Which of the Following Statements Is True About Dental Unit

Multiple Choice

Which of the following statements is true about dental unit waterlines?

A) Viruses cannot multiply in the DUWL.
B) The use of sterile water in the self-contained water reservoir ensures that water will be sterile at the point of delivery.
C) Microfilters reduce the bacterial contamination of water and destroy the biofilms that colonize the DUWLs.
D) Flushing for 20 to 30 seconds after each patient will remove biofilms from the lines.