SDI Open Water Scuba Diver Practice Exam

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Prepare for the SDI Open Water Scuba Diver Exam. Study comprehensively with flashcards and multiple choice questions, detailed explanations aid understanding. Gear up for your certification!

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.

When clearing a mask filled with water, how should you form a seal?

Pushing in at the top and sides
Pulling at the bottom of the mask
Keeping the mask completely flat against your face
Bending your head back

The correct answer is: Pushing in at the top and sides

To effectively clear a mask filled with water, forming a proper seal is essential for preventing further water intrusion. The correct method involves pushing in at the top and sides of the mask. This action helps to create an airtight seal around the edges of the mask, allowing you to control the release of water while ensuring that the mask remains snug against your face. When you push in at the top, you are also aiding in the alignment of the mask so that it can sit flush against your forehead, minimizing the chances of leakage. Simultaneously, the pressure applied to the sides helps to conform the mask securely around the contours of your face, which is crucial when you are ready to allow air to escape and push the water out of the bottom of the mask. On the other hand, pulling at the bottom of the mask can actually create gaps that allow water to flow back in, while keeping the mask completely flat against your face lacks the necessary adjustments to foster an optimal seal. Bending your head back is not advisable either, as it may disrupt the mask's positioning and lead to a loss of the intended seal. Thus, the action of pushing in at the top and sides not only establishes a tight fit but also allows for an efficient clearing process.