Sterilization Questions: Microbiology Quiz!

10 Questions | Total Attempts: 133

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Sterilization Questions: Microbiology Quiz!

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Questions and Answers
  • 1. 
    The initial microbial contamination level influences the time-dependent process( elimination of viable microorganisms)
    • A. 

      True

    • B. 

      False

  • 2. 
    The elevated temperatures generally associated with moist heat sterilization methods can only be achieved by:
    • A. 

      Pure ethylene oxide gas

    • B. 

      S broad-spectrum biocidal activity

    • C. 

      Oxidative processes

    • D. 

      Generation of steam under pressure

  • 3. 
    Which of the following is CORRECT:
    • A. 

      Porous loads (i.e. dressings) are of the types of  ‘portable’ sterilizers

    • B. 

       large-scale sterilizers generally have internal electric heaters

    • C. 

      Bottled fluid sterilizers employing a minimum temperature of 121°C.

    • D. 

      ‘portable’ sterilizers, for routine hospital or industrial use

  • 4. 
    Dry heat sterilization used for hydrogenation of glassware.
    • A. 

      True

    • B. 

      False

  • 5. 
    Which of the following is CORRECT regarding Sterilizer design and  Sterilizer operation.
    • A. 

      Shelves within the chamber are perforated to prevent cool spots developing inside the chamber. 

    • B. 

      A fixed temperature sensor connected to a chart recorder provides a permanent record of the sterilization cycle.

    • C. 

      Appropriate door-locking controls should be incorporated to  shorten the heating-up stage

    • D. 

      A fan is fitted to the rear of the oven to prevent interruption of a sterilization cycle once begun

  • 6. 
    Ethylene oxide sterilization needs a higher temperature than formaldehyde.
    • A. 

      True

    • B. 

      False

  • 7. 
    Which of the following is INCORRECT:
    • A. 

      Pure ethylene oxide gas can be used below atmospheric pressure in sterilizer chambers from which all air has been removed

    • B. 

      Formaldehyde  limits the packaging materials that can be employed to principally paper and cotton fabric.

    • C. 

       Formaldehyde cannot normally be detected by smell at concentrations lower than those permitted in the atmosphere

    • D. 

      Ethylene chlorohydrin are potentially mutagenic and carcinogenic  

  • 8. 
    Which of the following is CORRECT:
    • A. 

      Radiation sterilization is generally applied to articles in the aqueous state

    • B. 

      Radiation sterilization has not proved to be a method of industrial sterilization of heat-sensitive products.

    • C. 

      In the case of UV light , mould spores prove to be most resistant

    • D. 

      Electron or gamma-irradiation is not as efficient a sterilization method as UV irradiation

  • 9. 
    Which of the following is INCORRECT:
    • A. 

      Trapping within the matrix of the filter material is one of the mechanisms of filtration

    • B. 

      The principal application of sterilizinggrade filters related to the  venting systems on fermenters

    • C. 

      Filtration sterilization cannot be used for the clarification and sterilization of liquids and gases.

    • D. 

       UV light used  in the sterilization of the treatment of manufacturing-grade water.

  • 10. 
    Ethylene oxide gas is highly explosive in mixtures of >3.6% v/v in air.
    • A. 

      True

    • B. 

      False

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