Types of output control valves used in modern ventilators include which of the following? 1. Pneumatic diaphragm valve 2. Proportional valve 3. Electromagnetic poppet or plunger 4. Linear screw valve
a. 1 and 3 only
b. 1, 2, and 3 only
c. 3 and 4 only
d. 2, 3, and 4 only
ANS: B
Commonly used output control valves include the pneumatic diaphragm, electromagnetic pop-pet/plunger valve, and the proportional valve. Descriptions of these devices can be found in res-piratory care equipment textbooks.
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