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PADI Open Water Diver Course - Section 1: 2025 Questions and Verified Solutions, Exams of Physical Activity and Sport Sciences

Divers Academy InternationalPhysical Activity and Sport Sciences

A comprehensive set of questions and answers covering the first section of the padi open water diver course. It covers essential topics such as diving safety, equipment, buoyancy, and the buddy system. Designed to help students prepare for the course and understand the fundamental principles of scuba diving.

Typology: Exams

2024/2025

Available from 02/28/2025

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PADI OPEN WATER DIVER COURSE -
SECTION 1 2025 QUESTIONS AND VERIFIED
SOLUTIONS| ABSOLUTE SUCCESS
GUARANTEED.
1. Training is important because? - correct answer - It enables diving to be
rewarding and meaningful, there are potential hazards to avoid, reduce
and/or manage and diving has risks.
2. Certification shows? - correct answer - Certification shows that you met
the course requirements.
3. You will be trained to what depth? - correct answer - A maximum of 18
metres/60 feet.
4. What conditions are you qualified to dive in? - correct answer -
Conditions as good as, or better than, those in which you trained.
5. The three parts of the course are? - correct answer - Knowledge
development, confined water dives and open water dives.
Knowledge development covers the principles, concepts and terms
needed for safety.
Confined water dives allow practise of scuba skills in a pool under direct
instructor supervision through one or more mini dives.
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Download PADI Open Water Diver Course - Section 1: 2025 Questions and Verified Solutions and more Exams Physical Activity and Sport Sciences in PDF only on Docsity!

PADI OPEN WATER DIVER COURSE -

SECTION 1 2025 QUESTIONS AND VERIFIED

SOLUTIONS| ABSOLUTE SUCCESS

GUARANTEED.

  1. Training is important because? - correct answer - It enables diving to be rewarding and meaningful, there are potential hazards to avoid, reduce and/or manage and diving has risks.
  2. Certification shows? - correct answer - Certification shows that you met the course requirements.
  3. You will be trained to what depth? - correct answer - A maximum of 18 metres/60 feet.
  4. What conditions are you qualified to dive in? - correct answer - Conditions as good as, or better than, those in which you trained.
  5. The three parts of the course are? - correct answer - Knowledge development, confined water dives and open water dives. Knowledge development covers the principles, concepts and terms needed for safety. Confined water dives allow practise of scuba skills in a pool under direct instructor supervision through one or more mini dives.

Open water dives allow practise, application and demonstration of what you have learnt.

