OPEN WATER DIVER Scuba Diving Final Exam Questions and Answers (2024 / 2025) (Verified Answers)PDF

1. What will the buoyancy of an object be (positive, neutral, or negative) if it displaces an amount of water Answer a. more than its own weight? b. less than its own weight? c. equal to its own weight? Answer a. positive Answer b. negative Answer c. neutral 2. How does the buoyancy of an object differ in fresh water compared to salt water. Answer Because salt water weighs more than fresh water, it causes more buoyancy (more upward force) 3. What is the relationship between increasing and decreasing depth and water pressure Answer With increasing depth the water pressure increases. With de- creasing depth the water pressure decreases. 4. What are the absolute pressures, air volume, and air density in atmos- pheres, for Answer a. 10m/33ft b. 20m/66ft Answer b. 30m/99ft Answer c. 40m/132ft Answer a. 2 bar/ata, 1/2, x 2 b. 3 bar/ata, 1/3, x 3 c. 4 bar/ata, 1/4, x4 d. 5 bar/ata, 1/5, x5 What is the relationship between air volume and density, and how do they vary according to this relationship when pressure increases or decreases Answer - Air volume and density change proportionately with pressure. As pressure increas- es, air volume decreases, and air density increases. As pressure decreases, air volume increases, and air density decreases