PADI OPEN WATER DIVER FINAL EXAM QUESTIONS WITH CORRECT ANSWERS RATED A+

As you descend in water the pressure - increases A depth change of 10 meters/33 feet causes a pressure change of - 2 bar/ata if you take 6 liters of air from the surface to 20 metres/66 feet, the volume will be - 2 liters The density of the air at 20 meters/66 feet would be _______ the density at the surface of - three times A balloon fully inflated and sealed at 10 meters/33 feet, would probably ________ during ascent to the surface. - expand/burst As I descend, increasing pressure affects my _________ - mask, ears, sinuses A squeeze is caused by - a pressure imbalance between the surrounding 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 discovering I can't equalize. The first thing I would do is - stop my descent and signal my buddy/the instructor 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 (T/F) - 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 (T/F) - true During ascent I feel discomfort in my ears. I should - stop, descend slightly and allow trapped air to work its way out Depth 0m/0ft what is the pressure, volume and density - 1 bar/ata, 1 volume, 1x density Depth 10m/33ft what is the pressure, volume and density - 2 bar/ata, 1/2 volume, 2x density Depth 20m/66ft what is the pressure, volume and density - 3 bar/ata, 1/3 volume, 3x density Depth 30m/99ft what is the pressure, volume and density - 4 bar/ata, 1/4 volume, 4x density As I descend, I need to equalize air spaces. Which of the following are accepted ways of equalizing my ears? a. Block my nose and attempt to gently blow through it. b. Swallow and wiggle the jaw from side to side c. Block my nose and blow forcefully for an extended period - Block my nose and attempt to gently blow through it + swallow and wiggle the jaw from side to side I should equalize a. early and often, before I feel discomfort b. when I begin to feel discomfort c. only if I experience pain - early and often, before I feel discomfort I should not dive with a cold, nor use medications to dive with a cold. True or False - True Failure to follow the most important rule in scuba diving can cause serious lung overexpansion (lung rupture) injuries, which in turn can cause paralysis and death. True or False - True During a descent, I try to equalize but discover I'm having trouble doing so. Which of the following is correct? a. Slow my descent, signal my buddy to slow down and equalize more forcefully b. Stop my descent, signal my buddy to slow down and try again c. Continue my descent while equalizing repeatedly d. Signal my buddy, ascend to the surface and start my descent over the - Stop my descent, signal my buddy to slow down and try again My buddy and I are planning a dive to 18m/60ft. We would expect our air supply to last _______ at 10m/33ft, all else being the same. a. longer than b. shorter than c. the same as - shorter than During a dive, I swim hard to keep up with the fish that interests me, but shortly I begin to feel like I can't get enough air. The correct action would be to: a. Signal my buddy and head up to the surface b. Use the regulator purge button to boost air flow c. Stop all activity and rest to restore proper deep, slow breathing - Stop all activity and rest to restore proper deep, slow breathing An object that is neutrally buoyant in fresh water will ______ in salt water. a. sink b. float c. be neutrally buoyant - float The ocean has more - buoyancy compared to fresh water The three overall benefits of the buddy system are practicality, safety, and fun. True or False - True The primary considerations when choosing any piece of scuba gear are: a. suitability b. brand c. fit d. comfort - suitability, fit, and comfort I'm planning to dive the following week and am checking my gear. I put my kit together and notice that my regulator seems to breathe harder than I remember. The appropriate action would be to: a. Have it inspected and serviced as needed by a professional before using it b. Go ahead and use it, but limit my dive depth to 10metres/33feet c. Wash it in fresh water and see if the problem persists - have it inspected and serviced as needed by a professional before using it There is no way to use a DIN regulator on a yoke cylinder valve. True/False - False It is important to master buoyancy control because it allows me to control whether I descend, float or am neutrally buoyant. I adjust my buoyancy frequently while diving. True/False - True I take a colorful fish identification slate with me while diving. Looking at the slate underwater at 12metres/40feet, I would expect the slate to look a. smaller/farther away b. more colorful c. less colorful d. larger/closer - less colorful and larger/closer While underwater, I want to move efficiently by: a. moving as quickly as possible b. being streamlined c. having just a little more weight than I actually need d. swimming slowly and steadily e. maintaining proper trim - being streamlined, swimming slowly and steadily, and maintaining proper trim During a dive, I can't stop shivering. The proper response would be to a. exit the water immediately, dry off, and seek warmth b. exit the water as planned, but wear more exposure protection next time c. exit the water when convenient, and swim rapidly to warm up - exit the water immediately, dry off and seek warmth During a dive, my