  1. Completing the course allows you to? - correct answer - Dive without instructor supervision, obtain air fills, scuba equipment and other dive services, plan, conduct and log open water dives and continue your diver training.
  2. What is the PADI four E philosophy? - correct answer - Equipment, education, experience and environment.
  3. Scuba requirements? - correct answer - Age - you must be at least 10. 10 - 14 earn the PADI junior diver certification. 10-11 must dive with a PADI professional and 12-14 must dive with a certified adult diver.
  4. What is Performance-Based learning? - correct answer - Performance- based learning means you progress and attain certification by demonstrating that you meet specific learning objectives.
  5. What is Student-Centered learning? - correct answer - Student- cantered learning means that the course, materials and instructor address how you learn most effectively.
  1. How do air volume and density change with pressure? - correct answer - Air volume and density change proportionately with pressure. As you go from the surface to 10 metres/33 feet, the pressure doubles to 2 bar/ata. The air density is x2. From 10 metres/33 feet to 20 metres/ feet, the pressure is 3 bar/ata (1 air plus 2 water). The air density is x3.
  2. What are the three major body air spaces effected during descent? - correct answer - Ears, sinuses and mask.
  3. What is a squeeze? - correct answer - A squeeze causes discomfort and, if not corrected, can cause injury by pressure imbalance that pushes tissue into an air space as there is greater pressure outside the air space than within.
  4. What is equalization? - correct answer - Equalization keeps the pressure equal with the outside pressure so that they stay at their normal volume. This is done by adding air to air spaces during descent.
  5. How do you equalize your ears and sinuses? - correct answer - Pinch your nose and blow gently, which sends air from your throat into your ears and sinuses. You can also wiggle your jaw and swallow.
  6. How do you equalize your mask? - correct answer - Blow air into it through your nose as you descend.
  1. How often should you equalize? - correct answer - Equalize every few metres/feet, before you feel discomfort.
  2. What should you do if you can equalize during your descent? - correct answer - Stop your descent immediately and signal your buddies/instructor. Ascend slightly until the discomfort passes and try again, descending slower.
  3. Why should you equalize gently? - correct answer - Short, frequent equalizations prevent serious permanent injuries.
  4. Why shouldn't you dive with a cold/allergy? - correct answer - They can cause congestion that might block normal air flow and make equalisation difficult or impossible. Medications may also wear off during the dive.
  5. What is the most important rule in scuba diving? - correct answer - Breathe continuously and never hold your breath.
  6. What can happen if you don't follow the most important rule in scuba diving? - correct answer - Lung overexpansion can occur which can cause paralysis and death by forcing air into the bloodstream and chest cavities.
  1. The four breathing rules are? - correct answer - Breathe continuously and never hold your breath.
  2. Breath slowly and deeply.
  3. Don't allow yourself to get winded or out of breath.
  4. If faced with a problem, stop and restore your breathing.
  5. What is buoyancy? - correct answer - Buoyancy cancels the pull of gravity, allowing you to "fly" and feel weightless. It is an upward force acting on an object in water which is caused by the water displaced by the object.
  6. What is positive buoyancy? - correct answer - When an object weighs less than the water it displaces and so floats.
  7. What is negative buoyancy? - correct answer - When an object weighs more than the water it displaces and so sinks.
  8. What is neutral buoyancy? - correct answer - When an object weight the same as the water it displaces and so neither floats or sinks.
  9. Does salt water weigh more than fresh water? - correct answer - Salt water has dissolved minerals and so weighs more than fresh water, causing more buoyancy.
  1. Which two pieces of equipment control buoyancy? - correct answer - The weight system and BCD (buoyancy control device).
  2. How does a weight system control buoyancy? How much weight is needed? - correct answer - The weight system holds just enough weight to offset positive buoyancy, where just enough weight is used to descend how not too rapidly. How much weight is needed depends on the the gear, physical characteristics and whether you are diving in fresh or salt water.
  3. How does a BCD control buoyancy. - correct answer - A BCD is used to actually change your buoyancy during diving by inflating or deflating it to increase or decrease your volume, and so how much water you displace.
  4. Why do you use your buoyancy frequently? - correct answer - Some pieces of scuba equipment have gas spaces that compress as the pressure increases and expand as the pressure decreases. As their volume decreases during descent, your buoyancy is reduced to make you more negatively buoyant and so you must add air to your BCD. As their volume increases during ascent, your buoyancy is increased to make you more positively buoyant and so you must vent the air added on the way down.
