PADI Open Water Exam Study Guide questions and answers latest top score.

PADI Open Water Exam Study Guide questions and answers latest top score. When is an object positively buoyant? - correct answers.When it displaces a volume of water weighing more than its own weight. When is an object negatively buoyant? - correct answers.When it displaces a volume of water weighing less than its own weight. When is an object neutrally buoyant? - correct answers.When it displaces a volume of water weighing the same as its own weight. Why two pieces of equipment do you use to control your buoyancy? - correct answers.BCD, Lead weight What does buoyancy help with when you are underwater? - correct answers.Controlling where you are What does buoyancy help with when you are at the surface? - correct answers.Floatation, conserving energy How does the buoyancy of an object differ in fresh/salt water? - correct answers.More buoyant in salt than fresh When you exhale what happens? - correct answers.Lung volume decreases so you have less buoyancy. When you inhale what happens? - correct answers.Lung volume increases so you have more buoyancy. Why don't you feel air pressure? - correct answers.Your body is primarily liquid, which is incompressible and distribute pressure equally throughout your whole body. Where are some air spaces located in the body? - correct answers.Ears, sinuses, lungs Do you always feel the pressure in body air spaces? - correct answers.Only if the pressure is different inside and outside the air spaces. 1 bar is what depth? - correct answers.0m/0ft 2 bar is what depth? - correct answers.33ft/10m 3 bar is what depth? - correct answers.66ft/20m 4 bar is what depth? - correct answers.99ft/30m How is air volume affected when depth is increased? - correct answers.It decreases How is air density affected when depth is increased? - correct answers.It increases What happens if you take an air volume underwater with you in a flexible container or inverted jar? - correct answers.As pressure increases the volume decreases, same air but smaller space. How do you maintain air volume as you descend? - correct answers.Equalize What is a "squeeze"? - correct answers.As volume decreases, pressure pushes body tissues inwards toward air space, causing discomfort. Pressure outside air space is more than pressure inside air space. Where can you get a squeeze? - correct answers.Ears, sinuses, mask, lungs, teeth How do you equalise air spaces in ears? - correct answers.Blow and squeeze nose, wiggle jaw, swallowing How often should you equalise? - correct answers.Every metre before discomfort What do you do if you feel discomfort? - correct answers.Ascend until discomfort eases, equalise, continue descent slowly Why can't you scuba while sick? - correct answers.Congestion can plug air passages so you can't equalize