DENTAL LAWS AND INFECTION CONTROL EVALUATION
EXAM 2025 QUESTIONS WITH ANSWERS RATED A+
✔✔Factors contributing to the formation of bacteria in DUWLs include all of the
following except one. Which one is the exception?
a. backflow from a saliva ejector.
b. stagnant water.
c. well water coming from a tap.
d. water heating. - ✔✔c. well water coming from tap
✔✔Methods of reducing the level of bacterial contamination in waterlines include all of
the following except one. Which one is the exception?
a. chemical treatment regimens.
b. yearly replacement of all dental unit waterlines.
c. microfiltration.
d. self-contained water reservoirs. - ✔✔b. yearly replacement of all dental unit
waterlines
✔✔Flushing the dental waterlines at the beginning of the treatment day and for 20 to 30
seconds between patients will help to do - ✔✔reduce the microbial count
✔✔To reduce the microbial count temporarily and to help clean the handpiece
waterlines, DUWLs should be flushed - ✔✔at the beginning of the day and for 20 to 30
seconds between patients
✔✔The bacteria in the biofilm are more resistant to chemical germicides than planktonic
bacteria by a factor of - ✔✔1500
✔✔During routine dental procedures, biofilm and bacteria found in water from municipal
lines can enter the oral cavity of a patient through - ✔✔the handpiece and waterline
✔✔The type of plaque that develops inside DUWLs, consisting of bacterial cells and
other microbes, is called - ✔✔biofilm
✔✔Biofilm can contain many types of bacteria, - ✔✔fungi, algae, and protozoa
✔✔Are waterborne diseases limited to dentistry? - ✔✔no
, ✔✔when was the presence of bacteria first reported in the dental unit waterlines - ✔✔30
years
✔✔what bacteria cause the disease legionellosis - ✔✔Legionella bacteria
✔✔Where is biofilm found? - ✔✔Handpiece waterline and air-water syringe waterline.
✔✔should water be heated in the dental units to kill the bacteria - ✔✔no
✔✔If sterile water is used in a self-contained reservoir, will the water that enters the
patient's mouth be sterile? - ✔✔no
✔✔how often should microfilters in waterlines be changes - ✔✔according to
manufactors direction
✔✔According to CDC guidelines, whom should you contact when selecting a chemical
for the dental unit? - ✔✔equipment manufacturer
✔✔according to the CDC guidelines, what type of water must be used as an irrigate for
surgery involving bone - ✔✔sterile water
✔✔Will flushing dental unit waterlines remove biofilm? - ✔✔no
✔✔When should the HVE be used to minimize aerosol? - ✔✔with the high speed
handpiece, ultrasonic scaler, and air-water syringe
✔✔Will the use of a rubber dam totally eliminate the dental assistant's exposure to
microorganisms? - ✔✔no
✔✔What type of PPE is especially critical when aerosol is being generated? -
✔✔eyeware and mask
✔✔What color coding is used for oxygen supplies in the dental office? - ✔✔green
✔✔What is the medical term used for fainting? - ✔✔syncope
✔✔What is another term used for a cerebrovascular accident? - ✔✔stroke
✔✔Which of the following statements is a sign of a patient's present condition during an
emergency? - ✔✔my blood pressure is elevated
✔✔What do most sudden cardiac arrest victims experience? - ✔✔ventricular fibrillation
EXAM 2025 QUESTIONS WITH ANSWERS RATED A+
✔✔Factors contributing to the formation of bacteria in DUWLs include all of the
following except one. Which one is the exception?
a. backflow from a saliva ejector.
b. stagnant water.
c. well water coming from a tap.
d. water heating. - ✔✔c. well water coming from tap
✔✔Methods of reducing the level of bacterial contamination in waterlines include all of
the following except one. Which one is the exception?
a. chemical treatment regimens.
b. yearly replacement of all dental unit waterlines.
c. microfiltration.
d. self-contained water reservoirs. - ✔✔b. yearly replacement of all dental unit
waterlines
✔✔Flushing the dental waterlines at the beginning of the treatment day and for 20 to 30
seconds between patients will help to do - ✔✔reduce the microbial count
✔✔To reduce the microbial count temporarily and to help clean the handpiece
waterlines, DUWLs should be flushed - ✔✔at the beginning of the day and for 20 to 30
seconds between patients
✔✔The bacteria in the biofilm are more resistant to chemical germicides than planktonic
bacteria by a factor of - ✔✔1500
✔✔During routine dental procedures, biofilm and bacteria found in water from municipal
lines can enter the oral cavity of a patient through - ✔✔the handpiece and waterline
✔✔The type of plaque that develops inside DUWLs, consisting of bacterial cells and
other microbes, is called - ✔✔biofilm
✔✔Biofilm can contain many types of bacteria, - ✔✔fungi, algae, and protozoa
✔✔Are waterborne diseases limited to dentistry? - ✔✔no
, ✔✔when was the presence of bacteria first reported in the dental unit waterlines - ✔✔30
years
✔✔what bacteria cause the disease legionellosis - ✔✔Legionella bacteria
✔✔Where is biofilm found? - ✔✔Handpiece waterline and air-water syringe waterline.
✔✔should water be heated in the dental units to kill the bacteria - ✔✔no
✔✔If sterile water is used in a self-contained reservoir, will the water that enters the
patient's mouth be sterile? - ✔✔no
✔✔how often should microfilters in waterlines be changes - ✔✔according to
manufactors direction
✔✔According to CDC guidelines, whom should you contact when selecting a chemical
for the dental unit? - ✔✔equipment manufacturer
✔✔according to the CDC guidelines, what type of water must be used as an irrigate for
surgery involving bone - ✔✔sterile water
✔✔Will flushing dental unit waterlines remove biofilm? - ✔✔no
✔✔When should the HVE be used to minimize aerosol? - ✔✔with the high speed
handpiece, ultrasonic scaler, and air-water syringe
✔✔Will the use of a rubber dam totally eliminate the dental assistant's exposure to
microorganisms? - ✔✔no
✔✔What type of PPE is especially critical when aerosol is being generated? -
✔✔eyeware and mask
✔✔What color coding is used for oxygen supplies in the dental office? - ✔✔green
✔✔What is the medical term used for fainting? - ✔✔syncope
✔✔What is another term used for a cerebrovascular accident? - ✔✔stroke
✔✔Which of the following statements is a sign of a patient's present condition during an
emergency? - ✔✔my blood pressure is elevated
✔✔What do most sudden cardiac arrest victims experience? - ✔✔ventricular fibrillation
