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NFPA 99 2018 Practice Test Questions : Worksheet 4 Questions with Accurate Answers 
 

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---7augustus 20262026/2027A
- Category 1 Medical-Surgical vacuum central supply systems shall, at a minimum, consist of ______ or more vacuum pumps. 
 
a) one 
b) two 
c) three 
d) four - ANSWERStwo 
 
5.1.3.7.1.1 (1) 
 
Category 1 Medical-surgical vacuum central supply systems shall consist of an automatic means to prevent ______ through any off-cycle vacuum pump. 
 
a) vacuum 
b) back pressure 
c) backflow 
d) all of the above - ANSWERSbackflow 
 
5.1.3.7.1.1 (2) 
 
Piping between the vacuum pump and the source shutoff val...
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