  5. Buoyancy control allows you to? - correct answer - Descend and ascend at slow and controlled rates.
  1. The secondary considerations when choosing scuba equipment are?
    • correct answer - Cost and features - price and higher end models.
  2. Serviceability - some equipment requires more frequent servicing.
  3. Colour and style
  4. Accessories
  5. The general specific care requirements of all scuba equipment are? - correct answer - Inspecting your equipment for proper operation, wear and damage before use.
  6. Rinsing everything in clean, fresh water after use, before allowing it to dry in the sun.
  7. Storing in a cool, dry place.
  8. Periodic professional testing and inspection.
  9. Why do you need a dive mask? - correct answer - To see clearly underwater as your eyes must be in air to focus properly.
  10. How do you check a mask for proper fit? - correct answer - Placing a mask gently against your face and inhaling slightly through your nose, the mask should stay in place with slight suction.
  11. What are the desirable features of a dive mask? - correct answer - Low profile - a mask that sits as close to your face as possible for a wider field of view and requires less air for equalising.
  12. Wide vision field - some masks have special shapes.
  13. Silicone colour - the clear silicone rubber can give an open feel.
  14. Frame colour - the coloured frame can match the rest of your kit.
  1. How do you prepare your mask? - correct answer - Scrubbing the interior with a mask cleaner to remove protective chemicals that increase the tendency to fog.
  2. Adjust the strap so that it fits over the crown of your head and above your ears.
  3. Why do you need a snorkel? - correct answer - At the surface, a snorkel saves your air supply and makes it easier to breathe in splashing waves. It also helps when you have little air and have a moderately long swim to the boat or have to wait in water while other divers exit.
  4. What fit should a snorkel have? - correct answer - Fitting comfortably in your mouth with the top being at the crown of your head. The snorkel usually goes on the left side as your regulator is on the right.
  5. Optional features of a snorkel are? - correct answer - Flexible lower portion - allows the snorkel mouth piece to drop out when not in use.
  6. Self drain valve - makes it easier to blow water out of the snorkel.
  7. Splash guard - reduced the amount of water that can splash into the snorkel.
  8. Colour - either to match your other gear or be brightly coloured so you can easily find it.
  1. How do you prepare your fins? - correct answer - Adjust the strap on adjustable fins, and full foot fins require little to no preparation.
  2. What four equipment systems make up the scuba kit? - correct answer - Buoyancy control device (BCD) - allows you to adjust buoyancy.
  3. Regulator - delivers breathing air at the surrounding pressure.
  4. Cylinder - holds the high pressure breathing air.
  5. Weight system - holds lead weight to counteract the positive buoyancy of your body and some equipment.
  6. What should you choose your scuba kit based on? - correct answer - Size, preferences and the types of dive adventures that appeal to you.
  7. What are the 5 components of the BCD? - correct answer - Inflatable bladder - a durable bag that you inflate/deflate to change buoyancy.
  8. Cylinder band and harness - the inflatable bladder integrates with the adjustable harness that holds the cylinder on your back.
  9. LPI (low-pressure inflator) mechanism - the LPI inflates the bladder with air from your cylinder, via your regulator, when you press a bladder.
  10. Overpressure/quick exhaust valves - prevent rupturing the bladder due to overfilling by automatically venting the BCD if it is too full.
  11. Weight system - special weight pockets that can be released in an emergency.
  1. The four options when choosing a BCD are? - correct answer - Buoyancy capacity - should have ample buoyancy to easily float you and your equipment at the surface.
  2. Pockets and D-rings - pockets for storing and D-rings for attaching accessories.
  3. Shoulder quick release - a quick release buckle to quickly get out of your kit.
  4. Colours and style.
  5. How do you prepare your BCD? - correct answer - Adjust it to fit snugly but not too tightly and fully inflate to be sure it doesn't restrict breathing (while wearing). Attach a whistle near the low pressure inflator for easy access. Rinse inside the bladder inside and outside with 1/ fresh water and drain the water through the LPI exhaust. Store your BCD partially inflates to prevent the bladder from sticking together inside.
  6. What is the first and second stage of the regulator? - correct answer - The first stage is he "hub" of your regulator and is a simple and reliable device that supplies air to all components. It connects to the cylinder clamp by screwing or a yoke clamp system to form an air-tight o-ring seal. The first stage reduces the cylinder pressure to an intermediate pressure.
