PADI OPEN WATER DIVER QUESTIONS WITH COMPLETE SOLUTIONS GRADED A+

As a newly certified PADI Open Water Diver, I will be trained to dive with a buddy as deep as ________. - 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 - a. True PADI courses are performance-based. This means that to be certified, I must ________ - 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 - 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 - a. True As you descend in water the pressure ________ - increases A depth of 10 metres/33 feet causes a pressure change of ________. - 1 bar/ata If you take 6 liters of air from the surface to 20 metres/66 feet, the volume will be ________. - 2 litres The density of the air in 6 litres from the surface to 20 metres/66 feet is ________ - three times greater A balloon fully inflated and sealed at 10 metres/33 feet, would probably ________ during ascent to the surface. - burst As I descend, increasing pressure affects my (choose all that apply): - mask, ears and sinuses A squeeze is caused by ________ - a pressure imbalance between the surround pressure and an air space Equalization is the process of ________ - adding air to an air space I should equalize ________ - before I feel pain or discomfort I'm descending and discover I can't equalize. The first thing I would do is ________ - stop my descent and signal my buddy/the instructor I equalize gently because an extended, forceful equalization can cause permanent damage to my ears and hearing. a. True b. False - a. True On a day I plan to go diving, I wake up with my sinuses blocked due to a cold or allergy. I should ________ - cancel the dive until I'm well When scuba diving, normal breathing keeps your lungs equalized to the surrounding pressure. a. True b. False - a. True The most important rule in scuba diving is to ________ - breathe continuously and never hold your breath Failure to follow the most important rule in scuba diving can cause severe lung overexpansion injuries, which can result in paralysis or death. a. True b. False - a. True During ascent I feel discomfort in my ears. I should ________ - stop, descend slightly and allow trapped air to work its way out My buddy and I descend to 12 metres/40 feet. I would expect to use my air ________ at 6 metres/20 feet. - faster than The most efficient way to breathe dense air underwater is to breathe ________ - deeply and slowly My body responds to anxiety with increased breathing, but slow breathing helps reduce anxiety. a. True b. False - a. True What are the breathing rules I must follow as a diver? - - Breathe continuously and never, ever, hold my breath - 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 - 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. - positively Salt water causes more buoyancy than fresh water because it is less dense and weighs less. a. True b. False - 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 ________ - BCD When I descend, my buoyancy tends to ________. When I ascend, it tends to ________. - decrease, increase Underwater, when I inhale, my buoyancy ________ - increases slightly It is important to master buoyancy control because it affects almost everything I do in and underwater. a. True b. False - 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 - a. True Overall benefits of the buddy system include ________ - practicality, safety and fun The three most important considerations in choosing scuba equipment are suitability, fit and ________ - comfort Getting the service my gear needs may be a consideration when choosing equipment. a. True b. False - a. True Before each use, I should ________ my equipment. - inspect I need a mask because ________ - my eyes must be in air to focus My mask encloses my nose so I can ________ - 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 - 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 ________ - 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 - 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 - a. True When my snorkel is in my mouth, the tip should be ________ - 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 - a. True The two basic fin styles are ________ fins. - adjustable and full-foot My primary considerations when choosing fins are fit and ________ - blade size To prepare adjustable fins, I should adjust the straps wearing my wet suit boots. a. True b. False - a. True BCD (Buoyancy Control Device) - Holds your kit together and allows you to adjust buoyancy throughout the dive. Regulator - Delivers breathing air at the surrounding pressure when you inhale and directs exhaled air into the water Cylinder - Hold the high-pressure breathing air supplied by your regulator during the dive. Weight System - Holds lead weight to counteract the positive buoyancy of your body and some of your equipment, with a mechanism for dropping some or all the weight in an emergency. Identify the four systems that make up a scuba kit. - Cylinder, BCD, Regulator, Weight System There's no real benefit to choosing the components of my scuba kit as an integrated package. a. True b. False - b. False Although the components are generally interchangeable, choosing your scuba kit as a package helps you best meet your preferences Inflatable Bladder - very durable bag that you inflate or deflate to change your buoyancy Cylinder band and harness/jacket - The bladder integrates with an adjustable harness that holds the cylinder on your back. The bladder may be entirely behind you, or wrap partially around your waist and/or over your shoulders. With some systems, you can interchange harnesses and bladders to accommodate sizing and preferences. LPI (low-pressure inflator) mechanism - Usually at the end of a large-diameter hose, the LPI inflates the bladder with air from your cylinder, via the regulator, when you