Scuba Diving Final Exam Questions and Answers (Latest Update 2025) Verified Answers, Exams of Nursing

Download Scuba Diving Final Exam Questions and Answers (Latest Update 2025) Verified Answers and more Exams Nursing in PDF only on Docsity!

Answers (Latest Update 2025) Verified

Answers

What will the buoyancy of an object be (positive, neutral, or negative) if it displaces an amount of water: a. more than its own weight? b. less than its own weight? c. equal to its own weight? - Correct Answers ✅a. positive b. negative c. neutral How does the buoyancy of an object differ in fresh water compared to salt water. - Correct Answers ✅Because salt water weighs more than fresh water, it causes more buoyancy (more upward force) What is the relationship between increasing and decreasing depth and water pressure? - Correct Answers ✅With increasing depth the water pressure increases. With decreasing depth the water pressure decreases. What are the absolute pressures, air volume, and air density in atmospheres, for: a. 10m/33ft b. 20m/66ft b. 30m/99ft c. 40m/132ft - Correct Answers ✅a. 2 bar/ata, 1/2, x 2

Answers (Latest Update 2025) Verified

Answers

b. 3 bar/ata, 1/3, x 3 c. 4 bar/ata, 1/4, x d. 5 bar/ata, 1/5, x What is the relationship between air volume and density, and how do they vary according to this relationship when pressure increases or decreases? - Correct Answers ✅Air volume and density change proportionately with pressure. As pressure increases, air volume decreases, and air density increases. As pressure decreases, air volume increases, and air density decreases. What is a "squeeze"? - Correct Answers ✅A pressure imbalance that pushes tissues into an air space. What is "equalization"? - Correct Answers ✅The process of adding air to an air space. What are the three ways you can equalize air spaces during descent? - Correct Answers ✅1. pinch your nose and blow gently against it

2. wiggling your jaw side-to-side and swallowing
3. blow air into mask through your nose

Answers (Latest Update 2025) Verified

Answers

How often should you equalize during descent? - Correct Answers ✅Frequently What three steps should you take if you feel discomfort in an air space while descending? - Correct Answers ✅1. stop your descent

2. signal your buddy(ies)
3. ascend slightly until the discomfort passes and try again What is the most important rule in scuba diving? - Correct Answers ✅to breathe continuously and never, ever hold your breath What are the consequences of breaking the most important rule in scuba diving? - Correct Answers ✅lung overexpansion injuries How does increasing depth affect how long your air supply lasts? - Correct Answers ✅it shortens it What's the most efficient way to breathe dense air underwater? - Correct Answers ✅take slow, deep breaths

Answers (Latest Update 2025) Verified

Answers

When selecting scuba equipment, what are the three most important factors? - Correct Answers ✅suitability, fit, and comfort How do you prepare a new mask for use? - Correct Answers ✅you may need to scrub the interior of the glass with a mask cleaner. main preparation is to adjust the strap. fit it over the crown of your head, above your ears, with a snug but not overly tightly fit. secure the strap locking device if it has one. What are two basic types of tank valves? - Correct Answers ✅yoke and DIN What's the difference between a DIN valve and a yoke valve?

• Correct Answers ✅the yoke system holds the first stage to the cylinder with a clamp system. with the DIN system, the regulator threads into the valve. What's the best way to keep water out of a scuba tank? - Correct Answers ✅to never completely empty it and store the cylinder in a standing position. Why do you need scuba tank visual inspections and pressure tests and how often are they done? - Correct Answers ✅to keep the maintenance of the cylinder and to know it is

Answers (Latest Update 2025) Verified

Answers

properly working. the visual inspection is done annually. the pressure test is done every two to five years. How does looking at something underwater affect its apparent size? - Correct Answers ✅the make them looker larger and/or closer How does water affect light intensity and color? - Correct Answers ✅as you go deeper, it gets darker and colors start to fade. How does being underwater affect hearing? - Correct Answers ✅sound travels over longer distances and more efficiently How should you move underwater to compensate for the increased resistance of water? - Correct Answers ✅slowly and steadily How do you breathe underwater for maximum efficiency? - Correct Answers ✅slowly and deeply what are eight symptoms of overexertion while diving? - Correct Answers ✅fatigue, labored breathing, a feeling of

Answers (Latest Update 2025) Verified

Answers

suffocation or air starvation, weakness, anxiety, headache, muscle cramping, and a tendency to panic what two properties may an exposure suit lose due to increased water pressure at depth? - Correct Answers ✅buoyancy and circulation why should you avoid an excessively tight-fitting hood? - Correct Answers ✅it it is too tight, it can restrict blood flow through your neck what's the most important feature of any weight system? - Correct Answers ✅the quick release how do you determine how much weight you need for a dive?

