(9) Controlling Microbial Growth in the Environment Sample Quiz
Which of the following items functions most like an autoclave? A boiling pan An incinerator A desiccator A pressure cooker
A pressure cooker
Which of the following disinfectants contains alcohol? An iodophor A quat Formalin A tincture of bromine
A tincture of bromide
The microbial death rate is used to measure ___. the efficiency of a detergent the efficiency of an antiseptic the efficiency of sanitization techniques All of these.
All of these.
Which of the following statements is true concerning the selection of an antimicrobial agent? An ideal antimicrobial agent is stable during storage. An ideal antimicrobial agent is fast acting. Ideal microbial agents do not exist. All of these.
All of these.
Which of the following adjectives best describes a surgical procedure that is free of microbial contaminants? Disinfected Sanitized Degermed Aseptic
Aseptic
The spores of which organism are used as a biological indicator of sterilization? Bacillus stearothermophilus Salmonella enterica Micobacterium tuberculosis Staphylococcus aureus
Bacillus stearothermophilus
A sample of E. coli has been subjected to heat for a specified time, and 90% of the cells have been destroyed. Which of the following terms best describes this event? Thermal death point Thermal death time Decimal reduction time None of these.
Decimal reduction time
The preservation of beef jerky from microbial growth relies on which method of microbial control? Filtration Lyophilization Desiccation Radiation
Desiccation
Which of the following substances or processes kills microorganisms on laboratory surfaces? Antiseptics Disinfectants Degermers Pasteurization
Disinfectants
Biosafety Level 3 includes ___. Double sets of entry doors Pressurized suits Showers in entryways All of these.
Double sets of entry doors
Which of the following types of radiation is more widely used as an antimicrobial technique? Electron beams Visible light waves Radio waves Microwaves
Electron beams
Which antimicrobial chemical has been used to sterilize spacecraft? Phenol Alcohol Heavy metal Ethylene oxide
Ethylene oxide
Which of the following chemicals is active against bacterial endospores? Copper ions Ethylene oxide Ethanol Triclosan
Ethylene oxide
Which of the following substances is least toxic to humans? Carbolic acid Glutaraldehyde Hydrogen peroxide Formalin
Hydrogen peroxide
Which of the following substances would most effectively inhibit anaerobes? Phenol Silver Ethanol Hydrogen peroxide
Hydrogen peroxide
A company that manufactures an antimicrobial cleaner for kitchen counters claims that its product is effective when used in a 50% water solution. By what means might scientists best verify this statement? Disk-diffusion test Phenol coefficient Filter paper test In-use test
In-use test
Which of the following disinfectants acts against cell membranes? Phenol Peracetic acid Silver nitrate Glutaraldehyde
Phenol
Which class of surfactants is most soluble in water? Quaternary ammonium compounds Alcohols Soaps Peracetic acids
Quaternary ammonium compounds
Which of the following terms best describes the disinfecting of cafeteria plates? Pasteurization Antisepsis Sterilization Sanitization
Sanitization
In practical terms, which of the following statements provides the definition of sterilization? Sterilization eliminates all organisms and their spores or endospores. Sterilization eliminates harmful microorganisms and viruses. Sterilization eliminates prions. Sterilization eliminates hyperthermophiles.
Sterilization eliminates all organisms and their spores or endospores.
