PADI OPEN WATER EXAM Questions and Answers Latest Updates 2024., Exams of Nursing

Download PADI OPEN WATER EXAM Questions and Answers Latest Updates 2024. and more Exams Nursing in PDF only on Docsity! PADI OPEN WATER EXAM Questions and Answers Latest Updates 2024 When is an object positively buoyant? - correct answerWhen it displaces a volume of water weighing more than its own weight. (it floats) When is an object negatively buoyant? - correct answerWhen it displaces a volume of water weighing less than its own weight. (it sinks) When is an object neutrally buoyant? - correct answerWhen it displaces a volume of water weighing the same as its own weight. (it stays in place) Why two pieces of equipment do you use to control your buoyancy? - correct answerBCD, Weights What does buoyancy help with when you are underwater? - correct answerControlling where you are What does buoyancy help with when you are at the surface? - correct answerFloatation, conserving energy How does the buoyancy of an object differ in fresh/salt water? - correct answerMore buoyant in salt than fresh When you exhale what happens? - correct answerLung volume decreases so you have less buoyancy. When you inhale what happens? - correct answerLung volume increases so you have more buoyancy. Why don't you feel air pressure? - correct answerYour body is primarily liquid, which is incompressible and distribute pressure equally throughout your whole body. Where are some air spaces located in the body? - correct answerEars, sinuses, lungs Do you always feel the pressure in body air spaces? - correct answerOnly if the pressure is different inside and outside the air spaces. 1 bar is what depth? - correct answer0m/0ft 2 bar is what depth? - correct answer33ft/10m 3 bar is what depth? - correct answer66ft/20m 4 bar is what depth? - correct answer99ft/30m How is air volume affected when depth is increased? - correct answerIt decreases How is air density affected when depth is increased? - correct answerIt increases What happens if you take an air volume underwater with you in a flexible container or inverted jar? - correct answerAs pressure increases the volume decreases, same air but smaller space. How do you maintain air volume as you descend? - correct answerEqualize What is a "squeeze"? - correct answerAs volume decreases, pressure pushes body tissues inwards toward air space, causing discomfort. Pressure outside air space is more than pressure inside air space. Where can you get a squeeze? - correct answerEars, sinuses, mask, lungs, teeth How do you equalise air spaces in ears? - correct answerBlow and squeeze nose, wiggle jaw, swallowing How often should you equalize? - correct answerEvery metre before discomfort 3 types of valves - correct answerK, J, DIN What is the J valve - correct answerhas built in mechanism that signals when you are low on air What is K valve - correct answersimple on/off valve What is DIN valve - correct answerScrew regulator into valve What is the O-ring - correct answerLocated in valve, when cylinder and regulator connect forms air tight seal (O-ring) What are cylinders made of - correct answerAluminum and steel How often should the cylinder be inspected - correct answerAt least once a year What are hydrostatic tests? - correct answerTests expansion of cylinder in high pressure environment What is the normal full pressure of a scuba tank? - correct answer200 bar Parts of regulator - correct answerFirst stage Second stages Dust cover Purge Button What is first stage? - correct answerConnect A regular redues high pressure cylinder air is ___ steps? - correct answer2 Second stage? - correct answerBreathing source Paul's second rule - correct answerAlways dive with a buddy Paul's third rule - correct answerSlowly ascent from all dives Paul's 4th rule - correct answerHave fun How often does regulator be tested? - correct answerAnnually When you rinse the regulator don't.. - correct answerPress purge, no dust cap SPG shows: - correct answerHow much air you have during dive As you descend colors go from... - correct answerRed -- blue Sound travels father in __ than in ___ - correct answerwater, air Sounds travels __ times faster in water than air - correct answer4 Water conducts heat about __ times faster than air does - correct answer20 Hypothermia - correct answerbody cools so much it can't function When you're underwater things appear - correct answerlarger and closer Water absorbs light so... - correct answerit gets darker when you go deeper and colors become less vivid Underwater, sounds seem to come from ... - correct answeroverhead When you shiver - correct answerGet out of water and dry off and seek warmth Symptoms of overexertion include - correct answerrapid breathing anxiety a feeling of suffocation To prevent overexertion: - correct answerpace yourself, know your limits, avoid prolonged heavy exertion If you become overexerted - correct answerstop all activity and rest 75% heat loss in body occurs in - correct answerhead Important part of weight system is the - correct answerright hand release If you're properly weighed you will - correct answerfloat at eye level with an empty BCD and holding a normal breath Low pressure inflator allows for - correct answerinflation/deflation of BCD How to check your buddy - correct answerBegin With Review And Friend Where do you attach alternate air source? - correct answerWithin the triangle Underwater conditions that affect a diver include" - correct answersunlight temperature water movement bottom composition 3. Ascend using a controlled emergency swimming ascent 4. Buoyant emergency ascent Uses for a dive float include - correct answerAssisting another diver resting supporting a dive flag carrying accessories You should use a dive flag because - correct answerit warns off boaters local law may require it The rule of thumb is that you should stay within ___ of your dive flag, and boaters should stay ___ away. - correct answer15 metres, 30-60 metres Collecting bags are useful for - correct answercollecting under water garbage carrying several objects are once Underwater lights are taken down on day dives because they - correct answerrestore lost colors, are used to look in cracks and crevices Carry a slate with you in order to communicate, carry info. T/F - correct answerTrue Air is made up of - correct answernitrogen and oxygen Symptoms of contaminated air include - correct answerheadache, nausea, cherry red lips/nail beds If a diver has contaminated air you should - correct answergive the diver fresh air, give the diver oxygen, reach medical attention Symptoms of nitrogen narcosis include - correct answerfalse sense of security, foolish behavior, anxiety If nitrogen narcosis occurs - correct answerascend to a shallower depth To prevent narcosis - correct answerdon't go on deep dives Two factors influencing how much nitrogen you absorb include - correct answerdive time and depth Secondary factors that influence nitrogen absorption include - correct answeralcohol consumption, dehydration, age, being overweight Symptoms of decompression sickness - correct answerlimb and joint pain mild tingling and fatigue paralysis and unconsciousness ' Decompression illness implies - correct answerboth decompression sickness and lung over expansion injuries If you have decompression illness you should - correct answerhave emergency oxygen lie on left side if unresponsive contact local emergency medical care contact local diver emergency service Why do you take safety stops - correct answerTo give your body time to eliminate nitrogen, to allow you to stabilise and control your ascent The recommended general depth and time for a safety stop is: - correct answer5 metres for 3 minutes Safety stop is required when - correct answeryou dive to 30 metres or deeper you reach the limit on your table your dive comes within three pressure groups of an NDL on the RDP If you exceed your no decompression limit by less than 5 minutes you should - correct answerascend to 5 meters, wait 8 minutes, don't dive for 6 hours If you exceed your no decompression limit by more than five minutes you should - correct answerascend to 5 metres, wait 15 minutes, don't dive for 24 hours If you exceed the no decompression limit of your dive computer you should - correct answermake an emergency decompression stop You should plan your dive __ metres ___ in cold conditions - correct answer4m deeper Parts of compass - correct answerindex marks magnetic north needle bezel lubber line How do you navigate a straight line with a compass - correct answerPoint the lubber in your travel direction, put the index marks over the compass needle. To navigate a reciprocal heading, rotate the bezel so the ___ are exactly opposite the initial heading. - correct answerindex marks