• Correct Answers ✅you want to wear just enough to offset your positive buoyancy, but not more. the second is the right distribution of weight.- trim. if you lose contact with your buddy underwater, what should you do? - Correct Answers ✅look for your buddy for no more than a minute, then reunite on the surface

Answers (Latest Update 2025) Verified

Answers

how can you obtain an orientation to an unfamiliar aquatic environment? - Correct Answers ✅PADI Discover Local Diving experience what's the definition of "underwater visibility"? - Correct Answers ✅you measure visibility as the distance you can see horizontally underwater What four principle factors affect underwater visibility? - Correct Answers ✅water movement, weather, plankton, and bottom composition how do you avoid the problems associated with diving in clear water? - Correct Answers ✅using a reference and staying two seconds away from your buddy in most circumstances, which way should you go when there's a mild current present? - Correct Answers ✅into the current what are the two basic classifications for interaction between divers and aquatic life? - Correct Answers ✅passive and active intereactions

Answers (Latest Update 2025) Verified

Answers

what causes nearly all injuries from aquatic life? - Correct Answers ✅human carelessness what should you do if you see an aggressive animal underwater? - Correct Answers ✅watch it and enjoy the experience. remain still and calm on or near the bottom and don't swim toward the creature. what are the signs of diver in distress? - Correct Answers ✅mask on forehead or no mask, not using their breathing equipment, wide, unseeing eyes, quick and jerky movements, and do not follow instructions. what, in order or priority, are the five low-on-air/out-of-air emergency procedures? - Correct Answers ✅Make a normal ascent Ascend using an alternate air source Ascend using a controlled emergency swimming ascent Make a buoyant emergency ascent how do you breathe from a free-flowing regulator? - Correct Answers ✅Don't seal your mouth on the regulator, old the regulator in your hand and press the mouthpiece to the outside of your lips, inserting one corner if your like, breathe the air you need letting the excess air escape.

Answers (Latest Update 2025) Verified

Answers

what are the four general procedures for dealing with an unresponsive diver in the water? - Correct Answers ✅1. establish buoyancy for the victim and for yourself. Inflate both BCDs and/or drop weights as necessary.

2. call for help to the boat or shore.
3. check for breathing and if not breathing give rescue breaths
4. continue rescue breathing what should you do for a diver suspected of breathing contaminated air? - Correct Answers ✅make them breathe fresh air and give emergency oxygen if available. provide CPR if required. Contact emergency care. how do you prevent problems with contaminated air? - Correct Answers ✅get your cylinder filled only at reputable scuba air sources and have your tank checked regularly what are five symptoms of nitrogen narcosis? - Correct Answers ✅Impairs the diver's judgement and coordination, may create a false sense of security, cause disregard for safety and other foolish behavior, feel anxious or uncomfortable which can lead to panic or other poor decisions.

Answers (Latest Update 2025) Verified

Answers

what should you do if nitrogen narcosis becomes a problem? - Correct Answers ✅stop and signal your buddy. ascend, wait, and see if it goes away. how do you prevent nitrogen narcosis? - Correct Answers ✅avoiding deep dives what condition occurs when a diver exceeds established depth and time limits, producing bubbles in the body during and following ascent? - Correct Answers ✅decompression sickness what signs and symptoms are associated with decompression sickness? - Correct Answers ✅paralysis, dizziness, tingling, join and limb pain, shock, numbness, difficulty breathing, weakness and prolonged fatigue, in severe cases, unconsciousness and death. what is the necessary treatment for a diver suspected of having decompression illness? - Correct Answers ✅require treatment in a recompression chamber what is the first aid procedure for assisting someone with decompression illness? - Correct Answers ✅diver should stop all diving, check for breathing, provide CPR as needed, contact emergency medical care, keep the diver lying down

