PADI Open Water Dive Exam 2023/2024 Graded A+

An object is positively buoyant when: - ANSWER-It displaces a volume of water weighing more than its own weight. What two pieces of equipment do you use to control your buoyancy? - ANSWER-BCD, Lead Weights Buoyancy control is one of the most important skills you can master because it allows you to control where you are in the water. (T/F) - ANSWER-True An object will be more buoyant in _____ than it would be in _______. - ANSWER-Salt Water, Fresh Water When you exhale, your lung volume decreases. This means you have _____ buoyancy. (more or less) - ANSWER-Less You usually feel pressure only in body air spaces because: - ANSWER-Your body is mostly made of incompressible liquid, but air is compressible and changes volume with pressure changes. Pressure changes inw ater for a given ascent or descent are much more substantial than the same distance ascent or descent in air because water weighs more (T/F) - ANSWER-True The three major air spaces affected by pressure when you descend are: - ANSWER-Mask, Ears, and sinuses A Squeeze is - ANSWER-A pressure imbalance in which pressure outside an air space exceeds pressure inside an air space, resulting in pain or discomfort Equalization is adding air to an air space as you descend so the pressure in an air space equals the surrounding water pressure (T/F) - ANSWER-True Which are techniques for equalizing your ears? - ANSWER-Pinch your nose and blow gently against it, swallow and wiggle your jaw from side to side You want to equalize your ears? - ANSWER-Every metre/few feet before you feel discomfort If you feel discomfort and can't equalize, ascend until you relieve the discomfort and try again. Don't be forceful in equalizing. If you can't equalize, discontinue dive. (T/F) - ANSWER-True The most important rule in scuba diving is: Breathe continuously and never hold your breath (T/F) - ANSWER-True Ascending while holding your breath: - ANSWER-Can cause lung overexpansion injuries Can cause serious injuries, including paralysis and death causes injuries that are easy to avoid by not holding your breath A reverse block is: - ANSWER-Pain and discomfort caused by expanding air trapped inside an air space during ascent. If you feel discomfort during ascent due to a reverse block, you should: - ANSWER-slow or stop your ascent and give the trapped air time to work its way out. As you go deeper, you consume air from your scuba cylinder _____. - ANSWER-Faster The most efficient method for breathing underwater is rapid and shallow. (T/F) - ANSWER-False You need a mask to see underwater because - ANSWER-The human eye can't focus underwater A mask needs to enclose your nose: - ANSWER-so you can equalize the mask The features you look for in a mask include - ANSWER-Low profile nose or finger pockets Wide vision field The most important factors when buying a mas (and other dive gear): - ANSWER-Fit and comfort To prepare a new mask for use: - ANSWER-scrub off the protective film left from manufacturing adjust the strap Maintenance for your mask (and most dive gear) includes: - ANSWER-Rinsing in fresh water after use storing in a coll, dry place You need a snorkel when scuba diving: - ANSWER-to conserve air while swimming or resting at the surface Make it easier to breathe when the surface is rough In case you have a long swim with an empty cylinder. An easy breathing snorkel has which features? - ANSWER-Large Bore