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PADI Open Water Diver Certification: 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 related to the padi open water diver certification. It covers essential topics such as scuba diving basics, buoyancy control, equipment knowledge, and safety procedures. Designed to help individuals prepare for the padi open water diver exam and gain a deeper understanding of scuba diving principles.

Typology: Exams

2024/2025

Available from 02/28/2025

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PADI OPEN WATER DIVER CERTIFICATION
2025 QUESTIONS AND VERIFIED SOLUTIONS|
ABSOLUTE SUCCESS GUARANTEED.
1. SCUBA - correct answer - Self contained underwater breathing
apparatus
2. What is the pressure change for each 10m/33ft of depth change? -
correct answer - 1 bar/1 ata/1 atmosphere
3. What is the relationship between my depth in water and the pressure? -
correct answer - The deeper you go in water, the more the pressure
increases
Pressure is expressed as the weight of air
4. What is the relationship between pressure, and the volume and the
density of air? - correct answer - As pressure increases, the gas volume
decreases and the gas density increases
5. If I take a volume of air from one depth to another depth, how much will
the volume and density change? - correct answer - Volume will be
1/ata#
Density will be ata#
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Partial preview of the text

Download PADI Open Water Diver Certification: 2025 Questions and Verified Solutions and more Exams Physical Activity and Sport Sciences in PDF only on Docsity!

PADI OPEN WATER DIVER CERTIFICATION

2025 QUESTIONS AND VERIFIED SOLUTIONS|

ABSOLUTE SUCCESS GUARANTEED.

