PADI Open Water Diver Course Final Exam Answers/ PADI Open Water Diver Course Final Updat, Exams of Nursing

Download PADI Open Water Diver Course Final Exam Answers/ PADI Open Water Diver Course Final Updat and more Exams Nursing in PDF only on Docsity! PADI Open Water Diver Course Final Exam Answers/ PADI Open Water Diver Course Final Updated 2023-2024/ PADI Open Water Diver Final Exam Questions and Answers Graded A+ As a newly certified PADI Open Water Diver, I will be trained to dive with a buddy as deep as . ✔Ans✔ 18 metres/60 feet Certain medical conditions can be hazardous while diving, so it is important to answer all questions on the Medical Statement honestly and completely. a. True b. False ✔Ans✔ a. True PADI courses are performance-based. This means that to be certified, I must ✔Ans✔ meet specific performance requirements. Failure to complete assigned independent study can create significant delays, and my instructor may have to cancel and reschedule sessions until I complete the assignment. a. True b. False ✔Ans✔ a. True While diving in a new dive environment, two benefits of seeking an orientation, supervision and/or additional training are that it helps me avoid problems and that it helps me enjoy the dive more. a. True b. False ✔Ans✔ a. True As you descend in water the pressure ✔Ans✔ increases A depth of 10 metres/33 feet causes a pressure change of . ✔Ans✔ 1 bar/ata When I descend, my buoyancy tends to . When I ascend, it tends to . - Breathe slowly and deeply - Do not allow myself to get winded or out-of-breath - If faced with a problem, stop, then maintain or restore slow, deep breathing Buoyancy is a force that pushes an object in water upward. a. True b. False ✔Ans✔ a. True My sunglasses case falls out of my pocket into the water, but fortunately, it floats so I retrieve it. I would say my sunglasses case is buoyant. ✔Ans✔ positively Salt water causes more buoyancy than fresh water because it is less dense and weighs less. a. True b. False ✔Ans✔ b. False Salt water causes more buoyancy because it is more dense and weighs more; buoyancy results from the weight of the water displaced To control my buoyancy, normally I will use my weight system and my ✔Ans✔ BCD ✔Ans✔ decrease, increase Underwater, when I inhale, my buoyancy ✔Ans✔ increases slightly It is important to master buoyancy control because it affects almost everything I do in and underwater. a. True b. False ✔Ans✔ a. True In recreational diving, the buddy system means diving with another diver or divers in a team that provides assistance and safety benefits. a. True b. False ✔Ans✔ a. True Overall benefits of the buddy system include ✔Ans✔ practicality, safety and fun The three most important considerations in choosing scuba equipment are suitability, fit and ✔Ans✔ comfort Getting the service my gear needs may be a consideration when choosing equipment. a. True b. False ✔Ans✔ a. True Before each use, I should my equipment. ✔Ans✔ inspect I need a mask because ✔Ans✔ my eyes must be in air to focus My mask encloses my nose so I can ✔Ans✔ equalize the mask From among masks that fit me, I should choose a mask that fits as far away from my face as possible. a. True b. False ✔Ans✔ b. False Choose a low profile that sits as close to your face as possible I want to adjust my mask so the strap rests ✔Ans✔ above my ears, over the crown of my head Snorkels are standard equipment for scuba diving because they allow me to breathe with my face in the water, or in rough conditions, without wasting my scuba air, especially when I have little scuba air remaining. a. True b. False ✔Ans✔ a. True Some scuba divers prefer a snorkel with a flexible lower portion so it drops out of the way when not in use. a. True b. False ✔Ans✔ a. True When my snorkel is in my mouth, the tip should be ✔Ans✔ over the crown of my head Fins provide a large surface area so my legs can push against the water effectively. a. True b. False ✔Ans✔ a. True The two basic fin styles are fins. ✔Ans✔ adjustable and full-foot My primary considerations when choosing fins are fit and ✔Ans✔ blade size To prepare adjustable fins, I should adjust the straps wearing my wet suit boots. a. True b. False ✔Ans✔ a. True Submersible Pressure Gauge (SPG) ✔Ans✔ tells you the air pressure remaining in your cylinder so you can manage your air supply Alternate Air Source ✔Ans✔ an extra second stage you use for sharing air with a buddy should the need arise Pony Bottles ✔Ans✔ small cylinders with their own