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Scuba Equipment Assembly & Function Flashcards

7 cards from real PADI practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Scuba Equipment Assembly & Function flashcards as text

  1. When attaching a BCD to a scuba cylinder, what is the correct position of the tank valve relative to the BCD backpack?

    Answer: Valve facing the diver's back with the opening up

    The tank valve should face the diver's back with the opening pointing upward so the regulator first stage can be attached correctly.

  2. What is the purpose of the purge button on a second stage regulator?

    Answer: To manually release air to clear the mouthpiece

    Pressing the purge button manually opens the valve to flush air through the mouthpiece, clearing water or debris.

  3. Which type of BCD inflator mechanism uses the diver's breath to add air to the bladder?

    Answer: Oral inflator

    The oral inflator allows divers to blow air into the BCD bladder by breathing into the inflator mouthpiece.

  4. A diver notices the submersible pressure gauge reads full even after several minutes of breathing. What is the most likely cause?

    Answer: The SPG hose is kinked or the gauge is faulty

    A gauge that doesn't move despite active breathing likely has a blocked hose or a defective pressure gauge that should not be used.

  5. What does it mean when a regulator is described as 'environmentally sealed'?

    Answer: Internal parts are protected from freezing water or contaminants

    An environmentally sealed first stage uses a dry chamber or special diaphragm to prevent water from contacting internal parts, reducing freeze-up risk.

  6. When threading a DIN regulator first stage onto a cylinder valve, how should you verify a proper connection?

    Answer: Confirm the O-ring is visible and hand-tighten until snug with no gaps

    The DIN fitting should be hand-tightened until flush and snug; gaps or cross-threading indicate a poor seal.

  7. What should a diver do if they hear continuous bubbling from the first stage regulator during the pre-dive equipment check?

    Answer: Do not dive — the regulator has a leak and needs servicing

    Continuous bubbling indicates a leak in the first stage, which can rapidly deplete air supply and should be serviced before diving.