RDA 1220 MIDTERM EXAM QUESTIONS
WITH 100% CORRECT ANSWERS |
ALREADY PASSED
What must be labeled with a biohazard symbol? - Answer- Infectious waste containers.
Should extracted teeth with amalgam be incinerated? - Answer- No, due to mercury
content.
What regulates waste after it leaves the office? - Answer- EPA and state laws.
What is required for chemical inventory? - Answer- A complete list of all hazardous
chemicals.
What must happen when a new chemical is added? - Answer- Add to inventory and
include SDS.
What is the NFPA labeling system? - Answer- A diamond system rating health,
flammability, reactivity, special hazards.
What color indicates health hazard in NFPA? - Answer- Blue.
What color indicates flammability in NFPA? - Answer- Red.
What is the primary source of DUWL microorganisms? - Answer- Public water supply.
What is backflow? - Answer- Retraction of saliva into waterlines.
What device prevents backflow? - Answer- Antiretraction valves.
What are planktonic bacteria? - Answer- Free-floating bacteria.
What is biofilm? - Answer- Microbial slime layer attached to surfaces.
Why is biofilm hard to kill? - Answer- Bacteria are highly resistant inside it.
What promotes biofilm growth? - Answer- Slow flow and stagnation.
What are methods to reduce DUWL contamination? - Answer- Reservoirs,
microfiltration, chemicals.
, Can DUWL water be used for surgery involving bone? - Answer- No, sterile water must
be used.
How often should DUWL be flushed? - Answer- Each morning and between patients.
Does flushing remove biofilm? - Answer- No, but it reduces microbial count temporarily.
Why use high-volume evacuation? - Answer- To reduce aerosol contamination.
How does a dental dam help? - Answer- Reduces aerosol and contamination.
What CFU level should dental water meet? - Answer- EPA drinking water standards
(≤500 CFU/mL).
How should water quality be monitored? - Answer- Commercial testing or in-office kits.
How long should water be discharged after treatment? - Answer- 20-30 seconds.
Why are saliva ejectors a risk? - Answer- They can create backflow.
What happens when a patient seals lips around saliva ejector? - Answer- Partial
vacuum causing backflow.
Can viruses multiply in DUWL? - Answer- No.
What are two bacterial communities in DUWL? - Answer- Planktonic and biofilm.
What is the benefit of self-contained reservoirs? - Answer- Improved water quality
control.
What is the benefit of microfiltration cartridges? - Answer- Reduces bacterial
contamination.
What is the benefit of chemical agents in DUWL? - Answer- Control microbial growth.
Why is infection control critical in DUWL? - Answer- Prevents disease transmission.
What is the overall goal of dental infection control? - Answer- Protect patients and
dental staff from disease.
What is microbiology? - Answer- The study of microorganisms.
Why is microbiology important in dentistry? - Answer- It helps prevent disease
transmission in the dental office.
Who is the Father of Microbiology? - Answer- Louis Pasteur.
WITH 100% CORRECT ANSWERS |
ALREADY PASSED
What must be labeled with a biohazard symbol? - Answer- Infectious waste containers.
Should extracted teeth with amalgam be incinerated? - Answer- No, due to mercury
content.
What regulates waste after it leaves the office? - Answer- EPA and state laws.
What is required for chemical inventory? - Answer- A complete list of all hazardous
chemicals.
What must happen when a new chemical is added? - Answer- Add to inventory and
include SDS.
What is the NFPA labeling system? - Answer- A diamond system rating health,
flammability, reactivity, special hazards.
What color indicates health hazard in NFPA? - Answer- Blue.
What color indicates flammability in NFPA? - Answer- Red.
What is the primary source of DUWL microorganisms? - Answer- Public water supply.
What is backflow? - Answer- Retraction of saliva into waterlines.
What device prevents backflow? - Answer- Antiretraction valves.
What are planktonic bacteria? - Answer- Free-floating bacteria.
What is biofilm? - Answer- Microbial slime layer attached to surfaces.
Why is biofilm hard to kill? - Answer- Bacteria are highly resistant inside it.
What promotes biofilm growth? - Answer- Slow flow and stagnation.
What are methods to reduce DUWL contamination? - Answer- Reservoirs,
microfiltration, chemicals.
, Can DUWL water be used for surgery involving bone? - Answer- No, sterile water must
be used.
How often should DUWL be flushed? - Answer- Each morning and between patients.
Does flushing remove biofilm? - Answer- No, but it reduces microbial count temporarily.
Why use high-volume evacuation? - Answer- To reduce aerosol contamination.
How does a dental dam help? - Answer- Reduces aerosol and contamination.
What CFU level should dental water meet? - Answer- EPA drinking water standards
(≤500 CFU/mL).
How should water quality be monitored? - Answer- Commercial testing or in-office kits.
How long should water be discharged after treatment? - Answer- 20-30 seconds.
Why are saliva ejectors a risk? - Answer- They can create backflow.
What happens when a patient seals lips around saliva ejector? - Answer- Partial
vacuum causing backflow.
Can viruses multiply in DUWL? - Answer- No.
What are two bacterial communities in DUWL? - Answer- Planktonic and biofilm.
What is the benefit of self-contained reservoirs? - Answer- Improved water quality
control.
What is the benefit of microfiltration cartridges? - Answer- Reduces bacterial
contamination.
What is the benefit of chemical agents in DUWL? - Answer- Control microbial growth.
Why is infection control critical in DUWL? - Answer- Prevents disease transmission.
What is the overall goal of dental infection control? - Answer- Protect patients and
dental staff from disease.
What is microbiology? - Answer- The study of microorganisms.
Why is microbiology important in dentistry? - Answer- It helps prevent disease
transmission in the dental office.
Who is the Father of Microbiology? - Answer- Louis Pasteur.