regulators, so they're completely separate from your main scuba kit Second Stage ✔Ans✔ reduces the first stage intermediate pressure to the pressure around you and delivers air only when you inhale - on demand First Stage ✔Ans✔ hub of your regulator that is a simple and reliable device that supplies air to all the other components Yoke ✔Ans✔ holds the first stage to the cylinder with a clamp system The most important consideration when choosing a regulator is ✔Ans✔ ease of breathing When choosing an alternate air source, a primary consideration involves deciding ✔Ans✔ between independence and simplicity My SPG is always part of my dive computer. a. True b. False ✔Ans✔ b. False Your SPG may be an independent instrument or it may be integrated into your dive computer My local dive pro will usually set up my regulator components. Scuba cylinders require pressure testing and visual inspections ✔Ans✔ a. True b. False ✔Ans✔ a. True When setting up and wearing a kit, the alternate air source ✔Ans✔ secures in the triangle formed by my hips and chin Regulators need periodic overhauls, typically every year to two years. a. True b. False ✔Ans✔ a. True The is a safety device that relives accidental overpressure by releasing air before reaching the pressure at which the cylinder would fail. ✔Ans✔ burst disk A cylinder with a higher working pressure always holds more air than a cylinder with a lower working pressure. a. True b. False ✔Ans✔ b. False A cylinder's capacity depends upon both its working pressure and its internal capacity I bring a cylinder aboard a diver boat in preparation for a trip out to a nearby reef. The normal procedure would be to ✔Ans✔ secure the cylinder in a rack every 2-5 years, annually I should have my scuba cylinder filled ✔Ans✔ only by reputable scuba air stations The most important feature in my weight system is its ✔Ans✔ quick release I must be able to quickly release enough weight to float reliably in an emergency, but not necessarily all my weight. a. True b. False ✔Ans✔ a. True Trim means having the right of weight. ✔Ans✔ distribution One reason for wearing more than one weight system is that it is sometimes easier than handling a single, heavier one. a. True b. False ✔Ans✔ a. True Accessory weights ✔Ans✔ can help you adjust your trim Underwater objects appear ✔Ans✔ larger and/or closer My buddy has a bright red shoulder patch on his wet suit. If we're diving together in very clear water on a sunny day, at 12 metres/40 feet I would expect the patch to appear ✔Ans✔ less red than at the surface Because water is denser than air, it takes more effort to move through water. a. True b. False ✔Ans✔ a. True To move efficiently as a dive, I should move ✔Ans✔ slowly and steadily Streamlining benefits me as a diver because it reduces drag, which helps me save energy. Overexertion symptoms include ✔Ans✔ fatigue, labored breathing, a feeling of suffocation or air starvation, weakness, anxiety, headache, muscle cramping, a tendency to panic BWRAF ✔Ans✔ Begin (BCD) - Check adjustment, how to operate it, low-pressure inflator connection, and that your cylinder is firmly in the band With (Weight) - Check that you have the right amount of weight, that it's properly distributed for trim, and that the quick release is clear so that you can, in a single motion, release enough weight to be sure you float Review (Releases) - Confirm everyone's releases are secure, and that all buddies know how to work each other's releases in case they need to do so in an emergency And (Air) - Test breathe your regulator two or three breaths. Check your air pressure to be sure it shows a full cylinder Friend (Final Check) - Look each other over for anything that seems to be missing, out of place, not adjusted correctly, etc. My buddy and I are planning a boat dive with the same type cylinders filled to 200 bar/3000 psi. Due to conditions, we are planning very conservatively. We agree on 60 bar/800 psi for our reserve. We agree that we also want an additional 30 bar/500 psi for our ascent and safety stop. This means we should begin our ascent when either of our SPGs reads ✔Ans✔ 90 bar/1300 psi Three common reasons why you may swim on the surface while scuba diving are ✔Ans✔ - To save air when you must enter the water some distance from where you want to descend and/or ascend. - To save air while looking for where you want to descend. - Because you may surface away from your exit point, and must swim to it on the surface. At the