Preclinical Final Exam Questions and
Answers 100% Pass
Sterilization failure is most often caused by:
a. The autoclave not working properly
b. Improper packaging
c. Overloading the steam autoclave sterilizer
d. Not reaching the effective temperature - ✔✔c. Overloading the steam autoclave
sterilizer
A chemical indicator is used on the outside of packaging to identify the items that have
been processed through the sterilizer. The chemical indicator changes color when the
packages are sterile.
a. Both statements are true
b. Both statements are false
c. The first statement is true; the second statement is false
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,d. The first statement is flase; the second statement is true - ✔✔c. The first statement is
true; the second statement is false
Which of the following statements is true regarding the handling of regulated infectious
waste?
a. Containers of infectious waste must be identified with the biohazard symbol
b. Infectious waste can be disinfected and then combined with the regular trash
c. Infectious waste must be sterilzed before leaving the oral health care setting
d. Infectious waste does not require any special handling in some states - ✔✔a.
Containers of infectious waste must be identified with the biohazard symbol
Glutaraldehyde is a high-level disinfectant/sterilant and can be used to sterilize heat-
sensitive items.
a. Both statements are true
b. Both statements are false
c. The first statement is true; the second is false
d. The first statement is false; the second is true - ✔✔a. Both statements are true
What is the maximum level of bacteria that the EPA allows in dental unit water?
Question options:
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,a. 100 CFU/mL
b. 300 CFU/ml
c. 500 CFU/ml
d. 800 CFU/ml - ✔✔c. 500 CFU/ml
Which of the following indicators is used to determine sterility?
Question options:
a. External indicator
b. Integrated indicator
c. Biologic indicator
d. Chemical indicator - ✔✔c. Biologic indicator
Which of the following methods or materials is the most effective for preventing
transmission of heaptitus B in the oral health care setting?
Question options:
a. Vaccination with HBV surface antigen
b. Disinfecting surfaces contaminated with HBV
c. Wearing double gloves for HBV carriers
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, d. Screening clients for active HBV infection - ✔✔a. Vaccination with HBV surface
antigen
The CDC recommends disinfecting clinical contact surfaces with an intermediate-level
disinfectant that is tuberculocidal because Mycobacterium tuberculosis is a resistant
microbe and all other less resistant microbes would also be killed.
Question options:
a. Both the statement and the reason are true
b. Both the statement and the reason are false
c. The statement is true; the reason is false
d. The statement is false; the reason is true - ✔✔a. Both the statement and the reason are
true
Which of the following characteristics best describes the use of protective barriers for
clinical contact surfaces?
Question options:
a. They need to be changes only when visibly soiled
b. They should not replace disinfection between patients
c. They are ideally used for surfaces that are difficult to disinfect
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Answers 100% Pass
Sterilization failure is most often caused by:
a. The autoclave not working properly
b. Improper packaging
c. Overloading the steam autoclave sterilizer
d. Not reaching the effective temperature - ✔✔c. Overloading the steam autoclave
sterilizer
A chemical indicator is used on the outside of packaging to identify the items that have
been processed through the sterilizer. The chemical indicator changes color when the
packages are sterile.
a. Both statements are true
b. Both statements are false
c. The first statement is true; the second statement is false
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,d. The first statement is flase; the second statement is true - ✔✔c. The first statement is
true; the second statement is false
Which of the following statements is true regarding the handling of regulated infectious
waste?
a. Containers of infectious waste must be identified with the biohazard symbol
b. Infectious waste can be disinfected and then combined with the regular trash
c. Infectious waste must be sterilzed before leaving the oral health care setting
d. Infectious waste does not require any special handling in some states - ✔✔a.
Containers of infectious waste must be identified with the biohazard symbol
Glutaraldehyde is a high-level disinfectant/sterilant and can be used to sterilize heat-
sensitive items.
a. Both statements are true
b. Both statements are false
c. The first statement is true; the second is false
d. The first statement is false; the second is true - ✔✔a. Both statements are true
What is the maximum level of bacteria that the EPA allows in dental unit water?
Question options:
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,a. 100 CFU/mL
b. 300 CFU/ml
c. 500 CFU/ml
d. 800 CFU/ml - ✔✔c. 500 CFU/ml
Which of the following indicators is used to determine sterility?
Question options:
a. External indicator
b. Integrated indicator
c. Biologic indicator
d. Chemical indicator - ✔✔c. Biologic indicator
Which of the following methods or materials is the most effective for preventing
transmission of heaptitus B in the oral health care setting?
Question options:
a. Vaccination with HBV surface antigen
b. Disinfecting surfaces contaminated with HBV
c. Wearing double gloves for HBV carriers
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, d. Screening clients for active HBV infection - ✔✔a. Vaccination with HBV surface
antigen
The CDC recommends disinfecting clinical contact surfaces with an intermediate-level
disinfectant that is tuberculocidal because Mycobacterium tuberculosis is a resistant
microbe and all other less resistant microbes would also be killed.
Question options:
a. Both the statement and the reason are true
b. Both the statement and the reason are false
c. The statement is true; the reason is false
d. The statement is false; the reason is true - ✔✔a. Both the statement and the reason are
true
Which of the following characteristics best describes the use of protective barriers for
clinical contact surfaces?
Question options:
a. They need to be changes only when visibly soiled
b. They should not replace disinfection between patients
c. They are ideally used for surfaces that are difficult to disinfect
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