7. Which of the following is used to remove microbes, but not inhibit or destroy

Question

7. Which of the following is used to remove microbes, but not inhibit or destroy them a. Filtration b. Dry heat c. Moist heat with steam d. lonizing radiation 8, Microbial agents that inhibit growth are termed age a. Microbistatic b. Microbicidal cStericidal d. Dangerous 9. The shortest length of time required to kill all test microbes at a specified temperature is the a. Thermal death point b. Thermal productivity quotient c. Thermal death time d. Thermal death equivalent 10. Which of the following does NOT need to be considered when using an autoclave to decontaminate materials? a. b. c. d. Whether the materials are heat sensitive Whether the materials are pressure sensitive Whether the materials are light sensitive Whether the materials are moisture sensitive 11. The use of non-pressurized steam to disinfect objects: a. Is called tyndallization b. Is used for sterilization c. Is effective after one treatment d. Is used when things need to be ready quickly 12. Which of the following methods for microbial control is the least effective? a. Heat b. Radiation c. Dessication d. All of these are equally effective 13. Which of the following methods for microbial control is the most effective (even against endospores)? a. Autoclaving b. Moist heat c. Non-ionizing radiation d. Filtration 14. Which of the following is NOT a desirable quality for chemicals used for microbial control? a. Soluble in water or alcohol b. Rapid action in low concentrations c. High toxicity d. Good penetrating power

Explanation / Answer

7) Option 'a' is the correct answer.

Filteration refers to the separation of microbes from a solution by means of a screen. It does not kills microbes.

8) Option 'a' is the correct answer.

Microbiostatics are the antimicrobial agents that inhibit the growth of microbes instead of killing them.

9) Option 'c' is the correct answer.

Thermal death time or TDT is the shortest length of time required to kill all test organisms at a specified temperature.

10) Option 'c' is the correct answer.

Autoclaving is a sterilization technique that involves steam along with pressure to kill microorganisms. As such, sensitivity to light is not a concern while autoclaving any matter.

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