surface, it's a good habit to keep my mask on and my snorkel or regulator in my mouth because it helps me deal with difficulties more effectively. a. True b. False ✔Ans✔ a. True My buddies and I plan to enter the water, but swim on the surface to a descent point 50 meter/yards away. A primary reason we will do this is because ✔Ans✔ it saves our cylinder air for the dive For the 50 meter/yard swim, my buddies and I will swim because it is less tiring. ✔Ans✔ on our backs To stay with my buddy while surface swimming, generally it works well to swim ✔Ans✔ side by side Five steps you follow when you descend are ✔Ans✔ 1. Confirm that your buddies are ready 2. Orient yourselves to something at the surface or underwater, such as the boat or a landmark 3. Switch from your snorkel to your regulator 4. Check, and if necessary activate, your dive computer or timer 5. Signal "descend" and, with your buddies, slowly deflate your BCD I'm descending in open water with my buddies. After confirming they are ready, the next step is to signal "descend" and slowly deflate my BCD. a. True b. False ✔Ans✔ b. False You orient yourself, switch to your regulator and check your dive computer or timing device before deflating your BCD When descending with a reference, I would normally ✔Ans✔ use it as a visual reference only My buddy and I have just started our descent. I begin equalizing ✔Ans✔ immediately, as soon as my head goes underwater As I descend while wearing a wet suit, my buoyancy will tend to ✔Ans✔ decrease During my descent, to control my buoyancy I add air to my BCD ✔Ans✔ in small amounts, frequently Five steps you follow when you ascend are ✔Ans✔ 1. Signal "up" and confirm that your buddies are ready 2. Check your dive computer to be sure you're within its limits 3. Look up and hold up your BCD deflator hose. 4. Ascend slowly, no faster than 18 meters/60 feet per minute but 10 meters/30 feet per minute is better 5. Look up and turn as you ascend, and stay with your buddies. Watch for obstacles overhead. Reach up as you near and break through the surface A safety stop is ✔Ans✔ a simple pause in your ascent between 6 meters/20 feet and 3 meters/10 feet (commonly 5 meters/15 feet) for three to five minutes Before starting my ascent, I should check my dive computer to be sure I'm within its limits. a. True b. False ✔Ans✔ a. True To start my ascent, I should ✔Ans✔ swim up gently When I'm ascending, I should ascend ✔Ans✔ slowly - no slower than 18 meter/60 feet per minute I'm ascending from a dive during which I'm wearing a wet suit. My buoyancy will as I ascend, unless I adjust it with my BCD. ✔Ans✔ increase Popular dive environments include ✔Ans✔ coral reefs, temperate water oceans, lakes and reservoirs, rivers, springs, flooded quarries and human-made dive environments Visibility ranges from to ✔Ans✔ 0 to more than 200 feet When choosing a gear bag, I should choose one for the gear I have. ✔Ans✔ slightly larger than what I need Compass ✔Ans✔ provides a navigational reference to help you follow a course and find your way back to your exit Thermometer ✔Ans✔ help you determine how much exposure protection you need If I am using dive tables instead of a dive computer, I will need a dive timer and depth gauge. a. True b. False ✔Ans✔ a. True It's a sunny day and I'm on a boat with no shade. It would be a good idea to cover my gear, including instruments, with a towel. a. True b. False ✔Ans✔ a. True Snorkel Clearing ✔Ans✔ blow the water out forcefully, like using a pea-shooter (blast method) Six general conditions that effect you during a dive are ✔Ans✔ temperature, visibility, water movement, bottom composition, aquatic life and sunlight Silt/mud ✔Ans✔ clay, fine organic/inorganic material or mud Sand ✔Ans✔ larger, coarser particles Rock ✔Ans✔ gravel and larger rock Coral ✔Ans✔ living and dead coral in tropical water Vegetation ✔Ans✔ various plants and algae found in both fresh and salt water I can enjoy diving in many different aquatic environments that include coral reefs, flooded quarries and human-made dive environments. a. True b. False ✔Ans✔ a. True In most (but not all) environments, as I go deeper the water gets ✔Ans✔ colder Although somewhat subjective, I measure visibility as how far I can see underwater ✔Ans✔ horizontally Particles made of fine material affect visibility by ✔Ans✔ remaining suspended for long periods When diving in reduced visibility, it's a good idea to descend and ascend with a reference. a. True b. False ✔Ans✔ a. True When diving in clear water, I don't have to worry as much about staying close to my buddy. a. True b. False ✔Ans✔ b. False In clear water, you may get too far from your buddy because you can still see each other. As a rule of thumb, stay within two seconds of each other. The two types of water motion that most affect me as a diver are waves and current. a. True b. False ✔Ans✔ a. True When diving in a mild current, normally I want to begin my dive the current. ✔Ans✔ headed into If I were caught in a current and carried downstream past my planned exit, I should swim the current. ✔Ans✔ across Due to a problem, my buddy and I had to surface away from the boat. There is a current, so we swam across it to reach the line trailed from the boat, but the current pushed us too quickly. To avoid overexertion, we should ✔Ans✔ establish positive buoyancy, signal the boat to pick us up and remain calm When I'm diving, I want to avoid bottom contact because ✔Ans✔ - it helps keep the water clearer - there may be some hazard of cuts, scrapes or stings - fragile aquatic life could be damaged The most common injury divers suffer may be ✔Ans✔ sunburn b. False ✔Ans✔ a. True While underwater near a kelp forest, my buddy and I see a large shark approach. We should ✔Ans✔ remain calm, near the bottom and watch it Laws and regulations about aquatic life exist to preserve and protect organisms, and also for human safety. a. True b. False ✔Ans✔ a. True One potential hazard of some plants and kelp is ✔Ans✔ entanglement Project AWARE involves me and other divers as part of a movement to help keep our clean and full of healthy, abundant marine life. a. True b. False ✔Ans✔ a. True When wading into water while shore diving, the general procedure is to put my fins on in water about knee deep, then walk backward until I can swim. a. True b. False ✔Ans✔ b. False The general procedure is to wade until your BCD can support you - about chest deep - then put your fins on. and generally determine the best way to wade in and out or how soon I put my fins on. ✔Ans✔ bottom composition and aquatic life When shore diving, I always have long surface swim before descending and after descending. a. True b. False ✔Ans✔ b. False How far you swim before descending and/or after descending varies with the dive site Surge ✔Ans✔ Back-and-forth motion caused by waves passing overhead. The bigger the waves, the stronger the surge and the deeper it affects you. Rip currents ✔Ans✔ result when waves push water over a long obstruction (such as a reef or sandbar) Upwelling ✔Ans✔ wind blowing from shore can push surface water away, causing cooler, deeper water to rise toward the surface to replace it Tides ✔Ans✔ result from the moon and sun's gravity pulling on the water of the oceans My buddy and I are assessing conditions for a shore dive. The waves are breaking when they are about 1 meter/3 feet tall. About how deep is the water where they break? ✔Ans✔ 1 meter/ 3 feet Diving in moderate to large surf requires special training. Diving in large and rough surf can be hazardous. a. True b. False ✔Ans✔ a. True My buddy and I experience mild surge after entering the water. We may be able to adjust for this by diving ✔Ans✔ deeper While assessing conditions, my buddy and I note that there are waves approaching shore from an angle. Our dive plan should account for having ✔Ans✔ a current that moves us parallel to shore By accident, I find myself in a strong current rushing rapidly away from shore. Generally, I should inflate my BCD and swim ✔Ans✔ parallel to shore The wind has been blowing from shore for several days. During a dive, it is likely I will find water. ✔Ans✔ cooler, deeper Tides affect conditions related to diving including ✔Ans✔ currents, depth and visibility When entering through mild surf, as a wave approaches I should stand ✔Ans✔ sideways to it The Bow ✔Ans✔ The front of the boat. "Forward" means toward the bow. The Stern ✔Ans✔ The back of the boat. "Aft" means toward the stern. Port ✔Ans✔ The left side of the boat as you face forward Starboard ✔Ans✔ The right side of the boat as you face forward Leeward ✔Ans✔ The side away from the wind Windward ✔Ans✔ The side toward the wind The bridge (wheelhouse) ✔Ans✔ The portion of the boat where the controls are; often elevated for visibility. Head ✔Ans✔ The boat's toilet facilities or the boat's commode specifically. My buddy and I surface and discover that the boat is nowhere in sight. We are beyond sight of