Which is a disadvantage of using ultraviolet (UV) irradiation as a means of disinfection?
a. The rays can kill selective vegetative bacteria, fungi, and lipoprotein viruses.
b. UV rays may cause skin burns.
c. UV rays produce nonionizing radiant energy.
d. Pathogens have effective contact with the UV rays for destruction.
ANS: B
UV rays can cause burns similar to sunburns, and thus skin covering and protective goggles must be worn when exposed to them. Pathogens moving across the ray of UV light may not be exposed to radiant energy long enough for effective contact and destruction to occur.
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The Department of Labor's strategy developed in 2002 focuses on reducing:
a. fatalities b. musculoskeletal disorders c. accidents d. diseases
Small, balllike stools are often a result of ________
A) chronic constipation B) spastic bowel C) gastrointestinal infection D) slow movement through the bowel
Which of the following types of drug recalls does NOT involve harm to an individual?
Class I Class II Class III Class IV
The staging supervisor should be established near the scene.
a. true b. false