Review questions
Chapter 7
1. Decontamination is defined as the
a. killing of all microorganisms in a given area.
b. reduction or removal of unwanted chemical
or biological agents.
c. stopping of growth of microorganisms in a given area.
d. removal of all vegetative organisms.
2. Which of the following organisms has higher resistance to most
physical control methods than the others?
a. Protozoan cysts
b. Fungal spores
c. Enveloped viruses
d. Vegetative bacterial cells
3. The cleaning of glassware and tableware in restaurants falls in the
category of
a. degermination.
b. sterilization.
c. disinfection.
d. sanitation.
4. Which of the following methods is the simplest heat-related method to
sterilize metal?
a. Boiling
b. Autoclaving
c. Direct flaming
d. Indirect heating
5. Boiling items in water for __________ minutes will kill most vegetative
bacteria and viruses.
a. 3 to 5
b. 5 to 6
c. 6 to 8
d. 10 to 15
6. The technique that combines freezing and drying to preserve microbes
and other cells is
, a. desiccation.
b. lyophilization.
c. pasteurization.
d. radiation.
7. Ionizing radiation involves all of the following except
a. UV light.
b. gamma rays.
c. electron beams.
d. X-rays
8. The term zone of inhibition is used in which of the following
procedures?
a. Use-dilution test
b. Growth inhibition test
c. Disk-diffusion test
d. Multiple inhibition test
9. Chlorine belongs to which of the following chemical groups?
a. Halogens
b. Heavy metals
c. Phenols
d. Alcohols
10. All of the following are methods for food preservation except
a. pasteurization.
b. sterilization.
c. irradiation.
d. ultrahigh-temperature pasteurization.
11. The destruction of vegetative organisms by chemical or physical
methods is called disinfection.
12. The term used to describe an agent that causes microbial growth
to come to a standstill is microbistatic agent.
13. The lowest temperature at which all microorganisms in a
particular liquid will be killed within 10 minutes is the thermal
death point (TDP).
14. Antimicrobial agents that are specifically designed to be used on
living tissues are referred to as Antiseptics.
Chapter 7
1. Decontamination is defined as the
a. killing of all microorganisms in a given area.
b. reduction or removal of unwanted chemical
or biological agents.
c. stopping of growth of microorganisms in a given area.
d. removal of all vegetative organisms.
2. Which of the following organisms has higher resistance to most
physical control methods than the others?
a. Protozoan cysts
b. Fungal spores
c. Enveloped viruses
d. Vegetative bacterial cells
3. The cleaning of glassware and tableware in restaurants falls in the
category of
a. degermination.
b. sterilization.
c. disinfection.
d. sanitation.
4. Which of the following methods is the simplest heat-related method to
sterilize metal?
a. Boiling
b. Autoclaving
c. Direct flaming
d. Indirect heating
5. Boiling items in water for __________ minutes will kill most vegetative
bacteria and viruses.
a. 3 to 5
b. 5 to 6
c. 6 to 8
d. 10 to 15
6. The technique that combines freezing and drying to preserve microbes
and other cells is
, a. desiccation.
b. lyophilization.
c. pasteurization.
d. radiation.
7. Ionizing radiation involves all of the following except
a. UV light.
b. gamma rays.
c. electron beams.
d. X-rays
8. The term zone of inhibition is used in which of the following
procedures?
a. Use-dilution test
b. Growth inhibition test
c. Disk-diffusion test
d. Multiple inhibition test
9. Chlorine belongs to which of the following chemical groups?
a. Halogens
b. Heavy metals
c. Phenols
d. Alcohols
10. All of the following are methods for food preservation except
a. pasteurization.
b. sterilization.
c. irradiation.
d. ultrahigh-temperature pasteurization.
11. The destruction of vegetative organisms by chemical or physical
methods is called disinfection.
12. The term used to describe an agent that causes microbial growth
to come to a standstill is microbistatic agent.
13. The lowest temperature at which all microorganisms in a
particular liquid will be killed within 10 minutes is the thermal
death point (TDP).
14. Antimicrobial agents that are specifically designed to be used on
living tissues are referred to as Antiseptics.