shore and there is no mooring buoy or anchored float. We should ✔Ans✔ inflate our BCDs, use our surface signaling devices and wait for pick up Four stages of dive planning are ✔Ans✔ advance planning, preparation planning, last-minute planning, and predive planning Typically, I decide on the dive buddy(ies) or diver operator (boat or resort) during ✔Ans✔ advance planning is what I do a few hours before, to right up to when I leave for the dive site. ✔Ans✔ Last-minute preparation I want to begin at least a day or two before the dive. ✔Ans✔ preparation planning During , my buddy and I settle on details and make decisions based upon what we find at the dive site. ✔Ans✔ predive planning Considerations for extended dive travel may include ✔Ans✔ what gear to take, having my logbook and certification with me, researching the destination, planning activities other than diving My buddy and I have surfaced from a dive. The water is completely calm and there is no clear need to keep my mask on. Following the approach to diving that helps prevent problems, I would ✔Ans✔ keep my mask on Under stress, I tend to do what I do by habit. a. True b. False ✔Ans✔ a. True the surface are and ✔Ans✔ checking for breathing, providing rescue Continuing my diver education can extend and refine the emergency skills I learn in the course. a. True b. False ✔Ans✔ a. True I can prevent or control most dive problems that occur at the surface by diving within my limits, relaxing while I dive and ✔Ans✔ becoming and staying buoyant If a diving related problem occurs at the surface, I should immediately switch from my snorkel to my regulator. a. True b. False ✔Ans✔ b. False you should immediately establish buoyancy by inflating your BCD and/or dropping your weights I can tell if my buddy is in control (not panicked) with a problem at the surface if my buddy ✔Ans✔ appears relatively relaxed, asks for help, follows instructions, breathes form the snorkel or regulator When assisting a responsive diver at the surface, I always begin by ✔Ans✔ establishing buoyancy for myself and the diver After establishing buoyancy for both of us, the primary concerns with an unresponsive diver at breaths if needed My buddy doesn't move while floating at the surface, so I tap my buddy's shoulder. My buddy signals "okay." I should disregard this signal and assume my buddy is unresponsive. a. True b. False ✔Ans✔ b. False A diver who responds to communication is not unresponsive When assisting an unresponsive diver at the surface, if I find the victim isn't breathing, I should ✔Ans✔ provide rescue breaths To prevent and control underwater problems, I should ✔Ans✔ relax while I dive, plan my air use, dive within my limits While diving, I begin to feel air-starved because I have been swimming hard. I should ✔Ans✔ signal "stop" and rest To breathe from a free flowing regulator, I should hold the second stage ✔Ans✔ with the mouthpiece pressed against my lips If I were to become entangled underwater, I should ✔Ans✔ stop, think and work to free myself During a dive, I find I am running low on air sooner than expected. My buddy and I are still several minutes from our planned point, but I am almost at reserve pressure. We should ✔Ans✔ ascend immediately where we are Although it shouldn't have happened, on a dive I fail to watch my SPG and run out of air. I don't have a pony bottle or self-contained ascent bottle. My buddy is close at hand - less than two seconds away, and has an alternate second stage. My best option is probably to ✔Ans✔ ascend using an alternate air source If I am bringing an unresponsive diver to the surface and the victim becomes too buoyant to control, I should stay with the victim even if our ascent is too fast. a. True b. False ✔Ans✔ b. False You should let the victim go, complete your ascent at the safe rate, and resume the rescue at the surface Typical space parts kits might have ✔Ans✔ spare mask strap, fin strap and snorkel keeper, harness/weight belt buckle, cable ties, adjustable wrench, pliers, screw driver, regulator One use of a dive light is to look into holes and cracks where shy organisms may hide during the day. a. True b. False ✔Ans✔ a. True Wide beam lights tend to be dive lights. ✔Ans✔ larger It is recommended that at a minimum, for each dive you log ✔Ans✔ date, dive site (name or location), dive buddy, dive depth and duration, objective/description Dive planning software can help me estimate and plan ✔Ans✔ my air use, computer dive time