Chapter 8: Control of microorganism

1.Which of the following methods results in the destruction or removal of all viable microorganisms?

• Disinfection

• B. Sanitization
  

• Sterilization

• Antisepsis

2.Which suffix indicates an agent that kills microorganisms?

• A. -static
  

• B. -cide
  

• C. -lysis
  

• • D. -philic

3.Which of the following agents inhibits the growth of fungi?

• A. Bactericide
  

• B. Fungistatic
  

• Virucide

• Algicide

4.What does pasteurization do?

• A. Sterilizes liquids completely
  

• B. Removes all microorganisms
  

• C. Kills pathogens and reduces spoilage organisms
  

• • D. Only filters solids

5.Which heat method uses steam under pressure to achieve sterilization?

• A. Dry heat
  

• B. Pasteurization
  

• C. Boiling
  

• Autoclaving

7.Which of the following chemical agents denatures proteins and disrupts membranes, and is used in hospitals?

• Phenolics

• B. Heavy metals
  

• C. Iodophors
  

• • D. Quats

8.Which gas is used to sterilize heat-sensitive materials and inactivates DNA and proteins?

• A. Ethylene glycol
  

• B. Ethylene oxide
  

• C. Hydrogen sulfide
  

• • D. Chlorine gas

9.Which term describes a chemical used on living tissue to prevent infection?

• A. Disinfectant
  

• B. Sterilant
  

• Antiseptic

• Detergent

10.Which test compares a disinfectant’s effectiveness to that of phenol?

• A. In-use test
  

• B. Phenol coefficient test
  

• C. Dilution test
  

• 1. D. Filter disk test

11.What does the D-value represent in microbial death curves?

• A. Number of dead microbes
  

• B. Time to double the population
  

• C. Time to kill 90% of population
  

• • D. Volume of disinfectant needed