Which of the following statements about medical air supplies are false?
1. The air intake port must be located indoors.
2. The source of medical air must be from the outside atmosphere.
3. Most hospital bulk air supply systems use two compressors.
4. Backflow through the compressors that are cycled off must be prevented manually.
a. 1 and 4 c. 2 and 3
b. 1, 2, and 3 d. 3 and 4
ANS: A
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