Sprinkler systems supplied from a public water supply or private system are not required to have a backflow preventer installed

Which of the following are periods of no gas flow during negative pressure ventilation?

I. Inspiration II. End inspiration III. Expiration IV. End expiration a. II only c. IV only b. I and III only d. II and IV only

When ambulating with a single crutch or cane, the assistive device should be used on which side of the body?

A. Dominant side B. Nondominant side C. Uninjured side D. Injured side