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  • Question
  • Which disinfectant was the most effective against Salmonella"?


  • Options
  • A. Phenol
  • B. Cetylpyridinium chloride
  • C. Hexachlorophene
  • D. Merthiolate

  • Correct Answer
  • Merthiolate 


  • Physical and Chemical Agents problems


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    • 1. Which of the following is sterilized with the help of glutaraldehyde?

    • Options
    • A. Thermometers
    • B. Bronchoscopes
    • C. Cystoscopes
    • D. All of these
    • Discuss
    • 2. Ethylene oxide is used to destroy or kill which of the following microbes?

    • Options
    • A. Bacteria
    • B. Spores
    • C. Fungi
    • D. All of these
    • Discuss
    • 3. For sterilization of which material gamma rays can be used?

    • Options
    • A. Catheters
    • B. Plastic syringes
    • C. Canulas
    • D. None of these
    • Discuss
    • 4. One drawback to the use of ultraviolet light as a sterilizing agent is its

    • Options
    • A. failure to kill bacteria
    • B. failure to bacterial spores
    • C. failure to kill microbes in a closed environment
    • D. failure to kill microbes located in the center of an object
    • Discuss
    • 5. Which of the following is a limitation of the autoclave?

    • Options
    • A. It takes too long to sterilize
    • B. It lacks the ability to inactivate viruses
    • C. It lacks the ability to kill endospores
    • D. It will destroy heat labile materials
    • Discuss
    • 6. Which of the following is bactericidal?

    • Options
    • A. Membrane filtration
    • B. Ionizing radiation
    • C. Freeze-drying
    • D. Deep freezing
    • Discuss
    • 7. Which of the following is most effective for sterilizing mattresses and plastic petri plates?

    • Options
    • A. Chlorine
    • B. Ethylene oxide
    • C. Glutaraldehyde
    • D. Ultraviolet radiation
    • Discuss
    • 8. Steam exposure of a material at 100°C for 20 minutes for three consecutive days is known as

    • Options
    • A. inspissation
    • B. tyndallization
    • C. autoclaving
    • D. none of these
    • Discuss
    • 9. Which is the most important surface active disinfectants?

    • Options
    • A. Amphoteric compounds
    • B. Cationic compounds
    • C. Non-ionic compounds
    • D. Anionic compounds
    • Discuss
    • 10. Which of the following material is sterilized by heating at 160°C in a hot air oven for one hour?

    • Options
    • A. Swab sticks
    • B. All-glass syringes
    • C. Oils and jellies
    • D. All of these
    • Discuss


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