  7. The second stage is where you breath from and it reduces the first stage intermediate pressure to the pressure around you, delivering air only when you inhale. It has a one way valve and a purge button to manually release air from your cylinder.
  1. What other considerations do you have when choosing a regulator? - correct answer - Yoke or DIN - the yoke system holds the first stage to the cylinder with a clamp system. The DIN system involves the regulator having threads into the valve. A common choice is to choose a DIN regulator with a yoke adapter.
  2. Adjustable second stage - a small knob allows small air flow adjustments.
  3. Dive/predive switch - reduces free flow when the second stage isn't in your mouth.
  4. Cold-water first stage - the first stage can freeze which results in free flow and so this reduces the likelihood of that with a special liquid.
  5. What is your primary consideration when choosing alternate air source options? - correct answer - Deciding between the simplicity and independence. The extra second stage and alternate inflator regulator are the simplest alternate air sources regarding setup and care as they're part of your regulator and/or BCD and so add the least bulk.
  6. What considerations are there when choosing an SPG? - correct answer - Considerations are driven partly by your dive computer. If the dive computer isn't integrated, you will probably choose a standard mechanical SPG which may be independent or combine with instruments in a console. This secures to the left side of the BCD at the hip/torso area.
  7. If your SPG is part of an air-integrated computer, it secures similarly. If it is a hoseless computer, is will be on your wrist and receive air supply information wireless from a transmitter in the first stage.
  1. How do you prepare a regulator? - correct answer - Have a professional attach all the components to the appropriate ports. Your primary second stage (what you breathe from) comes over your right shoulder and is not secured. Your alternate air source attached with a quick release triangle and cannot dangle as it may fill with mud or sand or damage aquatic organisms. An SPG with a hose routed under your left arm and secured with a clip/hose retainer, don't let this dangle.
  2. What are the three considerations when taking care of your regulator? - correct answer - When rinsing it, use a gentle fresh water flow with the first stage dust cap in place.
  3. Don't allow water to enter the air inlet where it meets the cylinder valve.
  4. Run water through the second stages while rinsing but don't press the purge button.
  5. Have it periodically checked.
  6. What is a scuba cylinder? - correct answer - An aluminium or steel alloy container made for storing high pressure air.
  7. What are the two components of the cylinder? - correct answer - The cylinder itself and the valve.
  8. What does the valve do in the cylinder? - correct answer - The valve controls air flow to and from the cylinder.
  1. What does an enriched air nitrox (EANx) or nitrox band in a cylinder mean? - correct answer - That the cylinder of filled with enriched air nitrox. This is air with additional oxygen added to it.
  2. What are the handling precautions of cylinders? - correct answer - Don't leave a cylinder standing unattended.
  3. Secure cylinders for transportation.
  4. Keep cylinders secured on boats.
  5. What are the six maintenance requirements of cylinders? - correct answer - Have your cylinder pressure tested at required intervals (hydrostatic tests every 2 to 5 years)
  6. Have it visually inspected annually.
  7. Close and open the valve gently.
  8. Never completely empty it to prevent moisture entering the cylinder.
  9. Store the cylinder in a standing position.
  10. Keep the cylinder out of high heat.
  11. Where should you get your scuba cylinder filled? - correct answer - At a reputable scuba air station, and it must be filled with only air.
  12. What is the most important feature of weight systems? - correct answer - A quick release that enables you to drop enough weight to float in an emergency.
  1. Why do most BCD systems have two quick release weight systems?
- correct answer - So that you can drop your weight in two amounts.
  1. What are the two aspects of proper weighting? - correct answer - The first aspect is to have the right amount of weight, just enough to offset your positive buoyancy.
  2. The second aspect is to have the right distribution of weight, which is called trim.
  3. What is trim? - correct answer - Trim is your orientation and balance in the water. The desired trim position is a natural horizontal swimming position with your feet parallel to the bottom or slightly elevated.
  4. Why is trim important? - correct answer - To help you maintain the optimum body position in the water, save energy and reduce accidental damage to aquatic organisms.
  5. How do some divers help their trim? - correct answer - Wear more than one weight system to help distribute weight.
  6. What do weight system options depend upon? - correct answer - Your preferences, weight required and trim requirements.