I can choose from very basic software intended only for planning recreational dives, as well as software designed for much more complex diving. a. True b. False ✔Ans✔ a. True Spare parts kit ✔Ans✔ collection of user-replaceable items in a compact, sturdy box (or other suitable container) Diving can be physically demanding, so I should be in good health and reasonably fit. a. True b. False ✔Ans✔ a. True mouthpiece, accessory clip, slate/wet book pencil, various sized cylinder valve/DIN valve o-rings Before diving, I should refrain using and ✔Ans✔ alcohol, tobacco It is recommended that I have a complete physical examination when I start diving and regularly thereafter. a. True b. False ✔Ans✔ a. True Factors that can strain my heart in diving include ✔Ans✔ swimming hard, carrying equipment, climbing a ladder, heat stress If I may be predisposed to heart disease, I should consult my doctor so I can assess and manage the risk as a diver. a. True b. False ✔Ans✔ a. True Before using prescribed or over-the-counter medication, if I am not sure how they will affect me diving, I should consult my physician. a. True b. False ✔Ans✔ a. True The best way to keep my dive knowledge and skills current and refreshed is to ✔Ans✔ use them by diving regularly As a new PADI Open Water Diver, I should refresh my dive skills with a PADI ReActivate after of inactivity ✔Ans✔ six months Continuing my diver education helps keep my skills and knowledge sharp by ✔Ans✔ allowing me to visit new dive sites, increasing my opportunities to dive, expanding the types of diving I do, introducing me to new buddies I can dive with The four issues in diving that relate to the component gases in air are ✔Ans✔ oxygen toxicity, decompression sickness, contaminated air, gas narcosis Air consists of oxygen and ✔Ans✔ nitrogen Air is percent oxygen ✔Ans✔ 21 percent If I dive within recreational limits using air, I avoid the problems associated with oxygen being toxic or causing fire/combustion issues. a. True b. False ✔Ans✔ a. True As a PADI Open Water Diver, I should not dive with a cylinder labeled "oxygen" or known to have 100 percent oxygen. a. True b. False ✔Ans✔ a. True Enriched air nitro can have oxygen issues. To avoid these, I should become qualified to dive with enriched air in the PADI Enriched Air Diver course, or be under the supervision of a PADI Enriched Air Instructor. a. True b. False ✔Ans✔ a. True Possible causes of contaminated air include ✔Ans✔ getting a cylinder filled at an improper source, improper maintenance of the filling system, very high levels of contaminant in the source gas-more than the filters can keep out While at 18 meters/60 feet, my computer says I have 40 minutes no stop time remaining. My buddy and I ascend to 10 meters/30 feet. Our computers will show our no stop time is ✔Ans✔ longer Ascending faster than the required ascent rate of my computer or table may increase my risk of DCS. a. True b. False ✔Ans✔ a. True If i were to skip stop, I would surface outside model limits and have a high risk of decompression sickness. ✔Ans✔ an emergency decompression Nitrogen left in your body after a dive is ✔Ans✔ residual nitrogen A dive made while you still have residual nitrogen is ✔Ans✔ repetitive dive Time you spend at the surface between two dives is ✔Ans✔ surface interval A repetitive dive is a dive made while I still have theoretical residual nitrogen in my body. a. True b. False ✔Ans✔ a. True On a repetitive dive, for a known depth my no stop limits will be those of the first dive ✔Ans✔ shorter than After a surface interval, the nitrogen dissolved in my body will ✔Ans✔ decline My dive computer only calculates while I am underwater. It doesn't do anything between dives. a. True b. False ✔Ans✔ b. False your dive computer continues to calculate until your theoretical nitrogen levels return to normal I must use the same dive computer the entire day of diving, on all dives, and not share it with another diver. a. True b. False ✔Ans✔ a. True Dive tables like the RDP and eRDPml use tables to calculate repetitive dives ✔Ans✔ 3 The four advantages that made dive computers far more popular are ✔Ans✔ easier to use than tables, help offset human error, give you more time underwater, have other features to record your dive Practically all dive computers provide this information before, during and/or between dives ✔Ans✔ no stop (no decompression) limits, depth, elapsed time, no stop time remaining, ascent rate, emergency decompression, previous