Scuba certification Exam Questions With Complete Solutions

SCUBA CERTIFICATION EXAM QUESTIONS WITH CORRECT SOLUTIONS What will the buoyancy of an object be (positive, neutral, or negative) if it displaces an amount of water: a. more than its own weight? b. less than its own weight? c. equal to its own weight? - Correct Answersa. positive b. negative c. neutral How does the buoyancy of an object differ in fresh water compared to salt water. - Correct AnswersBecause salt water weighs more than fresh water, it causes more buoyancy (more upward force) What is the relationship between increasing and decreasing depth and water pressure? - Correct AnswersWith increasing depth the water pressure increases. With decreasing depth the water pressure decreases. What are the absolute pressures, air volume, and air density in atmospheres, for: a. 10m/33ft b. 20m/66ft b. 30m/99ft c. 40m/132ft - Correct Answersa. 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? - Correct AnswersAir volume and density change proportionately with pressure. As pressure increases, air volume decreases, and air density increases. As pressure decreases, air volume increases, and air density decreases. What is a "squeeze"? - Correct AnswersA pressure imbalance that pushes tissues into an air space. What is "equalization"? - Correct AnswersThe process of adding air to an air space.