Air for medical use in a hospital should be which of the following? 1. Particle-free 2. Oil-free 3. Dry
a. 1 and 2 only
b. 1 and 3 only
c. 2 and 3 only
d. 1, 2, and 3
ANS: D
For medical gas use, air must be dry and free of oil or particulate contamination.
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