  1. SCUBA - correct answer - Self contained underwater breathing apparatus
  2. What is the pressure change for each 10m/33ft of depth change? - correct answer - 1 bar/1 ata/1 atmosphere
  3. What is the relationship between my depth in water and the pressure? - correct answer - The deeper you go in water, the more the pressure increases Pressure is expressed as the weight of air
  4. What is the relationship between pressure, and the volume and the density of air? - correct answer - As pressure increases, the gas volume decreases and the gas density increases
  5. If I take a volume of air from one depth to another depth, how much will the volume and density change? - correct answer - Volume will be 1/ata# Density will be ata#
  1. What 3 major body air spaces does increasing pressure affect as I descend? - correct answer - Ears, sinuses, mask
  2. What is a "squeeze"? - correct answer - The discomfort caused by pressure imbalance pulling tissue into the air space
  3. What is "equalization"? - correct answer - The addition of air to your air spaces as you descend
  4. How do I equalize as I descend? - correct answer - For ears and sinuses, pinch your nose and blow gently, or wiggle your jaw and swallow For mask, blow into it with nose
  5. How often should I equalize? - correct answer - Every meter/few feet, BEFORE you feel discomfort
  6. What should I do if I can't equalize? - correct answer - Stop your descent, signal problem and point to your ear, ascend a bit, and try again
  1. What is a "reverse block"? - correct answer - When expanding air becomes trapped in your body air spaces as you ascend
  2. What should I do if I feel discomfort in my ears, sinuses, stomach, intestines, or teeth while ascending? - correct answer - Stop your ascent and descend a meter/few feet to reduce discomfort and give trapped air time to work its way out
  3. How does depth affect how long my air supply lasts? - correct answer
    • The deeper you are, the more dense air you breathe, and the faster you use the air in your cylinder. Compared to the surface, air supply lasts 1/#ata as long along with other factors
  4. What's the most efficient way to breathe dense air underwater? - correct answer - Take slow, deep breaths
  5. How do I breathe to reduce anxiety when under stress? - correct answer - Do NOT breathe faster - keep breathing slowly
  6. What are my 4 breathing rules as a scuba diver? - correct answer - 1. Breathe continuously and never hold your breath
    1. Breathe slowly and deeply
    2. Don't allow yourself to get winded or out of breath
  1. If faced with a problem, stop, and reduce anxiety by breathing slowly and deeply
  2. What is buoyancy? - correct answer - An upward force acting on an object in the water, canceling the pull of gravity
  3. What causes buoyancy? - correct answer - The upwards force is caused by the water displaced by the object, and is equal to the weight of displaced water
  4. positive buoyancy - correct answer - The object weighs less than the water it displaces, so it floats
  5. neutral buoyancy - correct answer - The object weighs the same as the water it displaces, neither sinking nor floating
  6. negative buoyancy - correct answer - The object weighs more than the water it displaces, so it sinks
  7. Why does salt water cause more buoyancy than fresh water? - correct answer - It has dissolved minerals in it, so a given volume weighs more than fresh water
  1. How do I generally care for scuba equipment? - correct answer - Rinse everything in fresh water and dry it in the shade and store in a cool, dry place
  2. Why do I need a mask? - correct answer - It provides an air space so your eyes can focus because light behaves differently underwater
  3. Why does my mask need to enclose my nose? - correct answer - Because the mask creates an air space, you need your nose to blow in it to equalize it
  4. Why do I need a snorkel? - correct answer - It saves your air supply while your face is in the water
  5. What are 2 basic fin styles? - correct answer - Full-foot and adjustable strap
  6. What consists of your scuba kit? - correct answer - Buoyancy control device, regulator, air cylinder, weight system
  7. What 5 components make up a BCD? - correct answer - Inflatable bladder, harness/jacket and cylinder band, low pressure inflator (LPI) mechanism, overpressure/quick dump exhaust valve, weight system
  1. inflatable bladder - correct answer - Controls buoyancy
  2. harness/jacket and cylinder band - correct answer - Holds cylinder on back
  3. low pressure inflator (LPI) mechanism - correct answer - Inflates bladder with air from your cylinder with the touch of a button
  4. overpressure/quick dump exhaust valve - correct answer - Vents air if the bladder is overfilled
  5. weight system - correct answer - Contain weight pockets that you release and drop in case of emergency
  6. What 2 special maintenance considerations do BCDs have? - correct answer - Rinse the inside of the bladder with fresh water, and store them partially inflated to keep the bladder from sticking together
  1. What is the most important consideration in choosing a regulator? - correct answer - The ease of breathing
  2. yoke system - correct answer - Holds first stage to cylinder with a clamp
  3. DIN system - correct answer - Regulator screws into valve
  4. What 3 special maintenance considerations do regulators have? - correct answer - Rinse first stage individually, run water through second stage, have professional overhaul it about every year
  5. What 2 components make up a scuba cylinder? - correct answer - The aluminum/steel container and the valve to control air flow
  6. What is a burst disk? - correct answer - A safety device that relieves overpressure by rupturing and releasing air
  7. What is the most important feature in my weight system? - correct answer - A quick release that will enable you to float with an uninflated BC
  1. Why use more than 1 weight system? - correct answer - It will help distribute weight
  2. trim - correct answer - The orientation and balance of a swimmer in the water - the ideal is horizontal
  3. danger/hazard - correct answer -
  4. okay - correct answer -
  5. go up/end dive - correct answer -
  6. something's wrong - correct answer -
