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.

What is the main purpose of a submersible pressure gauge (SPG)?

To monitor depth
To measure tank pressure
To check oxygen levels
To determine water temperature

The correct answer is: To measure tank pressure

The main purpose of a submersible pressure gauge (SPG) is to measure tank pressure. The SPG provides divers with real-time information on the remaining air supply in the scuba tank, which is crucial for dive planning and safety. By understanding how much air is left in the tank, divers can make informed decisions about their ascent and manage their dive time effectively to avoid running out of air while underwater. Monitoring tank pressure is essential for ensuring that divers do not exceed their safe limits, allowing them to maintain control over their dive profile, and ensuring they have enough air for both the ascent and any necessary safety stops. This instrument is vital for overall dive safety and planning.