To protect against back siphonage in high-hazard situations, hospitals and medical laboratories use special backflow preventers called _____.

a. in-line vacuum breakers
b. air-actuated check valves
c. dynamic backflow valves
d. pressure-differential actuators


a. in-line vacuum breakers

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A widely used accident prevention technique is:

A) CPR with AED B) Employer liability C) Fail-safe designs D) Fellow servant rule

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__________ is required by the plant in amounts second only to nitrogen and has numerous functions in a plant

Fill in the blank(s) with correct word

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In certain locations in the United States, the AHJ may not allow nonmetallic sheathed cable in residential construction. The alternative wiring method most often used is _____________.

Fill in the blank(s) with the appropriate word(s).

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A thorough preventative maintenance program is useless if not properly implemented.

Answer the following statement true (T) or false (F)

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