PADI Open Water Exam Study Guide Questions And Answers

PADI Open Water Exam Study Guide Questions And Answers When is an object positively buoyant? - ANS When it displaces a volume of water weighing more than its own weight. When is an object negatively buoyant? - ANS When it displaces a volume of water weighing less than its own weight. When is an object neutrally buoyant? - ANS 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? - ANS BCD, Lead weight What does buoyancy help with when you are underwater? - ANS Controlling where you are What does buoyancy help with when you are at the surface? - ANS Floatation, conserving energy How does the buoyancy of an object differ in fresh/salt water? - ANS More buoyant in salt than fresh When you exhale what happens? - ANS Lung volume decreases so you have less buoyancy. When you inhale what happens? - ANS Lung volume increases so you have more buoyancy. Why don't you feel air pressure? - ANS 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? - ANS Ears, sinuses, lungs Do you always feel the pressure in body air spaces? - ANS Only if the pressure is different inside and outside the air spaces.