The device that sits over the oxygen port and serves as a gasket and ensures an airtight seal between the regulator and the tank valve is the:

Which of the following is TRUE of MCI drills?

A) You should never tell anyone they are going to a drill, because they won't take it seriously. B) They are not necessary for small, rural departments. C) They are effective only if you can provide real-life moulage and props. D) All agencies should drill, and never say, "It will never happen here."

Which of the following is a criterion to identify fad diets? 

A. They include a wide variety of foods. B. They promise ease and comfort in weight loss. C. They require no special pills. D. They include an activity component. E. They may be safely followed for long periods of time.