SDI Open Water Scuba Diver Practice Exam

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Prepare for the SDI Open Water Diver Exam. Dive into multiple choice questions, hints, and explanations to gear up for the certification. Start your underwater adventure today!

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

Practice this question and more.

Why is it important to achieve a seal when clearing a mask?

To prevent water from leaking in
To make the clearing process difficult
To ensure the mask fits tightly at all times
To create a vacuum effect

The correct answer is: To prevent water from leaking in

Achieving a proper seal when clearing a mask is crucial because it prevents water from leaking in during the process. When a diver needs to clear their mask, they may experience some water entering due to changes in pressure or movement. A good seal ensures that the water does not re-enter the mask after the initial clearance, allowing the diver to maintain clear vision and focus on their surroundings underwater. Maintaining a proper seal is essential for ensuring that the clearing process is effective, allowing the diver to easily expel water without the risk of it flowing back in. A well-fitted mask enhances comfort and safety, contributing to an overall better diving experience.