- /
18
PADI OPEN WATER STUDY GUIDE EXAM
Actual Questions & Correct Answers 1.When is an object positively buoyant?Answer When it displaces a volume of water weighing more than its own weight.
2.When is an object negatively buoyant?Answer When it displaces a volume of water weighing less than its own weight.
3.When is an object neutrally buoyant?Answer When it displaces a volume of water weighing the same as its own weight.
4.Why two pieces of equipment do you use to control your buoyancy?Answer BCD, Lead weight 5.What does buoyancy help with when you are underwater?Answer Controlling where you are 6.What does buoyancy help with when you are at the surface? 1 / 3
- /
18 Answer Floatation, conserving energy 7.How does the buoyancy of an object differ in fresh/salt water?Answer More buoyant in salt than fresh 8.When you exhale what happens?Answer Lung volume decreases so you have less buoyancy.
9.When you inhale what happens?Answer Lung volume increases so you have more buoyancy.
10.Why don't you feel air pressure?Answer Your body is primarily liquid, which is incompressible and distribute pressure equally throughout your whole body.
11.Where are some air spaces located in the body?Answer Ears, sinuses, lungs 12.Do you always feel the pressure in body air spaces?Answer Only if the pressure is different inside and outside the air spaces.
13.1 bar is what depth?Answer 0m/0ft 2 / 3
- /
- / 3
18 14.2 bar is what depth?Answer 33ft/10m 15.3 bar is what depth?Answer 66ft/20m 16.4 bar is what depth?Answer 99ft/30m 17.How is air volume affected when depth is increased?Answer It decreases 18.How is air density affected when depth is increased?Answer It increases 19.What happens if you take an air volume underwater with you in a flexible container or inverted jar?Answer As pressure increases the volume decreases, same air but smaller space.
20.How do you maintain air volume as you descend?Answer Equalize 21.What is a "squeeze"?Answer As volume decreases, pressure pushes body tissues inwards