - continue the descent while gently exhaling into the mask - ans-Stop the descent and ascend till the pain stops Body heat is lost at a rate of ___ than air. - ans25-30 times faster Salt water weighs ___ pounds per cubic foot and freshwater weighs ___ pounds per cubic foot. - ans64/62.5