The Flow-Rate Control on the BirdMark 7A Ventilator Works By

question 3

Multiple Choice

The flow-rate control on the BirdMark 7A ventilator works by:

• A) adjusting magnetic attraction against a diaphragm
• B) changing the size of an orifice
• C) adjusting pressure on a single-stage reducing valve
• D) changing the position of a needle valve

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