dive information The first step in setting up my dive computer is to ✔Ans✔ read the manufacturer instructions During a dive with my dive computer, my buddy and I will turn the dive based on the first limit we reach: remaining no stop time or air supply turn point. a. True b. False ✔Ans✔ a. True given depth. We have plenty of air, so it's okay to stay longer or go deeper than we planned. The six guidelines when diving with a computer are ✔Ans✔ dive the plan, stay well within your computer's limits, follow the most conservative computer-yours or a buddy's, watch your SPG, start at your deepest point and go shallower, ascend slowly well within your computers ascent rate During a dive, my dive computer allows more dive time than my buddy and I planned for a a. True b. False ✔Ans✔ b. False don't exceed your planned depth or time just because your computer will let you During a dive, my dive computer fails and I'm not using a backup. I should ✔Ans✔ ascent, make a safety stop and end the dive Are divers a significant threat to the overall health of the underwater environment? ✔Ans✔ no One reason it is important to apply environmentally friendly dive skills is to preserve the natural beauty for other divers. a. True b. False ✔Ans✔ a. True My influence as a diver and ambassador for the underwater world allows me to be part of the solution to the problems the world's aquatic ecosystems face. a. True b. False ✔Ans✔ a. True I would find a minimum surface interval when, after a dive, I want to know how long the would be ✔Ans✔ time at the surface Signs and symptoms of gas narcosis are ✔Ans✔ feeling intoxicated, loss of coordination, slowed thinking, slowed reactions, inappropriate laughter, depression, false sense of security, ignoring or disregard for safety, anxiety and/or panic Gas narcosis is thought to be harmful itself. a. True b. False ✔Ans✔ b. False Gas narcosis is not thought to be harmful itself. Then hazard is that it impairs the good judgement, clear thinking and timely responses you need to avoid and manage problems underwater Gas narcosis is thought to be caused by the increased amount of dissolved gases in body tissues slowing nerve impulses that travel in the brain and nervous system. a. True b. False ✔Ans✔ a. True Most divers usually begin to notice gas narcosis at a depth of approximately ✔Ans✔ 30 meters/100 feet Before a dive, I feel a bit tired. This may make narcosis ✔Ans✔ noticeable at a shallower depth If I am diving and begin to feel intoxicated, I should ✔Ans✔ signal my buddy to ascend to a shallower depth The five benefits of navigating underwater are ✔Ans✔ helps you plan your dive so you don't waste air trying to find the best parts of the dive site, allows you to avoid long surface swims by navigating to your ascent/exit point underwater, helps you take the shortest route to the boat or shore if you have a problem, lets you avoid certain areas if necessary, or stay within a certain area, reduces stress because you know generally where you are at any point of the dive Four basic features of a standard underwater compass are ✔Ans✔ magnetic north needle - needle that can rotate so it always points to magnetic north lubber line - straight line through the center of the compass face or along the side from the 6 to the 12 bezel with index marks - rotates so you can align two, small parallel marks over the north needle heading reference - most compasses have numbers to record your heading Underwater navigation helps me save air and can help me get to an exit point the shortest way if I have a problem. a. True b. False ✔Ans✔ a. True The is/are always my direction of travel when navigating with a compass. ✔Ans✔ lubber line I should hold my compass so the is/are aligned with the centerline of my body. ✔Ans✔ libber line As I swim while navigating with a compass, I should keep the within the index marks. ✔Ans✔ north needle With most electronic compasses, to navigate in a straight line, I swim with the same degree heading showing. a. True b. False ✔Ans✔ a. True As a new PADI Open Water Diver, I was trained to a maximum depth of (or the actual depth I reached, if shallower). ✔Ans✔ 18 meters/60 feet A reverse block (also called a reverse squeeze) results when ✔Ans✔ expanding air becomes trapped in a body air space As I descend, I need to equalize air spaces. Two accepted ways of equalizing my ears are ✔Ans✔ block my nose and attempt to gently blow through it, swallow and wiggle the jaw from side to side