buddy and I have to swim hard because of an unexpected current. If I were to begin to feel fatigued, have labored breathing, experience a feeling of suffocation or air starvation, and perhaps feel like I may panic, I should a. signal "up" and head to the surface b. switch to an alternate air source c. stop all activity, signal my buddy and rest - stop all activity, signal my buddy and rest When planning our dive, my two buddies and I agreed that the general procedure for buddy separation would be adequate. If during the dive I find I am with one buddy but can't see the other, which of the following applies? a. This is buddy separation. Stay with the remaining buddy and search for no more than a minute, then reunite on the surface. b. This is a buddy separation. Stay with the remaining buddy, return to where the missing buddy was last seen and wait. c. This is a buddy separation. the remaining buddy and I should split up and look for the missing buddy. d. This is not a buddy separation for the remaining buddy and me. Stay with the remaining buddy and continue the dive while the one who is missing looks for us. - This is buddy separation. Stay with the remaining buddy and search for no more than a minute, then reunite on the surface. The buddy system is ________ responsibility. a. my buddy's b. the divemaster's c. my d. no one's - my My fin strap comes loose (later I discover that I didn't buckle it properly) while swimming at the surface in choppy waves. Which of the following habits would help me as I handle this problem? a. Having my mask on and a mouthpiece in my mouth. b. Having enough air in my BCD for adequate buoyancy c. Staying close to and signaling my buddy - all of them I'm about to begin a descent with my buddy. Which of the following steps should I take before actually beginning my descent? a. equalize my ears b. orient myself to something at the surface c. check that my computer is active d. confirm that my buddy is ready e. add air to my BCD - orient myself to something at the surface, check that my computer is active, and confirm that my buddy is ready My buddies and I are wearing wet suits for exposure protection. As I descend, my buoyancy will __________, so I should ___________ to control my buoyancy. a. remain constant, do nothing b. increase, release air infrequently from my BCD in large amounts c. increase, release air frequently from my BCD in small amounts d. decrease, add air infrequently to my BCD in large amounts e. decrease, add air frequently to my BCD in small amounts - decrease, add air frequently to my BCD in small amounts I should never descend or ascend without a reference that I can follow or make contact with. a. True b. False - False As a prudent, conservative diver, the following are normal parts of my ascents: a. ascending at 18 m/60 ft per minute (or slower if specified by my computer) b. inflating my BCD to begin my ascent c. stopping for 3 minutes at approximately 5 m/15 ft d. adjusting my buoyancy in small amounts frequently - ascending at 18m/60ft per minute (or whatever the computer says), stopping for 3 minutes at approximately 5m/15ft, and adjusting my buoyancy in small amounts frequently While boat diving, my buddy and I finish our safety stop and ascend to the surface. When I reach the surface, I should a. Switch to my snorkel, inflate my BCD and signal "okay" to the dive master b. Signal "okay" to the dive master, switch to my snorkel and inflate my BCD c. Inflate my BCD, switch to my snorkel and signal "okay" to the divemaster - inflate my BCD, switch to my snorkel and signal okay to the divemaster Match the letter with the characteristics of the exposure suit type: a. insulation provided by layer of air and undergarment b. proper fit is important to keep water trapped against your body c. little or no insulation wet suit dry suit skin suit - a = dry suit b = wet suit c = skin suit Which of the following can be a problem before the dive when diving on a warm day in a wet or dry suit? a. proper weighting b. entering the water c. overheating d. hypothermia - overheating If I have only one cutting tool, the recommendation is that I wear it where ___________ hand can reach it a. my right b. my left c. my dominant d. either - either What are the three primary instruments used on all dives? - SPG (submersible pressure gauge), dive computer, and compass Which cutting tool is a bladed hook for cutting fishing line or net? a. dive knife b. dive tool c. dive shears d. z-knife - z-knife Five Point Descent - 1. confirm that your buddies are ready 2. orient yourselves to something at the surface or underwater, such as the boat or landmark 3. Switch from 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 Five Point Ascent - 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, swim up gently 4. Ascend slowly, no faster than dive computer 5. look up and turn as you ascend and stay with your buddies. Watch for obstacles and reach up as near surface Predive Safety Check: Begin With Review And Friend - BCD Weight (check for right amount of weight) Releases (secure and location of releases) Air (test regulator and check air pressure) Final check (look over) One way to avoid disorientation while descending and ascending is to a. close my eyes b. stay away from any objects c. follow a reference d. monitor my air supply closely - follow a reference