press a button. Another button allows you to deflate the bladder, or inflate it orally. Overpressure/quick exhaust valves - to prevent rupturing the bladder due to overfilling, BCDs have one or more overpressure valves that automatically vent if the BCD is too full. Some may have "quick dump" valves that let you manually release air, which is sometimes easier (due to your position in the water) that using the LPI exhaust. Shoulder quick release - a quick-release buckle on one or both shoulders makes it easier to get out of your kit Buoyancy Capacity - Most BCDs cover a wide range of diving circumstances. Your BCD should have ample buoyancy to easily float you and all your equipment at the surface. You sometimes hear the amount of buoyancy called "lift" capacity. The LPI mechanism inflates the BCD with air from my scuba cylinder. a. True b. False - a. True My BCD should have adequate capacity to easily float my equipment and me at the surface. a. True b. False - a. True My BCD should fit ________ - snugly but not restrict breathing when fully inflated My buddy is rinsing a BCD and partially fills the bladder with water. Is this consistent with recommended BCD care? - yes Submersible Pressure Gauge (SPG) - tells you the air pressure remaining in your cylinder so you can manage your air supply Alternate Air Source - an extra second stage you use for sharing air with a buddy should the need arise Pony Bottles - small cylinders with their own regulators, so they're completely separate from your main scuba kit Second Stage - reduces the first stage intermediate pressure to the pressure around you and delivers air only when you inhale - on demand First Stage - hub of your regulator that is a simple and reliable device that supplies air to all the other components Yoke - holds the first stage to the cylinder with a clamp system The most important consideration when choosing a regulator is ________ - ease of breathing When choosing an alternate air source, a primary consideration involves deciding ________ - between independence and simplicity My SPG is always part of my dive computer. a. True b. False - 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. a. True b. False - a. True When setting up and wearing a kit, the alternate air source ________ - secures in the triangle formed by my hips and chin Regulators need periodic overhauls, typically every year to two years. a. True b. False - a. True The ________ is a safety device that relives accidental overpressure by releasing air before reaching the pressure at which the cylinder would fail. - 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 - 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 ________ - secure the cylinder in a rack Scuba cylinders require pressure testing ________ and visual inspections ________ - every 2-5 years, annually I should have my scuba cylinder filled ________ - only by reputable scuba air stations The most important feature in my weight system is its ________ - 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 - a. True Trim means having the right ________ of weight. - 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 - a. True Accessory weights ________ - can help you adjust your trim Underwater objects appear ________ - 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 ________ - less red than at the surface Because water is denser than air, it takes more effort to move through water. a. True b. False - a. True To move efficiently as a dive, I should move ________ - slowly and steadily Streamlining benefits me as a diver because it reduces drag, which helps me save energy. a. True b. False - a. True Trim is important for streamlining because ________ - poor trim raises or lowers my feet, causing drag Water's density works best for me when I use the skill of ________ - controlling my buoyancy I chill faster in water than in air of the same temperature because water absorbs more heat than air does. a. True b. False - a. True To stay comfortably warm during a dive, I ________ - wear an appropriate exposure suit After 30 minutes underwater, I start to feel a bit too cool and uncomfortable. I should ________ - end the dive While diving, I start to feel cool and shorty being to shiver uncontrollably. I should ________ - end the dive immediately, dry off and seek warmth While scuba diving, I should breathe ________ - slowly and deeply One method of airway control is to inhale slowly. I can also ________ to help breathe past small amounts of water in my regulator. - raise my tongue If I'm tired, have labored breathing and feel air-starved and anxious during a dive, it is likely I am experiencing overexertion. a. True b. False - a. True Overexertion results from ________ - a prolonged increased effort If I think I'm overexerting while underwater, I should stop, signal my buddy and ________ - rest My buddies and I are planning a dive. Among other things, we should address how to enter and exit the water, the maximum depth and time, when to turn the dive and what to do if we get separated. a. True b. False - a. True As my buddy and I kit up, the normal practice is to be entirely independent. Helping each other is discouraged. a. True b. False - b. False Buddies normally help each other. How much you assist each other depends on the situation. When I conduct a predate safety check, the "A" in the recall phase includes ________ - confirming adequate air pressure for the dive If my buddy and I get separated, the general procedure is to ________ - look for each other for no more than a minute, then reunite on the surface The buddy system is ________ responsibility. - my Overexertion symptoms include ________ - fatigue, labored breathing, a feeling of suffocation or air starvation, weakness, anxiety, headache, muscle cramping, a tendency to panic