DANB RHS PRACTICE EXAM 2025
QUESTIONS AND ANSWERS
To prevent cross-contamination, wipe the counter top with - ANS an epa- approved
disinfectant
If disposable barriers are not used during a radiographic procedure all clinical surfaces should
be - ANS disinfected
Which of the following pathogens is NOT found in oral or respiratory secretions? - ANS west
nile virus
How often should protective clothing be changed in an oral healthcare setting? - ANS when
visibly soiled
When preparing to take a digital radiograph, after selecting the appropriate sensor size for the
patient, the next step is to - ANS place a barrier on the sensor
The total destruction of microorganisms and spores on reusable instruments is accomplished by
- ANS sterilizing
Which organization regulates disinfectants and chemical sterilants? - ANS EPA
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Page
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, After an exposed film has been removed from a patient's mouth, the next step is to - ANS dry
the exposed film
The best way to prevent cross-contamination from an exposed film packet is by - ANS using
individual barrier envelopes
When executing a routine hand wash, the dental assistant should lather and scrub for a
minimum of - ANS 15 sec
During radiographic exposures, semi-critical items that must be sterilized or disposed of include
- ANS film holding devices
Which type of gloves are required for the decontamination of the darkroom? - ANS nitrile
utility
Which part of the x-ray machine should be covered or disinfected after each patient? -
ANS tubehead
The best way a dental assistant can minimize cross-contamination when exposing radiographs
is to - ANS touch as few surfaces as possible
After a patient has been dismissed, dental unit surfaces and counter tops that may have
been contaminated should be cleaned with an EPA-registered - ANS intermediate- level
disinfectant
When removing a protective barrier after the exposure of radiographs, if a dental assistant
touches the surface beneath the barrier the dental assistant must - ANS disinfect the surface
with an intermediate- level disinfectant
2
Page
When preparing a patient for a radiographic procedure, PRIOR to putting on gloves
@COPYRIGHT SIRJOEL 2025/2026
QUESTIONS AND ANSWERS
To prevent cross-contamination, wipe the counter top with - ANS an epa- approved
disinfectant
If disposable barriers are not used during a radiographic procedure all clinical surfaces should
be - ANS disinfected
Which of the following pathogens is NOT found in oral or respiratory secretions? - ANS west
nile virus
How often should protective clothing be changed in an oral healthcare setting? - ANS when
visibly soiled
When preparing to take a digital radiograph, after selecting the appropriate sensor size for the
patient, the next step is to - ANS place a barrier on the sensor
The total destruction of microorganisms and spores on reusable instruments is accomplished by
- ANS sterilizing
Which organization regulates disinfectants and chemical sterilants? - ANS EPA
1
Page
@COPYRIGHT SIRJOEL 2025/2026
, After an exposed film has been removed from a patient's mouth, the next step is to - ANS dry
the exposed film
The best way to prevent cross-contamination from an exposed film packet is by - ANS using
individual barrier envelopes
When executing a routine hand wash, the dental assistant should lather and scrub for a
minimum of - ANS 15 sec
During radiographic exposures, semi-critical items that must be sterilized or disposed of include
- ANS film holding devices
Which type of gloves are required for the decontamination of the darkroom? - ANS nitrile
utility
Which part of the x-ray machine should be covered or disinfected after each patient? -
ANS tubehead
The best way a dental assistant can minimize cross-contamination when exposing radiographs
is to - ANS touch as few surfaces as possible
After a patient has been dismissed, dental unit surfaces and counter tops that may have
been contaminated should be cleaned with an EPA-registered - ANS intermediate- level
disinfectant
When removing a protective barrier after the exposure of radiographs, if a dental assistant
touches the surface beneath the barrier the dental assistant must - ANS disinfect the surface
with an intermediate- level disinfectant
2
Page
When preparing a patient for a radiographic procedure, PRIOR to putting on gloves
@COPYRIGHT SIRJOEL 2025/2026