Answers (Latest Update 2025) Verified

Answers

and provide emergency oxygen, monitor the diver and take steps to prevent shock, if the diver is unresponsive but breathing normally, lay the diver level, left side down, head supported, breathing oxygen, continue this care until emergency medical personnel arrive. how do you avoid decompression sickness? - Correct Answers ✅by not exceeding established depth and time limits when diving and then surfacing. what are meant by no decompression/no-stop diving and decompression diving? - Correct Answers ✅no-stop/no decompression diving is when you plan a dive so that you can, if necessary, swim directly to the surface without unacceptable risk of decompression sickness. what is a no decompression limit (NDL)? - Correct Answers ✅A no stop limit is the maximum time you can spend at a given depth and still ascend directly to the surface. what is bottom time? - Correct Answers ✅the amount of time you are underwater. what are the general rules for using the Recreational Dive Planner, how do you apply them? - Correct Answers ✅Bottom time, any dive less than 35ft is calculated as 35ft,

Answers (Latest Update 2025) Verified

Answers

use the exact or next greater depth shown for the depths of all dives, use the exact or next greater time shown for the time of all dives, slowly ascend at 1 foot per second, always be conservative with limits, when it cold plan for 10ft deeper than it really is, plan repetitive dives so each successive dive is shallower than the last, limit all repetitive dives to 100ft or shallower, limit maximum depth to your training and experience level, and don't exceed RDP limits. what is the maximum depth limit for all recreational diving? - Correct Answers ✅18m/60ft what is residual nitrogen? - Correct Answers ✅the nitrogen left in your body after a dive what is a pressure group? - Correct Answers ✅A letter representing how much nitrogen is in the blood. What is a surface interval (SI)? - Correct Answers ✅How long you stay on the surface between two dives. What is residual nitrogen time (RNT)? - Correct Answers ✅Time in minutes of how much nitrogen is in the body.

Answers (Latest Update 2025) Verified

Answers

what is an adjusted no decompression limit? - Correct Answers ✅Used for a second dive when you already have nitrogen in your system. What is a dive profile? - Correct Answers ✅A graphic representation of a dive with pressure groups, depths, and times. what is actual bottom time (ABT)? - Correct Answers ✅is the number of minutes that one should not exceed in a repetitive dive what is total bottom time (TBT)? - Correct Answers ✅the number of residual nitrogen time plus actual bottom time in a repetitive dive how do you calculate the total bottom time of a repetitive dive? - Correct Answers ✅add RNT and ABT what are the minimum surface intervals that must be made when planning three or more dives when:

1. ending pressure group after any dive is W or X?
2. ending pressure group after any dive is Y or Z? - Correct Answers ✅1. 1 hour 2. 3 hours

Answers (Latest Update 2025) Verified

Answers

what are the recommended depth and time for a safety stop?

• Correct Answers ✅3 minutes at 15ft what's the purpose of a safety stop? - Correct Answers ✅to allow any extra absorb nitrogen to be released what are three situations in which a safety stop is considered required? - Correct Answers ✅1. Your dive has been to 30 m or 100 feet or deeper

2. Your pressure group at the end of the dive is within three pressure groups of the no decompression limit on the RDP
3. You reach any limit on the recreational dive planner or your dive computer what should you do if you exceed a no decompression limit or an adjusted no decompression limit by 5 minutes or less when using the RDP? - Correct Answers ✅8 minute decompression stop at 15ft is mandatory. Diver must remain out of the water for at least 6 hours prior to making another dive what should you do if you exceed a no decompression limit or an adjusted no decompression limit by more than 5 minutes when using the RDP? - Correct Answers ✅15 minute decompression stop at 15ft is urged. Diver must reamin out

Answers (Latest Update 2025) Verified

Answers

of the water for at least 24 hours prior to making another dive. what are the recommendations for flying in a commercial airline after diving? - Correct Answers ✅for single-dives a minimum pre-flight surface interval of 12 hours is suggested. for repetitive dives and/or multi-day dives a minimum pre- flight surface interval of 18 hours is suggested. what are the rules when using a dive computer? - Correct Answers ✅1. dive the plan

2. stay well within your computer's limits
3. follow the most conservative computer
4. watch your SPG
5. start at your deepest point and go shallower
6. ascend slowly, well within your computer's ascent rate, and make a safety stop at 5m/15ft for three minutes or longer.