  7. down/descend - correct answer -
  8. low on air - correct answer -
  1. What are 2 techniques for airway control? - correct answer - Inhaling slowly, looking down, and touching your tongue to the roof of your mouth as you inhale
  2. What are 8 symptoms of overexertion while diving? - correct answer - Fatigue, labored breathing, a feeling of suffocation, weakness, anxiety, headaches, muscle cramping, and a tendency to panic
  3. What should I do if I think I'm becoming overexerted at the surface and underwater? - correct answer - Stop all activity, signal your buddy, and rest
  4. What points should a dive plan normally include? - correct answer - Agree on best entry/exit techniques, decide what course you'll follow, agree on maximum time and depth, review underwater signs, determine when you will head back, agree on how you'll stay together during the dive, establish what you'll do if you become separated, discuss emergency procedures
  5. How do we conduct the predive safety check? - correct answer - Using Begin With Review And Friend (BWRAF)
  1. BWRAF - correct answer - BCD, weight, releases, air, final check
  2. What do I do if I get separated from my buddy on a dive? - correct answer - Look for each other for no more than 1 minute, and then ascend to the surface if you can't find them
  3. How do my buddy and I manage our air supply together while diving?
    • correct answer - Plan your dive around who breathes air the fastest.
  4. Subtract your reserve/ascent supply from your starting pressure to find out how much pressure you have for the main part of the dive
  5. To be safe, plan to use half your air coming down, and half coming back
  6. What are the 5 steps for a proper descent with scuba? - correct answer - 1. Confirm that your buddy is ready
    1. Orient yourself to something
    1. Switch from your snorkel to your regulator
    1. Check your dive computer/timer
    1. Signal "descend" and slowly deflate your BCD
  11. What are the 5 steps for a proper ascent with scuba? - correct answer - 1. Signal "up" and confirm that your buddy is ready
    1. Check your dive computer/timer to be sure you're within dive limits
    1. Look up and hold your BCD deflator hose
    1. Ascend no slower than your dive computer's maximum rate
    1. Look up, turn as you ascend, and stay with your buddy
  1. When diving in a mild current, in what direction would I normally go? - correct answer - Swim slowly into the current so that when you turn the dive, the current will push you back to your exit point
  2. What do I do if I'm caught in a current and am carried downstream from where I planned to dive or exit the water? - correct answer - Swim perpendicular to the current
  3. What two things in the water affect a diver? - correct answer - The waves and current
  4. What is assessing conditions based on? - correct answer - The weather, season, water motion, water appearance, reports online and from other divers, and dives made at similar sites
  5. What should I do if I see a potentially aggressive animal underwater?
- correct answer - Remain still and calm. Swim away if you become uncomfortable
  1. In what depth water do waves break? - correct answer - In the surf zone, in water only slightly deeper than their height
  1. surge - correct answer - A back-and-forth motion caused by waves passing overhead
  2. undertow - correct answer - The water of waves flowing back to sea under incoming waves
  3. rip current - correct answer - When waves push water over a long obstruction and the water underneath funnels back to sea through an available opening
  4. What should I do if I get caught in a rip current? - correct answer - Establish buoyancy and swim at a sustainable pace parallel to the shore
  5. upwelling - correct answer - Usually caused by wind blowing from shore, pushing surface water away, resulting in cooler, deeper water rising towards the surface to replace it
  6. What 3 environmental conditions does tide generally affect? - correct answer - The current, depth, and visibility
  7. bow - correct answer - The front of the boat
  1. swim step - correct answer - A platform on the stern that is close to water level
  2. What are characteristics of a responsive diver? - correct answer - They are breathing, alert, and active
  3. What are the 4 basic steps for assisting a responsive diver at the surface? - correct answer - 1. Help reestablish breathing control
    1. Have the diver take slow, deep, breaths
    1. Give the diver a chance to rest and recover
    1. Assist the diver to the boat or shore
  7. What are the 4 basic steps for assisting an unresponsive diver at the surface? - correct answer - 1. Establish buoyancy for the victim and yourself
    1. Call for help
    1. Check for breathing and begin rescue breaths as you tow the diver
    1. Continue rescue breathing and get the victim out of water
  11. How should I breathe from a freeflowing regulator? - correct answer - DON'T seal your mouth on the mouthpiece. Hold the second stage and press the mouthpiece outside your lips, or insert one end of the mouthpiece into your mouth and "sip" breaths. Begin ascent immediately
  1. In order of priority, what are my four options if I run out of air underwater? - correct answer - 1. Take lighter breaths and don't attempt a safety stop as you ascend
    1. Use an alternate air source from your buddy
    1. Make a controlled emergency swimming ascent (CESA)
    1. Make a buoyant emergency ascent
  5. How do I make a controlled emergency swimming ascent (CESA)? - correct answer - When you have no air and are approximately 6-9 m/20- 30 ft from the surface, look up and swim to the surface making a continuous ahhhhh sound into your regulator
  6. How do I make a buoyant emergency ascent? - correct answer - When you have no air and are very deep, ditch your weights, look up and swim to the surface making a continuous ahhhhh sound into your regulator
  7. How should I assist an unresponsive diver underwater and what is the priority? - correct answer - You want to get the diver to the surface. Hold the diver's regulator in their mouth and try to ascend at a safe rate
  8. At a minimum, how many surface signaling devices should I have with me on a dive? - correct answer - At least 2 - one audible and one visual